有时候项目里面需要ScrollView嵌套ListView,但是正常下ListView只会显示一行多一点，解决方法就是填充ListView数据后重新计算ListView的高度，这里有两种方法来实现。
第一种方法：重写ListView
- package com.jwzhangjie.test;
-
- import android.content.Context;
- import android.util.AttributeSet;
- import android.widget.ListView;
-
- public class MyListView extends ListView{
-
- public MyListView(Context context) {
- super(context);
- }
- public MyListView(Context context, AttributeSet attrs) {
- super(context, attrs);
- }
-
- @Override
- protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec) {
- int expandSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2,
- MeasureSpec.AT_MOST);
- super.onMeasure(widthMeasureSpec, expandSpec);
- }
- }
第二种方法：添加完数据后计算ListView中所有Item的高度和间隔线的高度然后重新设置ListView的高度
- public void setListViewHeightBasedOnChildren(ListView listView) {
- ListAdapter listAdapter = listView.getAdapter();
- if (listAdapter == null)
- return;
- if (listAdapter.getCount() <= 1)
- return;
-
- int totalHeight = 0;
- View view = null;
- for (int i = 0; i < listAdapter.getCount(); i++) {
- view = listAdapter.getView(i, null, listView);
- view.measure(0,0);
- totalHeight += view.getMeasuredHeight();
- }
- ViewGroup.LayoutParams params = listView.getLayoutParams();
- params.height = totalHeight
- + (listView.getDividerHeight() * (listAdapter.getCount() - 1));
- listView.setLayoutParams(params);
- listView.requestLayout();
- }
设置完数据后，调用setListViewHeightBasedOnChildren(listview);
注意：ListView的item只能使用LinearLayout包含
