关于ListView在ScrollView中只能显示一行数据的问题

/**
* 为了解决ListView在ScrollView中只能显示一行数据的问题
*
* @param listView
*/
public static void setListViewHeightBasedOnChildren(ListView listView) {
// 获取ListView对应的Adapter
ListAdapter listAdapter = listView.getAdapter();
if (listAdapter == null) {
return;
}

int totalHeight = 0;
for (int i = 0, len = listAdapter.getCount(); i < len; i++) { // listAdapter.getCount()返回数据项的数目
View listItem = listAdapter.getView(i, null, listView);
listItem.measure(0, 0); // 计算子项View 的宽高
totalHeight += listItem.getMeasuredHeight(); // 统计所有子项的总高度
}

ViewGroup.LayoutParams params = listView.getLayoutParams();
params.height = totalHeight
+ (listView.getDividerHeight() * (listAdapter.getCount() - 1));
// listView.getDividerHeight()获取子项间分隔符占用的高度
// params.height最后得到整个ListView完整显示需要的高度
listView.setLayoutParams(params);
}

import android.content.Context;
import android.util.AttributeSet;
import android.widget.ListView;

/**
* Created by zxf on 2016/10/17.
*/

public class AllListView extends ListView
{

public AllListView(Context context, AttributeSet attrs)
{
super(context, attrs);
}

public void onMeasure(int widthMeasureSpec, int heightMeasureSpec)
{
int mExpandSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2,
MeasureSpec.AT_MOST);
super.onMeasure(widthMeasureSpec, mExpandSpec);
}

}