ListView使用SimpleAdapter显示数据

1、activity_main中加入控件Listview

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    tools:context=".MainActivity" >    <ListView        android:id="@+id/lv"        android:layout_width="match_parent"        android:layout_height="match_parent" /></RelativeLayout>2、创建lieview的item布局listview_item
<?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="vertical" >    <TextView        android:id="@+id/tv"        android:text="数据"        android:gravity="center"        android:layout_width="match_parent"        android:layout_height="40dp" /></LinearLayout>  这里就显示个文本
3、MainActivity代码：
	PRivate ListView lv;	private List<Map<String, Object>> list=new ArrayList<Map<String,Object>>();	@Override	protected void onCreate(Bundle savedInstanceState) {		super.onCreate(savedInstanceState);		setContentView(R.layout.activity_main);		lv=(ListView) findViewById(R.id.lv);		//listview加入数据		init();	}	private void init() {		for (int i = 0; i <50; i++) {			//存入map			Map<String , Object> map=new HashMap<String, Object>();			map.put("name", "数据"+i);						//添加到集合中			list.add(map);		}		//SimpleAdapter适配器用法，第一个参数上下文，第二个：数据，第三个:listview中的布局界面，第四个:刚刚Map里面存的name,第五个：就是把第四个的name显示到哪一个控件上		SimpleAdapter  sim=new SimpleAdapter(MainActivity.this, list, R.layout.listview_item, new String[]{"name"},new int[]{R.id.tv} );		lv.setAdapter(sim);		//判断点击了第几个listview的item		lv.setOnItemClickListener(new OnItemClickListener() {			@Override			public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,					long arg3) {				Toast.makeText(MainActivity.this, "点击了第"+arg2, Toast.LENGTH_SHORT).show();				}		});	}