Android ScrollView中嵌套ListView只显示一行的解决办法

Android编程中，ScrollView嵌套ListView时，会无法正确的计算ListView的大小。解决的办法如下：

（非原创，网上搜到的解决方法）

    public class MainActivity extends Activity {
        private ListView listView;
        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);
            listView = (ListView) findViewById(R.id.listView1);
            String[] adapterData = new String[] { "Afghanistan", "Albania",… … "Bosnia"};
            listView.setAdapter(new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,adapterData));
            setListViewHeightBasedOnChildren(listView);
        }
        public void setListViewHeightBasedOnChildren(ListView listView) {
            // 获取ListView对应的Adapter
            ListAdapter listAdapter = listView.getAdapter();
            if (listAdapter == null) {
                return;
            }   

            int totalHeight = 0;
            for (int i = 0, len = listAdapter.getCount(); i < len; i++) {
                // listAdapter.getCount()返回数据项的数目
                View listItem = listAdapter.getView(i, null, listView);
                // 计算子项View 的宽高
                listItem.measure(0, 0);
                // 统计所有子项的总高度
                totalHeight += listItem.getMeasuredHeight();
            }   

            ViewGroup.LayoutParams params = listView.getLayoutParams();
            params.height = totalHeight+ (listView.getDividerHeight() * (listAdapter.getCount() - 1));
            // listView.getDividerHeight()获取子项间分隔符占用的高度
            // params.height最后得到整个ListView完整显示需要的高度
            listView.setLayoutParams(params);
        }
    }