WelcomeSnowActy.java 文件源码

private Animation createAnimation(int top, AnimationListener l) {
    AnimationSet set = new AnimationSet(false);
    set.addAnimation(startAlpha());
    set.addAnimation(startScale());
    int duration = (int) (Math.random() * 10000 + 3000);
    set.addAnimation(randomRotate(duration));
    set.addAnimation(randomScale());
    set.addAnimation(endScale(duration));
    //添加的顺序很重要，TranslateAnimation必须在ScaleAnimation的后面，否则会出现奇怪的现象
    set.addAnimation(randomTranslate(top, duration, l));
    set.addAnimation(randomTranslateX());
    set.addAnimation(endAlpha(duration));
    return set;
}