android - Performing action after fragment transaction animation is finished

Question

I want to set a buttons visibility after the animation is finished.

That's what calls the animation:

android.support.v4.app.FragmentTransaction fAnimation = this.getActivity().getSupportFragmentManager().beginTransaction();
fAnimation.setCustomAnimations(android.R.anim.slide_in_left, R.anim.pull_out_to_left);
if (this.isVisible()) {
    fAnimation.hide(this);
    fAnimation.commit();
}

// code that will be executed when the fragment is gone (after the animation is over)

Is there any way to attach a listener to know when my fragment is gone?

Answer 1

The Animators that @nmw implements in his answer were added in API Level 11 and will not work with Fragments as implemented by the Android support library.

To listen to Fragment animation events, I extended the support library's Fragment class and overrode onCreateAnimation, attaching a custom AnimationListener to the returned Animation object:

public class MyFragment extends android.support.v4.app.Fragment {

    private static final String TAG = "MyFragment";

    @Override
    public Animation onCreateAnimation(int transit, boolean enter, int nextAnim) {

        Animation anim = AnimationUtils.loadAnimation(getActivity(), nextAnim);

        anim.setAnimationListener(new AnimationListener() {

            @Override
            public void onAnimationStart(Animation animation) {
                Log.d(TAG, "Animation started.");
                // additional functionality 
            }

            @Override
            public void onAnimationRepeat(Animation animation) {
                Log.d(TAG, "Animation repeating.");
                // additional functionality
            }

            @Override
            public void onAnimationEnd(Animation animation) {
                Log.d(TAG, "Animation ended.");
                // additional functionality
            }
        });

        return anim;
    }
}