Android 动态获取ListView的高度

今天介绍一下怎么动态的获取listview的高度。看代码:

 

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);
            listItem.measure(
                    MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED),
                    MeasureSpec.makeMeasureSpec(0, MeasureSpec.UNSPECIFIED));
            totalHeight += listItem.getMeasuredHeight();
        }

        ViewGroup.LayoutParams params = listView.getLayoutParams();
        params.height = totalHeight
                + (listView.getDividerHeight() * (listAdapter.getCount() - 1));
        listView.setLayoutParams(params);
    }

使用这个代码来获取listview的高度,需要注意一下几个问题:

1、listview的item的根布局一定要是LinearLayout;

2、调用这个方法需要在适配器数据加载更新之后;代码如下:

mAdapter.notifyDataSetChanged();     Function.getTotalHeightofListView(mListView);

3、获取item的高度也可以用注释掉的代码,效果一样的。

原文地址:https://www.cnblogs.com/phj981805903/p/3230040.html