如何从视图中获取动画

Question

我在适配器中的单击事件中设置了ProgressBar动画

ObjectAnimator animation = ObjectAnimator.ofInt(holder.progressbar, "progress", 0, 100);
animation.setDuration(PROGRESS_TIME);
animation.setInterpolator(new DecelerateInterpolator());
animation.addListener(new Animator.AnimatorListener() {

@Override
public void onAnimationStart(Animator animator) {
    Toast.makeText(context,"HELL_Start",Toast.LENGTH_SHORT).show();
}

@Override
public void onAnimationEnd(Animator animator) {
    //do something when the countdown is complete
    Toast.makeText(context,"HELL_OFF_END",Toast.LENGTH_SHORT).show();
}

@Override
public void onAnimationCancel(Animator animator) {
    Toast.makeText(context,"HELL_OFF_Cancel",Toast.LENGTH_SHORT).show();
}

@Override
public void onAnimationRepeat(Animator animator) { }
});

animation.start();

我试图从ProgressBar中获得动画(当列表项值被更改时)，方法是

AlphaAnimation animation = (AlphaAnimation)mProgressBar.getAnimation();

但是它正在返回null

Answer 1

可以将动画对象设置为关联视图的标记。

holder.progressbar.setTag(animation);

而不是稍后再检索：

ObjectAnimator animator = (ObjectAnimator) holder.progressBar.getTag();
// Do something with animator