1.setAnimation和startAnimation区别

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。

[java]
<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。
[java]
/**
 * 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

补充：移动开发 , Android ,

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