ScanMusicActivity.java 文件源码

private void initAnimations() {
    searchAnimation = ValueAnimator.ofFloat(0f, 1f);
    searchAnimation.setDuration(50000);
    searchAnimation.setRepeatCount(ValueAnimator.INFINITE);
    searchAnimation.setRepeatMode(ValueAnimator.RESTART);
    searchAnimation.setInterpolator(new LinearInterpolator());
    searchAnimation.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
        @Override
        public void onAnimationUpdate(ValueAnimator valueAnimator) {
            float angle = (valueAnimator.getAnimatedFraction() * 360);
            ViewHelper.setTranslationX(ivSearch, (float) Math.sin(angle) * radius);
            ViewHelper.setTranslationY(ivSearch, (float) Math.cos(angle) * radius);
        }
    });


    scanAnimation = new TranslateAnimation(TranslateAnimation.RELATIVE_TO_PARENT, 0f, TranslateAnimation.RELATIVE_TO_PARENT, 0f, TranslateAnimation.RELATIVE_TO_PARENT, 0f, TranslateAnimation.RELATIVE_TO_PARENT, 0.61f);
    scanAnimation.setDuration(2000);
    scanAnimation.setRepeatCount(TranslateAnimation.INFINITE);
    scanAnimation.setRepeatMode(TranslateAnimation.RESTART);
}