[안드로이드] Support for pending purchases must be enabled. Enable this by calling 'enablePendingPurchases()' on BillingClientBuilder.

Google Play Store에서 in-app billing 구현 중 아래와 같은 exception이 발생할 수 있습니다.

java.lang.RuntimeException: Unable to start activity ComponentInfo{com.example.myapp/com.example.myapp.MainActivity}: java.lang.IllegalArgumentException: Support for pending purchases must be enabled. Enable this by calling 'enablePendingPurchases()' on BillingClientBuilder.
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3021)
        at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3156)
        at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78)
        at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108)
        at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68)
        at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1864)
        at android.os.Handler.dispatchMessage(Handler.java:106)
        at android.os.Looper.loop(Looper.java:205)
        at android.app.ActivityThread.main(ActivityThread.java:6991)
        at java.lang.reflect.Method.invoke(Native Method)
        at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:493)
        at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:884)
Caused by: java.lang.IllegalArgumentException: Support for pending purchases must be enabled. Enable this by calling 'enablePendingPurchases()' on BillingClientBuilder.
        at com.android.billingclient.api.BillingClient$Builder.build(com.android.billingclient:billing@@2.2.0:19)
        at com.example.myapp.MainActivity.initIAB(MainActivity.java:206)
        at com.example.myapp.MainActivity.onCreate(MainActivity.java:138)
        at android.app.Activity.performCreate(Activity.java:7159)
        at android.app.Activity.performCreate(Activity.java:7150)
        at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1272)
        at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3001)
        ... 11 more

 

아래와 같이 BillingClient 객체 생성시 enablePendingPurchases() method를 호출해주시면 문제는 해결됩니다.

BillingClient billingClient = BillingClient.newBuilder(this)
                .setListener(this)
                .enablePendingPurchases()
                .build();