{"id":138012,"date":"2021-03-24T00:00:00","date_gmt":"2021-03-24T00:00:00","guid":{"rendered":"https:\/\/adapty.io\/blog\/android-in-app-purchases-google-play-billing-library-part-2\/"},"modified":"2025-06-26T13:05:11","modified_gmt":"2025-06-26T13:05:11","slug":"android-in-app-purchases-google-play-billing-library-part-2","status":"publish","type":"post","link":"https:\/\/adapty.io\/ko\/blog\/android-in-app-purchases-google-play-billing-library-part-2\/","title":{"rendered":"Android \uc778\uc571 \uad6c\ub9e4, 2\ubd80: Google Play \uacb0\uc81c \ub77c\uc774\ube0c\ub7ec\ub9ac (Google Play Billing Library)\ub85c \uad6c\ub9e4 \ucc98\ub9ac\ud558\uae30"},"content":{"rendered":" <p>\uc774\uc804\uae30\uc0ac\uc5d0\uc11c \uacb0\uc81c \ub77c\uc774\ube0c\ub7ec\ub9ac\uc640 \ud568\uaed8 \uc791\ub3d9\ud558\ub294 \ub798\ud37c\ud074\ub798\uc2a4\ub97c \uc0dd\uc131\ud588\uc2b5\ub2c8\ub2e4.<\/p>    <div class=\"wp-block-kevinbatdorf-code-block-pro\" data-code-block-pro-font-family=\"\" style=\"font-size:.875rem;line-height:1.25rem\"><span role=\"button\" tabindex=\"0\" data-code=\"import android.content.Context import com.android.billingclient.api.* class BillingClientWrapper(context: Context) : PurchasesUpdatedListener {    interface OnQueryProductsListener {        fun onSuccess(products: List&lt;SkuDetails&gt;)        fun onFailure(error: Error)    }    class Error(val responseCode: Int, val debugMessage: String)    private val billingClient = BillingClient        .newBuilder(context)        .enablePendingPurchases()        .setListener(this)        .build()    fun queryProducts(listener: OnQueryProductsListener) {        val skusList = listOf(&quot;premium_sub_month&quot;, &quot;premium_sub_year&quot;, &quot;some_inapp&quot;)        queryProductsForType(            skusList,            BillingClient.SkuType.SUBS        ) { billingResult, skuDetailsList -&gt;            if (billingResult.responseCode == BillingClient.BillingResponseCode.OK) {                val products = skuDetailsList ?: mutableListOf()                queryProductsForType(                    skusList,                    BillingClient.SkuType.INAPP                ) { billingResult, skuDetailsList -&gt;                    if (billingResult.responseCode == BillingClient.BillingResponseCode.OK) {                        products.addAll(skuDetailsList ?: listOf())                        listener.onSuccess(products)                    } else {                        listener.onFailure(                            Error(billingResult.responseCode, billingResult.debugMessage)                        )                    }                }            } else {                listener.onFailure(                    Error(billingResult.responseCode, billingResult.debugMessage)                )            }        }    }    private fun queryProductsForType(        skusList: List&lt;String&gt;,        @BillingClient.SkuType type: String,        listener: SkuDetailsResponseListener    ) {        onConnected {            billingClient.querySkuDetailsAsync(                SkuDetailsParams.newBuilder().setSkusList(skusList).setType(type).build(),                listener            )        }    }    private fun onConnected(block: () -&gt; Unit) {        billingClient.startConnection(object : BillingClientStateListener {            override fun onBillingSetupFinished(billingResult: BillingResult) {                block()            }            override fun onBillingServiceDisconnected() {                \/\/ Try to restart the connection on the next request to                \/\/ Google Play by calling the startConnection() method.            }        })    }    override fun onPurchasesUpdated(billingResult: BillingResult, purchaseList: MutableList&lt;Purchase&gt;?) {        \/\/ here come callbacks about new purchases    } }\" style=\"color:#d8dee9ff;display:none\" aria-label=\"Copy\" class=\"code-block-pro-copy-button\"><svg  style=\"width:24px;height:24px\" fill=\"none\" viewBox=\"0 0 24 24\" stroke=\"currentColor\" stroke-width=\"2\"><path class=\"with-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2m-6 9l2 2 4-4\"><\/path><path class=\"without-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2\"><\/path><\/svg><\/span><pre class=\"shiki nord\" style=\"background-color: #2e3440ff\"><code><span class=\"line\"><span style=\"color: #81A1C1\">import<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">android.content.Context<\/span><\/span> <span class=\"line\"><span style=\"color: #81A1C1\">import<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">com.android.billingclient.api.*<\/span><\/span> <span class=\"line\"><span style=\"color: #81A1C1\">class<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">BillingClientWrapper<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9\">context<\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">Context<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB; font-weight: bold\">PurchasesUpdatedListener<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #81A1C1\">interface<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">OnQueryProductsListener<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #81A1C1\">fun<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #88C0D0\">onSuccess<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9\">products<\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">List<\/span><span style=\"color: #81A1C1\">&lt;<\/span><span style=\"color: #8FBCBB\">SkuDetails<\/span><span style=\"color: #81A1C1\">&gt;<\/span><span style=\"color: #ECEFF4\">)<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #81A1C1\">fun<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #88C0D0\">onFailure<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9\">error<\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">Error<\/span><span style=\"color: #ECEFF4\">)<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #81A1C1\">class<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">Error<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #81A1C1\">val<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #D8DEE9\">responseCode<\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">Int<\/span><span style=\"color: #ECEFF4\">,<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">val<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #D8DEE9\">debugMessage<\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">String<\/span><span style=\"color: #ECEFF4\">)<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #81A1C1\">private<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">val<\/span><span style=\"color: #D8DEE9FF\"> billingClient <\/span><span style=\"color: #81A1C1\">=<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">BillingClient<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">newBuilder<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9FF\">context<\/span><span style=\"color: #ECEFF4\">)<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">enablePendingPurchases<\/span><span style=\"color: #ECEFF4\">()<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">setListener<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #81A1C1\">this<\/span><span style=\"color: #ECEFF4\">)<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">build<\/span><span style=\"color: #ECEFF4\">()<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #81A1C1\">fun<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #88C0D0\">queryProducts<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9\">listener<\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">OnQueryProductsListener<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #81A1C1\">val<\/span><span style=\"color: #D8DEE9FF\"> skusList <\/span><span style=\"color: #81A1C1\">=<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #88C0D0\">listOf<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #A3BE8C\">premium_sub_month<\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #ECEFF4\">,<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #A3BE8C\">premium_sub_year<\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #ECEFF4\">,<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #A3BE8C\">some_inapp<\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #ECEFF4\">)<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       queryProductsForType<\/span><span style=\"color: #ECEFF4\">(<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">           skusList<\/span><span style=\"color: #ECEFF4\">,<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">           <\/span><span style=\"color: #8FBCBB\">BillingClient<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #8FBCBB\">SkuType<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #8FBCBB\">SUBS<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><span style=\"color: #D8DEE9FF\"> billingResult<\/span><span style=\"color: #ECEFF4\">,<\/span><span style=\"color: #D8DEE9FF\"> skuDetailsList <\/span><span style=\"color: #81A1C1\">-&gt;<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">           <\/span><span style=\"color: #81A1C1\">if<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9FF\">billingResult<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">responseCode <\/span><span style=\"color: #81A1C1\">==<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">BillingClient<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #8FBCBB\">BillingResponseCode<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #8FBCBB\">OK<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">               <\/span><span style=\"color: #81A1C1\">val<\/span><span style=\"color: #D8DEE9FF\"> products <\/span><span style=\"color: #81A1C1\">=<\/span><span style=\"color: #D8DEE9FF\"> skuDetailsList <\/span><span style=\"color: #81A1C1\">?:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #88C0D0\">mutableListOf<\/span><span style=\"color: #ECEFF4\">()<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">               queryProductsForType<\/span><span style=\"color: #ECEFF4\">(<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">                   skusList<\/span><span style=\"color: #ECEFF4\">,<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">                   <\/span><span style=\"color: #8FBCBB\">BillingClient<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #8FBCBB\">SkuType<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #8FBCBB\">INAPP<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">               <\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><span style=\"color: #D8DEE9FF\"> billingResult<\/span><span style=\"color: #ECEFF4\">,<\/span><span style=\"color: #D8DEE9FF\"> skuDetailsList <\/span><span style=\"color: #81A1C1\">-&gt;<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">                   <\/span><span style=\"color: #81A1C1\">if<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9FF\">billingResult<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">responseCode <\/span><span style=\"color: #81A1C1\">==<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">BillingClient<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #8FBCBB\">BillingResponseCode<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #8FBCBB\">OK<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">                       products<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">addAll<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9FF\">skuDetailsList <\/span><span style=\"color: #81A1C1\">?:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #88C0D0\">listOf<\/span><span style=\"color: #ECEFF4\">())<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">                       listener<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">onSuccess<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9FF\">products<\/span><span style=\"color: #ECEFF4\">)<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">                   <\/span><span style=\"color: #ECEFF4\">}<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">else<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">                       listener<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">onFailure<\/span><span style=\"color: #ECEFF4\">(<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">                           <\/span><span style=\"color: #8FBCBB\">Error<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9FF\">billingResult<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">responseCode<\/span><span style=\"color: #ECEFF4\">,<\/span><span style=\"color: #D8DEE9FF\"> billingResult<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">debugMessage<\/span><span style=\"color: #ECEFF4\">)<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">                       <\/span><span style=\"color: #ECEFF4\">)<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">                   <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">               <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">           <\/span><span style=\"color: #ECEFF4\">}<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">else<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">               listener<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">onFailure<\/span><span style=\"color: #ECEFF4\">(<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">                   <\/span><span style=\"color: #8FBCBB\">Error<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9FF\">billingResult<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">responseCode<\/span><span style=\"color: #ECEFF4\">,<\/span><span style=\"color: #D8DEE9FF\"> billingResult<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">debugMessage<\/span><span style=\"color: #ECEFF4\">)<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">               <\/span><span style=\"color: #ECEFF4\">)<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">           <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #81A1C1\">private<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">fun<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #88C0D0\">queryProductsForType<\/span><span style=\"color: #ECEFF4\">(<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #D8DEE9\">skusList<\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">List<\/span><span style=\"color: #81A1C1\">&lt;<\/span><span style=\"color: #8FBCBB\">String<\/span><span style=\"color: #81A1C1\">&gt;<\/span><span style=\"color: #ECEFF4\">,<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #81A1C1\">@BillingClient.SkuType<\/span><span style=\"color: #ECEFF4\"> <\/span><span style=\"color: #D8DEE9\">type<\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">String<\/span><span style=\"color: #ECEFF4\">,<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #D8DEE9\">listener<\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">SkuDetailsResponseListener<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       onConnected <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">           billingClient<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">querySkuDetailsAsync<\/span><span style=\"color: #ECEFF4\">(<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">               <\/span><span style=\"color: #8FBCBB\">SkuDetailsParams<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">newBuilder<\/span><span style=\"color: #ECEFF4\">().<\/span><span style=\"color: #D8DEE9FF\">setSkusList<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9FF\">skusList<\/span><span style=\"color: #ECEFF4\">).