Android ScrollView嵌套ListView问题

自定义ListView，重写onMeasure方法

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

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);  
        }  
}