{"id":137968,"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-2-2\/"},"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\/zh\/blog\/android-in-app-purchases-google-play-billing-library-part-2\/","title":{"rendered":"\u5b89\u5353\u5e94\u7528\u5185\u8d2d\u4e70\uff0c\u7b2c2\u90e8\u5206\uff1a\u4f7f\u7528Google Play Billing Library\u5904\u7406\u8d2d\u4e70"},"content":{"rendered":" <p>\u5728\u4e0a\u4e00\u7bc7\u6587\u7ae0\u4e2d\uff0c\u6211\u4eec\u521b\u5efa\u4e86\u4e00\u4e2a\u5305\u88c5\u5668\u7c7b\u6765\u4e0eBilling Library\u4e00\u8d77\u5de5\u4f5c\uff1a<\/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>\u8ba9\u6211\u4eec\u7ee7\u7eed\u5b9e\u73b0\u8d2d\u4e70\u548c\u6539\u8fdb\u6211\u4eec\u7684\u7c7b\u3002<\/p>      <h2 class=\"wp-block-heading\" id=\"%e8%ae%be%e8%ae%a1%e8%ae%a2%e9%98%85%e5%b1%8f\">\u8bbe\u8ba1\u8ba2\u9605\u5c4f<\/h2>    <p>\u4efb\u4f55\u6709\u5e94\u7528\u5185\u90e8\u8d2d\u4e70\u529f\u80fd\u7684\u5e94\u7528\uff08APP\uff09\u90fd\u6709\u4e00\u4e2a\u4ed8\u8d39\u5899\uff08paywall\uff09\u5c4f\u5e55\u3002<a href=\"https:\/\/support.google.com\/googleplay\/android-developer\/answer\/9900533\" target=\"_blank\" rel=\"noopener nofollow\">Google\u7b56\u7565<\/a>\u5b9a\u4e49\u4e86\u6b64\u7c7b\u5c4f\u4e2d\u5fc5\u987b\u51fa\u73b0\u7684\u6700\u57fa\u672c\u5143\u7d20\u548c\u8bf4\u660e\u6587\u672c\u3002\u603b\u7ed3\u5982\u4e0b\u3002\u5728\u201c\u4ed8\u8d39\u5899\u201d\u5c4f\u5e55\u4e0a\uff0c\u60a8\u5fc5\u987b\u660e\u786e\u8bf4\u660e\u60a8\u7684\u8ba2\u9605\u6761\u4ef6\u3001\u8d39\u7528\u548c\u6301\u7eed\u65f6\u95f4\uff0c\u5e76\u6307\u5b9a\u662f\u5426\u9700\u8981\u8ba2\u9605\u624d\u80fd\u4f7f\u7528\u5e94\u7528\u7a0b\u5e8f\u3002\u60a8\u8fd8\u5fc5\u987b\u907f\u514d\u5f3a\u8feb\u7528\u6237\u6267\u884c\u4efb\u4f55\u989d\u5916\u64cd\u4f5c\u6765\u68c0\u67e5\u6761\u4ef6\u3002&nbsp;<\/p>    <p>\u8fd9\u91cc\uff0c\u6211\u4eec\u5c06\u4f7f\u7528\u4e00\u4e2a\u7b80\u5316\u7684\u4ed8\u8d39\u5899\u5c4f\u5e55\u4f5c\u4e3a\u4f8b\u5b50\uff1a<\/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\/631abc67c79cf6614ff8de49_3321-1.png\" alt=\"\" width=\"203\" height=\"428\"><figcaption class=\"wp-element-caption\"><em>\u5b89\u5353\u793a\u4f8b\u4ed8\u8d39\u5899<\/em><\/figcaption><\/figure><\/div>   <p>\u200d<\/p>    <p>\u6211\u4eec\u5728\u4ed8\u8d39\u5899\u5c4f\u5e55\u4e0a\u6709\u4ee5\u4e0b\u5143\u7d20\uff1a<\/p>    <ul