Internal NPE for Android in ViewGroupAttachedToWindow Manager

Question

Does anyone know how to solve the following bug?

java.lang.NullPointerException
   at android.view.ViewGroup.dispatchAttachedToWindow(ViewGroup.java:2434)
   at android.view.ViewGroup.dispatchAttachedToWindow(ViewGroup.java:2434)
   at android.view.ViewGroup.dispatchAttachedToWindow(ViewGroup.java:2434)
   at android.view.ViewGroup.dispatchAttachedToWindow(ViewGroup.java:2434)
   at android.view.ViewGroup.dispatchAttachedToWindow(ViewGroup.java:2434)
   at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:1313)
   at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1110)
   at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:4484)
   at android.view.Choreographer$CallbackRecord.run(Choreographer.java:725)
   at android.view.Choreographer.doCallbacks(Choreographer.java:555)
   at android.view.Choreographer.doFrame(Choreographer.java:525)
   at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:711)
   at android.os.Handler.handleCallback(Handler.java:615)
   at android.os.Handler.dispatchMessage(Handler.java:92)
   at android.os.Looper.loop(Looper.java:137)
   at android.app.ActivityThread.main(ActivityThread.java:4856)
   at java.lang.reflect.Method.invokeNative(Method.java)
   at java.lang.reflect.Method.invoke(Method.java:511)
   at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1007)
   at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:774)
   at dalvik.system.NativeStart.main(NativeStart.java)

I received several times on Android devices 4.1when the application returns from the background.

Answer 1

Do you get it only on 4.1v? It seems that your rootview or your windows are not available, we need more information about the encoder / log to get the best results.

If so, there is no error, you need to check that your views are not null, perhaps the GC has completed your scan so that you get this error.

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