{"id":137877,"date":"2021-03-24T00:00:00","date_gmt":"2021-03-24T00:00:00","guid":{"rendered":"https:\/\/adapty.io\/de-android-in-app-purchases-google-play-billing-library-part-2\/"},"modified":"2021-03-24T00:00:00","modified_gmt":"2021-03-24T00:00:00","slug":"android-in-app-purchases-google-play-billing-library-part-2","status":"publish","type":"post","link":"https:\/\/adapty.io\/de\/blog\/android-in-app-purchases-google-play-billing-library-part-2\/","title":{"rendered":"Android In-App-K\u00e4ufe, Teil 2: Verarbeitung von K\u00e4ufen mit der Google Play Billing Library"},"content":{"rendered":"\n<p>Im vorherigen Artikel haben wir eine Wrapper-Klasse erstellt, um mit der Billing Library zu arbeiten:<\/p>\n\n\n\n<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\nimport com.android.billingclient.api.*\nclass BillingClientWrapper(context: Context) : PurchasesUpdatedListener {\n   interface OnQueryProductsListener {\n       fun onSuccess(products: List&lt;SkuDetails&gt;)\n       fun onFailure(error: Error)\n   }\n   class Error(val responseCode: Int, val debugMessage: String)\n   private val billingClient = BillingClient\n       .newBuilder(context)\n       .enablePendingPurchases()\n       .setListener(this)\n       .build()\n   fun queryProducts(listener: OnQueryProductsListener) {\n       val skusList = listOf(&quot;premium_sub_month&quot;, &quot;premium_sub_year&quot;, &quot;some_inapp&quot;)\n       queryProductsForType(\n           skusList,\n           BillingClient.SkuType.SUBS\n       ) { billingResult, skuDetailsList -&gt;\n           if (billingResult.responseCode == BillingClient.BillingResponseCode.OK) {\n               val products = skuDetailsList ?: mutableListOf()\n               queryProductsForType(\n                   skusList,\n                   BillingClient.SkuType.INAPP\n               ) { billingResult, skuDetailsList -&gt;\n                   if (billingResult.responseCode == BillingClient.BillingResponseCode.OK) {\n                       products.addAll(skuDetailsList ?: listOf())\n                       listener.onSuccess(products)\n                   } else {\n                       listener.onFailure(\n                           Error(billingResult.responseCode, billingResult.debugMessage)\n                       )\n                   }\n               }\n           } else {\n               listener.onFailure(\n                   Error(billingResult.responseCode, billingResult.debugMessage)\n               )\n           }\n       }\n   }\n   private fun queryProductsForType(\n       skusList: List&lt;String&gt;,\n       @BillingClient.SkuType type: String,\n       listener: SkuDetailsResponseListener\n   ) {\n       onConnected {\n           billingClient.querySkuDetailsAsync(\n               SkuDetailsParams.newBuilder().setSkusList(skusList).setType(type).build(),\n               listener\n           )\n       }\n   }\n   private fun onConnected(block: () -&gt; Unit) {\n       billingClient.startConnection(object : BillingClientStateListener {\n           override fun onBillingSetupFinished(billingResult: BillingResult) {\n               block()\n           }\n           override fun onBillingServiceDisconnected() {\n               \/\/ Try to restart the connection on the next request to\n               \/\/ Google Play by calling the startConnection() method.\n           }\n       })\n   }\n   override fun onPurchasesUpdated(billingResult: BillingResult, purchaseList: MutableList&lt;Purchase&gt;?) {\n       \/\/ here come callbacks about new purchases\n   }\n}\" style=\"color:#d8dee9ff;display:none\" aria-label=\"Copy\" class=\"code-block-pro-copy-button\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/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>\n<span class=\"line\"><span style=\"color: #81A1C1\">import<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">com.android.billingclient.api.*<\/span><\/span>\n<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>\n<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>\n<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>\n<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>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<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>\n<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>\n<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>\n<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>\n<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>\n<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>\n<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>\n<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>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">       queryProductsForType<\/span><span style=\"color: #ECEFF4\">(<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">           skusList<\/span><span style=\"color: #ECEFF4\">,<\/span><\/span>\n<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>\n<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>\n<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>\n<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>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">               queryProductsForType<\/span><span style=\"color: #ECEFF4\">(<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">                   skusList<\/span><span style=\"color: #ECEFF4\">,<\/span><\/span>\n<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>\n<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>\n<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>\n<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>\n<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>\n<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>\n<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>\n<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>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">                       <\/span><span style=\"color: #ECEFF4\">)<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">                   <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">               <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<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>\n<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>\n<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>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">               <\/span><span style=\"color: #ECEFF4\">)<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">           <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<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>\n<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>\n<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>\n<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>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">       onConnected <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span>\n<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>\n<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>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">               listener<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">           <\/span><span style=\"color: #ECEFF4\">)<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<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>\n<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>\n<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>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">               block<\/span><span style=\"color: #ECEFF4\">()<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">           }<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">           override fun onBillingServiceDisconnected<\/span><span style=\"color: #ECEFF4\">()<\/span><span style=\"color: #D8DEE9FF\"> {<\/span><\/span>\n<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>\n<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>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">           }<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">       }<\/span><span style=\"color: #ECEFF4\">)<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<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>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #616E88\">\/\/ here come callbacks about new purchases<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><span style=\"color: #ECEFF4\">}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n<p>Lassen Sie uns nun mit der Kaufimplementierung fortfahren und unsere Klasse verbessern.