class=\"wp-block-list\"> <li>\u6807\u9898\u3002<\/li>    <li>\u8bbe\u7f6e\u4e3a\u542f\u52a8\u8d2d\u4e70\u6d41\u7a0b\u7684\u6309\u94ae\u3002\u8fd9\u4e9b\u6309\u94ae\u6307\u5bfc\u7528\u6237\u4e86\u89e3\u8ba2\u9605\u9009\u9879\u7684\u4e00\u822c\u8be6\u7ec6\u4fe1\u606f\uff08\u4f8b\u5982\u6807\u9898\u548c\u8d39\u7528\uff09\uff0c\u8fd9\u4e9b\u4fe1\u606f\u662f\u4ee5\u5f53\u5730\u8d27\u5e01\u663e\u793a\u7684\u3002<\/li>    <li>\u6307\u793a\u6587\u672c\u3002&nbsp;<\/li>    <li>\u53ef\u4ee5\u6062\u590d\u5148\u524d\u8d2d\u4e70\u7684\u6309\u94ae\u3002\u8fd9\u4e00\u5143\u7d20\u5bf9\u4e8e\u4efb\u4f55\u5177\u6709\u8ba2\u9605\u6216\u975e\u6d88\u8017\u6027\u8d2d\u4e70\u529f\u80fd\u7684\u5e94\u7528\u7a0b\u5e8f\u6765\u8bf4\u90fd\u662f\u5fc5\u987b\u7684\u3002<\/li> <\/ul>    <p>\u8c03\u6574\u4ee3\u7801\u4ee5\u663e\u793a\u4ea7\u54c1\u7ec6\u8282<\/p>    <p>\u5728\u6211\u4eec\u7684\u793a\u4f8b\u4e2d\u6709\u56db\u4e2a\u4ea7\u54c1\uff1a<\/p>    <ul class=\"wp-block-list\"> <li>\u4e24\u6b21\u81ea\u52a8\u7eed\u8ba2\u670d\u52a1\uff08\u201cpremium_sub_month\u201d\u548c\u201cpremium_sub_year\u201d\uff09\uff1b<\/li>    <li>\u4e0d\u53ef\u8d2d\u4e70\u4e24\u6b21\u7684\u4ea7\u54c1\uff0c\u6216\u975e\u6d88\u8017\u54c1\u4ea7\u54c1\uff08\u201cunlock_feature\u201d\uff09\uff1b<\/li>    <li>\u53ef\u4ee5\u591a\u6b21\u8d2d\u4e70\u7684\u4ea7\u54c1\uff0c\u6216\u8005\u6d88\u8017\u6027\u4ea7\u54c1\uff08\u201ccoin_pack_large\u201d\uff09\u3002<\/li> <\/ul>    <p>\u4e3a\u4e86\u7b80\u5316\u8fd9\u4e2a\u4f8b\u5b50\uff0c\u6211\u4eec\u5c06\u4f7f\u7528\u4e00\u4e2aActivity\uff08\u901a\u8fc7\u5728\u4e0a\u4e00\u7bc7\u6587\u7ae0\u4e2d\u6240\u521b\u5efa\u7684BillingClientWrapper\u6ce8\u5165\uff09\uff0c\u4ee5\u53ca\u4e00\u4e2a\u5e26\u6709\u56fa\u5b9a\u6570\u91cf\u8d2d\u4e70\u6309\u94ae\u7684\u5e03\u5c40\u3002<\/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>\u4e3a\u4e86\u65b9\u4fbf\u8d77\u89c1\uff0c\u6211\u4eec\u5c06\u6dfb\u52a0\u4e00\u4e2a\u6620\u5c04\uff0c\u5176\u4e2d\u5bc6\u94a5\u662f\u4ea7\u54c1\u7684<a href=\"https:\/\/developer.android.com\/reference\/com\/android\/billingclient\/api\/SkuDetails#getSku()\" target=\"_blank\" rel=\"noopener nofollow\">sku<\/a>\uff0c\u8be5\u503c\u4e3a\u5c4f\u5e55\u4e0a\u5bf9\u5e94\u7684\u6309\u94ae\u3002<\/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>\u8ba9\u6211\u4eec\u58f0\u660e\u4e00\u4e2a\u65b9\u6cd5\u6765\u5728\u7528\u6237\u754c\u9762\u4e2d\u663e\u793a\u4ea7\u54c1\uff0c\u5b83\u5c06\u57fa\u4e8e\u6211\u4eec<a