Android - Shared element transitions with calling activity finish()

Question

I'm working on making an application more Material and I'm just stuck on how to implement some shared element transitions. I have an activity A that starts another B and then calls finish() in order to remove it from the back stack. In my case I have an element I want to share between the two activities, but once it is passed from A to B, A no longer matters. If I don't call finish() after startActivity(ctx,intent, bundle) the exit/enter animation works perfectly. However, if I do call finish, there's a really ugly flicker before the animation starts.

Is there something I'm overlooking or is it just not possible to do what I am trying to do?

Answer 1

You can finish your activity in the onStop function, if you only want this to happen when you transition from A to B then create a flag and set it after you call startActivity(ctx,intent, bundle):

@Override
public void onStop() {
    super.onStop();
    if(mShouldFinish)
         finish();
}

Make sure when you are done with activity B to call finish() and not finishAfterTranstion() since activity A is no longer there

After finishing the activity A, shared element in B might hang in screen if you press back. Set transitionName to null in ActivityB.onEnterAnimationComplete to avoid this.

Answer 2

UPDATE

Much better and simpler way

ActivityCompat. finishAfterTransition(this);

<3 support library.

Answer 3

This is maybe late but I had the same issue. What worked for me is:

supportFinishAfterTransition();

This is included in the support library and works like charm.

PS: you don't needto call finish() when you call supportFinishAfterTransition() .

Answer 4

Try out finishAfterTransition() method in 5.0 and above you can finish the activity after the exit transition occurs.

Answer 5

If you use ActivityOptions.makeSceneTransitionAnimation(Activity, android.view.View, String) to make your transition you should use its callback method in Activity B to finish Activity A.

    setEnterSharedElementCallback(new SharedElementCallback() {
        @Override
        public void onSharedElementEnd(List<String> sharedElementNames, List<View> sharedElements, List<View> sharedElementSnapshots) {
            super.onSharedElementEnd(sharedElementNames, sharedElements, sharedElementSnapshots);
                // finish Activity A

        }
    });