<\/p>\n\n\n\n\n\n<h2 class=\"wp-block-heading\" id=\"das-design-eines-abonnement-screens\">Das Design eines Abonnement-Screens<\/h2>\n\n\n\n<p>Jede App mit In-App-K\u00e4ufen hat einen Paywall-Screen. Es gelten <a href=\"https:\/\/support.google.com\/googleplay\/android-developer\/answer\/9900533\" target=\"_blank\" rel=\"noopener nofollow\">Google-Richtlinien<\/a>, die das Minimum an Elementen und Anleitungstexten definieren und in solchen Screens ersichtlich sein m\u00fcssen. Wir fassen uns kurz und stellen sie Ihnen zusammenfassend vor. Im Paywall-Screen m\u00fcssen Sie explizit Ihre Abonnement-Bedingungen erl\u00e4utern. Dazu geh\u00f6ren die Kosten, die Dauer und ob das Abonnement notwendig ist, um die App nutzen zu k\u00f6nnen. Sie m\u00fcssen vermeiden, dass Nutzer zus\u00e4tzliche Schritte unternehmen m\u00fcssen, um jene Bedingungen einsehen zu k\u00f6nnen. Sie m\u00fcssen direkt ersichtlich sein.&nbsp;<\/p>\n\n\n\n<p>Hier nutzen wir einen vereinfachten Paywall-Screen als Beispiel.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter is-resized\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/adapty.io\/wp-content\/uploads\/2023\/01\/631abc67c79cf6614ff8de49_3321.png\" alt=\"\" width=\"219\" height=\"463\"><figcaption class=\"wp-element-caption\"><em>Android Sample Paywall<\/em><\/figcaption><\/figure><\/div>\n\n\n<p>Wir haben die folgenden Elemente auf unserem Paywall-Screen:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Eine \u00dcberschrift.<\/li>\n\n\n\n<li>Buttons, um den Kaufprozess zu starten. Diese Buttons f\u00fchren den Nutzer durch die Einzelheiten des Abonnements, damit sie unter anderem die Kosten erfahren, die in der lokalen W\u00e4hrung angezeigt werden.<\/li>\n\n\n\n<li>Anleitungstext.&nbsp;<\/li>\n\n\n\n<li>Einen Button zum Wiederherstellen der zuvor get\u00e4tigten K\u00e4ufe. Dieses Element ist ein Must-Have f\u00fcr jede App, die Abonnements oder nicht-verbrauchbare K\u00e4ufe anbietet.<\/li>\n<\/ul>\n\n\n\n<p>Optimierung des Codes zur Darstellung der Produktdetails<\/p>\n\n\n\n<p>In unserem Beispiel gibt es vier Produkte:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Zwei automatisch verl\u00e4ngerbare Abonnements (&#8222;premium_sub_month&#8220; and &#8222;premium_sub_year&#8220;);<\/li>\n\n\n\n<li>Ein Produkt, das nicht mehrfach gekauft werden kann (ein nicht-verbrauchbares Produkt) (\u201cunlock_feature\u201d);<\/li>\n\n\n\n<li>Ein Produkt, dass mehrfach gekauft werden kann (ein verbrauchbares Produkt) (\u201ccoin_pack_large\u201d).<\/li>\n<\/ul>\n\n\n\n<p>Um das Beispiel zu vereinfachen, nutzen wir eine Aktivit\u00e4t, die wir in den BillingClientWrapper des vorherigen Artikels injizieren. Das Layout umfasst eine feste Anzahl von Kauf-Buttons.<\/p>\n\n\n\n<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() {\n\n   @Inject\n   lateinit var billingClientWrapper: BillingClientWrapper\n\n   override fun onCreate(savedInstanceState: Bundle?) {\n       super.onCreate(savedInstanceState)\n       setContentView(R.layout.activity_paywall)\n\n       displayProducts() \/\/to be declared below\n   }\n}\" style=\"color:#d8dee9ff;display:none\" aria-label=\"Copy\" class=\"code-block-pro-copy-button\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/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>\n<span class=\"line\"><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #81A1C1\">@Inject<\/span><\/span>\n<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>\n<span class=\"line\"><\/span>\n<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>\n<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>\n<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>\n<span class=\"line\"><\/span>\n<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>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><span style=\"color: #ECEFF4\">}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n<p>Praktischerweise f\u00fcgen wir eine Map hinzu, in der die <a href=\"https:\/\/developer.android.com\/reference\/com\/android\/billingclient\/api\/SkuDetails#getSku()\" target=\"_blank\" rel=\"noopener nofollow\">SKU<\/a> des Produkts der Key ist und der Wert der jeweilige Button auf dem Screen ist.<\/p>\n\n\n\n<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) {\n   mapOf(\n       &quot;premium_sub_month&quot; to monthlySubButton,\n       &quot;premium_sub_year&quot; to yearlySubButton,\n       &quot;coin_pack_large&quot; to coinPackLargeButton,\n       &quot;unlock_feature&quot; to unlockFeatureButton,\n   )\n}\" style=\"color:#d8dee9ff;display:none\" aria-label=\"Copy\" class=\"code-block-pro-copy-button\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/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>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #88C0D0\">mapOf<\/span><span style=\"color: #ECEFF4\">(<\/span><\/span>\n<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>\n<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>\n<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>\n<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>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #ECEFF4\">)<\/span><\/span>\n<span class=\"line\"><span style=\"color: #ECEFF4\">}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n<p>Lassen Sie uns eine Methode deklarieren, um die Produkte im User Interface darzustellen. Sie basiert auf der Logik, die wir in unserem <a href=\"https:\/\/adapty.io\/blog\/android-in-app-subscriptions-part-1\" target=\"_blank\" rel=\"noopener\">vorherigen <\/a>Tutorial eingef\u00fchrt haben.