SharedElementTransition throughs exception sometimes on minimizing the app

Asked Oct 29 '18 at 06:28

Active Oct 29 '18 at 06:28

Viewed 52 times

I've implemented SharedElementTransition in my app. Animation opens from recyclerView item to a ViewPager of next activity. If user changes pages on next screen then based upon final position i change the scrollPosition in recyclerView too using 'reenter' method of activity. It is working fine mostly but sometimes when i start animation and then minimize the app then it through following exception and doesn't even point out the line so i'm unable to handle this exception.

NullPointerException: Attempt to invoke virtual method 'void android.view.ViewGroup.transformMatrixToLocal(android.graphics.Matrix)' on a null object reference

asked Oct 29 '18 at 06:28

Usman Rana

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refer https://stackoverflow.com/questions/26566385/shared-element-activity-transition-on-android-5 – sasikumar Oct 29 '18 at 06:32
Did you find a solution for this? – dazza5000 Dec 26 '18 at 17:44
yes, it was because when it tries to scroll to a recyclerView to a specific position and view was not created yet and you start transition, then it crashed. – Usman Rana Dec 27 '18 at 07:06

SharedElementTransition throughs exception sometimes on minimizing the app

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