Android重绘ListView高度

工具类

package ……;

import android.view.View;

import android.view.ViewGroup;

import android.widget.ListAdapter;

import android.widget.ListView;

/**

 * Created by kongqw on 2015/11/25.

 */

public final class ListViewUtil {

    private ListViewUtil() {

    }

    public static void setListViewHeightBasedOnChildren(ListView listView) {

        try {

            // 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);

        } catch (Exception e) {

            e.printStackTrace();

        }

    }

}

使用

……

mLvOutputs = (ListView) findViewById(R.id.lv_outputs);

……

TransactionOutputsAdapter transactionOutputsAdapter = new TransactionOutputsAdapter(this, transactionInfo.getData().getOut());

mLvOutputs.setAdapter(transactionOutputsAdapter);

// 重新计算Listview高度

ListViewUtil.setListViewHeightBasedOnChildren(mLvOutputs);