让listView gridView全部扩展开

public class NoScrollListView extends ListView {
    public NoScrollListView(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); 
   } 
}

这种方法时推荐的   重新计算高度方法不推荐