ObjectAnimator 动画后恢复初始状态

最新推荐文章于 2024-08-10 03:10:39 发布

原创最新推荐文章于 2024-08-10 03:10:39 发布 · 1w 阅读

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CC 4.0 BY-SA版权

本文详细介绍了在Android中如何对UI元素的位移、透明度、旋转和缩放等动画效果进行复位，并展示了如何取消AnimatorSet动画及自定义AnimatorListenerAdapter以监听动画取消状态。

位移后恢复状态：mMiddleAvatar.setTranslationX(0);

改变透明度之后恢复：mMiddleAvatar.setAlpha(1.0f);

旋转后恢复：mMiddleAvatar.setRotation(0);

缩放后恢复：

mMiddleAvatar.setScaleX(1.0f);
mMiddleAvatar.setScaleY(1.0f);

取消 AnimatorSet 动画：

if (mLastAnimatorSet != null) {
    mLastAnimatorSet.cancel();
}
这种取消会走 onAnimationEnd 回调

所以自定义一个 AnimatorListenerAdapter

public abstract class CancelAnimatorListenerAdapter extends AnimatorListenerAdapter {
    private boolean mCanceled = false;

    @Override
    public void onAnimationCancel(Animator animation) {
        super.onAnimationCancel(animation);
        mCanceled = true;
    }

    public boolean isCanceled() {
        return mCanceled;
    }
}

使用：

ObjectAnimator rightAvatarScaleXAnimator = ObjectAnimator.ofFloat(mRightAvatar, "scaleX", 1.03f, 1.0f);
ObjectAnimator rightAvatarScaleYAnimator = ObjectAnimator.ofFloat(mRightAvatar, "scaleY", 1.03f, 1.0f);
mLastAnimatorSet = new AnimatorSet();
mLastAnimatorSet.play(rightAvatarScaleXAnimator).with(rightAvatarScaleYAnimator);
mLastAnimatorSet.setDuration(100);
mLastAnimatorSet.start();
mLastAnimatorSet.addListener(new CancelAnimatorListenerAdapter() {
    @Override
    public void onAnimationEnd(Animator animation) {
        super.onAnimationEnd(animation);
        if (isCanceled()) {return;}
        if (mMiddleAvatar == null) { return; }
        mRightAvatar.setTranslationX(0);
        mRightAvatar.setAlpha(0.0f);
        mRightAvatar.setScaleX(1.0f);
        mRightAvatar.setScaleY(1.0f);
        mMiddleAvatar.setAlpha(1.0f);
        startMatchTipsAnimation();
    }
});