<\/span><span style=\"color: #D8DEE9FF\">setType<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9FF\">type<\/span><span style=\"color: #ECEFF4\">).<\/span><span style=\"color: #D8DEE9FF\">build<\/span><span style=\"color: #ECEFF4\">(),<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">               listener<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">           <\/span><span style=\"color: #ECEFF4\">)<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #81A1C1\">private<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">fun<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #88C0D0\">onConnected<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9\">block<\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">()<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">-&gt;<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">Unit<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       billingClient<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">startConnection<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #81A1C1\">object<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">BillingClientStateListener<\/span><span style=\"color: #D8DEE9FF\"> {<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">           override fun onBillingSetupFinished<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9FF\">billingResult<\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">BillingResult<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> {<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">               block<\/span><span style=\"color: #ECEFF4\">()<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">           }<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">           override fun onBillingServiceDisconnected<\/span><span style=\"color: #ECEFF4\">()<\/span><span style=\"color: #D8DEE9FF\"> {<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">               <\/span><span style=\"color: #81A1C1\">\/\/<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">Try<\/span><span style=\"color: #D8DEE9FF\"> to restart the connection on the next request to<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">               <\/span><span style=\"color: #81A1C1\">\/\/<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">Google<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">Play<\/span><span style=\"color: #D8DEE9FF\"> by calling the startConnection<\/span><span style=\"color: #ECEFF4\">()<\/span><span style=\"color: #D8DEE9FF\"> method<\/span><span style=\"color: #ECEFF4\">.<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">           }<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       }<\/span><span style=\"color: #ECEFF4\">)<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #81A1C1\">override<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">fun<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #88C0D0\">onPurchasesUpdated<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9\">billingResult<\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">BillingResult<\/span><span style=\"color: #ECEFF4\">,<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #D8DEE9\">purchaseList<\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">MutableList<\/span><span style=\"color: #81A1C1\">&lt;<\/span><span style=\"color: #8FBCBB\">Purchase<\/span><span style=\"color: #81A1C1\">&gt;<\/span><span style=\"color: #D8DEE9FF\">?<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #616E88\">\/\/ here come callbacks about new purchases<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><span style=\"color: #ECEFF4\">}<\/span><\/span><\/code><\/pre><\/div>    <p>\uad6c\ub9e4\uad6c\ud604(purchaseimplementation)\uc73c\ub85c\uc9c4\ud589\ud558\uc5ec \ud074\ub798\uc2a4\ub97c \uac1c\uc120\ud574 \ubcf4\uaca0\uc2b5\ub2c8\ub2e4.<\/p>      <h2 class=\"wp-block-heading\" id=\"%ea%b5%ac%eb%8f%85%ed%99%94%eb%a9%b4-%eb%94%94%ec%9e%90%ec%9d%b8%ed%95%98%ea%b8%b0\">\uad6c\ub3c5\ud654\uba74 \ub514\uc790\uc778\ud558\uae30<\/h2>    <p>\uc778\uc571\uad6c\ub9e4 \uae30\ub2a5\uc774 \uc788\ub294 \ubaa8\ub4e0 \uc571 (app)\uc5d0\ub294\ud398\uc774\uc6d4 (paywall)\ud654\uba74\uc774\uc788\uc2b5\ub2c8\ub2e4.<a href=\"https:\/\/support.google.com\/googleplay\/android-developer\/answer\/9900533\" target=\"_blank\" rel=\"noopener nofollow\">Google\uc815\ucc45<\/a>\uc774\uc774\ub7ec\ud55c \ud654\uba74\uc5d0 \ubc18\ub4dc\uc2dc \uc788\uc5b4\uc57c \ud558\ub294 \ucd5c\uc18c\ud55c\uc758 \uc694\uc18c\uc640\uc9c0\uce68 \ud14d\uc2a4\ud2b8\ub97c \uc815\uc758\ud569\ub2c8\ub2e4.\uc694\uc57d\ud558\uc790\uba74\ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4.\ud398\uc774\uc6d4\ud654\uba74\uc5d0\uc11c \uad6c\ub3c5 \uc870\uac74,\ube44\uc6a9\ubc0f \uae30\uac04\uc744 \uba85\uc2dc\ud558\uace0 \uc571\uc744 \uc0ac\uc6a9\ud558\uae30 \uc704\ud574 \uad6c\ub3c5\uc774 \ud544\uc694\ud55c\uc9c0\uc5ec\ubd80\ub97c \uad6c\uccb4\uc801\uc73c\ub85c \uc9c0\uc815\ud574\uc57c \ud569\ub2c8\ub2e4.\ub610\ud55c\uc0ac\uc6a9\uc790\uac00 \uc870\uac74\uc744 \uac80\ud1a0\ud558\uae30 \uc704\ud574 \ucd94\uac00 \uc791\uc5c5\uc744 \uc218\ud589\ud558\ub3c4\ub85d\uac15\uc694\ud574\uc11c\ub294 \uc548 \ub429\ub2c8\ub2e4.<\/p>    <p>\uc5ec\uae30\uc11c\ub294\ub2e8\uc21c\ud654\ub41c \ud398\uc774\uc6d4 \ud654\uba74\uc744 \uc608\ub85c \uc0ac\uc6a9\ud569\ub2c8\ub2e4.<\/p>   <div class=\"wp-block-image\"> <figure class=\"aligncenter is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/adapty.io\/wp-content\/uploads\/2023\/03\/611e0b607bcbad683e723934_image20255-3.png\" alt=\"android sample paywall\" width=\"271\" height=\"572\"\/><figcaption class=\"wp-element-caption\"><em>Android\uc0d8\ud50c\ud398\uc774\uc6d4<\/em><\/figcaption><\/figure><\/div>   <p>\ud398\uc774\uc6d4\ud654\uba74\uc5d0\ub294 \ub2e4\uc74c \uc694\uc18c\uac00 \uc788\uc2b5\ub2c8\ub2e4.<\/p>    <ul class=\"wp-block-list\"> <li>\uc81c\ubaa9.<\/li>    <li>\uad6c\ub9e4 \uc808\ucc28\ub97c \uc2dc\uc791\ud558\ub3c4\ub85d \uc124\uc815\ub41c \ubc84\ud2bc\uc785\ub2c8\ub2e4. \uc774 \ubc84\ud2bc\uc740 \uc0ac\uc6a9\uc790\uc5d0\uac8c \uc81c\ubaa9 \ubc0f \ube44\uc6a9\uacfc \uac19\uc740 \uad6c\ub3c5 \uc635\uc158\uc758 \uc77c\ubc18 \uc138\ubd80 \uc815\ubcf4\uc5d0 \ub300\ud574 \uc548\ub0b4\ud558\uba70, \ube44\uc6a9\uc758 \uacbd\uc6b0 \ud604\uc9c0 \ud1b5\ud654\ub85c \ud45c\uc2dc\ub429\ub2c8\ub2e4.<\/li>    <li>\uc9c0\uce68 \ud14d\uc2a4\ud2b8. <\/li>    <li> \uc774\uc804\uc5d0 \uad6c\ub9e4\ud55c \ud56d\ubaa9\uc744 \ubcf5\uc6d0\ud558\ub294 \ubc84\ud2bc\uc785\ub2c8\ub2e4. \uc774 \uc694\uc18c\ub294 \uad6c\ub3c5 \ub610\ub294 \ube44\uc18c\ubaa8\uc131 \uad6c\ub9e4 \uae30\ub2a5\uc774 \uc788\ub294 \ubaa8\ub4e0 \uc571\uc758 \ud544\uc218 \uc694\uc18c\uc785\ub2c8\ub2e4.<\/li> <\/ul>    <p>\ucf54\ub4dc\ub97c\uc218\uc815\ud558\uc5ec \uc81c\ud488 \uc138\ubd80 \uc815\ubcf4 \ud45c\uc2dc<\/p>    <p>\uc774\uc608\uc81c\uc5d0\ub294 4\uac00\uc9c0\uc81c\ud488\uc774 \uc788\uc2b5\ub2c8\ub2e4.<\/p>    <ul class=\"wp-block-list\"> <li>\uc790\ub3d9 \uac31\uc2e0 \uad6c\ub3c5 2\uac1c (&#8220;premium_sub_month&#8221; \ubc0f &#8220;premium_sub_year&#8221;),<\/li>    <li>\ub450 \ubc88 \uad6c\ub9e4\ud560 \uc218 \uc5c6\ub294 \uc81c\ud488 \ub610\ub294 \ube44\uc18c\ubaa8\uc131 \uc81c\ud488 (&#8220;unlock_feature&#8221;),<\/li>    <li>\uc5ec\ub7ec \ubc88 \uad6c\ub9e4\ud560 \uc218 \uc788\ub294 \uc0c1\ud488 \ub610\ub294 \uc18c\ubaa8\uc131 \uc81c\ud488 (&#8220;coin_pack_large&#8221;).<\/li> <\/ul>    <p>\uc608\uc81c\ub97c\ub2e8\uc21c\ud654\ud558\uae30 \uc704\ud574,\uc774\uc804\uae30\uc0ac\uc5d0\uc11c \ub9cc\ub4e0 BillingClientWrapper\uc640\ud568\uaed8 \uc0bd\uc785\ud560 \uc561\ud2f0\ube44\ud2f0\uc640 \uace0\uc815\ub41c \uc218\uc758 \uad6c\ub9e4 \ubc84\ud2bc\uc774 \uc788\ub294\ub808\uc774\uc544\uc6c3\uc744 \uc0ac\uc6a9\ud558\uaca0\uc2b5\ub2c8\ub2e4.<\/p>    <div class=\"wp-block-kevinbatdorf-code-block-pro\" data-code-block-pro-font-family=\"\" style=\"font-size:.875rem;line-height:1.25rem\"><span role=\"button\" tabindex=\"0\" data-code=\"class PaywallActivity: BaseActivity() {     @Inject    lateinit var billingClientWrapper: BillingClientWrapper     override fun onCreate(savedInstanceState: Bundle?) {        super.onCreate(savedInstanceState)        setContentView(R.layout.activity_paywall)         displayProducts() \/\/to be declared below    } }\" style=\"color:#d8dee9ff;display:none\" aria-label=\"Copy\" class=\"code-block-pro-copy-button\"><svg  style=\"width:24px;height:24px\" fill=\"none\" viewBox=\"0 0 24 24\" stroke=\"currentColor\" stroke-width=\"2\"><path class=\"with-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2m-6 9l2 2 4-4\"><\/path><path class=\"without-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2\"><\/path><\/svg><\/span><pre class=\"shiki nord\" style=\"background-color: #2e3440ff\"><code><span class=\"line\"><span style=\"color: #81A1C1\">class<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">PaywallActivity<\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB; font-weight: bold\">BaseActivity<\/span><span style=\"color: #ECEFF4\">()<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #81A1C1\">@Inject<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   lateinit <\/span><span style=\"color: #81A1C1\">var<\/span><span style=\"color: #D8DEE9FF\"> billingClientWrapper<\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">BillingClientWrapper<\/span><\/span> <span class=\"line\"><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #81A1C1\">override<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">fun<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #88C0D0\">onCreate<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9\">savedInstanceState<\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">Bundle?<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #81A1C1\">super<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">onCreate<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9FF\">savedInstanceState<\/span><span style=\"color: #ECEFF4\">)<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       setContentView<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #8FBCBB\">R<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">layout<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">activity_paywall<\/span><span style=\"color: #ECEFF4\">)<\/span><\/span> <span class=\"line\"><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       displayProducts<\/span><span style=\"color: #ECEFF4\">()<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #616E88\">\/\/to be declared below<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><span style=\"color: #ECEFF4\">}<\/span><\/span><\/code><\/pre><\/div>    <p>\ud3b8\uc758\ub97c\uc704\ud574,\ud0a4\uac00\uc81c\ud488\uc758 <a href=\"https:\/\/developer.android.com\/reference\/com\/android\/billingclient\/api\/SkuDetails#getSku()\" target=\"_blank\" rel=\"noopener nofollow\">sku<\/a>\uc778\ub9f5\uc744 \ucd94\uac00\ud558\uace0,\uac12\uc740\ud654\uba74\uc758 \ud574\ub2f9 \ubc84\ud2bc\uc785\ub2c8\ub2e4.<\/p>    <div class=\"wp-block-kevinbatdorf-code-block-pro\" data-code-block-pro-font-family=\"\" style=\"font-size:.875rem;line-height:1.25rem\"><span role=\"button\" tabindex=\"0\" data-code=\"private val purchaseButtonsMap: Map&lt;String, Button&gt; by lazy(LazyThreadSafetyMode.NONE) {    mapOf(        &quot;premium_sub_month&quot; to monthlySubButton,        &quot;premium_sub_year&quot; to yearlySubButton,        &quot;coin_pack_large&quot; to coinPackLargeButton,        &quot;unlock_feature&quot; to unlockFeatureButton,    ) }\" style=\"color:#d8dee9ff;display:none\" aria-label=\"Copy\" class=\"code-block-pro-copy-button\"><svg  style=\"width:24px;height:24px\" fill=\"none\" viewBox=\"0 0 24 24\" stroke=\"currentColor\" stroke-width=\"2\"><path class=\"with-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2m-6 9l2 2 4-4\"><\/path><path class=\"without-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2\"><\/path><\/svg><\/span><pre class=\"shiki nord\" style=\"background-color: #2e3440ff\"><code><span class=\"line\"><span style=\"color: #81A1C1\">private<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">val<\/span><span style=\"color: #D8DEE9FF\"> purchaseButtonsMap<\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">Map<\/span><span style=\"color: #81A1C1\">&lt;<\/span><span style=\"color: #8FBCBB\">String<\/span><span style=\"color: #ECEFF4\">,<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">Button<\/span><span style=\"color: #81A1C1\">&gt;<\/span><span style=\"color: #D8DEE9FF\"> by lazy<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #8FBCBB\">LazyThreadSafetyMode<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #8FBCBB\">NONE<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #88C0D0\">mapOf<\/span><span style=\"color: #ECEFF4\">(<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #A3BE8C\">premium_sub_month<\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #D8DEE9FF\"> to monthlySubButton<\/span><span style=\"color: #ECEFF4\">,<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #A3BE8C\">premium_sub_year<\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #D8DEE9FF\"> to yearlySubButton<\/span><span style=\"color: #ECEFF4\">,<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #A3BE8C\">coin_pack_large<\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #D8DEE9FF\"> to coinPackLargeButton<\/span><span style=\"color: #ECEFF4\">,<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #A3BE8C\">unlock_feature<\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #D8DEE9FF\"> to unlockFeatureButton<\/span><span style=\"color: #ECEFF4\">,<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #ECEFF4\">)<\/span><\/span> <span class=\"line\"><span style=\"color: #ECEFF4\">}<\/span><\/span><\/code><\/pre><\/div>    <p>UI\uc5d0\uc81c\ud488\uc744 \ud45c\uc2dc\ud558\ub294 \uba54\uc18c\ub4dc\ub97c \uc120\uc5b8\ud569\ub2c8\ub2e4.\uadf8\uac83\uc740<a href=\"https:\/\/adapty.io\/blog\/android-in-app-subscriptions-part-1\" target=\"_blank\" rel=\"noopener\">\uc774\uc804<\/a>\uc0ac\uc6a9\uc9c0\uce68\uc11c\uc5d0\uc11c \uc18c\uac1c\ud588\ub358 \ub17c\ub9ac\ub97c \uae30\ubc18\uc73c\ub85c \ud560 \uac83\uc785\ub2c8\ub2e4.