<\/p>\n\n\n\n<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() {\n   billingClientWrapper.queryProducts(object : BillingClientWrapper.OnQueryProductsListener {\n       override fun onSuccess(products: List&lt;SkuDetails&gt;&gt;) {\n           products.forEach { product -&gt;\n               purchaseButtonsMap[product.sku]?.apply {\n                   text = &quot;${product.description} for ${product.price}&quot;\n                   setOnClickListener {\n                       billingClientWrapper.purchase(this@PaywallActivity, product) \/\/will be declared below\n                   }\n               }\n           }\n       }\n\n       override fun onFailure(error: BillingClientWrapper.Error) {\n           \/\/handle error\n       }\n   })\n}\" style=\"color:#d8dee9ff;display:none\" aria-label=\"Copy\" class=\"code-block-pro-copy-button\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/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>\n<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>\n<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>\n<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>\n<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>\n<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>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">                   setOnClickListener <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span>\n<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>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">                   <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">               }<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">           }<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">       }<\/span><\/span>\n<span class=\"line\"><\/span>\n<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>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">           <\/span><span style=\"color: #616E88\">\/\/handle error<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">   }<\/span><span style=\"color: #ECEFF4\">)<\/span><\/span>\n<span class=\"line\"><span style=\"color: #ECEFF4\">}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n<p>product.price&nbsp;ist ein bereits formatierter String, der die lokale W\u00e4hrung f\u00fcr ein Konto bestimmt. Er muss nicht weiter formatiert werden. Alle anderen Eigenschaften des <a href=\"https:\/\/developer.android.com\/reference\/com\/android\/billingclient\/api\/SkuDetails\" target=\"_blank\" rel=\"noopener nofollow\">SkuDetails<\/a> Class Object sind ebenfalls lokalisiert.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"der-beginn-des-kaufvorgangs\">Der Beginn des Kaufvorgangs<\/h2>\n\n\n\n<p>Um den Kauf zu verarbeiten, m\u00fcssen wir die <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> Methode aus dem Main Thread der App ausf\u00fchren.<\/p>\n\n\n\n<p>Wir f\u00fcgen daf\u00fcr eine purchase() Methode im BillingClientWrapper ein.&nbsp;<\/p>\n\n\n\n<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) {\n   onConnected {\n       activity.runOnUiThread {\n           billingClient.launchBillingFlow(\n               activity,\n               BillingFlowParams.newBuilder().setSkuDetails(product).build()\n           )\n       }\n   }\n}\" style=\"color:#d8dee9ff;display:none\" aria-label=\"Copy\" class=\"code-block-pro-copy-button\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/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>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">   onConnected <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span>\n<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>\n<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>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">               activity<\/span><span style=\"color: #ECEFF4\">,<\/span><\/span>\n<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>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">           <\/span><span style=\"color: #ECEFF4\">)<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><span style=\"color: #ECEFF4\">}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n<p>Die launchBillingFlow() Methode hat kein Callback. Die Antwort kehr zur\u00fcck zur onPurchasesUpdated() Methode. Erinnern Sie sich, wie wir sie <a href=\"https:\/\/adapty.io\/blog\/android-in-app-subscriptions-part-1\" target=\"_blank\" rel=\"noopener\">im vorherigen Artikel<\/a> deklariert und sie f\u00fcr sp\u00e4ter gespeichert haben? Jetzt brauchen wir sie.<\/p>\n\n\n\n<p>Die onPurchasesUpdated() Methode wird genutzt, sobald es ein Ergebnis der Nutzerinteraktion mit dem Kaufdialog gibt. Dies kann ein erfolgreicher Kauf sein, aber auch eine Kaufstornierung, wenn der Nutzer des Dialogfenster schlie\u00dft. In diesem Fall erhalten wir den <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> Code. Alternativ kann es auch jede andere m\u00f6gliche Fehlernachricht sein.<\/p>\n\n\n\n<p>Wie das OnQueryProductsListener Interface aus dem vorherigen Artikel deklarieren wir das OnPurchaseListener Interface in der BillingClientWrapper Klasse. \u00dcber dieses Interface erhalten wir entweder den Kauf (ein <a href=\"https:\/\/developer.android.com\/reference\/com\/android\/billingclient\/api\/Purchase\" target=\"_blank\" rel=\"noopener nofollow\">Purchase<\/a> Class Object) oder eine Fehlernachricht, die wir <a href=\"https:\/\/adapty.io\/blog\/android-in-app-subscriptions\" target=\"_blank\" rel=\"noopener\">in der vorherigen Anleitung deklariert haben<\/a>. Als n\u00e4chstes besprechen wir den Fall, in dem ein Purchase Class Objekt null sein kann, obwohl der Kauf erfolgreich war.<\/p>\n\n\n\n<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 {\n   fun onPurchaseSuccess(purchase: Purchase?)\n   fun onPurchaseFailure(error: Error)\n}\n\nvar onPurchaseListener: OnPurchaseListener? = null\" style=\"color:#d8dee9ff;display:none\" aria-label=\"Copy\" class=\"code-block-pro-copy-button\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/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>\n<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>\n<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>\n<span class=\"line\"><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><\/span>\n<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>\n\n\n\n<p>Nun implementieren wir es in der PaywallActivity:<\/p>\n\n\n\n<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 {\n\n   @Inject\n   lateinit var billingClientWrapper: BillingClientWrapper\n\n   private val purchaseButtonsMap: Map&lt;String, Button&gt; by lazy(LazyThreadSafetyMode.NONE) {\n       mapOf(\n           &quot;premium_sub_month&quot; to monthlySubButton,\n           &quot;premium_sub_year&quot; to yearlySubButton,\n           &quot;coin_pack_large&quot; to coinPackLargeButton,\n           &quot;unlock_feature&quot; to unlockFeatureButton,\n       )\n   }\n\n   override fun onCreate(savedInstanceState: Bundle?) {\n       super.onCreate(savedInstanceState)\n       setContentView(R.layout.activity_paywall)\n\n       billingClientWrapper.onPurchaseListener = this\n\n       displayProducts()\n   }\n\n   override fun onPurchaseSuccess(purchase: Purchase?) {\n       \/\/handle successful purchase\n   }\n\n   override fun onPurchaseFailure(error: BillingClientWrapper.Error) {\n       \/\/handle error or user cancelation\n   }\n\n   private fun displayProducts() {\n       billingClientWrapper.queryProducts(object : BillingClientWrapper.OnQueryProductsListener {\n           override fun onSuccess(products: List&lt;SkuDetails&gt;) {\n               products.forEach { product -&gt;\n                   purchaseButtonsMap[product.sku]?.apply {\n                       text = &quot;${product.description} for ${product.price}&quot;\n                       setOnClickListener {\n                           billingClientWrapper.purchase(this@PaywallActivity, product)\n                       }\n                   }\n               }\n           }\n\n           override fun onFailure(error: BillingClientWrapper.Error) {\n               \/\/handle error\n           }\n       })\n   }\n}\" style=\"color:#d8dee9ff;display:none\" aria-label=\"Copy\" class=\"code-block-pro-copy-button\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/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>\n<span