Android属性动画：如何增加视图高度？ [英] Android property animation: how to increase view height?

问题描述

如何使用Android中的属性动画增加视图高度？

How to increase the view height using Property Animations in Android?

ObjectAnimator a = ObjectAnimator.ofFloat(viewToIncreaseHeight, "translationY", -100);
a.setInterpolator(new AccelerateDecelerateInterpolator());
a.setDuration(1000);
a.start();

translateY实际上会移动视图而不会增加高度。如何增加视图的高度？

The translationY actually moves the view not increase the height. How can I increase the height of the view?

推荐答案

ValueAnimator anim = ValueAnimator.ofInt(viewToIncreaseHeight.getMeasuredHeight(), -100);
anim.addUpdateListener(new ValueAnimator.AnimatorUpdateListener() {
    @Override
    public void onAnimationUpdate(ValueAnimator valueAnimator) {
        int val = (Integer) valueAnimator.getAnimatedValue();
        ViewGroup.LayoutParams layoutParams = viewToIncreaseHeight.getLayoutParams();
        layoutParams.height = val;
        viewToIncreaseHeight.setLayoutParams(layoutParams);
    }
});
anim.setDuration(DURATION);
anim.start(); 

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