Android 渐变动画效果

//透明度渐变
AlphaAnimation a = new AlphaAnimation(0.1f, 1.0f);
//设置动画时间
a.setDuration(5000);
content.setAnimation(a);　　//content为定义的view
a.setAnimationListener(new AnimationListener() {

@Override
public void onAnimationStart(Animation animation) {
// TODO Auto-generated method stub

}

@Override
public void onAnimationRepeat(Animation animation) {
// TODO Auto-generated method stub

}

@Override
public void onAnimationEnd(Animation animation) {
// TODO Auto-generated method stub

}
});

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Android 渐变动画效果

原文：http://www.cnblogs.com/fengyu9/p/3592075.html