private void fixListViewHeight(ListView listView) {
			// TODO Auto-generated method stub
		      // 如果没有设置数据适配器，则ListView没有子项，返回。
	        ListAdapter listAdapter = listView.getAdapter();
	        int totalHeight = 0;
	        if (listAdapter == null) {
	            return;
	        }
	        for (int i = 0, len = listAdapter.getCount(); i < len; i++) {
	            View listViewItem = listAdapter.getView(i , null, listView);
	            // 计算子项View 的宽高
	            listViewItem.measure(0, 0);
	            // 计算所有子项的高度和
	            totalHeight += listViewItem.getMeasuredHeight();
	        }   

	        ViewGroup.LayoutParams params = listView.getLayoutParams();
	        // listView.getDividerHeight()获取子项间分隔符的高度
	        // params.height设置ListView完全显示需要的高度
	        params.height = totalHeight+ (listView.getDividerHeight() * (listAdapter.getCount() - 1));
	        listView.setLayoutParams(params);
		}