ScrollView中嵌套ListView時顯示不全的解決方案

在ScrollView中嵌套ListView時，ListView只能顯示一行多一點.

經過驗證，簡單有效，在listview.setAdapter()之后調用Utility.setListViewHeightBasedOnChilren(listview)就Okay 了。

public class Utility {
    public static void setListViewHeightBasedOnChildren(ListView listView) {
            //獲取ListView對應的Adapter
        ListAdapter listAdapter = listView.getAdapter(); 
        if (listAdapter == null) {
            // pre-condition
            return;
        }

        int totalHeight = 0;
        for (int i = 0, len = listAdapter.getCount(); i < len; i++) {   //listAdapter.getCount()返回數據項的數目
            View listItem = listAdapter.getView(i, null, listView);
            listItem.measure(0, 0);  //計算子項View 的寬高
            totalHeight += listItem.getMeasuredHeight();  //統計所有子項的總高度
        }

        ViewGroup.LayoutParams params = listView.getLayoutParams();
        params.height = totalHeight + (listView.getDividerHeight() * (listAdapter.getCount() - 1));
        //listView.getDividerHeight()獲取子項間分隔符占用的高度
        //params.height最后得到整個ListView完整顯示需要的高度
        listView.setLayoutParams(params);
    }

}