<\/p>    <div class=\"wp-block-kevinbatdorf-code-block-pro\" data-code-block-pro-font-family=\"\" style=\"font-size:.875rem;line-height:1.25rem\"><span role=\"button\" tabindex=\"0\" data-code=\"private fun displayProducts() {    billingClientWrapper.queryProducts(object : BillingClientWrapper.OnQueryProductsListener {        override fun onSuccess(products: List&lt;SkuDetails&gt;&gt;) {            products.forEach { product -&gt;                purchaseButtonsMap[product.sku]?.apply {                    text = &quot;${product.description} for ${product.price}&quot;                    setOnClickListener {                        billingClientWrapper.purchase(this@PaywallActivity, product) \/\/will be declared below                    }                }            }        }         override fun onFailure(error: BillingClientWrapper.Error) {            \/\/handle error        }    }) }\" style=\"color:#d8dee9ff;display:none\" aria-label=\"Copy\" class=\"code-block-pro-copy-button\"><svg  style=\"width:24px;height:24px\" fill=\"none\" viewBox=\"0 0 24 24\" stroke=\"currentColor\" stroke-width=\"2\"><path class=\"with-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2m-6 9l2 2 4-4\"><\/path><path class=\"without-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2\"><\/path><\/svg><\/span><pre class=\"shiki nord\" style=\"background-color: #2e3440ff\"><code><span class=\"line\"><span style=\"color: #81A1C1\">private<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">fun<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #88C0D0\">displayProducts<\/span><span style=\"color: #ECEFF4\">()<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   billingClientWrapper<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">queryProducts<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #81A1C1\">object<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">BillingClientWrapper<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #8FBCBB\">OnQueryProductsListener<\/span><span style=\"color: #D8DEE9FF\"> {<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       override fun onSuccess<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9FF\">products<\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">List<\/span><span style=\"color: #81A1C1\">&lt;<\/span><span style=\"color: #8FBCBB\">SkuDetails<\/span><span style=\"color: #81A1C1\">&gt;&gt;<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> {<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">           products<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">forEach { product <\/span><span style=\"color: #81A1C1\">-&gt;<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">               purchaseButtonsMap[product<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">sku]<\/span><span style=\"color: #ECEFF4\">?.<\/span><span style=\"color: #D8DEE9FF\">apply {<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">                   text <\/span><span style=\"color: #81A1C1\">=<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">&quot;${<\/span><span style=\"color: #A3BE8C\">product<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #A3BE8C\">description<\/span><span style=\"color: #ECEFF4\">}<\/span><span style=\"color: #A3BE8C\"> for <\/span><span style=\"color: #ECEFF4\">${<\/span><span style=\"color: #A3BE8C\">product<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #A3BE8C\">price<\/span><span style=\"color: #ECEFF4\">}&quot;<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">                   setOnClickListener <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">                       billingClientWrapper<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">purchase<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #81A1C1\">this@PaywallActivity,<\/span><span style=\"color: #ECEFF4\"> <\/span><span style=\"color: #D8DEE9FF\">product<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #616E88\">\/\/will be declared below<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">                   <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">               }<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">           }<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       }<\/span><\/span> <span class=\"line\"><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #81A1C1\">override<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">fun<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #88C0D0\">onFailure<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9\">error<\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">BillingClientWrapper<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #8FBCBB\">Error<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">           <\/span><span style=\"color: #616E88\">\/\/handle error<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   }<\/span><span style=\"color: #ECEFF4\">)<\/span><\/span> <span class=\"line\"><span style=\"color: #ECEFF4\">}<\/span><\/span><\/code><\/pre><\/div>    <p>product.price\ub294\uacc4\uc815\uc758 \ud604\uc9c0 \ud1b5\ud654\ub97c \uba85\uc2dc\ud558\ub294 \ubb38\uc790\uc5f4\ub85c \ud615\uc2dd\uc774 \ubbf8\ub9ac\uc9c0\uc815\ub418\uc5b4 \uc788\uc2b5\ub2c8\ub2e4.\ucd94\uac00\uc11c\uc2dd\uc774 \ud544\uc694\ud558\uc9c0 \uc54a\uc2b5\ub2c8\ub2e4.<a href=\"https:\/\/developer.android.com\/reference\/com\/android\/billingclient\/api\/SkuDetails\" target=\"_blank\" rel=\"noopener nofollow\">SkuDetails<\/a>\ud074\ub798\uc2a4\uac1d\uccb4\uc758 \ub2e4\ub978 \ubaa8\ub4e0 \uc18d\uc131\ub3c4 \uc644\uc804\ud788 \ud604\uc9c0\ud654\ub418\uc5b4 \ub098\ud0c0\ub0a9\ub2c8\ub2e4.<\/p>    <h2 class=\"wp-block-heading\" id=\"%ea%b5%ac%eb%a7%a4%ec%a0%88%ec%b0%a8-%ec%8b%9c%ec%9e%91\">\uad6c\ub9e4\uc808\ucc28 \uc2dc\uc791<\/h2>    <p>\uad6c\ub9e4\ub97c\ucc98\ub9ac\ud558\ub824\uba74 \uc571\uc758 \uba54\uc778 \uc2a4\ub808\ub4dc\uc5d0\uc11c <a href=\"https:\/\/developer.android.com\/reference\/com\/android\/billingclient\/api\/BillingClient#launchBillingFlow(android.app.Activity,%20com.android.billingclient.api.BillingFlowParams)\" target=\"_blank\" rel=\"noopener nofollow\">launchBillingFlow()<\/a>\uba54\uc18c\ub4dc\ub97c\ubd88\ub7ec\uc640\uc57c \ud569\ub2c8\ub2e4.<\/p>    <p>\uc774\ub97c\uc704\ud574 BillingClientWrapper\uc5d0purchase()\uba54\uc18c\ub4dc\ub97c\ucd94\uac00\ud569\ub2c8\ub2e4.<\/p>    <div class=\"wp-block-kevinbatdorf-code-block-pro\" data-code-block-pro-font-family=\"\" style=\"font-size:.875rem;line-height:1.25rem\"><span role=\"button\" tabindex=\"0\" data-code=\"fun purchase(activity: Activity, product: SkuDetails) {    onConnected {        activity.runOnUiThread {            billingClient.launchBillingFlow(                activity,                BillingFlowParams.newBuilder().setSkuDetails(product).build()            )        }    } }\" style=\"color:#d8dee9ff;display:none\" aria-label=\"Copy\" class=\"code-block-pro-copy-button\"><svg  style=\"width:24px;height:24px\" fill=\"none\" viewBox=\"0 0 24 24\" stroke=\"currentColor\" stroke-width=\"2\"><path class=\"with-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2m-6 9l2 2 4-4\"><\/path><path class=\"without-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2\"><\/path><\/svg><\/span><pre class=\"shiki nord\" style=\"background-color: #2e3440ff\"><code><span class=\"line\"><span style=\"color: #81A1C1\">fun<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #88C0D0\">purchase<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9\">activity<\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">Activity<\/span><span style=\"color: #ECEFF4\">,<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #D8DEE9\">product<\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">SkuDetails<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   onConnected <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       activity<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">runOnUiThread <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">           billingClient<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">launchBillingFlow<\/span><span style=\"color: #ECEFF4\">(<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">               activity<\/span><span style=\"color: #ECEFF4\">,<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">               <\/span><span style=\"color: #8FBCBB\">BillingFlowParams<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">newBuilder<\/span><span style=\"color: #ECEFF4\">().<\/span><span style=\"color: #D8DEE9FF\">setSkuDetails<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9FF\">product<\/span><span style=\"color: #ECEFF4\">).<\/span><span style=\"color: #D8DEE9FF\">build<\/span><span style=\"color: #ECEFF4\">()<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">           <\/span><span style=\"color: #ECEFF4\">)<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><span style=\"color: #ECEFF4\">}<\/span><\/span><\/code><\/pre><\/div>    <p>launchBillingFlow()\uba54\uc18c\ub4dc\uc5d0\ub294\ucf5c\ubc31\uc774 \uc5c6\uc2b5\ub2c8\ub2e4.\uc751\ub2f5\uc740onPurchasesUpdated()\uba54\uc18c\ub4dc\ub85c\ubc18\ud658\ub429\ub2c8\ub2e4.<a href=\"https:\/\/adapty.io\/blog\/android-in-app-subscriptions-part-1\" target=\"_blank\" rel=\"noopener\">\uc774\uc804\uae30\uc0ac<\/a>\uc5d0\uc11c\uba54\uc18c\ub4dc\ub97c \uc120\uc5b8\ud558\uace0 \ub098\uc911\uc744 \uc704\ud574 \uc800\uc7a5\ud55c \uac83\uc744 \uae30\uc5b5\ud558\uc2dc\ub098\uc694?\uc774\uc81c\uadf8\uac83\uc744 \ud544\uc694\ub85c \ud569\ub2c8\ub2e4.<\/p>    <p>onPurchasesUpdated()\uba54\uc18c\ub4dc\ub294\uc0ac\uc6a9\uc790\uc640 \uad6c\ub9e4 \ub300\ud654 \uc0c1\uc790 \uac04\uc758 \uc0c1\ud638 \uc791\uc6a9 \uacb0\uacfc\uac00 \uc788\uc744\ub54c\ub9c8\ub2e4 \ud638\ucd9c\ub429\ub2c8\ub2e4.\uc131\uacf5\uc801\uc778\uad6c\ub9e4\uc77c \uc218\ub3c4 \uc788\uace0 \uc0ac\uc6a9\uc790\uac00 \ub300\ud654 \uc0c1\uc790\ub97c \ub2eb\uc544\uc11c \ubc1c\uc0dd\ud55c\uad6c\ub9e4 \ucde8\uc18c\uc77c \uc218\ub3c4 \uc788\ub294\ub370,\uc774\uacbd\uc6b0 <a href=\"https:\/\/developer.android.com\/reference\/com\/android\/billingclient\/api\/BillingClient.BillingResponseCode#USER_CANCELED\" target=\"_blank\" rel=\"noopener nofollow\">BillingResponseCode.<em>USER_CANCELED<\/em><\/a> \ucf54\ub4dc\ub97c\ubc1b\uac8c \ub429\ub2c8\ub2e4.\ub610\ub294\ub2e4\ub978 \uac00\ub2a5\ud55c \uc624\ub958 \uba54\uc2dc\uc9c0\uc77c \uc218 \uc788\uc2b5\ub2c8\ub2e4.<\/p>    <p>\uc774\uc804\uae30\uc0ac\uc758 OnQueryProductsListener\uc778\ud130\ud398\uc774\uc2a4\uc640\uc720\uc0ac\ud55c \ubc29\uc2dd\uc73c\ub85c,BillingClientWrapper \ud074\ub798\uc2a4\uc5d0\uc11cOnPurchaseListener\uc778\ud130\ud398\uc774\uc2a4\ub97c\uc120\uc5b8\ud558\uaca0\uc2b5\ub2c8\ub2e4.\ud574\ub2f9\uc778\ud130\ud398\uc774\uc2a4\ub97c \ud1b5\ud574 \uad6c\ub9e4 (<a href=\"https:\/\/developer.android.com\/reference\/com\/android\/billingclient\/api\/Purchase\" target=\"_blank\" rel=\"noopener nofollow\">Purchase<\/a>\ud074\ub798\uc2a4\uac1d\uccb4)\ub610\ub294<a href=\"https:\/\/adapty.io\/blog\/android-in-app-subscriptions\" target=\"_blank\" rel=\"noopener\">\uc774\uc804\uac00\uc774\ub4dc<\/a>\uc5d0\uc11c\uc120\uc5b8\ud55c \uc624\ub958 \uba54\uc2dc\uc9c0 \uc911 \ud558\ub098\ub97c \ubc1b\uac8c \ub429\ub2c8\ub2e4.\ub2e4\uc74c\uc2dc\uac04\uc5d0\ub294 \uad6c\ub9e4\uac00 \uc131\uacf5\ud558\ub354\ub77c\ub3c4 Purchase\ud074\ub798\uc2a4\uac1d\uccb4\uac00 \ubb34\ud6a8\ub85c \ub420 \uc218 \uc788\ub294 \uacbd\uc6b0\uc5d0 \ub300\ud574 \ub2e4\ub8f0 \uac83\uc785\ub2c8\ub2e4.<\/p>    <div class=\"wp-block-kevinbatdorf-code-block-pro\" data-code-block-pro-font-family=\"\" style=\"font-size:.875rem;line-height:1.25rem\"><span role=\"button\" tabindex=\"0\" data-code=\"interface OnPurchaseListener {    fun onPurchaseSuccess(purchase: Purchase?)    fun onPurchaseFailure(error: Error) }  var onPurchaseListener: OnPurchaseListener? = null\" style=\"color:#d8dee9ff;display:none\" aria-label=\"Copy\" class=\"code-block-pro-copy-button\"><svg  style=\"width:24px;height:24px\" fill=\"none\" viewBox=\"0 0 24 24\" stroke=\"currentColor\" stroke-width=\"2\"><path class=\"with-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2m-6 9l2 2 4-4\"><\/path><path class=\"without-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2\"><\/path><\/svg><\/span><pre class=\"shiki nord\" style=\"background-color: #2e3440ff\"><code><span class=\"line\"><span style=\"color: #81A1C1\">interface<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">OnPurchaseListener<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #81A1C1\">fun<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #88C0D0\">onPurchaseSuccess<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9\">purchase<\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">Purchase?<\/span><span style=\"color: #ECEFF4\">)<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #81A1C1\">fun<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #88C0D0\">onPurchaseFailure<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9\">error<\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">Error<\/span><span style=\"color: #ECEFF4\">)<\/span><\/span> <span class=\"line\"><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><\/span> <span class=\"line\"><span style=\"color: #81A1C1\">var<\/span><span style=\"color: #D8DEE9FF\"> onPurchaseListener<\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">OnPurchaseListener?<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">=<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">null<\/span><\/span><\/code><\/pre><\/div>    <p>\ub2e4\uc74c\uc73c\ub85cPaywallActivity\ub0b4\uc5d0\uc11c\uc774\ub97c \uad6c\ud604\ud569\ub2c8\ub2e4.<\/p>    <div class=\"wp-block-kevinbatdorf-code-block-pro\" data-code-block-pro-font-family=\"\" style=\"font-size:.875rem;line-height:1.25rem\"><span role=\"button\" tabindex=\"0\" data-code=\"class PaywallActivity: BaseActivity(), BillingClientWrapper.OnPurchaseListener {     @Inject    lateinit var billingClientWrapper: BillingClientWrapper     private val purchaseButtonsMap: Map&lt;String, Button&gt; by lazy(LazyThreadSafetyMode.NONE) {        mapOf(            &quot;premium_sub_month&quot; to monthlySubButton,            &quot;premium_sub_year&quot; to yearlySubButton,            &quot;coin_pack_large&quot; to coinPackLargeButton,            &quot;unlock_feature&quot; to unlockFeatureButton,        )    }     override fun onCreate(savedInstanceState: Bundle?) {        super.onCreate(savedInstanceState)        setContentView(R.layout.activity_paywall)         billingClientWrapper.onPurchaseListener = this         displayProducts()    }     override fun onPurchaseSuccess(purchase: Purchase?) {        \/\/handle successful purchase    }     override fun onPurchaseFailure(error: BillingClientWrapper.Error) {        \/\/handle error or user cancelation    }     private fun displayProducts() {        billingClientWrapper.queryProducts(object : BillingClientWrapper.OnQueryProductsListener {            override fun onSuccess(products: List&lt;SkuDetails&gt;) {                products.forEach { product -&gt;                    purchaseButtonsMap[product.sku]?.apply {                        text = &quot;${product.description} for ${product.price}&quot;                        setOnClickListener {                            billingClientWrapper.purchase(this@PaywallActivity, product)                        }                    }                }            }             override fun onFailure(error: BillingClientWrapper.Error) {                \/\/handle error            }        })    } }\" style=\"color:#d8dee9ff;display:none\" aria-label=\"Copy\" class=\"code-block-pro-copy-button\"><svg  style=\"width:24px;height:24px\" fill=\"none\" viewBox=\"0 0 24 24\" stroke=\"currentColor\" stroke-width=\"2\"><path class=\"with-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2m-6 9l2 2 4-4\"><\/path><path class=\"without-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2\"><\/path><\/svg><\/span><pre class=\"shiki nord\" style=\"background-color: #2e3440ff\"><code><span class=\"line\"><span style=\"color: #81A1C1\">class<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">PaywallActivity<\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB; font-weight: bold\">BaseActivity<\/span><span style=\"color: #ECEFF4\">(),<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">BillingClientWrapper<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #8FBCBB\">OnPurchaseListener<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #81A1C1\">@Inject<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   lateinit <\/span><span style=\"color: #81A1C1\">var<\/span><span style=\"color: #D8DEE9FF\"> billingClientWrapper<\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">BillingClientWrapper<\/span><\/span> <span class=\"line\"><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #81A1C1\">private<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">val<\/span><span style=\"color: #D8DEE9FF\"> purchaseButtonsMap<\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">Map<\/span><span style=\"color: #81A1C1\">&lt;<\/span><span style=\"color: #8FBCBB\">String<\/span><span style=\"color: #ECEFF4\">,<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">Button<\/span><span style=\"color: #81A1C1\">&gt;<\/span><span style=\"color: #D8DEE9FF\"> by lazy<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #8FBCBB\">LazyThreadSafetyMode<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #8FBCBB\">NONE<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #88C0D0\">mapOf<\/span><span style=\"color: #ECEFF4\">(<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">           <\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #A3BE8C\">premium_sub_month<\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #D8DEE9FF\"> to monthlySubButton<\/span><span style=\"color: #ECEFF4\">,<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">           <\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #A3BE8C\">premium_sub_year<\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #D8DEE9FF\"> to yearlySubButton<\/span><span style=\"color: #ECEFF4\">,<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">           <\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #A3BE8C\">coin_pack_large<\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #D8DEE9FF\"> to coinPackLargeButton<\/span><span style=\"color: #ECEFF4\">,<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">           <\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #A3BE8C\">unlock_feature<\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #D8DEE9FF\"> to unlockFeatureButton<\/span><span style=\"color: #ECEFF4\">,<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #ECEFF4\">)<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #81A1C1\">override<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">fun<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #88C0D0\">onCreate<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9\">savedInstanceState<\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">Bundle?