class=\"line\"><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #81A1C1\">@Inject<\/span><\/span>\n<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>\n<span class=\"line\"><\/span>\n<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>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #88C0D0\">mapOf<\/span><span style=\"color: #ECEFF4\">(<\/span><\/span>\n<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>\n<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>\n<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>\n<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>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #ECEFF4\">)<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><\/span>\n<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>\n<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>\n<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>\n<span class=\"line\"><\/span>\n<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>\n<span class=\"line\"><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">       displayProducts<\/span><span style=\"color: #ECEFF4\">()<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><\/span>\n<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>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #616E88\">\/\/handle successful purchase<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><\/span>\n<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>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #616E88\">\/\/handle error or user cancelation<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><\/span>\n<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>\n<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>\n<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>\n<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>\n<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>\n<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>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">                       setOnClickListener <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span>\n<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>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">                       <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">                   }<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">               }<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">           }<\/span><\/span>\n<span class=\"line\"><\/span>\n<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>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">               <\/span><span style=\"color: #616E88\">\/\/handle error<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">           <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">       }<\/span><span style=\"color: #ECEFF4\">)<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><span style=\"color: #ECEFF4\">}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n<p>Lassen Sie uns onPurchaseUpdated() ein wenig Logik hinzuf\u00fcgen:<\/p>\n\n\n\n<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(\n   billingResult: BillingResult,\n   purchaseList: MutableList&lt;Purchase&gt;?\n) {\n   when (billingResult.responseCode) {\n       BillingClient.BillingResponseCode.OK -&gt; {\n           if (purchaseList == null) {\n               \/\/to be discussed in the next article\n               onPurchaseListener?.onPurchaseSuccess(null)\n               return\n           }\n\n           purchaseList.forEach(::processPurchase) \/\/to be declared below\n       }\n       else -&gt; {\n           \/\/error occured or user canceled\n           onPurchaseListener?.onPurchaseFailure(\n               BillingClientWrapper.Error(\n                   billingResult.responseCode,\n                   billingResult.debugMessage\n               )\n           )\n       }\n   }\n}\" style=\"color:#d8dee9ff;display:none\" aria-label=\"Copy\" class=\"code-block-pro-copy-button\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/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>\n<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>\n<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>\n<span class=\"line\"><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span>\n<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>\n<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>\n<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>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">               <\/span><span style=\"color: #616E88\">\/\/to be discussed in the next article<\/span><\/span>\n<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>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">               <\/span><span style=\"color: #81A1C1\">return<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">           <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><\/span>\n<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>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<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>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">           <\/span><span style=\"color: #616E88\">\/\/error occured or user canceled<\/span><\/span>\n<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>\n<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>\n<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>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">                   billingResult<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">debugMessage<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">               <\/span><span style=\"color: #ECEFF4\">)<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">           <\/span><span style=\"color: #ECEFF4\">)<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><span style=\"color: #ECEFF4\">}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n<p>Falls purchaseList nicht leer ist, m\u00fcssen wir zun\u00e4chst die Items raussuchen, deren purchaseState gleich <a href=\"https:\/\/developer.android.com\/google\/play\/billing\/integrate#pending\" rel=\"nofollow noopener\" target=\"_blank\">PurchaseState.PURCHASED<\/a> ist, da es auch <a href=\"https:\/\/developer.android.com\/google\/play\/billing\/integrate#pending\" rel=\"nofollow noopener\" target=\"_blank\">ausstehende<\/a> K\u00e4ufe igbt. In diesem Fall endet der User Flow hier. Laut der <a href=\"https:\/\/developer.android.com\/google\/play\/billing\/integrate#process\" rel=\"nofollow noopener\" target=\"_blank\">Dokumente<\/a> sollten wir den Kauf auf unserem Server \u00fcberpr\u00fcfen. Dies behandeln wir in den n\u00e4chsten Artikeln dieser Serie. Sobald die Server\u00fcberpr\u00fcfung abgeschlossen ist, m\u00fcssen Sie den Content abliefern und Google davon in Kenntnis setzen. Tun Sie das nicht, wird der Kauf nach drei Tagen automatisch erstattet. Dies gilt \u00fcbrigens nur f\u00fcr Google Play \u2014 iOS kennt keine Richtlinien dieser Art. Sie haben zwei M\u00f6glichkeiten, die Lieferung des Contents an Ihre Nutzer zu best\u00e4tigen:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Per <a href=\"https:\/\/developer.android.com\/reference\/com\/android\/billingclient\/api\/BillingClient#acknowledgepurchase\" rel=\"nofollow noopener\" target=\"_blank\">acknowledgePurchase()<\/a> auf der Client-Seite;<\/li>\n\n\n\n<li>Via <a href=\"https:\/\/developers.google.com\/android-publisher\/api-ref\/purchases\/products\/acknowledge\" rel=\"nofollow noopener\" target=\"_blank\">Product.Purchases.Acknowledge<\/a>\/<a href=\"https:\/\/developers.google.com\/android-publisher\/api-ref\/purchases\/subscriptions\/acknowledge\" rel=\"nofollow noopener\" target=\"_blank\">Purchases.Subscriptions.Acknowledge<\/a> im Backend.