href=\"https:\/\/adapty.io\/blog\/android-in-app-subscriptions-part-1\" target=\"_blank\" rel=\"noopener\">\u4e4b\u524d<\/a>\u6559\u7a0b\u4e2d\u4ecb\u7ecd\u7684\u903b\u8f91\u3002<\/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\u662f\u4e00\u4e2a\u5df2\u7ecf\u683c\u5f0f\u5316\u7684\u5b57\u7b26\u4e32\uff0c\u7528\u4e8e\u6307\u5b9a\u8d26\u6237\u7684\u672c\u5730\u8d27\u5e01\u3002\u5b83\u4e0d\u9700\u8981\u4efb\u4f55\u989d\u5916\u683c\u5f0f\u3002<a href=\"https:\/\/developer.android.com\/reference\/com\/android\/billingclient\/api\/SkuDetails\" rel=\"nofollow noopener\" target=\"_blank\">SkuDetails<\/a>\u7c7b\u5bf9\u8c61\u7684\u6240\u6709\u5176\u4ed6\u5c5e\u6027\u4e5f\u5b8c\u5168\u672c\u5730\u5316\u4e86\u3002<\/p>    <h2 class=\"wp-block-heading\" id=\"%e5%bc%80%e5%a7%8b%e8%b4%ad%e4%b9%b0%e8%bf%87%e7%a8%8b\">\u5f00\u59cb\u8d2d\u4e70\u8fc7\u7a0b<\/h2>    <p>\u5728\u8d2d\u4e70\u8fc7\u7a0b\u4e2d\uff0c\u6211\u4eec\u5fc5\u987b\u4ece\u5e94\u7528\u7a0b\u5e8f\u7684\u4e3b\u7ebf\u7a0b\u8c03\u7528<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>\u65b9\u6cd5\u3002<\/p>    <p>\u4e3a\u6b64\uff0c\u6211\u4eec\u5c06\u5411BillingClientWrapper\u6dfb\u52a0\u4e00\u4e2apurchase()\u65b9\u6cd5\u3002&nbsp;<\/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()\u65b9\u6cd5\u6ca1\u6709\u56de\u8c03\u3002\u54cd\u5e94\u5c06\u8fd4\u56de\u5230onPurchasesUpdated()\u65b9\u6cd5\u3002\u60a8\u8fd8\u8bb0\u5f97\u6211\u4eec\u5728<a href=\"https:\/\/adapty.io\/blog\/android-in-app-subscriptions-part-1\" target=\"_blank\" rel=\"noopener\">\u524d\u4e00\u7bc7\u6587\u7ae0<\/a>\u4e2d\u58f0\u660e\u4e86\u8fd9\u4e2a\uff0c\u7136\u540e\u51c6\u5907\u7559\u7740\u4ee5\u540e\u518d\u7528\u5417\uff1f\u90a3\u6211\u4eec\u73b0\u5728\u5c31\u5230\u4e86\u9700\u8981\u7684\u65f6\u5019\u4e86\u3002<\/p>    <p>\u6bcf\u5f53\u7528\u6237\u4e0e\u8d2d\u4e70\u5bf9\u8bdd\u6846\u7684\u4ea4\u4e92\u4ea7\u751f\u4efb\u4f55\u7ed3\u679c\u65f6\uff0conPurchasesUpdated()\u65b9\u6cd5\u5c31\u4f1a\u88ab\u8c03\u7528\u3002\u8fd9\u53ef\u4ee5\u662f\u4e00\u6b21\u6210\u529f\u7684\u8d2d\u4e70\uff0c\u4e5f\u53ef\u4ee5\u662f\u7528\u6237\u5173\u95ed\u5bf9\u8bdd\u6846\u5bfc\u81f4\u7684\u8d2d\u4e70\u53d6\u6d88\uff0c\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u6211\u4eec\u5c06\u5f97\u5230<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>\u4ee3\u7801\u3002\u6216\u8005\uff0c\u5b83\u4e5f\u53ef\u4ee5\u662f\u4efb\u4f55\u5176\u4ed6\u53ef\u80fd\u7684\u9519\u8bef\u6d88\u606f\u3002<\/p>    <p>\u4e0e\u4e0a\u4e00\u7bc7\u6587\u7ae0\u4e2d\u7684OnQueryProductsListener\u63a5\u53e3\u7c7b\u4f3c\uff0c\u6211\u4eec\u5c06\u5728BillingClientWrapper\u7c7b\u4e2d\u58f0\u660e\u4e00\u4e2aOnPurchaseListener\u63a5\u53e3\u3002\u901a\u8fc7\u8be5\u63a5\u53e3\uff0c\u6211\u4eec\u5c06\u63a5\u6536\u8d2d\u4e70\uff08\u4e00\u4e2a<a href=\"https:\/\/developer.android.com\/reference\/com\/android\/billingclient\/api\/Purchase\" target=\"_blank\" rel=\"noopener nofollow\">Purchase<\/a>\u7c7b\u5bf9\u8c61\uff09\u6d88\u606f\u6216\u6211\u4eec\u5728<a href=\"https:\/\/adapty.io\/blog\/android-in-app-subscriptions\" target=\"_blank\" rel=\"noopener\">\u4e0a\u4e00\u7bc7\u6307\u5357<\/a>\u4e2d\u58f0\u660e\u7684\u9519\u8bef\u6d88\u606f\u3002\u5728\u4e0b\u4e00\u4e2a\u793a\u4f8b\u4e2d\uff0c\u6211\u4eec\u5c06\u8ba8\u8bba\u5373\u4f7f\u8d2d\u4e70\u6210\u529f\uff0cPurchase\u7c7b\u5bf9\u8c61\u4e5f\u53ef\u4ee5\u4e3anull\u7684\u60c5\u51b5\u3002<\/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>\u63a5\u4e0b\u6765\uff0c\u6211\u4eec\u5c06\u5728PaywallActivity\u4e2d\u5b9e\u73b0\u5b83\uff1a<\/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>\u8ba9\u6211\u4eec\u6dfb\u52a0\u4e00\u4e9b\u903b\u8f91\u5230onPurchaseUpdated()\uff1a<\/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>\u5982\u679cpurchaseList\u4e0d\u662f\u7a7a\u7684\uff0c\u6211\u4eec\u9996\u5148\u5fc5\u987b\u6311\u9009\u51fa\u90a3\u4e9bpurchaseState\u7b49\u4e8e<a href=\"https:\/\/developer.android.com\/google\/play\/billing\/integrate#pending\" target=\"_blank\" rel=\"noopener nofollow\">PurchaseState.PURCHASED<\/a>\u7684\u6761\u76ee\uff0c\u56e0\u4e3a\u8fd8\u6709<a href=\"https:\/\/developer.android.com\/google\/play\/billing\/integrate#pending\" target=\"_blank\" rel=\"noopener nofollow\">\u5f85\u5b9a<\/a>\u8d2d\u4e70\u3002\u5982\u679c\u662f\u8fd9\u79cd\u60c5\u51b5\uff0c\u90a3\u7528\u6237\u6d41\u5230\u6b64\u7ed3\u675f\u3002\u6839\u636e<a href=\"https:\/\/developer.android.com\/google\/play\/billing\/integrate#process\" target=\"_blank\" rel=\"noopener