<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #81A1C1\">super<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">onCreate<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9FF\">savedInstanceState<\/span><span style=\"color: #ECEFF4\">)<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       setContentView<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #8FBCBB\">R<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">layout<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">activity_paywall<\/span><span style=\"color: #ECEFF4\">)<\/span><\/span> <span class=\"line\"><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       billingClientWrapper<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">onPurchaseListener <\/span><span style=\"color: #81A1C1\">=<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">this<\/span><\/span> <span class=\"line\"><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       displayProducts<\/span><span style=\"color: #ECEFF4\">()<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #81A1C1\">override<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">fun<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #88C0D0\">onPurchaseSuccess<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9\">purchase<\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">Purchase?<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #616E88\">\/\/handle successful purchase<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #81A1C1\">override<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">fun<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #88C0D0\">onPurchaseFailure<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9\">error<\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">BillingClientWrapper<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #8FBCBB\">Error<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #616E88\">\/\/handle error or user cancelation<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #81A1C1\">private<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">fun<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #88C0D0\">displayProducts<\/span><span style=\"color: #ECEFF4\">()<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       billingClientWrapper<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">queryProducts<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #81A1C1\">object<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">BillingClientWrapper<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #8FBCBB\">OnQueryProductsListener<\/span><span style=\"color: #D8DEE9FF\"> {<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">           override fun onSuccess<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9FF\">products<\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">List<\/span><span style=\"color: #81A1C1\">&lt;<\/span><span style=\"color: #8FBCBB\">SkuDetails<\/span><span style=\"color: #81A1C1\">&gt;<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> {<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">               products<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">forEach { product <\/span><span style=\"color: #81A1C1\">-&gt;<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">                   purchaseButtonsMap[product<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">sku]<\/span><span style=\"color: #ECEFF4\">?.<\/span><span style=\"color: #D8DEE9FF\">apply {<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">                       text <\/span><span style=\"color: #81A1C1\">=<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">&quot;${<\/span><span style=\"color: #A3BE8C\">product<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #A3BE8C\">description<\/span><span style=\"color: #ECEFF4\">}<\/span><span style=\"color: #A3BE8C\"> for <\/span><span style=\"color: #ECEFF4\">${<\/span><span style=\"color: #A3BE8C\">product<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #A3BE8C\">price<\/span><span style=\"color: #ECEFF4\">}&quot;<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">                       setOnClickListener <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">                           billingClientWrapper<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">purchase<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #81A1C1\">this@PaywallActivity,<\/span><span style=\"color: #ECEFF4\"> <\/span><span style=\"color: #D8DEE9FF\">product<\/span><span style=\"color: #ECEFF4\">)<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">                       <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">                   }<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">               }<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">           }<\/span><\/span> <span class=\"line\"><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">           <\/span><span style=\"color: #81A1C1\">override<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">fun<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #88C0D0\">onFailure<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9\">error<\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">BillingClientWrapper<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #8FBCBB\">Error<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">               <\/span><span style=\"color: #616E88\">\/\/handle error<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">           <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       }<\/span><span style=\"color: #ECEFF4\">)<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><span style=\"color: #ECEFF4\">}<\/span><\/span><\/code><\/pre><\/div>    <p>onPurchaseUpdated()\uc5d0\uba87 \uac00\uc9c0 \ub17c\ub9ac\ub97c \ucd94\uac00\ud574 \ubd05\uc2dc\ub2e4.<\/p>    <div class=\"wp-block-kevinbatdorf-code-block-pro\" data-code-block-pro-font-family=\"\" style=\"font-size:.875rem;line-height:1.25rem\"><span role=\"button\" tabindex=\"0\" data-code=\"override fun onPurchasesUpdated(    billingResult: BillingResult,    purchaseList: MutableList&lt;Purchase&gt;? ) {    when (billingResult.responseCode) {        BillingClient.BillingResponseCode.OK -&gt; {            if (purchaseList == null) {                \/\/to be discussed in the next article                onPurchaseListener?.onPurchaseSuccess(null)                return            }             purchaseList.forEach(::processPurchase) \/\/to be declared below        }        else -&gt; {            \/\/error occured or user canceled            onPurchaseListener?.onPurchaseFailure(                BillingClientWrapper.Error(                    billingResult.responseCode,                    billingResult.debugMessage                )            )        }    } }\" style=\"color:#d8dee9ff;display:none\" aria-label=\"Copy\" class=\"code-block-pro-copy-button\"><svg  style=\"width:24px;height:24px\" fill=\"none\" viewBox=\"0 0 24 24\" stroke=\"currentColor\" stroke-width=\"2\"><path class=\"with-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2m-6 9l2 2 4-4\"><\/path><path class=\"without-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2\"><\/path><\/svg><\/span><pre class=\"shiki nord\" style=\"background-color: #2e3440ff\"><code><span class=\"line\"><span style=\"color: #81A1C1\">override<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">fun<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #88C0D0\">onPurchasesUpdated<\/span><span style=\"color: #ECEFF4\">(<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #D8DEE9\">billingResult<\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">BillingResult<\/span><span style=\"color: #ECEFF4\">,<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #D8DEE9\">purchaseList<\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">MutableList<\/span><span style=\"color: #81A1C1\">&lt;<\/span><span style=\"color: #8FBCBB\">Purchase<\/span><span style=\"color: #81A1C1\">&gt;<\/span><span style=\"color: #D8DEE9FF\">?<\/span><\/span> <span class=\"line\"><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #81A1C1\">when<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9FF\">billingResult<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">responseCode<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #8FBCBB\">BillingClient<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #8FBCBB\">BillingResponseCode<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #8FBCBB\">OK<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">-&gt;<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">           <\/span><span style=\"color: #81A1C1\">if<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9FF\">purchaseList <\/span><span style=\"color: #81A1C1\">==<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">null<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">               <\/span><span style=\"color: #616E88\">\/\/to be discussed in the next article<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">               on<\/span><span style=\"color: #8FBCBB\">PurchaseListener?<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">onPurchaseSuccess<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #81A1C1\">null<\/span><span style=\"color: #ECEFF4\">)<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">               <\/span><span style=\"color: #81A1C1\">return<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">           <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">           purchaseList<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">forEach<\/span><span style=\"color: #ECEFF4\">(::<\/span><span style=\"color: #D8DEE9FF\">processPurchase<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #616E88\">\/\/to be declared below<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #81A1C1\">else<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">-&gt;<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">           <\/span><span style=\"color: #616E88\">\/\/error occured or user canceled<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">           on<\/span><span style=\"color: #8FBCBB\">PurchaseListener?<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">onPurchaseFailure<\/span><span style=\"color: #ECEFF4\">(<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">               <\/span><span style=\"color: #8FBCBB\">BillingClientWrapper<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #8FBCBB\">Error<\/span><span style=\"color: #ECEFF4\">(<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">                   billingResult<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">responseCode<\/span><span style=\"color: #ECEFF4\">,<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">                   billingResult<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">debugMessage<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">               <\/span><span style=\"color: #ECEFF4\">)<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">           <\/span><span style=\"color: #ECEFF4\">)<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><span style=\"color: #ECEFF4\">}<\/span><\/span><\/code><\/pre><\/div>    <p>\ub9cc\uc77cpurchaseList\uac00\ube44\uc5b4 \uc788\uc9c0 \uc54a\uc73c\uba74,\uba3c\uc800purchaseState\uc774<a href=\"https:\/\/developer.android.com\/google\/play\/billing\/integrate#pending\" target=\"_blank\" rel=\"noopener nofollow\">PurchaseState.PURCHASED<\/a>\uc640\ub3d9\uc77c\ud55c \uc544\uc774\ud15c\uc744 \uace8\ub77c\ub0b4\uc57c \ud558\ub294\ub370,<a href=\"https:\/\/developer.android.com\/google\/play\/billing\/integrate#pending\" target=\"_blank\" rel=\"noopener nofollow\">\ubcf4\ub958\uc911<\/a>\uc778\uad6c\ub9e4\ub3c4 \uc788\uae30 \ub54c\ubb38\uc785\ub2c8\ub2e4.\uc774\ub7ec\ud55c\uacbd\uc6b0,\uc720\uc800\ud50c\ub85c\uc6b0\ub294 \uc5ec\uae30\uc5d0\uc11c \ub05d\ub0a9\ub2c8\ub2e4.<a href=\"https:\/\/developer.android.com\/google\/play\/billing\/integrate#process\" target=\"_blank\" rel=\"noopener nofollow\">\ubb38\uc11c<\/a>\uc5d0\ub530\ub974\uba74,\uc774\ub54c\uc5d0\ub294 \uc6b0\ub9ac \uc11c\ubc84\uc5d0\uc11c \uad6c\ub9e4\ub97c \uc778\uc99d\ud574\uc57c \ud569\ub2c8\ub2e4.\uc774\uc2dc\ub9ac\uc988\uc758 \ud6c4\uc18d \uae30\uc0ac\uc5d0\uc11c \uc774 \uc810\uc5d0 \ub300\ud574 \ub2e4\ub8f0 \uac83\uc785\ub2c8\ub2e4.\uc11c\ubc84\uc778\uc99d\uc774 \uc644\ub8cc\ub418\uba74 \ucf58\ud150\uce20\ub97c \uc804\ub2ec\ud558\uace0 Google\uc5d0\uc54c\ub824\uc57c \ud569\ub2c8\ub2e4.\ud6c4\uc790\ub300\ub85c\ud558\uc9c0 \uc54a\uc73c\uba74,\uad6c\ub9e4\ub2943\uc77c\ud6c4\uc5d0 \uc790\ub3d9\uc73c\ub85c \ud658\ubd88\ub429\ub2c8\ub2e4.\uc774\uc815\ucc45\uc774 GooglePlay\uc5d0\ub9cc\uc801\uc6a9\ub41c\ub2e4\ub294 \uc810\uc740 \ub9e4\uc6b0 \ud765\ubbf8\ub86d\uc2b5\ub2c8\ub2e4.iOS\ub294\uc720\uc0ac\ud55c \uc815\ucc45\uc744 \ubd80\uacfc\ud558\uc9c0 \uc54a\uc2b5\ub2c8\ub2e4.\uc0ac\uc6a9\uc790\uc5d0\uac8c\ucf58\ud150\uce20 \uc804\ub2ec\uc744 \uc2b9\uc778\ud558\ub294 \ubc29\ubc95\uc5d0\ub294 \ub450 \uac00\uc9c0\uac00 \uc788\uc2b5\ub2c8\ub2e4.