安卓动画问题

Question

我想在 6 个球上播放比例(从 0 -> 1)动画，每个球的持续时间为 1000 毫秒。

并且每个动画都必须等待前一个动画 200 毫秒。

例如:

anim1.start -> 延迟 200ms -> anim2.start(当 anim1 正在播放时) -> .........

但我总是同时启动所有 6 个球的动画，我不知道为什么，可以

有人告诉我吗？？

// show animation.
    public void showBallAnimation(View v) {

        LinearLayout ll = (LinearLayout) findViewById(R.id.ball_container);

        RelativeLayout rl;

        ScaleAnimation scaleAnim1 = new ScaleAnimation(0.0f, 1.0f, 0.0f, 1.0f);
        scaleAnim1.setDuration(500);
        scaleAnim1.setStartOffset(0);
        scaleAnim1.setFillAfter(true);
        rl = (RelativeLayout) ll.getChildAt(0);
        rl.setVisibility(View.VISIBLE);
        rl.startAnimation(scaleAnim1);

        ScaleAnimation scaleAnim2 = new ScaleAnimation(0.0f, 1.0f, 0.0f, 1.0f);
        scaleAnim2.setDuration(500);
        scaleAnim2.setStartOffset(200);
        scaleAnim2.setFillAfter(true);
        rl = (RelativeLayout) ll.getChildAt(1);
        rl.setVisibility(View.VISIBLE);
        rl.startAnimation(scaleAnim2);

        ScaleAnimation scaleAnim3 = new ScaleAnimation(0.0f, 1.0f, 0.0f, 1.0f);
        scaleAnim3.setDuration(500);
        scaleAnim3.setStartOffset(400);
        scaleAnim3.setFillAfter(true);
        rl = (RelativeLayout) ll.getChildAt(2);
        rl.setVisibility(View.VISIBLE);
        rl.startAnimation(scaleAnim3);

        // Animation anim4 =
        // AnimationUtils.loadAnimation(getApplicationContext(),
        // R.anim.ball_scale4);
        ScaleAnimation scaleAnim4 = new ScaleAnimation(0.0f, 1.0f, 0.0f, 1.0f);
        scaleAnim4.setDuration(500);
        scaleAnim4.setStartOffset(600);
        scaleAnim4.setFillAfter(true);
        rl = (RelativeLayout) ll.getChildAt(3);
        rl.setVisibility(View.VISIBLE);
        rl.startAnimation(scaleAnim4);

    }

Answer 1

您应该将 r1.startAnimation(scaleAnimX) 更改为 r1.setAnimation(scaleAnimX)

调用 startAnimation() 将立即启动动画，忽略任何时间偏移或开始时间。

调用 setAnimation() 将考虑任何时间规范。