安卓开发之SimpleAdapter的使用

package com.lidaochen.test;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.ListView;
import android.widget.SimpleAdapter;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class MainActivity extends AppCompatActivity {
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        // 找到ListView控件
        ListView listView = (ListView)findViewById(R.id.lv);
        // 准备ListView要显示的数据
        List<Map<String, String>> data = new ArrayList<Map<String, String >>();
        Map<String, String> map1 = new HashMap<String, String>();
        map1.put("name", "张飞");
        map1.put("phone", "13688888888");
        Map<String, String> map2 = new HashMap<String, String>();
        map2.put("name", "马云");
        map2.put("phone", "13777777777");
        Map<String, String> map3 = new HashMap<String, String>();
        map3.put("name", "刘强东");
        map3.put("phone", "13222222222");
        Map<String, String> map4 = new HashMap<String, String>();
        map4.put("name", "马化腾");
        map4.put("phone", "13666666666");
        // 将map加入到集合中
        data.add(map1);
        data.add(map2);
        data.add(map3);
        data.add(map4);
        // 创建一个SimpleAdapter
        SimpleAdapter simpleAdapter = new SimpleAdapter(this, data, R.layout.item,
                new String[]{"name", "phone"}, new int[]{R.id.tv_name, R.id.tv_phone});
        // 设置适配器
        listView.setAdapter(simpleAdapter);
    }
}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="horizontal">
    <TextView
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:id="@+id/tv_name"
        android:textSize="20sp"
        android:layout_weight="1"
        android:textColor="#d20606"/>
    <TextView
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:textSize="20sp"
        android:id="@+id/tv_phone"
        android:layout_weight="1"/>


</LinearLayout>