Question

我想制作像多米诺骨牌效果一样的动画。但是当我使用动画xml和for循环的处理程序时，它同时一起工作。

如何制作多米诺骨牌效果动画，例如在第一个按钮（星期一）开始后100毫秒开始下一个按钮（星期二）的动画？

我的hanlder方法

private void startAnimation(final ArrayList<View> vArr)
{
    mon = (Button)findViewById(R.id.mon);
    tue = (Button)findViewById(R.id.tue);
    wed = (Button)findViewById(R.id.wed);
    thu = (Button)findViewById(R.id.thu);
    fri = (Button)findViewById(R.id.fri);
    sat = (Button)findViewById(R.id.sat);
    sun = (Button)findViewById(R.id.sun);

    final Button[] weekDayList = {mon, tue, wed, thu, fri, sat, sun};

    Handler handler = new Handler()
    {
        @Override
        public void handleMessage(Message msg)
        {
            super.handleMessage(msg);

            switch (msg.what)
            {
                case 3:
                    for (int i = 0; i < weekDayList.length; i++)
                        weekDayList[i].startAnimation(buttonDown);

                    sendEmptyMessageDelayed(4, 100);

                    break;

                case 4:

                    break;
            }
        }
    };

    handler.sendEmptyMessage(3);
}

我的动画片xml

<set xmlns:android="http://schemas.android.com/apk/res/android">

<scale
    android:fromXScale="1.0"
    android:toXScale="1.0"
    android:fromYScale="1.0"
    android:toYScale="0.0"
    android:pivotX="50%"
    android:pivotY="100%"
    android:duration="500" />
</set>

Answer 1

将AnimationListener设置为动画。使用onAnimationEnd()开始下一个动画。

Answer 2

您可以使用ObjectAnimator（自API 11起）执行此操作，并通过将所有动画添加到AnimatorSet来顺序播放动画。

  public void dominoAnimations() {
    ObjectAnimator monAnimation = ObjectAnimator.ofFloat(mon, "scaleY", 0f);
    ObjectAnimator tueAnimation = ObjectAnimator.ofFloat(tue, "scaleY", 0f);
    ObjectAnimator wedAnimation = ObjectAnimator.ofFloat(wed, "scaleY", 0f);
    ObjectAnimator thuAnimation = ObjectAnimator.ofFloat(thu, "scaleY", 0f);
    ObjectAnimator friAnimation = ObjectAnimator.ofFloat(fri, "scaleY", 0f);
    ObjectAnimator satAnimation = ObjectAnimator.ofFloat(sat, "scaleY", 0f);
    ObjectAnimator sunAnimation = ObjectAnimator.ofFloat(sun, "scaleY", 0f);

    AnimatorSet dominoes = new AnimatorSet();
    dominoes.playSequentially(
      monAnimation, tueAnimation, wedAnimation,
      thuAnimation, friAnimation, satAnimation, sunAnimation
    );

    dominoes.setDuration(500);
    dominoes.start();
  }

多米诺骨牌

2 个答案: