相关疑难解决方法(0)

什么是空指针异常(java.lang.NullPointerException)以及它们的原因是什么？

可以使用哪些方法/工具来确定原因,以便停止异常导致程序过早终止？

我在Android应用程序中实现了youtube播放器api.

播放视频时,我经常遇到以下崩溃:

08-03 11:18:25.289 15393 15393 E AndroidRuntime: java.lang.NullPointerException: Attempt to invoke virtual method 'void iqe.a(boolean)' on a null object reference
08-03 11:18:25.289 15393 15393 E AndroidRuntime:    at ioy.onFilterTouchEventForSecurity(SourceFile:115)
08-03 11:18:25.289 15393 15393 E AndroidRuntime:    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2091)
08-03 11:18:25.289 15393 15393 E AndroidRuntime:    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2561)
08-03 11:18:25.289 15393 15393 E AndroidRuntime:    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2199)
08-03 11:18:25.289 15393 15393 E AndroidRuntime:    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2561)
08-03 11:18:25.289 15393 15393 E AndroidRuntime:    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2199)
08-03 11:18:25.289 15393 15393 E AndroidRuntime:    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2561)
08-03 11:18:25.289 15393 …

我正在使用从YouTubeBaseActivity和YouTubePlayerView扩展来的活动来播放Youtube中的视频。有时应用程序崩溃并出现以下异常。

    "STACK_TRACE": "java.lang.NullPointerException: Attempt to invoke virtual 
            method 'void mcr.b(boolean)' on a null object reference 
     mbe.onFilterTouchEventForSecurity(SourceFile:32)
            android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2193) 
            android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2671) 
            android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2301)
    android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2671)
        android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2301)
    android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2671)
        android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2301)
    android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2671) android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2301) 
    android.view.ViewGroup.dispatchTransformedTouchEvent
    (ViewGroup.java:2671)android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:23
    01)android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2671)
    android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2301)
    com.android.internal.policy.DecorView.superDispatchTouchEvent(DecorView.java:447)com.android.internal.policy.PhoneWindow.superDispatchTouchEvent
    (PhoneWindow.java:1871)android.app.Activity.dispatchTouchEvent(Activity.java:3213) com.android.internal.policy.DecorView.dispatchTouchEvent(DecorView.java:409)at android.view.View.dispatchPointerEvent(View.java:10232) 
    android.view.ViewRootImpl$ViewPostImeInputStage.processPointerEvent(ViewRootImpl.java:4862)android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:4723) 
    android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4255) android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:4308)
     android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4274)android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:4401)android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:4282) android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:4458) android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4255) android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:4308)
at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4274)
android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:4282)
android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4255)
android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:6682)android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:6656)android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:6617) android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:6809)android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:192)android.os.MessageQueue.nativePollOnce(Native Method) android.os.MessageQueue.next(MessageQueue.java:356)android.os.Looper.loop(Looper.java:138)android.app.ActivityThread.main(ActivityThread.java:6523)java.lang.reflect.Method.invoke(Native Method)com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:942)com.android.internal.os.ZygoteInit.main(ZygoteInit.java:832)

如何解决这个问题？不是我的研究，但没有找到任何有效的方法。

另请参阅：在onFilterTouchEventForSecurity处获取NullPointerException

Youtube Player API中发生大量崩溃