自定义Listview

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) { 

   int expandSpec = MeasureSpec.makeMeasureSpec(Integer.MAX_VALUE >> 2,     MeasureSpec.AT_MOST);

  super.onMeasure(widthMeasureSpec, expandSpec); 

}

}