AnimationService.java 文件源码

/**
 * For the Activity Circle Icon and text
 */

public static AnimationSet startAlphaRevealAnimation(final View VIEW) {
    final int ANIMATION_DURATION = 1000;

    final Animation mShowViewAnimation = new AlphaAnimation(0f, 1f);
    mShowViewAnimation.setDuration(ANIMATION_DURATION);

    AnimationSet mAnimations = new AnimationSet(true);
    mAnimations.setInterpolator(new AccelerateDecelerateInterpolator());
    mAnimations.addAnimation(mShowViewAnimation);
    mAnimations.setFillAfter(true);

       if(VIEW != null)
        VIEW.startAnimation(mAnimations);

    return mAnimations;
}