ListView调整高度

最新推荐文章于 2021-05-31 15:22:19 发布

原创最新推荐文章于 2021-05-31 15:22:19 发布 · 203 阅读

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本文介绍了一种自定义ListView的方法，通过重写onMeasure方法使ListView能够根据子项数量自动调整其高度，避免因项目过少而占用过多空间的问题。

listView 有时候项目太少占用空间太大，如何能够自动控制

自适用大小

package com.customcontrols;
public class NoScrollListView extends ListView
{
@Override
protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec)
{
super.onMeasure(widthMeasureSpec, MeasureSpec.makeMeasureSpec(MeasureSpec.UNSPECIFIED, 0) );

// here I assume that height's being calculated for one-child only, seen it in ListView's source which is actually a bad idea
int childHeight = getMeasuredHeight() - (getListPaddingTop() + getListPaddingBottom() + getVerticalFadingEdgeLength() * 2);

int fullHeight = getListPaddingTop() + getListPaddingBottom() + childHeight*(getCount());

setMeasuredDimension(getMeasuredWidth(), fullHeight);
}
}