RuntimeException：在应用内购买中调用 BillingClient 函数时

Question

private BillingClient billingClient = BillingClient.newBuilder(activity)
            .setListener(purchasesUpdatedListener)
            .enablePendingPurchases()
            .build();

我正在集成计费 google api 以进行购买，但是当我调用此方法时，出现错误而不是活动。 错误是：

/AndroidRuntime: FATAL EXCEPTION: main
Process: com.xxxxx.xxxxx, PID: 9433
java.lang.RuntimeException: Unable to instantiate activity ComponentInfo{com.xxxxx.xxxx/com.xxxx.coins_history.activity.CoinsHistoryActivity}: java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.Context android.content.Context.getApplicationContext()' on a null object reference
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2876)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3081)
    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$H.handleMessage(ActivityThread.java:1831)
    at android.os.Handler.dispatchMessage(Handler.java:106)
    at android.os.Looper.loop(Looper.java:201)
    at android.app.ActivityThread.main(ActivityThread.java:6810)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:547)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:873)
 Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'android.content.Context android.content.Context.getApplicationContext()' on a null object reference
    at android.content.ContextWrapper.getApplicationContext(ContextWrapper.java:126)
    at com.android.billingclient.api.BillingClientImpl.initialize(com.android.billingclient:billing@@4.0.0:1)
    at com.android.billingclient.api.BillingClientImpl.<init>(com.android.billingclient:billing@@4.0.0:4)
    at com.android.billingclient.api.BillingClientImpl.<init>(com.android.billingclient:billing@@4.0.0:9)
    at com.android.billingclient.api.BillingClient$Builder.build(com.android.billingclient:billing@@4.0.0:4)
    at com.jetmedianetwork.coins_history.activity.CoinsHistoryActivity.<init>(CoinsHistoryActivity.java:133)
    at java.lang.Class.newInstance(Native Method)
    at android.app.AppComponentFactory.instantiateActivity(AppComponentFactory.java:69)
    at androidx.core.app.CoreComponentFactory.instantiateActivity(CoreComponentFactory.java:45)
    at android.app.Instrumentation.newActivity(Instrumentation.java:1216)
    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2864)
    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:3081) 
    at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:78) 
    at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:108) 
    at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:68) 
    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1831) 
    at android.os.Handler.dispatchMessage(Handler.java:106) 
    at android.os.Looper.loop(Looper.java:201) 
    at android.app.ActivityThread.main(ActivityThread.java:6810) 
    at java.lang.reflect.Method.invoke(Native Method) 
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:547) 
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:873) 

E/FirebaseCrashlytics：在 com.google.firebase.crashlytics.internal.common.Utils.awaitEvenIfOnMainThread(Utils.java:122) 处处理未捕获的异常 java.util.concurrent.TimeoutException 时出错，位于 com.google.firebase.crashlytics.internal.common .CrashlyticsController.handleUncaughtException(CrashlyticsController.java:231) 在 com.google.firebase.crashlytics.internal.common.CrashlyticsController$1.onUncaughtException(CrashlyticsController.java:153) 在 com.google.firebase.crashlytics.internal.common.CrashlyticsUncaughtExceptionc uncaughtException(CrashlyticsUncaughtExceptionHandler.java:54) at com.facebook.internal.instrument.crashreport.CrashHandler.uncaughtException(CrashHandler.java:65) at org.chromium.base.JavaExceptionReporter.uncaughtException(chromium-Monochrome.aab-stable-432418123 6) 在 java.lang.ThreadGroup.uncaughtException(ThreadGroup.java:1068) 在 java.lang.ThreadGroup.uncaughtException(ThreadGroup.java:1063) 在 java.lang.Thread.dispatchUncaughtException(Thread.java:1955)

Answer 1

我认为这里的问题是您的代码中有一个空指针，因为计费客户端还没有被实例化。 尝试修改代码如下

private BillingClient billingClient = BillingClient!!.newBuilder(activity)
        .setListener(purchasesUpdatedListener)
        .enablePendingPurchases()
        .build();