ValueAnimatorActivity.java 文件源码

/**
 * 自由落体
 * 
 * @param view
 */
public void verticalRun(View view)
{
    ValueAnimator animator = ValueAnimator.ofFloat(0, mScreenHeight
            - mBlueBall.getHeight());
    //animator.setTarget(mBlueBall);
    animator.setDuration(1000).start();
    animator.setInterpolator(new BounceInterpolator());
    animator.addUpdateListener(new AnimatorUpdateListener()
    {
        @Override
        public void onAnimationUpdate(ValueAnimator animation)
        {
            mBlueBall.setTranslationY((Float) animation.getAnimatedValue());
        }
    });
}