<\/p>    <ul class=\"wp-block-list\"> <li>\ud074\ub77c\uc774\uc5b8\ud2b8 \uce21\uc5d0\uc11c <a href=\"https:\/\/developer.android.com\/reference\/com\/android\/billingclient\/api\/BillingClient#acknowledgepurchase\" target=\"_blank\" rel=\"noopener nofollow\">acknowledgePurchase()<\/a>\t\ub97c \ud1b5\ud558\uae30,\t<\/li>    <li>\ubc31\uc5d4\ub4dc \uce21\uc5d0\uc11c <a href=\"https:\/\/developers.google.com\/android-publisher\/api-ref\/purchases\/products\/acknowledge\" target=\"_blank\" rel=\"noopener nofollow\">Product.Purchases.Acknowledge<\/a>\/<a href=\"https:\/\/developers.google.com\/android-publisher\/api-ref\/purchases\/subscriptions\/acknowledge\" target=\"_blank\" rel=\"noopener nofollow\">Purchases.Subscriptions.Acknowledge<\/a> \ub97c \ud1b5\ud558\uae30.<\/li> <\/ul>    <p>\uc18c\ubaa8\uc131\uc81c\ud488\uc744 \ub2e4\ub8e8\ub294 \uacbd\uc6b0,\uc774\ub300\uc2e0 <a href=\"https:\/\/developer.android.com\/reference\/com\/android\/billingclient\/api\/BillingClient#consumeasync\" target=\"_blank\" rel=\"noopener nofollow\">consumeAsync()<\/a>\uba54\uc18c\ub4dc\ub97c\ubd88\ub7ec\uc640\uc57c \ud569\ub2c8\ub2e4.\uadf8\uac83\uc740\ub0b4\ubd80 \uad6c\ub9e4\ub97c \uc2b9\uc778\ud558\ub294 \ub3d9\uc2dc\uc5d0,\uc81c\ud488\uc744\ub2e4\uc2dc \uad6c\ub9e4\ud560 \uc218 \uc788\ub3c4\ub85d \ud569\ub2c8\ub2e4.\uc774\ub294\uacb0\uc81c \ub77c\uc774\ube0c\ub7ec\ub9ac\uc5d0\uc11c\ub9cc \uc218\ud589\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.\uc5b4\ub5a4\uc774\uc720\ub85c\uc778\uac00,Google Play \uac1c\ubc1c\uc790API\ub294\ubc31\uc5d4\ub4dc \uce21\uc5d0\uc11c \uc774 \uc791\uc5c5\uc744 \uc218\ud589\ud560 \uc218 \uc788\ub294 \ubc29\ubc95\uc744 \uc81c\uacf5\ud558\uc9c0\uc54a\uc2b5\ub2c8\ub2e4.Google Play\uc640\ub2ec\ub9ac AppStore\uc640AppGallery\ub294\uac01\uac01 AppStore Connect\uc640AppGalleryConnect\ub97c\ud1b5\ud574 \uc81c\ud488\uc744 \uc18c\ubaa8\ud488\uc73c\ub85c \uad6c\uc131\ud55c\ub2e4\ub294 \uc810\uc774 \ud765\ubbf8\ub86d\uc2b5\ub2c8\ub2e4.\uadf8\ub7ec\ub098\uc774\ub7ec\ud55c AppGallery\uc81c\ud488\ub3c4\uba85\uc2dc\uc801\uc778 \ubc29\uc2dd\uc73c\ub85c \uc18c\ube44\ub418\uc5b4\uc57c \ud569\ub2c8\ub2e4.<\/p>      <p>\uc790\uccb4\ubc31\uc5d4\ub4dc\ub97c \uc2e4\ud589 \uc911\uc778\uc9c0 \uc5ec\ubd80\ub97c \ubcf4\uace0\ud558\ub294 \ub450 \uac00\uc9c0 \ubc84\uc804\uc758processPurchase()\uba54\uc18c\ub4dc\ubfd0\ub9cc\uc544\ub2c8\ub77c,\uc2b9\uc778\ubc0f \uc18c\ube44 \uba54\uc18c\ub4dc\ub97c \uc791\uc131\ud574 \ubcf4\uaca0\uc2b5\ub2c8\ub2e4.<\/p>    <div class=\"wp-block-kevinbatdorf-code-block-pro\" data-code-block-pro-font-family=\"\" style=\"font-size:.875rem;line-height:1.25rem\"><span role=\"button\" tabindex=\"0\" data-code=\"private fun acknowledgePurchase(    purchase: Purchase,    callback: AcknowledgePurchaseResponseListener ) {    onConnected {        billingClient.acknowledgePurchase(            AcknowledgePurchaseParams.newBuilder().setPurchaseToken(purchase.purchaseToken)                .build(),            callback::onAcknowledgePurchaseResponse        )    } }  private fun consumePurchase(purchase: Purchase, callback: ConsumeResponseListener) {    onConnected {        billingClient.consumeAsync(            ConsumeParams.newBuilder().setPurchaseToken(purchase.purchaseToken).build()        ) { billingResult, purchaseToken -&gt;            callback.onConsumeResponse(billingResult, purchaseToken)        }    } }\" style=\"color:#d8dee9ff;display:none\" aria-label=\"Copy\" class=\"code-block-pro-copy-button\"><svg  style=\"width:24px;height:24px\" fill=\"none\" viewBox=\"0 0 24 24\" stroke=\"currentColor\" stroke-width=\"2\"><path class=\"with-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2m-6 9l2 2 4-4\"><\/path><path class=\"without-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2\"><\/path><\/svg><\/span><pre class=\"shiki nord\" style=\"background-color: #2e3440ff\"><code><span class=\"line\"><span style=\"color: #81A1C1\">private<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">fun<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #88C0D0\">acknowledgePurchase<\/span><span style=\"color: #ECEFF4\">(<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #D8DEE9\">purchase<\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">Purchase<\/span><span style=\"color: #ECEFF4\">,<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #D8DEE9\">callback<\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">AcknowledgePurchaseResponseListener<\/span><\/span> <span class=\"line\"><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   onConnected <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       billingClient<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">acknowledgePurchase<\/span><span style=\"color: #ECEFF4\">(<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">           <\/span><span style=\"color: #8FBCBB\">AcknowledgePurchaseParams<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">newBuilder<\/span><span style=\"color: #ECEFF4\">().<\/span><span style=\"color: #D8DEE9FF\">setPurchaseToken<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9FF\">purchase<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">purchaseToken<\/span><span style=\"color: #ECEFF4\">)<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">               <\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">build<\/span><span style=\"color: #ECEFF4\">(),<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">           <\/span><span style=\"color: #D8DEE9\">callback<\/span><span style=\"color: #ECEFF4\">::<\/span><span style=\"color: #D8DEE9FF\">onAcknowledgePurchaseResponse<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #ECEFF4\">)<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><\/span> <span class=\"line\"><span style=\"color: #81A1C1\">private<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">fun<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #88C0D0\">consumePurchase<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9\">purchase<\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">Purchase<\/span><span style=\"color: #ECEFF4\">,<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #D8DEE9\">callback<\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">ConsumeResponseListener<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   onConnected <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       billingClient<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">consumeAsync<\/span><span style=\"color: #ECEFF4\">(<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">           <\/span><span style=\"color: #8FBCBB\">ConsumeParams<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">newBuilder<\/span><span style=\"color: #ECEFF4\">().<\/span><span style=\"color: #D8DEE9FF\">setPurchaseToken<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9FF\">purchase<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">purchaseToken<\/span><span style=\"color: #ECEFF4\">).<\/span><span style=\"color: #D8DEE9FF\">build<\/span><span style=\"color: #ECEFF4\">()<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><span style=\"color: #D8DEE9FF\"> billingResult<\/span><span style=\"color: #ECEFF4\">,<\/span><span style=\"color: #D8DEE9FF\"> purchaseToken <\/span><span style=\"color: #81A1C1\">-&gt;<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">           callback<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">onConsumeResponse<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9FF\">billingResult<\/span><span style=\"color: #ECEFF4\">,<\/span><span style=\"color: #D8DEE9FF\"> purchaseToken<\/span><span style=\"color: #ECEFF4\">)<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><span style=\"color: #ECEFF4\">}<\/span><\/span><\/code><\/pre><\/div>    <p>\uc11c\ubc84\uc778\uc99d \ubd88\ud3ec\ud568:<\/p>    <div class=\"wp-block-kevinbatdorf-code-block-pro\" data-code-block-pro-font-family=\"\" style=\"font-size:.875rem;line-height:1.25rem\"><span role=\"button\" tabindex=\"0\" data-code=\"private fun processPurchase(purchase: Purchase) {    if (purchase.purchaseState == Purchase.PurchaseState.PURCHASED) {        onPurchaseListener?.onPurchaseSuccess(purchase)         if (purchase.skus.firstOrNull() == &quot;coin_pack_large&quot;) {            \/\/consuming our only consumable product            consumePurchase(purchase) { billingResult, purchaseToken -&gt;                if (billingResult.responseCode != BillingClient.BillingResponseCode.OK) {                    \/\/implement retry logic or try to consume again in onResume()                }            }        } else if (!purchase.isAcknowledged) {            acknowledgePurchase(purchase) { billingResult -&gt;                if (billingResult.responseCode != BillingClient.BillingResponseCode.OK) {                    \/\/implement retry logic or try to acknowledge again in onResume()                }            }        }    } }\" style=\"color:#d8dee9ff;display:none\" aria-label=\"Copy\" class=\"code-block-pro-copy-button\"><svg  style=\"width:24px;height:24px\" fill=\"none\" viewBox=\"0 0 24 24\" stroke=\"currentColor\" stroke-width=\"2\"><path class=\"with-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2m-6 9l2 2 4-4\"><\/path><path class=\"without-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2\"><\/path><\/svg><\/span><pre class=\"shiki nord\" style=\"background-color: #2e3440ff\"><code><span class=\"line\"><span style=\"color: #81A1C1\">private<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">fun<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #88C0D0\">processPurchase<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9\">purchase<\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">Purchase<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #81A1C1\">if<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9FF\">purchase<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">purchaseState <\/span><span style=\"color: #81A1C1\">==<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">Purchase<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #8FBCBB\">PurchaseState<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #8FBCBB\">PURCHASED<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       on<\/span><span style=\"color: #8FBCBB\">PurchaseListener?<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">onPurchaseSuccess<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9FF\">purchase<\/span><span style=\"color: #ECEFF4\">)<\/span><\/span> <span class=\"line\"><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #81A1C1\">if<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9FF\">purchase<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">skus<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">firstOrNull<\/span><span style=\"color: #ECEFF4\">()<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">==<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #A3BE8C\">coin_pack_large<\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">           <\/span><span style=\"color: #616E88\">\/\/consuming our only consumable product<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">           consumePurchase<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9FF\">purchase<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><span style=\"color: #D8DEE9FF\"> billingResult<\/span><span style=\"color: #ECEFF4\">,<\/span><span style=\"color: #D8DEE9FF\"> purchaseToken <\/span><span style=\"color: #81A1C1\">-&gt;<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">               <\/span><span style=\"color: #81A1C1\">if<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9FF\">billingResult<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">responseCode <\/span><span style=\"color: #81A1C1\">!=<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">BillingClient<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #8FBCBB\">BillingResponseCode<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #8FBCBB\">OK<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">                   <\/span><span style=\"color: #616E88\">\/\/implement retry logic or try to consume again in onResume()<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">               <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">           <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #ECEFF4\">}<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">else<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">if<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #81A1C1\">!<\/span><span style=\"color: #D8DEE9FF\">purchase<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">isAcknowledged<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">           acknowledgePurchase<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9FF\">purchase<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><span style=\"color: #D8DEE9FF\"> billingResult <\/span><span style=\"color: #81A1C1\">-&gt;<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">               <\/span><span style=\"color: #81A1C1\">if<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9FF\">billingResult<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">responseCode <\/span><span style=\"color: #81A1C1\">!=<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">BillingClient<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #8FBCBB\">BillingResponseCode<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #8FBCBB\">OK<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">                   <\/span><span style=\"color: #616E88\">\/\/implement retry logic or try to acknowledge again in onResume()<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">               <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">           <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><span style=\"color: #ECEFF4\">}<\/span><\/span><\/code><\/pre><\/div>    <p>\uc11c\ubc84\uc778\uc99d \ud3ec\ud568:<\/p>    <div class=\"wp-block-kevinbatdorf-code-block-pro\" data-code-block-pro-font-family=\"\" style=\"font-size:.875rem;line-height:1.25rem\"><span role=\"button\" tabindex=\"0\" data-code=\"private fun processPurchase(purchase: Purchase) {    if (purchase.purchaseState == Purchase.PurchaseState.PURCHASED) {        api.verifyPurchase(purchase.purchaseToken) { error -&gt;            if (error != null) {                onPurchaseListener?.onPurchaseSuccess(purchase)                 if (purchase.skus.firstOrNull() == &quot;coin_pack_large&quot;) {                    \/\/consuming our only consumable product                    billingClient.consumeAsync(                        ConsumeParams.newBuilder().setPurchaseToken(purchase.purchaseToken)                            .build()                    ) { billingResult, purchaseToken -&gt;                        if (billingResult.responseCode != BillingClient.BillingResponseCode.OK) {                            \/\/implement retry logic or try to consume again in onResume()                        }                    }                }            } else {                \/\/handle verification error            }        }    } }\" style=\"color:#d8dee9ff;display:none\" aria-label=\"Copy\" class=\"code-block-pro-copy-button\"><svg  style=\"width:24px;height:24px\" fill=\"none\" viewBox=\"0 0 24 24\" stroke=\"currentColor\" stroke-width=\"2\"><path class=\"with-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2m-6 9l2 2 4-4\"><\/path><path class=\"without-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2\"><\/path><\/svg><\/span><pre class=\"shiki nord\" style=\"background-color: #2e3440ff\"><code><span class=\"line\"><span style=\"color: #81A1C1\">private<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">fun<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #88C0D0\">processPurchase<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9\">purchase<\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">Purchase<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #81A1C1\">if<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9FF\">purchase<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">purchaseState <\/span><span style=\"color: #81A1C1\">==<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">Purchase<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #8FBCBB\">PurchaseState<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #8FBCBB\">PURCHASED<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       api<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">verifyPurchase<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9FF\">purchase<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">purchaseToken<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><span style=\"color: #D8DEE9FF\"> error <\/span><span style=\"color: #81A1C1\">-&gt;<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">           <\/span><span style=\"color: #81A1C1\">if<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9FF\">error <\/span><span style=\"color: #81A1C1\">!