android为listview计算出实际需要的高度

计算出一个listview需要的高度

方法封装好了可以用了，如下：

public void setListViewHeightBasedOnChildren(ListView listView1) {

        BaseAdapter listAdapter = (BaseAdapter) listView1.getAdapter();
        if (listAdapter == null) {
            return;
        }
        int totalHeight = 0;
        for (int i = 0; i < listAdapter.getCount(); i++) {
            View listItem = listAdapter.getView(i, null, listView1);
            listItem.measure(0, 0);
            totalHeight += listItem.getMeasuredHeight();
        }
        ViewGroup.LayoutParams params = listView1.getLayoutParams();
        params.height = totalHeight
                + (listView1.getDividerHeight() * (listAdapter.getCount() + 1));
        listView1.setLayoutParams(params);
    }