Android開發工具類（各種方法調用 ）

ListView中嵌套ListView，動態計算內層ListView的高度。但是子ListView的每個Item必須是LinearLayout，不能是其他的，因爲其他的Layout(如RelativeLayout)沒有重寫onMeasure()，所以會在onMeasure()時拋出異常。
public class Utility {
    public static void setListViewHeightBasedOnChildren(ListView listView) {
        ListAdapter listAdapter = listView.getAdapter();
        if (listAdapter == null) {
            // pre-condition
            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);
    }
}