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Java.Lang.NullPointerException: Attempt to invoke virtual method 'float android.view.MotionEvent.getX()' on a null object reference
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This is a migrated thread and some comments may be shown as answers.
Namysław
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Rank 1
Namysław asked on 27 Oct 2017, 09:12 AM
I've found issue at latest Telerik release (2017.3.1018.240) on my HockeyApp crashes list, but I'm not able to reproduce it again.

java.lang.NullPointerException: Attempt to invoke virtual method 'float android.view.MotionEvent.getX()' on a null object reference
    at com.telerik.android.primitives.widget.sidedrawer.RadSideDrawer.handlePan(RadSideDrawer.java:535)
    at com.telerik.android.primitives.widget.sidedrawer.RadSideDrawer.handleOnMove(RadSideDrawer.java:518)
    at com.telerik.android.primitives.widget.sidedrawer.RadSideDrawer.onGesture(RadSideDrawer.java:442)
    at com.telerik.android.primitives.widget.sidedrawer.RadSideDrawer.onInterceptTouchEvent(RadSideDrawer.java:420)
    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2175)
    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2632)
    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2321)
    at md5b60ffeb829f638581ab2bb9b1a7f4f3f.VisualElementRenderer_1.n_dispatchTouchEvent(Native Method)
    at md5b60ffeb829f638581ab2bb9b1a7f4f3f.VisualElementRenderer_1.dispatchTouchEvent(VisualElementRenderer_1.java:64)
    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2632)
    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2321)
    at md5b60ffeb829f638581ab2bb9b1a7f4f3f.Platform_DefaultRenderer.n_dispatchTouchEvent(Native Method)
    at md5b60ffeb829f638581ab2bb9b1a7f4f3f.Platform_DefaultRenderer.dispatchTouchEvent(Platform_DefaultRenderer.java:54)
    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2632)
    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2321)
    at md5b60ffeb829f638581ab2bb9b1a7f4f3f.Platform_DefaultRenderer.n_dispatchTouchEvent(Native Method)
    at md5b60ffeb829f638581ab2bb9b1a7f4f3f.Platform_DefaultRenderer.dispatchTouchEvent(Platform_DefaultRenderer.java:54)
    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2632)
    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2321)
    at md5b60ffeb829f638581ab2bb9b1a7f4f3f.VisualElementRenderer_1.n_dispatchTouchEvent(Native Method)
    at md5b60ffeb829f638581ab2bb9b1a7f4f3f.VisualElementRenderer_1.dispatchTouchEvent(VisualElementRenderer_1.java:64)
    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2632)
    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2321)
    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2632)
    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2321)
    at md5b60ffeb829f638581ab2bb9b1a7f4f3f.VisualElementRenderer_1.n_dispatchTouchEvent(Native Method)
    at md5b60ffeb829f638581ab2bb9b1a7f4f3f.VisualElementRenderer_1.dispatchTouchEvent(VisualElementRenderer_1.java:64)
    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2632)
    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2321)
    at md5b60ffeb829f638581ab2bb9b1a7f4f3f.PlatformRenderer.n_dispatchTouchEvent(Native Method)
    at md5b60ffeb829f638581ab2bb9b1a7f4f3f.PlatformRenderer.dispatchTouchEvent(PlatformRenderer.java:55)
    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2632)
    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2321)
    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2632)
    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2321)
    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2632)
    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2321)
    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2632)
    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2321)
    at com.android.internal.policy.DecorView.superDispatchTouchEvent(DecorView.java:416)
    at com.android.internal.policy.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1808)
    at android.app.Activity.dispatchTouchEvent(Activity.java:3065)
    at com.android.internal.policy.DecorView.dispatchTouchEvent(DecorView.java:378)
    at android.view.View.dispatchPointerEvent(View.java:10244)
    at android.view.ViewRootImpl$ViewPostImeInputStage.processPointerEvent(ViewRootImpl.java:4444)
    at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:4312)
    at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3859)
    at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3912)
    at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3878)
    at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:4005)
    at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3886)
    at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:4062)
    at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3859)
