ScaleAnimator.java 文件源码

@Override
public SkinAnimator apply(@NonNull View view, @Nullable final Action action) {
    this.targetView = view;
    preAnimator = ObjectAnimator.ofPropertyValuesHolder(targetView,
            PropertyValuesHolder.ofFloat("ScaleX",
                    1, 0),
            PropertyValuesHolder.ofFloat("ScaleY",
                    1, 0))
            .setDuration(PRE_DURATION * 3);
    preAnimator.setInterpolator(new LinearInterpolator());
    afterAnimator = ObjectAnimator.ofPropertyValuesHolder(targetView,
            PropertyValuesHolder.ofFloat("ScaleX",
                    0, 1),
            PropertyValuesHolder.ofFloat("ScaleY",
                    0, 1))
            .setDuration(AFTER_DURATION * 2);
    afterAnimator.setInterpolator(new OvershootInterpolator());

    preAnimator.addListener(new AnimatorListenerAdapter() {
        @Override
        public void onAnimationEnd(Animator animation) {
            super.onAnimationEnd(animation);
            if (action != null) {
                action.action();
            }
            afterAnimator.start();
        }
    });

    return this;
}