ListView用法

public class MainActivity extends Activity implements OnItemClickListener,
      OnScrollListener {

   private ListView listView;
   private SimpleAdapter simple_adapter;
   private List<Map<String, Object>> list;
   private int i=0;
   @Override
   protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);
      // 匹配布局文件中的ListView控件
      listView = (ListView) findViewById(R.id.listView);
     //数据适配器的数据源
      String[] data = new String[] { "java", "C++", "JavaScript", "Php",
            "Python" };
      //参数1：MainActivity:当前上下文
      //参数2：当前ListView加载的每一个列表项所对应的布局文件
      //参数3:数据源
      // 数据适配器的定义，并加载数据源
      ArrayAdapter<String> adapter = new ArrayAdapter<String>(
            MainActivity.this, android.R.layout.simple_list_item_1, data);
      // 给ListView设置数据适配器
       listView.setAdapter(adapter);
      // 设置ListView的元素被选中时的事件处理监听器
      listView.setOnItemClickListener(this);
//    getData();
      // 设置SimpleAdapter监听器
      //new String[]{}:代表数据源中键值对的键名
      new int []{}:代表键值对的id
//    simple_adapter = new SimpleAdapter(MainActivity.this,
//          list, R.layout.list_item,
//          new String[] { "image", "text" }, new int[] { R.id.image,
//                R.id.text });
//    listView.setAdapter(simple_adapter);
//    listView.setOnScrollListener(this);
   }

   // 加载SimpleAdapter数据集
   private List<Map<String, Object>> getData() {
      list = new ArrayList<Map<String, Object>>();
      Map<String, Object> map = new HashMap<String, Object>();
      map.put("text", "java");
      map.put("image", R.drawable.ic_launcher);
      Map<String, Object> map2 = new HashMap<String, Object>();
      map2.put("text", "C++");
      map2.put("image", R.drawable.ic_launcher);
      Map<String, Object> map3 = new HashMap<String, Object>();
      map3.put("text", "JavaScript");
      map3.put("image", R.drawable.ic_launcher);
      Map<String, Object> map4 = new HashMap<String, Object>();
      map4.put("text", "Php");
      map4.put("image", R.drawable.ic_launcher);
      Map<String, Object> map5 = new HashMap<String, Object>();
      map5.put("text", "Python2");
      map5.put("image", R.drawable.ic_launcher);
      list.add(map);
      list.add(map2);
      list.add(map3);
      list.add(map4);
      list.add(map5);
      return list;
   }

   @Override
   public boolean onCreateOptionsMenu(Menu menu) {
      // Inflate the menu; this adds items to the action bar if it is present.
      getMenuInflater().inflate(R.menu.main, menu);
      return true;
   }

   // (5)事件处理监听器方法
   @Override
   public void onItemClick(AdapterView<?> parent, View view, int position,
         long id) {
      // TODO Auto-generated method stub
      // 获取点击ListView item中的内容信息
      String text = listView.getItemAtPosition(position) + "";
      // 弹出Toast信息显示点击位置和内容
      Toast.makeText(MainActivity.this, "position=" + position + " content=" + text,Toast.LENGTH_SHORT).show();

   }

   @Override
   public void onScrollStateChanged(AbsListView view, int scrollState) {
      // TODO Auto-generated method stub
      // 手指离开屏幕前，用力滑了一下
      if (scrollState == SCROLL_STATE_FLING) {
         Toast.makeText(MainActivity.this, "用力滑一下",Toast.LENGTH_SHORT).show();
         Map<String, Object> map = new HashMap<String, Object>();
         map.put("text", "滚动添加 "+i++);
         map.put("image", R.drawable.ic_launcher);
         list.add(map);
         listView.setAdapter(simple_adapter);
         //重新通知线程刷新UI界面
         simple_adapter.notifyDataSetChanged();
      } else
      // 停止滚动
      if (scrollState == SCROLL_STATE_IDLE) {

      } else
      // 正在滚动,手指没有离开屏幕
      if (scrollState == SCROLL_STATE_TOUCH_SCROLL) {

      }
   }

   @Override
   public void onScroll(AbsListView view, int firstVisibleItem,
         int visibleItemCount, int totalItemCount) {
      // TODO Auto-generated method stub

   }

}