    at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3912)
    at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3878)
    at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3886)
    at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3859)
    at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:6253)
    at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:6227)
    at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:6188)
    at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:6356)
    at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:185)
    at android.view.InputEventReceiver.nativeConsumeBatchedInputEvents(Native Method)
    at android.view.InputEventReceiver.consumeBatchedInputEvents(InputEventReceiver.java:176)
    at android.view.ViewRootImpl.doConsumeBatchedInput(ViewRootImpl.java:6327)
    at android.view.ViewRootImpl$ConsumeBatchedInputRunnable.run(ViewRootImpl.java:6379)
    at android.view.Choreographer$CallbackRecord.run(Choreographer.java:874)
    at android.view.Choreographer.doCallbacks(Choreographer.java:686)
    at android.view.Choreographer.doFrame(Choreographer.java:615)
    at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:860)
    at android.os.Handler.handleCallback(Handler.java:751)
    at android.os.Handler.dispatchMessage(Handler.java:95)
    at android.os.Looper.loop(Looper.java:154)
    at android.app.ActivityThread.main(ActivityThread.java:6186)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:889)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:779)
Xamarin caused by: Java.Lang.NullPointerException: Attempt to invoke virtual method 'float android.view.MotionEvent.getX()' on a null object reference
  at System.Runtime.ExceptionServices.ExceptionDispatchInfo.Throw () [0x0000c] in <896ad1d315ca4ba7b117efb8dacaedcf>:0
  at Java.Interop.JniEnvironment+InstanceMethods.CallNonvirtualBooleanMethod (Java.Interop.JniObjectReference instance, Java.Interop.JniObjectReference type, Java.Interop.JniMethodInfo method, Java.Interop.JniArgumentValue* args) [0x00089] in <1d799d87381c4db5b1252825fd105b84>:0
  at Java.Interop.JniPeerMembers+JniInstanceMethods.InvokeVirtualBooleanMethod (System.String encodedMember, Java.Interop.IJavaPeerable self, Java.Interop.JniArgumentValue* parameters) [0x0005d] in <1d799d87381c4db5b1252825fd105b84>:0
  at Android.Views.View.DispatchTouchEvent (Android.Views.MotionEvent e) [0x00031] in <c82a099136944d8aa96281cf061cbc12>:0
  at Xamarin.Forms.Platform.Android.VisualElementRenderer`1[TElement].DispatchTouchEvent (Android.Views.MotionEvent e) [0x0000a] in D:\agent\_work\1\s\Xamarin.Forms.Platform.Android\VisualElementRenderer.cs:63
  at Android.Views.View.n_DispatchTouchEvent_Landroid_view_MotionEvent_ (System.IntPtr jnienv, System.IntPtr native__this, System.IntPtr native_e) [0x0000f] in <c82a099136944d8aa96281cf061cbc12>:0
  at (wrapper dynamic-method) System.Object:32a00490-e740-48ae-9824-eb8a5ec0707b (intptr,intptr,intptr)
  --- End of managed Java.Lang.NullPointerException stack trace ---
java.lang.NullPointerException: Attempt to invoke virtual method 'float android.view.MotionEvent.getX()' on a null object reference
    at com.telerik.android.primitives.widget.sidedrawer.RadSideDrawer.handlePan(RadSideDrawer.java:535)
    at com.telerik.android.primitives.widget.sidedrawer.RadSideDrawer.handleOnMove(RadSideDrawer.java:518)
    at com.telerik.android.primitives.widget.sidedrawer.RadSideDrawer.onGesture(RadSideDrawer.java:442)
    at com.telerik.android.primitives.widget.sidedrawer.RadSideDrawer.onInterceptTouchEvent(RadSideDrawer.java:420)
    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2175)
    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2632)
    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2321)
    at md5b60ffeb829f638581ab2bb9b1a7f4f3f.VisualElementRenderer_1.n_dispatchTouchEvent(Native Method)
    at md5b60ffeb829f638581ab2bb9b1a7f4f3f.VisualElementRenderer_1.dispatchTouchEvent(VisualElementRenderer_1.java:64)
    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2632)
    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2321)
    at md5b60ffeb829f638581ab2bb9b1a7f4f3f.Platform_DefaultRenderer.n_dispatchTouchEvent(Native Method)
    at md5b60ffeb829f638581ab2bb9b1a7f4f3f.Platform_DefaultRenderer.dispatchTouchEvent(Platform_DefaultRenderer.java:54)
    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2632)
    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2321)
    at md5b60ffeb829f638581ab2bb9b1a7f4f3f.Platform_DefaultRenderer.n_dispatchTouchEvent(Native Method)
    at md5b60ffeb829f638581ab2bb9b1a7f4f3f.Platform_DefaultRenderer.dispatchTouchEvent(Platform_DefaultRenderer.java:54)
    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2632)
    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2321)
    at md5b60ffeb829f638581ab2bb9b1a7f4f3f.VisualElementRenderer_1.n_dispatchTouchEvent(Native Method)