<\/li>\n<\/ul>\n\n\n\n<p>Handelt es sich um ein verbrauchbares Produkt, m\u00fcssen wir stattdessen die <a href=\"https:\/\/developer.android.com\/reference\/com\/android\/billingclient\/api\/BillingClient#consumeasync\" rel=\"nofollow noopener\" target=\"_blank\">consumeAsync()<\/a> Methode nutzen. Sie best\u00e4tigt den Kauf im Hintergrund und erm\u00f6glicht dem Nutzer, das Produkt erneut zu kaufen. Dies kann nur mit der Billing Library erfolgen. Aus irgendeinem Grund bietet die Google Play Developer API keine andere L\u00f6sung f\u00fcr das Backend. Im Gegensatz zu Google Play gibt es sowohl im App Store als auch in der AppGallery die M\u00f6glichkeit, das Produkt als verbrauchbares Produkt per App Store Connect und AppGallery Connect zu konfigurieren. AppGallery Produkte sollten jedoch auf explizite Weise verbraucht werden.<\/p>\n\n\n\n\n\n<p>Lassen Sie uns Methoden f\u00fcr die Best\u00e4tigung und den Verbrauch schreiben, aber auch zwei Versionen der processPurchase() Methode f\u00fcr die F\u00e4lle, dass wir unser eigenes Backend laufen lassen oder nicht.<\/p>\n\n\n\n<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(\n   purchase: Purchase,\n   callback: AcknowledgePurchaseResponseListener\n) {\n   onConnected {\n       billingClient.acknowledgePurchase(\n           AcknowledgePurchaseParams.newBuilder().setPurchaseToken(purchase.purchaseToken)\n               .build(),\n           callback::onAcknowledgePurchaseResponse\n       )\n   }\n}\n\nprivate fun consumePurchase(purchase: Purchase, callback: ConsumeResponseListener) {\n   onConnected {\n       billingClient.consumeAsync(\n           ConsumeParams.newBuilder().setPurchaseToken(purchase.purchaseToken).build()\n       ) { billingResult, purchaseToken -&gt;\n           callback.onConsumeResponse(billingResult, purchaseToken)\n       }\n   }\n}\" style=\"color:#d8dee9ff;display:none\" aria-label=\"Copy\" class=\"code-block-pro-copy-button\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/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>\n<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>\n<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>\n<span class=\"line\"><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">   onConnected <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span>\n<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>\n<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>\n<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>\n<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>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #ECEFF4\">)<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><\/span>\n<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>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">   onConnected <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span>\n<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>\n<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>\n<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>\n<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>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><span style=\"color: #ECEFF4\">}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n<p>Ohne Server\u00fcberpr\u00fcfung:<\/p>\n\n\n\n<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) {\n   if (purchase.purchaseState == Purchase.PurchaseState.PURCHASED) {\n       onPurchaseListener?.onPurchaseSuccess(purchase)\n\n       if (purchase.skus.firstOrNull() == &quot;coin_pack_large&quot;) {\n           \/\/consuming our only consumable product\n           consumePurchase(purchase) { billingResult, purchaseToken -&gt;\n               if (billingResult.responseCode != BillingClient.BillingResponseCode.OK) {\n                   \/\/implement retry logic or try to consume again in onResume()\n               }\n           }\n       } else if (!purchase.isAcknowledged) {\n           acknowledgePurchase(purchase) { billingResult -&gt;\n               if (billingResult.responseCode != BillingClient.BillingResponseCode.OK) {\n                   \/\/implement retry logic or try to acknowledge again in onResume()\n               }\n           }\n       }\n   }\n}\" style=\"color:#d8dee9ff;display:none\" aria-label=\"Copy\" class=\"code-block-pro-copy-button\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/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>\n<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>\n<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>\n<span class=\"line\"><\/span>\n<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>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">           <\/span><span style=\"color: #616E88\">\/\/consuming our only consumable product<\/span><\/span>\n<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>\n<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>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">                   <\/span><span style=\"color: #616E88\">\/\/implement retry logic or try to consume again in onResume()<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">               <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">           <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<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>\n<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>\n<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>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">                   <\/span><span style=\"color: #616E88\">\/\/implement retry logic or try to acknowledge again in onResume()<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">               <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">           <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><span style=\"color: #ECEFF4\">}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n<p>Mit Server\u00fcberpr\u00fcfung:<\/p>\n\n\n\n<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) {\n   if (purchase.purchaseState == Purchase.PurchaseState.PURCHASED) {\n       api.verifyPurchase(purchase.purchaseToken) { error -&gt;\n           if (error != null) {\n               onPurchaseListener?.onPurchaseSuccess(purchase)\n\n               if (purchase.skus.firstOrNull() == &quot;coin_pack_large&quot;) {\n                   \/\/consuming our only consumable product\n                   billingClient.consumeAsync(\n                       ConsumeParams.newBuilder().setPurchaseToken(purchase.purchaseToken)\n                           .build()\n                   ) { billingResult, purchaseToken -&gt;\n                       if (billingResult.responseCode != BillingClient.BillingResponseCode.OK) {\n                           \/\/implement retry logic or try to consume again in onResume()\n                       }\n                   }\n               }\n           } else {\n               \/\/handle verification error\n           }\n       }\n   }\n}\" style=\"color:#d8dee9ff;display:none\" aria-label=\"Copy\" class=\"code-block-pro-copy-button\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/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>\n<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>\n<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>\n<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>\n<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>\n<span class=\"line\"><\/span>\n<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>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">                   <\/span><span style=\"color: #616E88\">\/\/consuming our only consumable product<\/span><\/span>\n<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>\n<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>\n<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>\n<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>\n<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>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">                           <\/span><span style=\"color: #616E88\">\/\/implement retry logic or try to consume again in onResume()<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">                       <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">                   <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">               <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<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>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">               <\/span><span style=\"color: #616E88\">\/\/handle verification error<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">           <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><span style=\"color: #ECEFF4\">}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n<p>In den n\u00e4chsten Artikeln besprechen wir die Server\u00fcberpr\u00fcfung f\u00fcr K\u00e4ufe im Detail.<\/p>\n\n\n\n<p>Nat\u00fcrlich k\u00f6nnten wir die Best\u00e4tigung im zweiten Beispiel auch auf der Client-Seite implementieren. Wenn Sie etwas im Backend l\u00f6sen k\u00f6nnen, sollten Sie dies auch so tun. Falls es bei der Best\u00e4tigung oder dem Verbrauch zu Fehlern kommt, k\u00f6nnen diese nicht ignoriert werden. Werden sie nicht innerhalb von 3 Tagen nach dem Erhalt des Kaufs laut <a href=\"https:\/\/developer.android.com\/reference\/com\/android\/billingclient\/api\/Purchase.PurchaseState#PURCHASED\" target=\"_blank\" rel=\"noopener nofollow\">PurchaseState.<em>PURCHASED<\/em><\/a> Status durchgef\u00fchrt, wird der Kauf storniert und erstattet. Wenn Sie es nicht \u00fcber das Backend l\u00f6sen k\u00f6nnen und st\u00e4ndig Fehlermeldungen erhalten, gibt es also eine zuverl\u00e4ssige Abhilfe. Sie m\u00fcssen die aktuellen K\u00e4ufe des Nutzers \u00fcber eine Lifecycle-Methode wie <a href=\"https:\/\/developer.android.com\/reference\/androidx\/lifecycle\/Lifecycle.Event\" target=\"_blank\" rel=\"noopener nofollow\">onStart() <\/a>oder<a href=\"https:\/\/developer.android.com\/reference\/androidx\/lifecycle\/Lifecycle.Event\" target=\"_blank\" rel=\"noopener nofollow\"> onResume()<\/a> erhalten und es erneut versuchen, um zu hoffen, dass der Nutzer die App innerhalb von 3 Tagen nutzt, w\u00e4hrend er mit dem Internet verbunden ist.<\/p>\n\n\n\n<p>Die aktuelle Version der BillingClientWrapper Klass sieht so aus:<\/p>\n\n\n\n<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\nimport android.content.Context\nimport com.android.billingclient.api.*\n\nclass BillingClientWrapper(context: Context, private val api: Api) : PurchasesUpdatedListener {\n\n   interface OnQueryProductsListener {\n       fun onSuccess(products: List&lt;SkuDetails&gt;)\n       fun onFailure(error: Error)\n   }\n\n   interface OnPurchaseListener {\n       fun onPurchaseSuccess(purchase: Purchase?)\n       fun onPurchaseFailure(error: Error)\n   }\n\n   var onPurchaseListener: OnPurchaseListener? = null\n\n   class Error(val responseCode: Int, val debugMessage: String)\n\n   private val billingClient = BillingClient\n       .newBuilder(context)\n       .enablePendingPurchases()\n       .setListener(this)\n       .build()\n\n   fun purchase(activity: Activity, product: SkuDetails) {\n       onConnected {\n           activity.runOnUiThread {\n               billingClient.launchBillingFlow(\n                   activity,\n                   BillingFlowParams.newBuilder().setSkuDetails(product).build()\n               )\n           }\n       }\n   }\n\n   fun queryProducts(listener: OnQueryProductsListener) {\n       val skusList = listOf(&quot;premium_sub_month&quot;, &quot;premium_sub_year&quot;, &quot;coin_pack_large&quot;, &quot;unlock_feature&quot;)\n\n       queryProductsForType(\n           skusList,\n           BillingClient.SkuType.SUBS\n       ) { billingResult, skuDetailsList -&gt;\n           if (billingResult.responseCode == BillingClient.BillingResponseCode.OK) {\n               val products = skuDetailsList ?: mutableListOf()\n               queryProductsForType(\n                   skusList,\n                   BillingClient.SkuType.INAPP\n               ) { billingResult, skuDetailsList -&gt;\n                   if (billingResult.responseCode == BillingClient.BillingResponseCode.OK) {\n                       products.addAll(skuDetailsList ?: listOf())\n                       listener.onSuccess(products)\n                   } else {\n                       listener.onFailure(\n                           Error(billingResult.responseCode, billingResult.debugMessage)\n                       )\n                   }\n               }\n           } else {\n               listener.onFailure(\n                   Error(billingResult.responseCode, billingResult.debugMessage)\n               )\n           }\n       }\n   }\n\n   private fun queryProductsForType(\n       skusList: List&lt;String&gt;,\n       @BillingClient.SkuType type: String,\n       listener: SkuDetailsResponseListener\n   ) {\n       onConnected {\n           billingClient.querySkuDetailsAsync(\n               SkuDetailsParams.newBuilder().setSkusList(skusList).setType(type).build(),\n               listener\n           )\n       }\n   }\n\n   private fun onConnected(block: () -&gt; Unit) {\n       billingClient.startConnection(object : BillingClientStateListener {\n           override fun onBillingSetupFinished(billingResult: BillingResult) {\n               block()\n           }\n\n           override fun onBillingServiceDisconnected() {\n               \/\/ Try to restart the connection on the next request to\n               \/\/ Google Play by calling the startConnection() method.\n           }\n       })\n   }\n\n   override fun onPurchasesUpdated(\n       billingResult: BillingResult,\n       purchaseList: MutableList&lt;Purchase&gt;?