public class ListviewUtil {
    
    public static void setListViewHeightBasedOnChildren(ListView listView) {
        // 獲取ListView對應的Adapter
        ListAdapter listAdapter = listView.getAdapter();
        if (listAdapter == null) {
            return;
        }
        int totalHeight = 0;
        // listAdapter.getCount()返回資料項的數目
        for (int i = 0; i < listAdapter.getCount(); i++) {
            View listItem = listAdapter.getView(i, null, listView);
            // 計運算元項View 的寬高
            listItem.measure(0, 0);
            // 統計所有子項的總高度
            totalHeight += listItem.getMeasuredHeight();
        }
        ViewGroup.LayoutParams params = listView.getLayoutParams();
        params.height = totalHeight + (listView.getDividerHeight() * (listAdapter.getCount() - 1));
        // listView.getDividerHeight()獲取子項間分隔符佔用的高度
        // params.height最後得到整個ListView完整顯示需要的高度
        listView.setLayoutParams(params);
    }

    public static int getheight(ListView listView) {
        ListAdapter listAdapter = listView.getAdapter();
        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();
        }
        return totalHeight;
    }

    public static void setGridViewHeightBasedOnChildren(GridView gridView) {
        // 獲取GridView對應的Adapter
        ListAdapter listAdapter = gridView.getAdapter();
        if (listAdapter == null) {
            return;
        }
        int rows;
        int columns = 0;
        int horizontalBorderHeight = 0;
        Class<?> clazz = gridView.getClass();
        try {
            //利用反射，取得每行顯示的個數
            Field column = clazz.getDeclaredField("mRequestedNumColumns");
            column.setAccessible(true);
            columns = (Integer) column.get(gridView);
            //利用反射，取得橫向分割線高度
            Field horizontalSpacing = clazz.getDeclaredField("mRequestedHorizontalSpacing");
            horizontalSpacing.setAccessible(true);
            horizontalBorderHeight = (Integer) horizontalSpacing.get(gridView);
        } catch (Exception e) {
            // TODO: handle exception
            e.printStackTrace();
        }
        //判斷資料總數除以每行個數是否整除。不能整除代表有多餘，需要加一行
        if (listAdapter.getCount() % columns > 0) {
            rows = listAdapter.getCount() / columns + 1;
        } else {
            rows = listAdapter.getCount() / columns;
        }
        int totalHeight = 0;
        for (int i = 0; i < rows; i++) {
            View listItem = listAdapter.getView(i, null, gridView);
            listItem.measure(0, 0);
            totalHeight += listItem.getMeasuredHeight();
        }
        ViewGroup.LayoutParams params = gridView.getLayoutParams();
        params.height = totalHeight + horizontalBorderHeight * (rows - 1);
        gridView.setLayoutParams(params);
    }
}
 

直接使用下列工具類，如果是巢狀listview呼叫ListviewUtil.setListViewHeightBasedOnChildren(listview);
如果是巢狀gridview呼叫ListviewUtil.setGridViewHeightBasedOnChildren(gridview);

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