    at md5b60ffeb829f638581ab2bb9b1a7f4f3f.VisualElementRenderer_1.dispatchTouchEvent(VisualElementRenderer_1.java:64)
    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2632)
    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2321)
    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2632)
    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2321)
    at md5b60ffeb829f638581ab2bb9b1a7f4f3f.VisualElementRenderer_1.n_dispatchTouchEvent(Native Method)
    at md5b60ffeb829f638581ab2bb9b1a7f4f3f.VisualElementRenderer_1.dispatchTouchEvent(VisualElementRenderer_1.java:64)
    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2632)
    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2321)
    at md5b60ffeb829f638581ab2bb9b1a7f4f3f.PlatformRenderer.n_dispatchTouchEvent(Native Method)
    at md5b60ffeb829f638581ab2bb9b1a7f4f3f.PlatformRenderer.dispatchTouchEvent(PlatformRenderer.java:55)
    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2632)
    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2321)
    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2632)
    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2321)
    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2632)
    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2321)
    at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:2632)
    at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2321)
    at com.android.internal.policy.DecorView.superDispatchTouchEvent(DecorView.java:416)
    at com.android.internal.policy.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1808)
    at android.app.Activity.dispatchTouchEvent(Activity.java:3065)
    at com.android.internal.policy.DecorView.dispatchTouchEvent(DecorView.java:378)
    at android.view.View.dispatchPointerEvent(View.java:10244)
    at android.view.ViewRootImpl$ViewPostImeInputStage.processPointerEvent(ViewRootImpl.java:4444)
    at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:4312)
    at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3859)
    at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3912)
    at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3878)
    at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:4005)
    at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3886)
    at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:4062)
    at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3859)
    at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:3912)
    at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:3878)
    at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:3886)
    at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:3859)
    at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:6253)
    at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:6227)
    at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:6188)
    at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:6356)
    at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:185)
    at android.view.InputEventReceiver.nativeConsumeBatchedInputEvents(Native Method)
    at android.view.InputEventReceiver.consumeBatchedInputEvents(InputEventReceiver.java:176)
    at android.view.ViewRootImpl.doConsumeBatchedInput(ViewRootImpl.java:6327)
    at android.view.ViewRootImpl$ConsumeBatchedInputRunnable.run(ViewRootImpl.java:6379)
    at android.view.Choreographer$CallbackRecord.run(Choreographer.java:874)
    at android.view.Choreographer.doCallbacks(Choreographer.java:686)
    at android.view.Choreographer.doFrame(Choreographer.java:615)
    at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:860)
    at android.os.Handler.handleCallback(Handler.java:751)
    at android.os.Handler.dispatchMessage(Handler.java:95)
    at android.os.Looper.loop(Looper.java:154)
    at android.app.ActivityThread.main(ActivityThread.java:6186)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:889)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:779)

1 Answer, 1 is accepted

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Stefan Nenchev
Telerik team
answered on 31 Oct 2017, 09:33 AM
Hi, Namyslaw,

Thank you for the crash report. Actually, I have noticed that the issue is already discussed in another thread and my colleague has logged a bug report at our end - SideDrawer [Android]: When opening the sometimes a NullReferenceException is thrown.  As we are not able to reproduce it, we cannot be sure in what scenario it appears. However, we will apply a blind fix to try resolving it. Please follow the item so you are notified when this happens.

Have a great rest of the week.

Regards,
Stefan Nenchev
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Asked by
Namysław
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Answers by
Stefan Nenchev
Telerik team
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