让Android AnimatorSet停止制作动画

时间:2014-08-11 23:33:55

标签: android objectanimator

我有以下AnimatorSet方法:

private AnimatorSet dialCenterThrob() {
    int bpm = workoutStream.getHeartRate();
    dialCenterImageView.clearAnimation();
    AnimatorSet finalSet = new AnimatorSet();

    ObjectAnimator pulseX = ObjectAnimator.ofFloat(dialCenterImageView, View.SCALE_X, 0.98f, 1.06f);
    ObjectAnimator pulseY = ObjectAnimator.ofFloat(dialCenterImageView, View.SCALE_Y, 0.98f, 1.06f);

    pulseX.setRepeatMode(ObjectAnimator.REVERSE);
    pulseX.setRepeatCount(ObjectAnimator.INFINITE);
    pulseY.setRepeatMode(ObjectAnimator.REVERSE);
    pulseY.setRepeatCount(ObjectAnimator.INFINITE);
    pulseX.setDuration(bpm);
    pulseY.setDuration(bpm);
    pulseX.setInterpolator(new AccelerateInterpolator());
    pulseY.setInterpolator(new AccelerateInterpolator());

    finalSet.playTogether(pulseX, pulseY);

    return finalSet;
}

这是在var上设置的,称为throbber,偶尔会通过此方法更新:

private void updateThrobbing() {
    if (hasThrob()) {
        throbber = dialCenterThrob();
        throbber.start();
    } else {
        if (throbber != null && throbber.isRunning()) {
            stopThrobbing();
        }
    }
}

但是我不能让它停止动画,这是目前尝试这样做的方法:

public void stopThrobbing() {
    List<Animator> throbbers = throbber.getChildAnimations();
    for(Animator animator : throbbers) {
        //accomplishes nothing
        ((ObjectAnimator)animator).setRepeatCount(0);
        ((ObjectAnimator)animator).setRepeatMode(0);
    }

    throbber.pause(); //nothing
    throbber.cancel(); //and again, nothing
    throbber.end();//shocking, I know, but really, nothing
    throbber = null;//you'd think this would definitely do it, but no
    //desparate attempt, in vein, of course
    dialCenterImageView.clearAnimation();
}

我无法让它停止制作动画。更新:我只是尝试将本地参考存储到各个对象动画师,然后调用setRepeatCount,mode,pause,end,取消每个,仍然没有。

2 个答案:

答案 0 :(得分:24)

  

dialCenterImageView.clearAnimation();

这对ObjectAnimator创建的动画有无影响。您只能通过startAnimation()

清除已在视图上启动的动画
findViewById(R.id.yourViewId).startAnimation(yourAnimation);
findViewById(R.id.yourViewId).clearAnimation();
  

任何对象动画师或者设置为无限的repeatCount的动画师都不会停止,无论你做什么,都不会离开视图。

是的!今天学到了这个艰难的道路。所以会增加我的两分钱。您需要存储ObjectAnimator实例的引用,然后在其上调用cancel()

我在旋转你的Android手机屏幕后仍然继续动画时遇到了这种情况,在这种情况下你的活动基本上是用新的布局重新创建的。

所以这就是我做的事情

@Override
protected void onSaveInstanceState(Bundle outState) {
    super.onSaveInstanceState(outState);
    ObjectAnimator buttonOneObjectAnimator = myOnClickListener.getButtonOneColorAnim();
    if(buttonOneObjectAnimator != null)
        buttonOneObjectAnimator.cancel();
}

您也可以在onPause()中完成此操作。

另一个需要注意的重点。如果您在start()实例 n次上致电ObjectAnimator,则必须致电cancel() n次才能完全停止动画

此外,如果您添加了AnimatorSet个侦听器,请确保在调用cancel之前删除了侦听器。

yourAnimatorSet.removeAllListeners();
yourAnimatorSet.end();
yourAnimatorSet.cancel();

答案 1 :(得分:1)

这里的回复很晚,但是,我做了什么,不是因为谷歌留下了半生不熟的习惯,就是在其标签中传递视图的ObjectAnimator实例,需要按顺序知道能够阻止它。

示例在视图上启动/取消无限旋转...

private void rotateStart(View view) {
    ObjectAnimator animator = ObjectAnimator.ofFloat(view, "rotation", 0f, 360f);
    // set animator instance as view's tag
    view.setTag(animator); 
    animator.setDuration(800);
    animator.setRepeatMode(ObjectAnimator.RESTART);
    animator.setRepeatCount(ObjectAnimator.INFINITE);
    animator.start();
}

private void rotateCancel(View view) {
    // get view's tag, which is its animator instance
    ObjectAnimator animator = (ObjectAnimator) view.getTag();
    if (animator != null) {
        animator.cancel();
    }
}

我认为无论是单个动画还是一组,都可以胜任。