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Android Animations and Transitions The Transitions Framework Create a Custom Transition

Posted by Tinashe Mutematsaka
Tinashe Mutematsaka
9,087 Points

Now reverse the transition in onDisappear()! :)

Please do help me , i am stuck here !

AlphaScale.java 
public class AlphaScale extends Visibility {
    @Override
    public Animator onAppear(ViewGroup sceneRoot, View view, TransitionValues startValues, TransitionValues endValues) {
      return createAlphaScaleAnimator (view, 0, 1, 0, 1 );


    }

    @Override
    public Animator onDisappear(ViewGroup sceneRoot, View view, TransitionValues startValues, TransitionValues endValues) {
        return null;
    }

    private Animator createAlphaScaleAnimator(View view, float fromScale, float toScale, float fromAlpha, float toAlpha) {
        AnimatorSet set = new AnimatorSet();
        ObjectAnimator x = ObjectAnimator.ofFloat(view, View.SCALE_X, fromScale, toScale);
        ObjectAnimator y = ObjectAnimator.ofFloat(view, View.SCALE_Y, fromScale, toScale);
        ObjectAnimator alpha = ObjectAnimator.ofFloat(view, View.ALPHA, fromAlpha, toAlpha);
        set.playTogether(x, y, alpha);
        return set;
    }
}

1 Answer

Brenda Catherine Mugadza
Brenda Catherine Mugadza
3,708 Points
Brenda Catherine Mugadza
Brenda Catherine Mugadza
3,708 Points

to reverse the transition replace the return null with;

return createAlphaScaleAnimator(view,1,0,1,0);