Android 用动画缩放图像视图

Question

我有一个 ImageView，想用动画将它缩小。我用

<?xml version="1.0" encoding="utf-8"?>
<set xmlns:android="http://schemas.android.com/apk/res/android"
    android:interpolator="@android:anim/linear_interpolator">
    <scale
        android:fromXScale="1.0"
        android:toXScale="0.7"
        android:fromYScale="1.0"
        android:toYScale="0.7"
        android:pivotX="50%"
        android:pivotY="10%"
        android:duration="1500" />
</set>

这很好用。但在动画完成后，图像会恢复到原来的大小。有什么想法吗？

Answer 1

试试这个代码，它不会在动画后重置图像大小，这里的视图是你想要动画的图像视图。

ObjectAnimator scaleDownX = ObjectAnimator.ofFloat(view, "scaleX", 0.5f);
ObjectAnimator scaleDownY = ObjectAnimator.ofFloat(view, "scaleY", 0.5f);
scaleDownX.setDuration(1000);
scaleDownY.setDuration(1000);

AnimatorSet scaleDown = new AnimatorSet();
scaleDown.play(scaleDownX).with(scaleDownY);

scaleDown.start();

Answer 2

好的，我找到了解决办法。这是正确的吗？还是又快又脏？ ^^

    ObjectAnimator scaleDownX = ObjectAnimator.ofFloat(image, "scaleX", 0.7f);
    ObjectAnimator scaleDownY = ObjectAnimator.ofFloat(image, "scaleY", 0.7f);
    scaleDownX.setDuration(1500);
    scaleDownY.setDuration(1500);

    ObjectAnimator moveUpY = ObjectAnimator.ofFloat(image, "translationY", -100);
    moveUpY.setDuration(1500);

    AnimatorSet scaleDown = new AnimatorSet();
    AnimatorSet moveUp = new AnimatorSet();

    scaleDown.play(scaleDownX).with(scaleDownY);
    moveUp.play(moveUpY);

    scaleDown.start();
    moveUp.start();

Answer 3

下面是一个更简单的答案；

imageview.animate().translationY(-200F).duration = 500
imageview.animate().scaleY(0.4F).duration = 500
imageview.animate().scaleX(0.4F).duration = 500

Android 用动画缩放图像视图

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