http://stackoverflow.com/questions/10909865/setanimation-vs-startanimation-in-android

http://blog.csdn.net/wyhuan1030/article/details/7409869

 

设置一个动画播放这一观点。如果你想立即播放的动画，使用startAnimation这种方法提供了允许细粒度控制的起始时间和失效，

但你必须确保：1）动画开始时间 2）动画应该开始时的观点，将被视为无效。

<span id="result_box" lang="zh-CN"></span>
    /**
     * Sets the next animation to play for this view.
     * If you want the animation to play immediately, use
     * startAnimation. This method provides allows fine-grained
     * control over the start time and invalidation, but you
     * must make sure that 1) the animation has a start time set, and
     * 2) the view will be invalidated when the animation is supposed to
     * start.
     *
     * @param animation The next animation, or null.
     */
    public void setAnimation(Animation animation) {
        mCurrentAnimation = animation;
        if (animation != null) {
            animation.reset();
        }
    }

 

现在开始指定的动画。

 

/**
 * Start the specified animation now.
 *
 * @param animation the animation to start now
 */
public void startAnimation(Animation animation) {
    animation.setStartTime(Animation.START_ON_FIRST_FRAME);
    setAnimation(animation);
    invalidateParentCaches();
    invalidate(true);
}

建议使用

startAnimation来启动动画，setAnimation启动动画是需要条件的