React-native-gesture-handler: Android crash

[VasilenkoVladislav]

Issue Description

Hello, I really like your library, but sometimes it has crash on production. Can you help me please?

Fatal Exception: java.lang.NullPointerException: Attempt to invoke virtual method 'boolean com.swmansion.gesturehandler.GestureHandler.wantEvents()' on a null object reference
at com.swmansion.gesturehandler.GestureHandlerOrchestrator.deliverEventToGestureHandler(GestureHandlerOrchestrator.java:293)
at com.swmansion.gesturehandler.GestureHandlerOrchestrator.deliverEventToGestureHandlers(GestureHandlerOrchestrator.java:262)
at com.swmansion.gesturehandler.GestureHandlerOrchestrator.onTouchEvent(GestureHandlerOrchestrator.java:102)
at com.swmansion.gesturehandler.react.RNGestureHandlerRootHelper.dispatchTouchEvent(RNGestureHandlerRootHelper.java:121)
at com.swmansion.gesturehandler.react.RNGestureHandlerRootView.dispatchTouchEvent(RNGestureHandlerRootView.java:36)

Environment

• React Native Gesture Handler version: 1.0.12
• React Native version: 0.57.8
• Platform: Android
• Device info : Samsung Galaxy S7, production mode.

[lebedev]

@VasilenkoVladislav can you create a repo with Minimal, Complete, and Verifiable example, where your issue can easily be reproduced, please?

[osdnk]

I think this issue has been resolved in new release. If not, please let me now.

[JeromeBonfort]

Hello, I had the same crash in production with the new release

Description

NullPointerException - Attempt to invoke virtual method 'android.view.View com.swmansion.gesturehandler.GestureHandler.getView()' on a null object reference

com.swmansion.gesturehandler.GestureHandlerOrchestrator in deliverEventToGestureHandler at line 279
com.swmansion.gesturehandler.GestureHandlerOrchestrator in deliverEventToGestureHandlers at line 259
com.swmansion.gesturehandler.GestureHandlerOrchestrator in onTouchEvent at line 101
com.swmansion.gesturehandler.react.RNGestureHandlerRootHelper in dispatchTouchEvent at line 121
com.swmansion.gesturehandler.react.RNGestureHandlerEnabledRootView in dispatchTouchEvent at line 31
android.view.ViewGroup in dispatchTransformedTouchEvent at line 2677

Environment

• RNGH: 1.1.0
• RN: 0.57.8
• Plateform: Android
• Device info: Elite 4T, Android 7.0

[dudeinthemirror]

I'm getting the same crash in production. I'm using version 1.3.0
(react-native 0.59.10)

[GunaShekar02]

Has this issue been resolved?
My app crashes in the release version but runs perfectly on an emulator.

[jarekfurgalski-ct]

Not resolved. Running latest version of gesture handler and react native. Yet, it still breaks.

[VasilenkoVladislav]

Hello, I had the same crash in production with the new release

Description

NullPointerException - Attempt to invoke virtual method 'android.view.View com.swmansion.gesturehandler.GestureHandler.getView()' on a null object reference

com.swmansion.gesturehandler.GestureHandlerOrchestrator in deliverEventToGestureHandler at line 279
com.swmansion.gesturehandler.GestureHandlerOrchestrator in deliverEventToGestureHandlers at line 259
com.swmansion.gesturehandler.GestureHandlerOrchestrator in onTouchEvent at line 101
com.swmansion.gesturehandler.react.RNGestureHandlerRootHelper in dispatchTouchEvent at line 121
com.swmansion.gesturehandler.react.RNGestureHandlerEnabledRootView in dispatchTouchEvent at line 31
android.view.ViewGroup in dispatchTransformedTouchEvent at line 2677

Environment

• RNGH: 1.1.0
• RN: 0.57.8
• Plateform: Android
• Device info: Elite 4T, Android 7.0

I solved this problem using patch-package.

    private void deliverEventToGestureHandler(GestureHandler handler, MotionEvent event) {
+    if (handler == null) {
+      return;
+    }
     if (!isViewAttachedUnderWrapper(handler.getView())) {
       handler.cancel();
       return;

[AugustoAleGon]

@kmagiera @osdnk Is this path include in the new version? I got the same error with the latest version!