=<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">null<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">               on<\/span><span style=\"color: #8FBCBB\">PurchaseListener?<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">onPurchaseSuccess<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9FF\">purchase<\/span><span style=\"color: #ECEFF4\">)<\/span><\/span> <span class=\"line\"><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">               <\/span><span style=\"color: #81A1C1\">if<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9FF\">purchase<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">skus<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">firstOrNull<\/span><span style=\"color: #ECEFF4\">()<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">==<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #A3BE8C\">coin_pack_large<\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">                   <\/span><span style=\"color: #616E88\">\/\/consuming our only consumable product<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">                   billingClient<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">consumeAsync<\/span><span style=\"color: #ECEFF4\">(<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">                       <\/span><span style=\"color: #8FBCBB\">ConsumeParams<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">newBuilder<\/span><span style=\"color: #ECEFF4\">().<\/span><span style=\"color: #D8DEE9FF\">setPurchaseToken<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9FF\">purchase<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">purchaseToken<\/span><span style=\"color: #ECEFF4\">)<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">                           <\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">build<\/span><span style=\"color: #ECEFF4\">()<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">                   <\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><span style=\"color: #D8DEE9FF\"> billingResult<\/span><span style=\"color: #ECEFF4\">,<\/span><span style=\"color: #D8DEE9FF\"> purchaseToken <\/span><span style=\"color: #81A1C1\">-&gt;<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">                       <\/span><span style=\"color: #81A1C1\">if<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9FF\">billingResult<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">responseCode <\/span><span style=\"color: #81A1C1\">!=<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">BillingClient<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #8FBCBB\">BillingResponseCode<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #8FBCBB\">OK<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">                           <\/span><span style=\"color: #616E88\">\/\/implement retry logic or try to consume again in onResume()<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">                       <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">                   <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">               <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">           <\/span><span style=\"color: #ECEFF4\">}<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">else<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">               <\/span><span style=\"color: #616E88\">\/\/handle verification error<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">           <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><span style=\"color: #ECEFF4\">}<\/span><\/span><\/code><\/pre><\/div>    <p>\ub2e4\uc74c\uae30\uc0ac\uc5d0\uc11c\ub294 \uad6c\ub9e4\uc5d0 \ub300\ud55c \uc11c\ubc84 \uc778\uc99d\uc5d0 \ub300\ud574 \ub354 \uc790\uc138\ud788\ub2e4\ub8f0 \uac83\uc785\ub2c8\ub2e4.<\/p>    <p>\ubb3c\ub860,\ud074\ub77c\uc774\uc5b8\ud2b8\uce21\uc758 \ub450 \ubc88\uc9f8 \uc608\uc5d0\uc11c \uc2b9\uc778\uc744 \uad6c\ud604\ud560 \uc218\ub3c4 \uc788\uc2b5\ub2c8\ub2e4.\uadf8\ub7ec\ub098\ubc31\uc5d4\ub4dc\uc5d0\uc11c \ubb34\uc5b8\uac00\ub97c \ud560 \uc218 \uc788\ub294 \uacbd\uc6b0\ub77c\uba74,\uadf8\ub807\uac8c\ud574\uc57c \ud569\ub2c8\ub2e4.\uc2b9\uc778\ub610\ub294 \uc18c\ube44 \ud504\ub85c\uc138\uc2a4 \uc911 \ud558\ub098\uc5d0\uc11c \uc624\ub958\uac00 \ubc1c\uc0dd\ud558\uba74,\uc774\ub97c\ubb34\uc2dc\ud574\uc11c\ub294 \uc548 \ub429\ub2c8\ub2e4.\uad6c\ub9e4\uac00<a href=\"https:\/\/developer.android.com\/reference\/com\/android\/billingclient\/api\/Purchase.PurchaseState#PURCHASED\" target=\"_blank\" rel=\"noopener nofollow\">PurchaseState.<em>PURCHASED<\/em><\/a>\uc0c1\ud0dc\ub97c\uc218\uc2e0\ud55c \ud6c4 3\uc77c\uc774\ub0b4\uc5d0 \uc774\ub4e4 \uc911 \uc544\ubb34 \uac83\ub3c4 \uc2e4\ud589\ub418\uc9c0 \uc54a\uc740 \uacbd\uc6b0,\ucde8\uc18c\ubc0f \ud658\ubd88\ub429\ub2c8\ub2e4.\ub530\ub77c\uc11c\ubc31\uc5d4\ub4dc\uc5d0\uc11c \uc218\ud589\uc774 \ubd88\uac00\ub2a5\ud558\uace0 \uc5ec\ub7ec \ubc88 \uc2dc\ub3c4\ud55c \ud6c4\uc5d0\ub3c4\uc624\ub958\uac00 \uacc4\uc18d \ubc1c\uc0dd\ud558\ub294 \uacbd\uc6b0\uc5d0\ub294,\uc2e0\ub8b0\ud560\uc218 \uc788\ub294 \ucc28\uc120\ucc45\uc774 \uc788\uc2b5\ub2c8\ub2e4.\uc0ac\uc6a9\uc790\uc758\ud604\uc7ac \uad6c\ub9e4\ub97c <a href=\"https:\/\/developer.android.com\/reference\/androidx\/lifecycle\/Lifecycle.Event\" target=\"_blank\" rel=\"noopener nofollow\">onStart()\ub610\ub294onResume()<\/a>\uacfc\uac19\uc740 \uc218\uba85 \uc8fc\uae30 \uba54\uc18c\ub4dc\ub97c \ud1b5\ud574 \uac00\uc838\uc640\uc57c \ud558\uace0,\uc0ac\uc6a9\uc790\uac00\uc778\ud130\ub137\uc5d0 \uc5f0\uacb0\ub41c \uc0c1\ud0dc\uc5d0\uc11c 3\uc77c\uc774\ub0b4\uc5d0 \uc571\uc744 \uc2e4\ud589\ud558\uae30\ub97c \ubc14\ub77c\uba70 \uacc4\uc18d \uc2dc\ub3c4\ud569\ub2c8\ub2e4.:)<\/p>    <p>\ub530\ub77c\uc11cBillingClientWrapper\ud074\ub798\uc2a4\uc758\ud604\uc7ac \ubc84\uc804\uc740 \ub2e4\uc74c\uacfc \uac19\uc2b5\ub2c8\ub2e4.<\/p>    <div class=\"wp-block-kevinbatdorf-code-block-pro\" data-code-block-pro-font-family=\"\" style=\"font-size:.875rem;line-height:1.25rem\"><span role=\"button\" tabindex=\"0\" data-code=\"import android.app.Activity import android.content.Context import com.android.billingclient.api.*  class BillingClientWrapper(context: Context, private val api: Api) : PurchasesUpdatedListener {     interface OnQueryProductsListener {        fun onSuccess(products: List&lt;SkuDetails&gt;)        fun onFailure(error: Error)    }     interface OnPurchaseListener {        fun onPurchaseSuccess(purchase: Purchase?)        fun onPurchaseFailure(error: Error)    }     var onPurchaseListener: OnPurchaseListener? = null     class Error(val responseCode: Int, val debugMessage: String)     private val billingClient = BillingClient        .newBuilder(context)        .enablePendingPurchases()        .setListener(this)        .build()     fun purchase(activity: Activity, product: SkuDetails) {        onConnected {            activity.runOnUiThread {                billingClient.launchBillingFlow(                    activity,                    BillingFlowParams.newBuilder().setSkuDetails(product).build()                )            }        }    }     fun queryProducts(listener: OnQueryProductsListener) {        val skusList = listOf(&quot;premium_sub_month&quot;, &quot;premium_sub_year&quot;, &quot;coin_pack_large&quot;, &quot;unlock_feature&quot;)         queryProductsForType(            skusList,            BillingClient.SkuType.SUBS        ) { billingResult, skuDetailsList -&gt;            if (billingResult.responseCode == BillingClient.BillingResponseCode.OK) {                val products = skuDetailsList ?: mutableListOf()                queryProductsForType(                    skusList,                    BillingClient.SkuType.INAPP                ) { billingResult, skuDetailsList -&gt;                    if (billingResult.responseCode == BillingClient.BillingResponseCode.OK) {                        products.addAll(skuDetailsList ?: listOf())                        listener.onSuccess(products)                    } else {                        listener.onFailure(                            Error(billingResult.responseCode, billingResult.debugMessage)                        )                    }                }            } else {                listener.onFailure(                    Error(billingResult.responseCode, billingResult.debugMessage)                )            }        }    }     private fun queryProductsForType(        skusList: List&lt;String&gt;,        @BillingClient.SkuType type: String,        listener: SkuDetailsResponseListener    ) {        onConnected {            billingClient.querySkuDetailsAsync(                SkuDetailsParams.newBuilder().setSkusList(skusList).setType(type).build(),                listener            )        }    }     private fun onConnected(block: () -&gt; Unit) {        billingClient.startConnection(object : BillingClientStateListener {            override fun onBillingSetupFinished(billingResult: BillingResult) {                block()            }             override fun onBillingServiceDisconnected() {                \/\/ Try to restart the connection on the next request to                \/\/ Google Play by calling the startConnection() method.            }        })    }     override fun onPurchasesUpdated(        billingResult: BillingResult,        purchaseList: MutableList&lt;Purchase&gt;?    ) {        when (billingResult.responseCode) {            BillingClient.BillingResponseCode.OK -&gt; {                if (purchaseList == null) {                    \/\/to be discussed in the next article                    onPurchaseListener?.onPurchaseSuccess(null)                    return                }                 purchaseList.forEach(::processPurchase)            }            else -&gt; {                \/\/error occured or user canceled                onPurchaseListener?.onPurchaseFailure(                    BillingClientWrapper.Error(                        billingResult.responseCode,                        billingResult.debugMessage                    )                )            }        }    }     private fun processPurchase(purchase: Purchase) {        if (purchase.purchaseState == Purchase.PurchaseState.PURCHASED) {            api.verifyPurchase(purchase.purchaseToken) { error -&gt;                if (error != null) {                    onPurchaseListener?.onPurchaseSuccess(purchase)                     if (purchase.skus.firstOrNull() == &quot;coin_pack_large&quot;) {                        \/\/consuming our only consumable product                        billingClient.consumeAsync(                            ConsumeParams.newBuilder().setPurchaseToken(purchase.purchaseToken)                                .build()                        ) { billingResult, purchaseToken -&gt;                            if (billingResult.responseCode != BillingClient.BillingResponseCode.OK) {                                \/\/implement retry logic or try to consume again in onResume()                            }                        }                    }                } else {                    \/\/handle verification error                }            }        }    }     private fun acknowledgePurchase(        purchase: Purchase,        callback: AcknowledgePurchaseResponseListener    ) {        onConnected {            billingClient.acknowledgePurchase(                AcknowledgePurchaseParams.newBuilder().setPurchaseToken(purchase.purchaseToken)                    .build(),                callback::onAcknowledgePurchaseResponse            )        }    }     private fun consumePurchase(purchase: Purchase, callback: ConsumeResponseListener) {        onConnected {            billingClient.consumeAsync(                ConsumeParams.newBuilder().setPurchaseToken(purchase.purchaseToken).build()            ) { billingResult, purchaseToken -&gt;                callback.onConsumeResponse(billingResult, purchaseToken)            }        }    } }\" style=\"color:#d8dee9ff;display:none\" aria-label=\"Copy\" class=\"code-block-pro-copy-button\"><svg  style=\"width:24px;height:24px\" fill=\"none\" viewBox=\"0 0 24 24\" stroke=\"currentColor\" stroke-width=\"2\"><path class=\"with-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2m-6 9l2 2 4-4\"><\/path><path class=\"without-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2\"><\/path><\/svg><\/span><pre class=\"shiki nord\" style=\"background-color: #2e3440ff\"><code><span class=\"line\"><span style=\"color: #81A1C1\">import<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">android.app.Activity<\/span><\/span> <span class=\"line\"><span style=\"color: #81A1C1\">import<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">android.content.Context<\/span><\/span> <span class=\"line\"><span style=\"color: #81A1C1\">import<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">com.android.billingclient.api.*<\/span><\/span> <span class=\"line\"><\/span> <span class=\"line\"><span style=\"color: #81A1C1\">class<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">BillingClientWrapper<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9\">context<\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">Context<\/span><span style=\"color: #ECEFF4\">,<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">private<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">val<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #D8DEE9\">api<\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">Api<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB; font-weight: bold\">PurchasesUpdatedListener<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #81A1C1\">interface<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">OnQueryProductsListener<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #81A1C1\">fun<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #88C0D0\">onSuccess<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9\">products<\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">List<\/span><span style=\"color: #81A1C1\">&lt;<\/span><span style=\"color: #8FBCBB\">SkuDetails<\/span><span style=\"color: #81A1C1\">&gt;<\/span><span style=\"color: #ECEFF4\">)<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #81A1C1\">fun<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #88C0D0\">onFailure<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9\">error<\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">Error<\/span><span style=\"color: #ECEFF4\">)<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #81A1C1\">interface<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">OnPurchaseListener<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #81A1C1\">fun<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #88C0D0\">onPurchaseSuccess<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9\">purchase<\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">Purchase?