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Android Animations and Transitions Animations Basics Choreograph an Animation

Finally, create a third set to play the first two sets one after another. The alpha and move animations should go first.

can someone explain to me.

ObjectAnimator fadeInAnimator = ObjectAnimator.ofFloat(button, View.ALPHA, 0, 1);

ObjectAnimator moveUpAnimator = ObjectAnimator.ofInt(button, "top", buttonTop, 16);

ObjectAnimator scaleXAnimator = ObjectAnimator.ofFloat(button, "scaleX", 1.0f, 1.5f);

ObjectAnimator scaleYAnimator = ObjectAnimator.ofFloat(button, "scaleY", 1.0f, 1.5f);

// Add code below!

AnimatorSet fadeAndMove = new AnimatorSet();
fadeAndMove.playTogether(fadeInAnimator , moveUpAnimator);

AnimatorSet scale = new AnimatorSet();
scale.playTogether(scaleYAnimator , scaleXAnimator);

AnimatorSet set = new AnimatorSet();
set.playSequentially(fadeAndMove, scale);