Android SimpleAdapter

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public class MainActivity extends AppCompatActivity {    private static final String TAG = "test";    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        //1 找到控件        ListView lv = (ListView) findViewById(R.id.lv);        //1.1 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", "13888");        Map<String, String> map2 = new HashMap<String, String>();        map2.put("name", "赵云");        map2.put("phone", "110");        Map<String, String> map3 = new HashMap<String, String>();        map3.put("name", "貂蝉");        map3.put("phone", "123456");        Map<String, String> map4 = new HashMap<String, String>();        map4.put("name", "关羽");        map4.put("phone", "119");        //1.1 把map加入到集合中        data.add(map1);        data.add(map2);        data.add(map3);        data.add(map4);        //2 设置数据适配器 resource 我们定义的布局文件        //form map集合的键        SimpleAdapter adapter = new SimpleAdapter(getApplicationContext(), data, R.layout.item,                new String[]{"name", "phone"}, new int[]{R.id.tv_name, R.id.tv_phone});        //3 设置数据适配器        lv.setAdapter(adapter);    }
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