Android 动态获取ListView的高度

时间:2024-12-24 14:04:08
public static void setListViewHeightBasedOnChildren(ListView listView)
{
ListAdapter listAdapter = listView.getAdapter();
if (listAdapter == null)
{
// pre-condition
return;
}
int totalHeight = 0;
for (int i = 0; i < listAdapter.getCount(); i++)
{
View listItem = listAdapter.getView(i, null, listView);
// listItem.measure(0, 0);
listItem.measure( MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED), MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));
totalHeight += listItem.getMeasuredHeight();
}
ViewGroup.LayoutParams params = listView.getLayoutParams();
params.height = totalHeight + (listView.getDividerHeight() * (listAdapter.getCount() - 1));
listView.setLayoutParams(params);
}

  

使用这个代码来获取listview的高度,需要注意一下几个问题:
1、listview的item的根布局一定要是LinearLayout;
2、调用这个方法需要在适配器数据加载更新之后;
代码如下:
mAdapter.notifyDataSetChanged();
Function.getTotalHeightofListView(mListView);
3、获取item的高度也可以用注释掉的代码,效果一样的