高度自适应的ListView

/**
 * 计算listview的高度加载到scrollview中
 * 
 */
public class MyListView extends ListView
{
 public MyListView(Context context)
 {
  super(context);
 }
 public MyListView(Context context, AttributeSet attrs)
 {
  super(context, attrs);
 }
 public MyListView(Context context, AttributeSet attrs, int defStyle)
 {
  super(context, attrs, defStyle);
 }
 @Override
 protected void onMeasure(int widthMeasureSpec, int heightMeasureSpec)
 {
  // TODO Auto-generated method stub
  int expandSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2,
    MeasureSpec.AT_MOST);
  super.onMeasure(widthMeasureSpec, expandSpec);
 }
}