nofollow\">\u6587\u4ef6<\/a>\uff0c\u6211\u4eec\u5e94\u8be5\u5728\u6211\u4eec\u7684\u670d\u52a1\u5668\u4e0a\u9a8c\u8bc1\u8d2d\u4e70\u3002\u6211\u4eec\u5c06\u5728\u672c\u7cfb\u5217\u63a5\u4e0b\u6765\u7684\u6587\u7ae0\u4e2d\u8ba8\u8bba\u8fd9\u4e2a\u95ee\u9898\u3002\u4e00\u65e6\u670d\u52a1\u5668\u9a8c\u8bc1\u5b8c\u6210\uff0c\u60a8\u5fc5\u987b\u4ea4\u4ed8\u5185\u5bb9\u5e76\u8ba9Google\u77e5\u9053\u3002\u5982\u679c\u6ca1\u6709\u540e\u8005\uff0c\u8d2d\u4e70\u7684\u4ea7\u54c1\u5c06\u5728\u4e09\u5929\u5185\u81ea\u52a8\u9000\u6b3e\u3002\u975e\u5e38\u6709\u8da3\u7684\u4e00\u70b9\u662f\uff0c\u8fd9\u4e00\u653f\u7b56\u662fGoogle Play\u72ec\u6709\u7684\u2014\u2014iOS\u6ca1\u6709\u4efb\u4f55\u7c7b\u4f3c\u7684\u653f\u7b56\u3002\u60a8\u53ef\u4ee5\u901a\u8fc7\u4e24\u79cd\u65b9\u5f0f\u5411\u7528\u6237\u4f20\u8fbe\u60a8\u7684\u5185\u5bb9\uff1a<\/p>    <ul class=\"wp-block-list\"> <li>\u901a\u8fc7\u5ba2\u6237\u7aef\u4e0a\u7684<a href=\"https:\/\/developer.android.com\/reference\/com\/android\/billingclient\/api\/BillingClient#acknowledgepurchase\" target=\"_blank\" rel=\"noopener nofollow\">acknowledgePurchase()<\/a>\uff1b<\/li>    <li>\u901a\u8fc7\u540e\u7aef\u7684<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>\u3002<\/li> <\/ul>    <p>\u5982\u679c\u5904\u7406\u4e00\u4e2a\u6d88\u8017\u6027\u4ea7\u54c1\uff0c\u6211\u4eec\u5fc5\u987b\u8c03\u7528<a href=\"https:\/\/developer.android.com\/reference\/com\/android\/billingclient\/api\/BillingClient#consumeasync\" target=\"_blank\" rel=\"noopener nofollow\">consumeAsync()<\/a>\u65b9\u6cd5\u3002\u5b83\u5728\u5185\u90e8\u627f\u8ba4\u4e86\u8d2d\u4e70\u884c\u4e3a\uff0c\u540c\u65f6\u4e5f\u8ba9\u518d\u6b21\u8d2d\u4e70\u4ea7\u54c1\u6210\u4e3a\u53ef\u80fd\u3002\u8fd9\u53ea\u80fd\u901a\u8fc7Billing Library\u5b9e\u73b0\u3002\u7531\u4e8e\u67d0\u4e9b\u539f\u56e0\uff0cGoogle Play Developer API\u6ca1\u6709\u63d0\u4f9b\u4efb\u4f55\u5728\u540e\u7aef\u5b8c\u6210\u6b64\u64cd\u4f5c\u7684\u65b9\u6cd5\u3002\u5f88\u5947\u602a\u7684\u662f\uff0c\u4e0eGoogle Play\u4e0d\u540c\uff0cApp Store\u548cAppGallery\u90fd\u5206\u522b\u901a\u8fc7App Store Connect\u548cAppGallery Connect\u5c06\u4ea7\u54c1\u914d\u7f6e\u4e3a\u53ef\u6d88\u8017\u6027\u3002\u4e0d\u8fc7\uff0c\u4e5f\u5e94\u8be5\u4ee5\u4e00\u79cd\u660e\u786e\u7684\u65b9\u5f0f\u4f7f\u7528\u8fd9\u6837\u7684AppGallery\u4ea7\u54c1\u3002<\/p>      <p>\u8ba9\u6211\u4eec\u7f16\u5199\u7528\u4e8e\u786e\u8ba4\u548c\u6d88\u8d39\u7684\u65b9\u6cd5\uff0c\u4ee5\u53ca\u4e24\u4e2a\u7248\u672c\u7684processPurchase()\u65b9\u6cd5\uff0c\u4ee5\u8bf4\u660e\u6211\u4eec\u662f\u5426\u5728\u8fd0\u884c\u81ea\u5df1\u7684\u540e\u7aef\u3002<\/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>\u6ca1\u6709\u670d\u52a1\u5668\u9a8c\u8bc1\uff1a<\/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>\u6709\u670d\u52a1\u5668\u9a8c\u8bc1\uff1a<\/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>\u5728\u63a5\u4e0b\u6765\u7684\u6587\u7ae0\u4e2d\uff0c\u6211\u4eec\u5c06\u66f4\u8be6\u7ec6\u5730\u4ecb\u7ecd\u8d2d\u4e70\u7684\u670d\u52a1\u5668\u9a8c\u8bc1\u3002<\/p>    <p>\u5f53\u7136\uff0c\u6211\u4eec\u4e5f\u53ef\u4ee5\u5728\u5ba2\u6237\u7aef\u5b9e\u73b0\u7b2c\u4e8c\u4e2a\u793a\u4f8b\u4e2d\u7684\u786e\u8ba4\u3002\u4f46\u662f\uff0c\u5982\u679c\u60a8\u53ef\u4ee5\u5728\u540e\u7aef\u505a\u4e00\u4e9b\u4e8b\u60c5\uff0c\u90a3\u4e48\u60a8\u5c31\u5e94\u8be5\u8fd9\u6837\u505a\u3002\u5982\u679c\u786e\u8ba4\u6216\u4f7f\u7528\u8fc7\u7a0b\u629b\u51fa\u4efb\u4f55\u9519\u8bef\uff0c\u8fd9\u4e9b\u9519\u8bef\u90fd\u4e0d\u80fd\u88ab\u5ffd\u7565\u3002\u5982\u679c\u8d2d\u4e70\u5728\u6536\u5230<a href=\"https:\/\/developer.android.com\/reference\/com\/android\/billingclient\/api\/Purchase.PurchaseState#PURCHASED\" target=\"_blank\" rel=\"noopener nofollow\">PurchaseState.<em>PURCHASED<\/em><\/a>\u72b6\u6001\u540e3\u5929\u5185\u6ca1\u6709\u6267\u884c\u8fd9\u4e9b\u64cd\u4f5c\uff0c\u5c31\u4f1a\u88ab\u53d6\u6d88\u5e76\u9000\u6b3e\u3002\u56e0\u6b64\uff0c\u5982\u679c\u5728\u540e\u7aef\u4e0d\u53ef\u80fd\u505a\u5230\u8fd9\u4e00\u70b9\uff0c\u5e76\u4e14\u5728\u591a\u6b21\u5c1d\u8bd5\u4e4b\u540e\u4ecd\u7136\u51fa\u73b0\u9519\u8bef\uff0c\u90a3\u4e48\u6709\u4e00\u4e2a\u53ef\u9760\u7684\u53d8\u901a\u65b9\u6cd5\u3002\u60a8\u5fc5\u987b\u901a\u8fc7\u4e00\u4e9b\u751f\u547d\u5468\u671f\u6cd5\u83b7\u5f97\u7528\u6237\u5f53\u524d\u7684\u8d2d\u4e70\u60c5\u51b5\uff0c\u5982<a href=\"https:\/\/developer.android.com\/reference\/androidx\/lifecycle\/Lifecycle.Event\" target=\"_blank\" rel=\"noopener nofollow\">onStart()\u6216onResume()<\/a>\uff0c\u5e76\u7ee7\u7eed\u5c1d\u8bd5\uff0c\u5e0c\u671b\u7528\u6237\u5c06\u5728\u8fde\u63a5\u4e92\u8054\u7f51\u76843\u5929\u5185\u6253\u5f00\u5e94\u7528\u7a0b\u5e8f\u3002:)<\/p>    <p>\u56e0\u6b64\uff0cBillingClientWrapper\u7c7b\u7684\u5f53\u524d\u7248\u672c\u5982\u4e0b\u6240\u793a\uff1a<\/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>    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