Pushwoosh.getInstance()错误

Question

当我尝试在pushwoosh库中更新我的Pushwoosh应用程序时，我得到了一个错误。我已经在Gradle中更新了它。

07-06 18:21:59.637 19950-19950/com.ahmet.sen E/AndroidRuntime: FATAL EXCEPTION: main
                                                              Process: com.ahmet.sen, PID: 19950
                                                              java.lang.ExceptionInInitializerError
                                                                  at com.ahmet.sen.MainActivity.onCreate(MainActivity.java:50)
                                                                  at android.app.Activity.performCreate(Activity.java:6237)
                                                                  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1107)
                                                                  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2369)
                                                                  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476)
                                                                  at android.app.ActivityThread.-wrap11(ActivityThread.java)
                                                                  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344)
                                                                  at android.os.Handler.dispatchMessage(Handler.java:102)
                                                                  at android.os.Looper.loop(Looper.java:148)
                                                                  at android.app.ActivityThread.main(ActivityThread.java:5417)
                                                                  at java.lang.reflect.Method.invoke(Native Method)
                                                                  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
                                                                  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
                                                               Caused by: java.lang.NullPointerException: Attempt to invoke virtual method 'com.pushwoosh.notification.j com.pushwoosh.c.d()' on a null object reference
                                                                  at com.pushwoosh.Pushwoosh.<init>(Unknown Source)
                                                                  at com.pushwoosh.Pushwoosh.<clinit>(Unknown Source)
                                                                  at com.ahmet.sen.MainActivity.onCreate(MainActivity.java:50) 
                                                                  at android.app.Activity.performCreate(Activity.java:6237) 
                                                                  at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1107) 
                                                                  at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2369) 
                                                                  at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2476) 
                                                                  at android.app.ActivityThread.-wrap11(ActivityThread.java) 
                                                                  at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1344) 
                                                                  at android.os.Handler.dispatchMessage(Handler.java:102) 
                                                                  at android.os.Looper.loop(Looper.java:148) 
                                                                  at android.app.ActivityThread.main(ActivityThread.java:5417) 
                                                                  at java.lang.reflect.Method.invoke(Native Method) 
                                                                  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726) 
                                                                  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616) 

我在哪里得到了错误

        Pushwoosh.getInstance().registerForPushNotifications();

Answer 1

在此处复制来自Pushwoosh Github的响应：

这不是Pushwoosh SDK的bug。这是Android应用程序环境中多处理器应用程序的一个特点。

当您集成LeakCanary、AppMetrica等分析工具时，这些库将为其自身启动一个新的进程。在此过程中将创建应用程序的一个新实例。但是您不需要在这个单独的进程中侦听推送，因此在默认情况下，您不应该在Application.onCreate()中调用registerForPushNotifications()。

因此，有两种可能的解决方案：

• 若要在Application.onCreate()
• If中不调用registerForPushNotifications要在Application.onCreate()中调用registerForPushNotifications，应执行签入应用程序的主进程：

 `List < ActivityManager.RunningAppProcessInfo > runningAppProcesses = ((ActivityManager) getSystemService(Context.ACTIVITY_SERVICE)).getRunningAppProcesses();     if (runningAppProcesses != null && runningAppProcesses.size() != 0) {      for (ActivityManager.RunningAppProcessInfo runningAppProcessInfo: runningAppProcesses) {       boolean isCurrentProcess = runningAppProcessInfo.pid == android.os.Process.myPid();       boolean isMainProcessName = getPackageName().equals(runningAppProcessInfo.processName);       if (isCurrentProcess && isMainProcessName) {        Pushwoosh.getInstance().registerForPushNotifications(...);        break;       }      }     }`