DownloadProgressButton.java 文件源码

public ArrayList<ValueAnimator> createBallJumpAnimators() {
    ArrayList<ValueAnimator> animators = new ArrayList<>();
    int[] delays = new int[]{70, 140, 210};
    for (int i = 0; i < 3; i++) {
        final int index = i;
        ValueAnimator scaleAnim = ValueAnimator.ofFloat(mTextBottomBorder, mTextBottomBorder - mBallRadius * 2, mTextBottomBorder);
        scaleAnim.setDuration(600);
        scaleAnim.setRepeatCount(-1);
        scaleAnim.setStartDelay(delays[i]);
        scaleAnim.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
            @Override
            public void onAnimationUpdate(ValueAnimator animation) {
                translateYFloats[index] = (float) animation.getAnimatedValue();
                postInvalidate();
            }
        });
        animators.add(scaleAnim);
    }
    return animators;
}