如何获得在XML中定义为wrap_content的可见性和高度已消失的视图的高度? [英] How get height of the a view with gone visibility and height defined as wrap_content in xml?

问题描述

我有一个具有Viewibility = gone和height = wrap_content的ListView，并且我需要它的高度才能制作展开动画.

I have a ListView with visibility=gone and height=wrap_content, and i need its height to can make an animation of expand.

我已经尝试过了:

view.measure(ViewGroup.LayoutParams.MATCH_PARENT, ViewGroup.LayoutParams.WRAP_CONTENT);
int height = view.getMeasuredHeight();

和

v.measure(View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED),
                View.MeasureSpec.makeMeasureSpec(0, View.MeasureSpec.UNSPECIFIED));
int height = view.getMeasuredHeight();

和

v.measure(View.MeasureSpec.makeMeasureSpec(ViewGroup.LayoutParams.MATCH_PARENT, View.MeasureSpec.UNSPECIFIED),
                View.MeasureSpec.makeMeasureSpec(ViewGroup.LayoutParams.WRAP_CONTENT, View.MeasureSpec.UNSPECIFIED));
int height = view.getMeasuredHeight();

但是它给了我一个较小的价值.

But it returned me a lesser value.

我正在尝试在onResume之后执行此操作.

I am trying to do this after onResume.

推荐答案

我发现的唯一方法是从可见的标头视图的宽度设置我的视图的宽度，然后下面的代码为我返回了正确的值./p>

The only way that i found was setting the width of the my view from width of a visible header view, then the below code returned me the right value.

int widthSpec = MeasureSpec.makeMeasureSpec(headerView.getWidth(), MeasureSpec.EXACTLY);
int heightSpec = MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED);
v.measure(widthSpec, heightSpec);
int height = v.getMeasuredHeight();

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