Nested fragments disappear during transition animation

Question

Here\'s the scenario: Activity contains fragment A, which in turn uses getChildFragmentManager() to add fragments A1 and A2

Answer 1

I was able to come up with a pretty clean solution. IMO its the least hacky, and while this is technically the "draw a bitmap" solution at least its abstracted by the fragment lib.

Make sure your child frags override a parent class with this:

private static final Animation dummyAnimation = new AlphaAnimation(1,1);
static{
    dummyAnimation.setDuration(500);
}

@Override
public Animation onCreateAnimation(int transit, boolean enter, int nextAnim) {
    if(!enter && getParentFragment() != null){
        return dummyAnimation;
    }
    return super.onCreateAnimation(transit, enter, nextAnim);
}

If we have an exit animation on the child frags, they will be animated instead of blink away. We can exploit this by having an animation that simply draws the child fragments at full alpha for a duration. This way, they'll stay visible in the parent fragment as it animates, giving the desired behavior.

The only issue I can think of is keeping track of that duration. I could maybe set it to a large-ish number but I'm afraid that might have performance issues if its still drawing that animation somewhere.