<\/span><span style=\"color: #ECEFF4\">)<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #81A1C1\">fun<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #88C0D0\">onPurchaseFailure<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9\">error<\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">Error<\/span><span style=\"color: #ECEFF4\">)<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #81A1C1\">var<\/span><span style=\"color: #D8DEE9FF\"> onPurchaseListener<\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">OnPurchaseListener?<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">=<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">null<\/span><\/span> <span class=\"line\"><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #81A1C1\">class<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">Error<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #81A1C1\">val<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #D8DEE9\">responseCode<\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">Int<\/span><span style=\"color: #ECEFF4\">,<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">val<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #D8DEE9\">debugMessage<\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">String<\/span><span style=\"color: #ECEFF4\">)<\/span><\/span> <span class=\"line\"><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #81A1C1\">private<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">val<\/span><span style=\"color: #D8DEE9FF\"> billingClient <\/span><span style=\"color: #81A1C1\">=<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">BillingClient<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">newBuilder<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9FF\">context<\/span><span style=\"color: #ECEFF4\">)<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">enablePendingPurchases<\/span><span style=\"color: #ECEFF4\">()<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">setListener<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #81A1C1\">this<\/span><span style=\"color: #ECEFF4\">)<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">build<\/span><span style=\"color: #ECEFF4\">()<\/span><\/span> <span class=\"line\"><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #81A1C1\">fun<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #88C0D0\">purchase<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9\">activity<\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">Activity<\/span><span style=\"color: #ECEFF4\">,<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #D8DEE9\">product<\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">SkuDetails<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       onConnected <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">           activity<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">runOnUiThread <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">               billingClient<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">launchBillingFlow<\/span><span style=\"color: #ECEFF4\">(<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">                   activity<\/span><span style=\"color: #ECEFF4\">,<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">                   <\/span><span style=\"color: #8FBCBB\">BillingFlowParams<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">newBuilder<\/span><span style=\"color: #ECEFF4\">().<\/span><span style=\"color: #D8DEE9FF\">setSkuDetails<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9FF\">product<\/span><span style=\"color: #ECEFF4\">).<\/span><span style=\"color: #D8DEE9FF\">build<\/span><span style=\"color: #ECEFF4\">()<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">               <\/span><span style=\"color: #ECEFF4\">)<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">           <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #81A1C1\">fun<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #88C0D0\">queryProducts<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9\">listener<\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">OnQueryProductsListener<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #81A1C1\">val<\/span><span style=\"color: #D8DEE9FF\"> skusList <\/span><span style=\"color: #81A1C1\">=<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #88C0D0\">listOf<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #A3BE8C\">premium_sub_month<\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #ECEFF4\">,<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #A3BE8C\">premium_sub_year<\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #ECEFF4\">,<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #A3BE8C\">coin_pack_large<\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #ECEFF4\">,<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #A3BE8C\">unlock_feature<\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #ECEFF4\">)<\/span><\/span> <span class=\"line\"><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       queryProductsForType<\/span><span style=\"color: #ECEFF4\">(<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">           skusList<\/span><span style=\"color: #ECEFF4\">,<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">           <\/span><span style=\"color: #8FBCBB\">BillingClient<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #8FBCBB\">SkuType<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #8FBCBB\">SUBS<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><span style=\"color: #D8DEE9FF\"> billingResult<\/span><span style=\"color: #ECEFF4\">,<\/span><span style=\"color: #D8DEE9FF\"> skuDetailsList <\/span><span style=\"color: #81A1C1\">-&gt;<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">           <\/span><span style=\"color: #81A1C1\">if<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9FF\">billingResult<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">responseCode <\/span><span style=\"color: #81A1C1\">==<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">BillingClient<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #8FBCBB\">BillingResponseCode<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #8FBCBB\">OK<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">               <\/span><span style=\"color: #81A1C1\">val<\/span><span style=\"color: #D8DEE9FF\"> products <\/span><span style=\"color: #81A1C1\">=<\/span><span style=\"color: #D8DEE9FF\"> skuDetailsList <\/span><span style=\"color: #81A1C1\">?:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #88C0D0\">mutableListOf<\/span><span style=\"color: #ECEFF4\">()<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">               queryProductsForType<\/span><span style=\"color: #ECEFF4\">(<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">                   skusList<\/span><span style=\"color: #ECEFF4\">,<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">                   <\/span><span style=\"color: #8FBCBB\">BillingClient<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #8FBCBB\">SkuType<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #8FBCBB\">INAPP<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">               <\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><span style=\"color: #D8DEE9FF\"> billingResult<\/span><span style=\"color: #ECEFF4\">,<\/span><span style=\"color: #D8DEE9FF\"> skuDetailsList <\/span><span style=\"color: #81A1C1\">-&gt;<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">                   <\/span><span style=\"color: #81A1C1\">if<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9FF\">billingResult<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">responseCode <\/span><span style=\"color: #81A1C1\">==<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">BillingClient<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #8FBCBB\">BillingResponseCode<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #8FBCBB\">OK<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">                       products<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">addAll<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9FF\">skuDetailsList <\/span><span style=\"color: #81A1C1\">?:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #88C0D0\">listOf<\/span><span style=\"color: #ECEFF4\">())<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">                       listener<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">onSuccess<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9FF\">products<\/span><span style=\"color: #ECEFF4\">)<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">                   <\/span><span style=\"color: #ECEFF4\">}<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">else<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">                       listener<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">onFailure<\/span><span style=\"color: #ECEFF4\">(<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">                           <\/span><span style=\"color: #8FBCBB\">Error<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9FF\">billingResult<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">responseCode<\/span><span style=\"color: #ECEFF4\">,<\/span><span style=\"color: #D8DEE9FF\"> billingResult<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">debugMessage<\/span><span style=\"color: #ECEFF4\">)<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">                       <\/span><span style=\"color: #ECEFF4\">)<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">                   <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">               <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">           <\/span><span style=\"color: #ECEFF4\">}<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">else<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">               listener<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">onFailure<\/span><span style=\"color: #ECEFF4\">(<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">                   <\/span><span style=\"color: #8FBCBB\">Error<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9FF\">billingResult<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">responseCode<\/span><span style=\"color: #ECEFF4\">,<\/span><span style=\"color: #D8DEE9FF\"> billingResult<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">debugMessage<\/span><span style=\"color: #ECEFF4\">)<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">               <\/span><span style=\"color: #ECEFF4\">)<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">           <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #81A1C1\">private<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">fun<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #88C0D0\">queryProductsForType<\/span><span style=\"color: #ECEFF4\">(<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #D8DEE9\">skusList<\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">List<\/span><span style=\"color: #81A1C1\">&lt;<\/span><span style=\"color: #8FBCBB\">String<\/span><span style=\"color: #81A1C1\">&gt;<\/span><span style=\"color: #ECEFF4\">,<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #81A1C1\">@BillingClient.SkuType<\/span><span style=\"color: #ECEFF4\"> <\/span><span style=\"color: #D8DEE9\">type<\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">String<\/span><span style=\"color: #ECEFF4\">,<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #D8DEE9\">listener<\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">SkuDetailsResponseListener<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       onConnected <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">           billingClient<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">querySkuDetailsAsync<\/span><span style=\"color: #ECEFF4\">(<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">               <\/span><span style=\"color: #8FBCBB\">SkuDetailsParams<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">newBuilder<\/span><span style=\"color: #ECEFF4\">().<\/span><span style=\"color: #D8DEE9FF\">setSkusList<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9FF\">skusList<\/span><span style=\"color: #ECEFF4\">).<\/span><span style=\"color: #D8DEE9FF\">setType<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9FF\">type<\/span><span style=\"color: #ECEFF4\">).<\/span><span style=\"color: #D8DEE9FF\">build<\/span><span style=\"color: #ECEFF4\">(),<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">               listener<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">           <\/span><span style=\"color: #ECEFF4\">)<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #81A1C1\">private<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">fun<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #88C0D0\">onConnected<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9\">block<\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">()<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">-&gt;<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">Unit<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       billingClient<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">startConnection<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #81A1C1\">object<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">BillingClientStateListener<\/span><span style=\"color: #D8DEE9FF\"> {<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">           override fun onBillingSetupFinished<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9FF\">billingResult<\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">BillingResult<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> {<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">               block<\/span><span style=\"color: #ECEFF4\">()<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">           }<\/span><\/span> <span class=\"line\"><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">           override fun onBillingServiceDisconnected<\/span><span style=\"color: #ECEFF4\">()<\/span><span style=\"color: #D8DEE9FF\"> {<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">               <\/span><span style=\"color: #81A1C1\">\/\/<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">Try<\/span><span style=\"color: #D8DEE9FF\"> to restart the connection on the next request to<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">               <\/span><span style=\"color: #81A1C1\">\/\/<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">Google<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">Play<\/span><span style=\"color: #D8DEE9FF\"> by calling the startConnection<\/span><span style=\"color: #ECEFF4\">()<\/span><span style=\"color: #D8DEE9FF\"> method<\/span><span style=\"color: #ECEFF4\">.