scrollview嵌套ExpandableListView、ListView导致显示高度不全

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在原理上,和scrollivew嵌套listview高度显示不全是同样的处理办法。

一、自定义一个类继承ListView,重写onMeasure()方法,计算listview的高度。

public class CustomExpandableListView extends ExpandableListView {    public CustomExpandableListView(Context context, AttributeSet attrs) {        super(context, attrs);        // TODO Auto-generated constructor stub    }    @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);    }}


二、计算listivew自孩子的高度,在setAdapter之后调用。方法如下:

public void setListViewHeightBasedOnChildren(ListView listView) {        ListAdapter listAdapter = listView.getAdapter();        if (listAdapter == null) {            return;        }        int totalHeight = 0;        for (int i = 0; i < listAdapter.getCount(); i++) {            View listItem = listAdapter.getView(i, null, listView);            listItem.measure(0, 0);            totalHeight += listItem.getMeasuredHeight();        }        ViewGroup.LayoutParams params = listView.getLayoutParams();        params.height = totalHeight                + (listView.getDividerHeight() * (listAdapter.getCount() - 1));        listView.setLayoutParams(params);    }

实际测试发现,对于ListView来说,使用第二种方法更为简单,对于ExpandableListView则是第一种方法更为简单,因为对于ExpandableListView来说,还需要设置setOnGroupClickListener和onclapse等方法中添加计算高度的方法

参考文章http://blog.csdn.net/swust_chenpeng/article/details/17413955
http://www.cnblogs.com/supersugar/archive/2012/03/22/2411874.html
http://www.cnblogs.com/tittles0k/p/5630760.html

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