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 fAni         


        

Answer 1

Combining the answers above here is a sample I am using successfully with the support library fragments.

Simply extend the MenuFragment and set the listener to get a callback of what to execute afterwards.

public class MenuFragment extends Fragment {

private WeakReference onMenuClosedListener;

@Override
public Animation onCreateAnimation(int transit, boolean enter, int nextAnim) {
    Animation anim = null;
    if (enter) {
        anim = AnimationUtils.loadAnimation(getActivity(), R.anim.anim_slide_in_top);
    } else {
        anim = AnimationUtils.loadAnimation(getActivity(), R.anim.anim_menu_slide_out_top);
        anim.setAnimationListener(new AnimationListener() {
            @Override public void onAnimationStart(Animation animation) {
            }
            @Override public void onAnimationRepeat(Animation animation) {
            }
            @Override public void onAnimationEnd(Animation animation) {
                onMenuClosed();
            }
        });
    }

    // NOTE: the animation must be added to an animation set in order for the listener
    // to work on the exit animation
    AnimationSet animSet = new AnimationSet(true);
    animSet.addAnimation(anim);

    return animSet;
}

private void onMenuClosed() {
    if (this.onMenuClosedListener != null) {
        OnMenuClosedListener listener = this.onMenuClosedListener.get();
        if (listener != null) {
            listener.onMenuClosed();
        }
    }
}

public void setOnMenuClosedListener(OnMenuClosedListener listener) {
    this.onMenuClosedListener = new WeakReference(listener);
}

/**
 * Callback for when the menu is closed.
 */
public static interface OnMenuClosedListener {

    public abstract void onMenuClosed();

}

}