<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">           }<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       }<\/span><span style=\"color: #ECEFF4\">)<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #81A1C1\">override<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">fun<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #88C0D0\">onPurchasesUpdated<\/span><span style=\"color: #ECEFF4\">(<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #D8DEE9\">billingResult<\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">BillingResult<\/span><span style=\"color: #ECEFF4\">,<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #D8DEE9\">purchaseList<\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">MutableList<\/span><span style=\"color: #81A1C1\">&lt;<\/span><span style=\"color: #8FBCBB\">Purchase<\/span><span style=\"color: #81A1C1\">&gt;<\/span><span style=\"color: #D8DEE9FF\">?<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #81A1C1\">when<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9FF\">billingResult<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">responseCode<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">           <\/span><span style=\"color: #8FBCBB\">BillingClient<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #8FBCBB\">BillingResponseCode<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #8FBCBB\">OK<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">-&gt;<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">               <\/span><span style=\"color: #81A1C1\">if<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9FF\">purchaseList <\/span><span style=\"color: #81A1C1\">==<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">null<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">                   <\/span><span style=\"color: #616E88\">\/\/to be discussed in the next article<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">                   on<\/span><span style=\"color: #8FBCBB\">PurchaseListener?<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">onPurchaseSuccess<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #81A1C1\">null<\/span><span style=\"color: #ECEFF4\">)<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">                   <\/span><span style=\"color: #81A1C1\">return<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">               <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">               purchaseList<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">forEach<\/span><span style=\"color: #ECEFF4\">(::<\/span><span style=\"color: #D8DEE9FF\">processPurchase<\/span><span style=\"color: #ECEFF4\">)<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">           <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">           <\/span><span style=\"color: #81A1C1\">else<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">-&gt;<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">               <\/span><span style=\"color: #616E88\">\/\/error occured or user canceled<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">               on<\/span><span style=\"color: #8FBCBB\">PurchaseListener?<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">onPurchaseFailure<\/span><span style=\"color: #ECEFF4\">(<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">                   <\/span><span style=\"color: #8FBCBB\">BillingClientWrapper<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #8FBCBB\">Error<\/span><span style=\"color: #ECEFF4\">(<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">                       billingResult<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">responseCode<\/span><span style=\"color: #ECEFF4\">,<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">                       billingResult<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">debugMessage<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">                   <\/span><span style=\"color: #ECEFF4\">)<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">               <\/span><span style=\"color: #ECEFF4\">)<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">           <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #81A1C1\">private<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">fun<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #88C0D0\">processPurchase<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9\">purchase<\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">Purchase<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #81A1C1\">if<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9FF\">purchase<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">purchaseState <\/span><span style=\"color: #81A1C1\">==<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">Purchase<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #8FBCBB\">PurchaseState<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #8FBCBB\">PURCHASED<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">           api<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">verifyPurchase<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9FF\">purchase<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">purchaseToken<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><span style=\"color: #D8DEE9FF\"> error <\/span><span style=\"color: #81A1C1\">-&gt;<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">               <\/span><span style=\"color: #81A1C1\">if<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9FF\">error <\/span><span style=\"color: #81A1C1\">!=<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">null<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">                   on<\/span><span style=\"color: #8FBCBB\">PurchaseListener?<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">onPurchaseSuccess<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9FF\">purchase<\/span><span style=\"color: #ECEFF4\">)<\/span><\/span> <span class=\"line\"><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">                   <\/span><span style=\"color: #81A1C1\">if<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9FF\">purchase<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">skus<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">firstOrNull<\/span><span style=\"color: #ECEFF4\">()<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">==<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #A3BE8C\">coin_pack_large<\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">                       <\/span><span style=\"color: #616E88\">\/\/consuming our only consumable product<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">                       billingClient<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">consumeAsync<\/span><span style=\"color: #ECEFF4\">(<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">                           <\/span><span style=\"color: #8FBCBB\">ConsumeParams<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">newBuilder<\/span><span style=\"color: #ECEFF4\">().<\/span><span style=\"color: #D8DEE9FF\">setPurchaseToken<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9FF\">purchase<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">purchaseToken<\/span><span style=\"color: #ECEFF4\">)<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">                               <\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">build<\/span><span style=\"color: #ECEFF4\">()<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">                       <\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><span style=\"color: #D8DEE9FF\"> billingResult<\/span><span style=\"color: #ECEFF4\">,<\/span><span style=\"color: #D8DEE9FF\"> purchaseToken <\/span><span style=\"color: #81A1C1\">-&gt;<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">                           <\/span><span style=\"color: #81A1C1\">if<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9FF\">billingResult<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">responseCode <\/span><span style=\"color: #81A1C1\">!=<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">BillingClient<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #8FBCBB\">BillingResponseCode<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #8FBCBB\">OK<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">                               <\/span><span style=\"color: #616E88\">\/\/implement retry logic or try to consume again in onResume()<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">                           <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">                       <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">                   <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">               <\/span><span style=\"color: #ECEFF4\">}<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">else<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">                   <\/span><span style=\"color: #616E88\">\/\/handle verification error<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">               <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">           <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #81A1C1\">private<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">fun<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #88C0D0\">acknowledgePurchase<\/span><span style=\"color: #ECEFF4\">(<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #D8DEE9\">purchase<\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">Purchase<\/span><span style=\"color: #ECEFF4\">,<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #D8DEE9\">callback<\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">AcknowledgePurchaseResponseListener<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       onConnected <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">           billingClient<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">acknowledgePurchase<\/span><span style=\"color: #ECEFF4\">(<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">               <\/span><span style=\"color: #8FBCBB\">AcknowledgePurchaseParams<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">newBuilder<\/span><span style=\"color: #ECEFF4\">().<\/span><span style=\"color: #D8DEE9FF\">setPurchaseToken<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9FF\">purchase<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">purchaseToken<\/span><span style=\"color: #ECEFF4\">)<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">                   <\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">build<\/span><span style=\"color: #ECEFF4\">(),<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">               <\/span><span style=\"color: #D8DEE9\">callback<\/span><span style=\"color: #ECEFF4\">::<\/span><span style=\"color: #D8DEE9FF\">onAcknowledgePurchaseResponse<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">           <\/span><span style=\"color: #ECEFF4\">)<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #81A1C1\">private<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">fun<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #88C0D0\">consumePurchase<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9\">purchase<\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">Purchase<\/span><span style=\"color: #ECEFF4\">,<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #D8DEE9\">callback<\/span><span style=\"color: #81A1C1\">:<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #8FBCBB\">ConsumeResponseListener<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       onConnected <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">           billingClient<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">consumeAsync<\/span><span style=\"color: #ECEFF4\">(<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">               <\/span><span style=\"color: #8FBCBB\">ConsumeParams<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">newBuilder<\/span><span style=\"color: #ECEFF4\">().<\/span><span style=\"color: #D8DEE9FF\">setPurchaseToken<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9FF\">purchase<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">purchaseToken<\/span><span style=\"color: #ECEFF4\">).<\/span><span style=\"color: #D8DEE9FF\">build<\/span><span style=\"color: #ECEFF4\">()<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">           <\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><span style=\"color: #D8DEE9FF\"> billingResult<\/span><span style=\"color: #ECEFF4\">,<\/span><span style=\"color: #D8DEE9FF\"> purchaseToken <\/span><span style=\"color: #81A1C1\">-&gt;<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">               callback<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">onConsumeResponse<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9FF\">billingResult<\/span><span style=\"color: #ECEFF4\">,<\/span><span style=\"color: #D8DEE9FF\"> purchaseToken<\/span><span style=\"color: #ECEFF4\">)<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">           <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span> <span class=\"line\"><span style=\"color: #ECEFF4\">}<\/span><\/span><\/code><\/pre><\/div>    <p>\uc0ac\uc6a9\uc790\uac00\uc774\ubbf8 \uad6c\ub9e4\ud588\ub294\uc9c0 \uc5ec\ubd80\uc5d0 \uad00\uacc4\uc5c6\uc774,\ubaa8\ub4e0\uc81c\ud488\uc5d0 \ub300\ud574 \ubc84\ud2bc\uc774 \ud65c\uc131\ud654\ub41c \uc774\uc720\uac00 \uad81\uae08\ud560 \uc218 \uc788\uc2b5\ub2c8\ub2e4.\ub610\ub294\ub450 \uad6c\ub3c5\uc744 \ubaa8\ub450 \uad6c\uc785\ud558\uba74 \uc5b4\ub5bb\uac8c \ub418\ub294\uc9c0\uc5d0 \ub300\ud574 \uc9c8\ubb38\uc774\uc788\uc744 \uc218 \uc788\uc2b5\ub2c8\ub2e4.\uccab\ubc88\uc9f8 \uad6c\ub3c5\uc774 \ub450 \ubc88\uc9f8 \uad6c\ub3c5\uc744 \ub300\uccb4\ud569\ub2c8\uae4c,\uc544\ub2c8\uba74\ub458 \ub2e4 \uc720\uc9c0\ub429\ub2c8\uae4c?\ub2e4\uc74c\uae30\uc0ac\uc5d0\uc11c \ubaa8\ub450 \ub2f5\ud574\ub4dc\ub9bd\ub2c8\ub2e4.:)<\/p> 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Adapty\uc758 \ud29c\ud1a0\ub9ac\uc5bc.<\/p>\n","protected":false},"author":43,"featured_media":143566,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1004],"tags":[],"page-builder":[],"class_list":["post-138012","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-tutorial-ko"],"acf":[],"_links":{"self":[{"href":"https:\/\/adapty.io\/ko\/wp-json\/wp\/v2\/posts\/138012","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/adapty.io\/ko\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/adapty.io\/ko\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/adapty.io\/ko\/wp-json\/wp\/v2\/users\/43"}],"replies":[{"embeddable":true,"href":"https:\/\/adapty.io\/ko\/wp-json\/wp\/v2\/comments?post=138012"}],"version-history":[{"count":0,"href":"https:\/\/adapty.io\/ko\/wp-json\/wp\/v2\/posts\/138012\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/adapty.io\/ko\/wp-json\/wp\/v2\/media\/143566"}],"wp:attachment":[{"href":"https:\/\/adapty.io\/ko\/wp-json\/wp\/v2\/media?parent=138012"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/adapty.io\/ko\/wp-json\/wp\/v2\/categories?post=138012"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/adapty.io\/ko\/wp-json\/wp\/v2\/tags?post=138012"},{"taxonomy":"page-builder","embeddable":true,"href":"https:\/\/adapty.io\/ko\/wp-json\/wp\/v2\/page-builder?post=138012"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}