\n   ) {\n       when (billingResult.responseCode) {\n           BillingClient.BillingResponseCode.OK -&gt; {\n               if (purchaseList == null) {\n                   \/\/to be discussed in the next article\n                   onPurchaseListener?.onPurchaseSuccess(null)\n                   return\n               }\n\n               purchaseList.forEach(::processPurchase)\n           }\n           else -&gt; {\n               \/\/error occured or user canceled\n               onPurchaseListener?.onPurchaseFailure(\n                   BillingClientWrapper.Error(\n                       billingResult.responseCode,\n                       billingResult.debugMessage\n                   )\n               )\n           }\n       }\n   }\n\n   private fun processPurchase(purchase: Purchase) {\n       if (purchase.purchaseState == Purchase.PurchaseState.PURCHASED) {\n           api.verifyPurchase(purchase.purchaseToken) { error -&gt;\n               if (error != null) {\n                   onPurchaseListener?.onPurchaseSuccess(purchase)\n\n                   if (purchase.skus.firstOrNull() == &quot;coin_pack_large&quot;) {\n                       \/\/consuming our only consumable product\n                       billingClient.consumeAsync(\n                           ConsumeParams.newBuilder().setPurchaseToken(purchase.purchaseToken)\n                               .build()\n                       ) { billingResult, purchaseToken -&gt;\n                           if (billingResult.responseCode != BillingClient.BillingResponseCode.OK) {\n                               \/\/implement retry logic or try to consume again in onResume()\n                           }\n                       }\n                   }\n               } else {\n                   \/\/handle verification error\n               }\n           }\n       }\n   }\n\n   private fun acknowledgePurchase(\n       purchase: Purchase,\n       callback: AcknowledgePurchaseResponseListener\n   ) {\n       onConnected {\n           billingClient.acknowledgePurchase(\n               AcknowledgePurchaseParams.newBuilder().setPurchaseToken(purchase.purchaseToken)\n                   .build(),\n               callback::onAcknowledgePurchaseResponse\n           )\n       }\n   }\n\n   private fun consumePurchase(purchase: Purchase, callback: ConsumeResponseListener) {\n       onConnected {\n           billingClient.consumeAsync(\n               ConsumeParams.newBuilder().setPurchaseToken(purchase.purchaseToken).build()\n           ) { billingResult, purchaseToken -&gt;\n               callback.onConsumeResponse(billingResult, purchaseToken)\n           }\n       }\n   }\n}\" style=\"color:#d8dee9ff;display:none\" aria-label=\"Copy\" class=\"code-block-pro-copy-button\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/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>\n<span class=\"line\"><span style=\"color: #81A1C1\">import<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">android.content.Context<\/span><\/span>\n<span class=\"line\"><span style=\"color: #81A1C1\">import<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">com.android.billingclient.api.*<\/span><\/span>\n<span class=\"line\"><\/span>\n<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>\n<span class=\"line\"><\/span>\n<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>\n<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>\n<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>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><\/span>\n<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>\n<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>\n<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>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><\/span>\n<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>\n<span class=\"line\"><\/span>\n<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>\n<span class=\"line\"><\/span>\n<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>\n<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>\n<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>\n<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>\n<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>\n<span class=\"line\"><\/span>\n<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>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">       onConnected <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span>\n<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>\n<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>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">                   activity<\/span><span style=\"color: #ECEFF4\">,<\/span><\/span>\n<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>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">               <\/span><span style=\"color: #ECEFF4\">)<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">           <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><\/span>\n<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>\n<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>\n<span class=\"line\"><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">       queryProductsForType<\/span><span style=\"color: #ECEFF4\">(<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">           skusList<\/span><span style=\"color: #ECEFF4\">,<\/span><\/span>\n<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>\n<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>\n<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>\n<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>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">               queryProductsForType<\/span><span style=\"color: #ECEFF4\">(<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">                   skusList<\/span><span style=\"color: #ECEFF4\">,<\/span><\/span>\n<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>\n<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>\n<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>\n<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>\n<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>\n<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>\n<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>\n<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>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">                       <\/span><span style=\"color: #ECEFF4\">)<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">                   <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">               <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<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>\n<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>\n<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>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">               <\/span><span style=\"color: #ECEFF4\">)<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">           <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><\/span>\n<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>\n<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>\n<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>\n<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>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">       onConnected <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span>\n<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>\n<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>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">               listener<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">           <\/span><span style=\"color: #ECEFF4\">)<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><\/span>\n<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>\n<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>\n<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>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">               block<\/span><span style=\"color: #ECEFF4\">()<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">           }<\/span><\/span>\n<span class=\"line\"><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">           override fun