使用ViewGroup拋出NullPointerException

Question

有沒有人有線索可能導致這種情況？

11-16 16:23:26.745: ERROR/AndroidRuntime(9549): Uncaught handler: thread main exiting due to uncaught exception 
11-16 16:23:26.765: ERROR/AndroidRuntime(9549): java.lang.NullPointerException 
11-16 16:23:26.765: ERROR/AndroidRuntime(9549):  at android.view.ViewGroup.dispatchWindowVisibilityChanged(ViewGroup.java:692) 
11-16 16:23:26.765: ERROR/AndroidRuntime(9549):  at android.view.ViewGroup.dispatchWindowVisibilityChanged(ViewGroup.java:692) 
11-16 16:23:26.765: ERROR/AndroidRuntime(9549):  at android.view.ViewRoot.performTraversals(ViewRoot.java:722) 
11-16 16:23:26.765: ERROR/AndroidRuntime(9549):  at android.view.ViewRoot.handleMessage(ViewRoot.java:1658) 
11-16 16:23:26.765: ERROR/AndroidRuntime(9549):  at android.os.Handler.dispatchMessage(Handler.java:99) 
11-16 16:23:26.765: ERROR/AndroidRuntime(9549):  at android.os.Looper.loop(Looper.java:123) 
11-16 16:23:26.765: ERROR/AndroidRuntime(9549):  at android.app.ActivityThread.main(ActivityThread.java:4363) 
11-16 16:23:26.765: ERROR/AndroidRuntime(9549):  at java.lang.reflect.Method.invokeNative(Native Method) 
11-16 16:23:26.765: ERROR/AndroidRuntime(9549):  at java.lang.reflect.Method.invoke(Method.java:521) 
11-16 16:23:26.765: ERROR/AndroidRuntime(9549):  at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:862) 
11-16 16:23:26.765: ERROR/AndroidRuntime(9549):  at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:620) 
11-16 16:23:26.765: ERROR/AndroidRuntime(9549):  at dalvik.system.NativeStart.main(Native Method) 

Answer 1

此錯誤用於在我們的崩潰報告中顯示出一些規律性。追蹤非常困難，但最終我們發現我們有時會觸發代碼，從surfaceDestroyed（）（SurfaceHolder的回調方法）的視圖層次結構中刪除視圖。如果您的應用程序使用的是SurfaceView，請確保您沒有做任何修改surfaceDestroyed（）中的視圖層次結構的操作。