[EugeneDraitsev]

@osdnk I have same issue with react-native-gesture-handler 1.6.0 and react-native 0.61.5

Fatal Exception: java.lang.NullPointerException: Attempt to read from field 'boolean com.swmansion.gesturehandler.GestureHandler.mIsActive' on a null object reference
       at com.swmansion.gesturehandler.GestureHandlerOrchestrator$1.compare(GestureHandlerOrchestrator.java:33)
       at com.swmansion.gesturehandler.GestureHandlerOrchestrator$1.compare(GestureHandlerOrchestrator.java:30)
       at java.util.TimSort.countRunAndMakeAscending(TimSort.java:355)
       at java.util.TimSort.sort(TimSort.java:220)
       at java.util.Arrays.sort(Arrays.java:1498)
       at com.swmansion.gesturehandler.GestureHandlerOrchestrator.deliverEventToGestureHandlers(GestureHandlerOrchestrator.java:257)
       at com.swmansion.gesturehandler.GestureHandlerOrchestrator.onTouchEvent(GestureHandlerOrchestrator.java:101)
       at com.swmansion.gesturehandler.react.RNGestureHandlerRootHelper.dispatchTouchEvent(RNGestureHandlerRootHelper.java:126)
       at com.swmansion.gesturehandler.react.RNGestureHandlerEnabledRootView.dispatchTouchEvent(RNGestureHandlerEnabledRootView.java:36)
       at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3159)
       at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2844)
       at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3159)
       at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2844)
       at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3159)
       at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2844)
       at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3159)
       at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2844)
       at android.view.ViewGroup.dispatchTransformedTouchEvent(ViewGroup.java:3159)
       at android.view.ViewGroup.dispatchTouchEvent(ViewGroup.java:2844)
       at com.android.internal.policy.DecorView.superDispatchTouchEvent(DecorView.java:601)
       at com.android.internal.policy.PhoneWindow.superDispatchTouchEvent(PhoneWindow.java:1871)
       at android.app.Activity.dispatchTouchEvent(Activity.java:3384)
       at androidx.appcompat.view.WindowCallbackWrapper.dispatchTouchEvent(WindowCallbackWrapper.java:69)
       at com.android.internal.policy.DecorView.dispatchTouchEvent(DecorView.java:563)
       at android.view.View.dispatchPointerEvent(View.java:12791)
       at android.view.ViewRootImpl$ViewPostImeInputStage.processPointerEvent(ViewRootImpl.java:5668)
       at android.view.ViewRootImpl$ViewPostImeInputStage.onProcess(ViewRootImpl.java:5463)
       at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4956)
       at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:5009)
       at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4975)
       at android.view.ViewRootImpl$AsyncInputStage.forward(ViewRootImpl.java:5112)
       at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:4983)
       at android.view.ViewRootImpl$AsyncInputStage.apply(ViewRootImpl.java:5169)
       at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4956)
       at android.view.ViewRootImpl$InputStage.onDeliverToNext(ViewRootImpl.java:5009)
       at android.view.ViewRootImpl$InputStage.forward(ViewRootImpl.java:4975)
       at android.view.ViewRootImpl$InputStage.apply(ViewRootImpl.java:4983)
       at android.view.ViewRootImpl$InputStage.deliver(ViewRootImpl.java:4956)
       at android.view.ViewRootImpl.deliverInputEvent(ViewRootImpl.java:7734)
       at android.view.ViewRootImpl.doProcessInputEvents(ViewRootImpl.java:7674)
       at android.view.ViewRootImpl.enqueueInputEvent(ViewRootImpl.java:7635)
       at android.view.ViewRootImpl$WindowInputEventReceiver.onInputEvent(ViewRootImpl.java:7845)
       at android.view.InputEventReceiver.dispatchInputEvent(InputEventReceiver.java:197)
       at android.view.InputEventReceiver.nativeConsumeBatchedInputEvents(InputEventReceiver.java)
       at android.view.InputEventReceiver.consumeBatchedInputEvents(InputEventReceiver.java:186)
       at android.view.ViewRootImpl.doConsumeBatchedInput(ViewRootImpl.java:7808)
       at android.view.ViewRootImpl$ConsumeBatchedInputRunnable.run(ViewRootImpl.java:7872)
       at android.view.Choreographer$CallbackRecord.run(Choreographer.java:911)
       at android.view.Choreographer.doCallbacks(Choreographer.java:723)
       at android.view.Choreographer.doFrame(Choreographer.java:652)
       at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:897)
       at android.os.Handler.handleCallback(Handler.java:789)
       at android.os.Handler.dispatchMessage(Handler.java:98)
       at android.os.Looper.loop(Looper.java:164)
       at android.app.ActivityThread.main(ActivityThread.java:6944)
       at java.lang.reflect.Method.invoke(Method.java)
       at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:327)
       at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1374)

[kmagiera]

Hey @EugeneDraitsev – judging by the stacktrace it seem to be a different issue. Mind making a small reproducable demo of the crash and opening a new issue for it?

[AugustoAleGon]

@kmagiera that would be great!