onBillingServiceDisconnected<\/span><span style=\"color: #ECEFF4\">()<\/span><span style=\"color: #D8DEE9FF\"> {<\/span><\/span>\n<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>\n<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>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">           }<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">       }<\/span><span style=\"color: #ECEFF4\">)<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><\/span>\n<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>\n<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>\n<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>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span>\n<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>\n<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>\n<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>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">                   <\/span><span style=\"color: #616E88\">\/\/to be discussed in the next article<\/span><\/span>\n<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>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">                   <\/span><span style=\"color: #81A1C1\">return<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">               <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><\/span>\n<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>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">           <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<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>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">               <\/span><span style=\"color: #616E88\">\/\/error occured or user canceled<\/span><\/span>\n<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>\n<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>\n<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>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">                       billingResult<\/span><span style=\"color: #ECEFF4\">.<\/span><span style=\"color: #D8DEE9FF\">debugMessage<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">                   <\/span><span style=\"color: #ECEFF4\">)<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">               <\/span><span style=\"color: #ECEFF4\">)<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">           <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><\/span>\n<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>\n<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>\n<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>\n<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>\n<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>\n<span class=\"line\"><\/span>\n<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>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">                       <\/span><span style=\"color: #616E88\">\/\/consuming our only consumable product<\/span><\/span>\n<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>\n<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>\n<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>\n<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>\n<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>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">                               <\/span><span style=\"color: #616E88\">\/\/implement retry logic or try to consume again in onResume()<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">                           <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">                       <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">                   <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<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>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">                   <\/span><span style=\"color: #616E88\">\/\/handle verification error<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">               <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">           <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><\/span>\n<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>\n<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>\n<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>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">       onConnected <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span>\n<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>\n<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>\n<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>\n<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>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">           <\/span><span style=\"color: #ECEFF4\">)<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><\/span>\n<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>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">       onConnected <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span>\n<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>\n<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>\n<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>\n<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>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">           <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">       <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">   <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><span style=\"color: #ECEFF4\">}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n<p>Vermutlich fragen Sie sich, warum die Buttons f\u00fcr alle Produkte aktiv sind, egal ob der Nutzer sie bereits gekauft hat oder nicht. Vielleicht haben Sie auch Fragen dazu, was passiert, wenn man beide Abonnements kauft. Wird das erste Abonnement das zweite ersetzen? Oder existieren beide nebeneinander? In den folgenden Artikeln kommen wir auf diese Fragen zu sprechen.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>In unserem zweiten Kapitel behandeln wir die technischen Details bez\u00fcglich der Kaufverarbeitung<\/p>\n","protected":false},"author":43,"featured_media":143566,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1064],"tags":[],"page-builder":[],"class_list":["post-137877","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-lehrgang"],"acf":[],"_links":{"self":[{"href":"https:\/\/adapty.io\/de\/wp-json\/wp\/v2\/posts\/137877","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/adapty.io\/de\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/adapty.io\/de\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/adapty.io\/de\/wp-json\/wp\/v2\/users\/43"}],"replies":[{"embeddable":true,"href":"https:\/\/adapty.io\/de\/wp-json\/wp\/v2\/comments?post=137877"}],"version-history":[{"count":0,"href":"https:\/\/adapty.io\/de\/wp-json\/wp\/v2\/posts\/137877\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/adapty.io\/de\/wp-json\/wp\/v2\/media\/143566"}],"wp:attachment":[{"href":"https:\/\/adapty.io\/de\/wp-json\/wp\/v2\/media?parent=137877"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/adapty.io\/de\/wp-json\/wp\/v2\/categories?post=137877"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/adapty.io\/de\/wp-json\/wp\/v2\/tags?post=137877"},{"taxonomy":"page-builder","embeddable":true,"href":"https:\/\/adapty.io\/de\/wp-json\/wp\/v2\/page-builder?post=137877"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}