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App will crash when I navigate to different view from the view containing animation, exit the app with back button and relaunch the app. This started happening after Xamarin.Forms update to 1.4.3. It exists on 1.4.4 as well.
at --- End of managed exception stack trace ---
at java.lang.RuntimeException: java.lang.reflect.InvocationTargetException
at at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1107)
at at dalvik.system.NativeStart.main(Native Method)
at Caused by: java.lang.reflect.InvocationTargetException
at at java.lang.reflect.Method.invokeNative(Native Method)
at at java.lang.reflect.Method.invoke(Method.java:515)
at at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1291)
at ... 2 more
at Caused by: md52ce486a14f4bcd95899665e9d932190b.JavaProxyThrowable: System.ArgumentException: 'jobject' must not be IntPtr.Zero.
at Parameter name: jobject
at Android.Runtime.JNIEnv.CallVoidMethod (intptr,intptr) [0x00010] in /Users/builder/data/lanes/1879/5f55a9ef/source/monodroid/src/Mono.Android/src/Runtime/JNIEnv.g.cs:546
at Android.Animation.Animator.Cancel () [0x00043] in /Users/builder/data/lanes/1879/5f55a9ef/source/monodroid/src/Mono.Android/platforms/android-19/src/generated/Android.Animation.Animator.cs:839
at at Xamarin.Forms.Platform.Android.AndroidTicker.DisableTimer () <IL 0x00006, 0x00053>
at at Xamarin.Forms.Ticker.Disable () <IL 0x0000c, 0x00083>
at at Xamarin.Forms.Ticker.SendSignals (int) <IL 0x000bc, 0x00683>
at at Xamarin.Forms.Platform.Android.AndroidTicker.<.ctor>b__0 (object,Android.Animation.ValueAnimator/AnimatorUpdateEventArgs) <IL 0x00002, 0x0004f>
at Android.Animation.ValueAnimator/IAnimatorUpdateListenerImplementor.OnAnimationUpdate (Android.Animation.ValueAnimator) [0x0000d] in /Users/builder/data/lanes/1879/5f55a9ef/source/monodroid/src/Mono.Android/platforms/android-19/src/generated/Android.Animation.ValueAnimator.cs:136
at Android.Animation.ValueAnimator/IAnimatorUpdateListenerInvoker.n_OnAnimationUpdate_Landroid_animation_ValueAnimator_ (intptr,intptr,intptr) [0x00011] in /Users/builder/data/lanes/1879/5f55a9ef/source/monodroid/src/Mono.Android/platforms/android-19/src/generated/Android.Animation.ValueAnimator.cs:85
at at (wrapper dynamic-method) object.c231dd54-390e-4438-a7c0-aefdc92c08d0 (intptr,intptr,intptr) <IL 0x00017, 0x00043>
at at mono.android.animation.ValueAnimator_AnimatorUpdateListenerImplementor.n_onAnimationUpdate(Native Method)
at at mono.android.animation.ValueAnimator_AnimatorUpdateListenerImplementor.onAnimationUpdate(ValueAnimator_AnimatorUpdateListenerImplementor.java:29)
at at android.animation.ValueAnimator.animateValue(ValueAnimator.java:1251)
at at android.animation.ValueAnimator.animationFrame(ValueAnimator.java:1175)
at at android.animation.ValueAnimator.doAnimationFrame(ValueAnimator.java:1216)
at at android.animation.ValueAnimator$AnimationHandler.doAnimationFrame(ValueAnimator.java:637)
at at android.animation.ValueAnimator$AnimationHandler.run(ValueAnimator.java:660)
at at android.view.Choreographer$CallbackRecord.run(Choreographer.java:813)
at at android.view.Choreographer.doCallbacks(Choreographer.java:613)
at at android.view.Choreographer.doFrame(Choreographer.java:582)
at at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:799)
at at android.os.Handler.handleCallback(Handler.java:733)
at at android.os.Handler.dispatchMessage(Handler.java:95)
at at android.os.Looper.loop(Looper.java:146)
at at android.app.ActivityThread.main(ActivityThread.java:5694)
at ... 5 more
Thanks for submitting this bug. We give priority to bugs with attached
reproductions so if you could you please zip up your project and upload it as
an attachment to the bug that would expedite resolution of your issue. If you're able to strip out functionality that is not needed to reproduce the issue that would also aid in our investigation.
I am animating a button using this code behind logic: When I leave the view containing this animated button by hitting back button and relaunch the app to get to the same view, it crashes every single time.
void AnimateButton (Button button)
animation= new Animation ((double f) => button.Scale = f, button.Scale, 0.85,
animation.Commit(button, "ScaleTo", 16, 1000, Easing.SpringIn,
delegate(double f, bool a)
button.Scale = 1.0;
() => button.IsVisible
I tried to abort animation on OnDisappearing() with these methods:
The frequency of crash was decreased from every single time to every 4-5 repetition of exiting app and relaunching it.
If I remove the animation from view, there is no issue.
Have you find out a fix ? I'm stuck on the exact same problem…
I'm having a similar issue. This is only happening on Android. I created a thread here: https://forums.xamarin.com/discussion/58006/proper-way-to-abort-animation#latest
For repro, use Ashok's sample and animate a random button. This is happening on 18.104.22.16892-pre1.
In my use case, hitting the Back button and re-launching the app will crash the app if the current page has an animation (It doesn't have to be like Ashok's multi-page setup). My home screen has an animation. Perhaps the animation object is not being properly destroyed?
Handling OnDisappearing helps, but it's useless if the app is re-launched immediately after it's killed.
This is happening in our product as well. What should we do? All of the information seems to be there, so the status should be changed from NEEDINFO soon.
Thank you for taking the time to submit this report. After reviewing the description of this bug, we believe it no longer affects the current version of Xamarin.Forms. If you are still experiencing the issue after updating your packages, please reopen this report with an attached reproduction.
For your convenience, we have created some reproduction best practices viewable here: https://gist.github.com/jassmith/92405c300e54a01dcc6d
Xamarin Forms Team