ListView

public class SecondActivity extends Activity implements AdapterView.OnItemClickListener,AbsListView.OnScrollListener{

    private ListView listView;
    private ArrayAdapter<String>arrayAdapter;
    private SimpleAdapter simpleAdapter;
    private List<Map<String,Object>> dataList;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_second);

        listView = (ListView)findViewById(R.id.listView);

        /* ArrayAdapter
        //1.新建一个数据适配器
        //2.适配器加载数据源
        //3.视图加载适配器
        String[]arr_data = {"测试1","测试2","测试3","测试4","测试5"};
        //ArrayAdapter(上下文,布局文件,数据源)
        arrayAdapter = new ArrayAdapter<String>(this,android.R.layout.simple_list_item_1,arr_data);
        listView.setAdapter(arrayAdapter);
        */


        //SimpleAdapter
        /*
        * context:上下文
        * data:数据源(List<? extends Map<String,?>>data) 一个map组成的list集合
        * resource:列表项的布局文件ID
        * from:Map中的键名
        * to:绑定数据视图中的ID,与from成对应关系
        * */
        dataList = new ArrayList<Map<String, Object>>();
        simpleAdapter = new SimpleAdapter(this,getData(),R.layout.cell,new String[]{"cellpic","celltext"},new int[]{R.id.cellpic,R.id.celltext});
        listView.setAdapter(simpleAdapter);
        listView.setOnItemClickListener(this);
        listView.setOnScrollListener(this);
    }

    private List<Map<String,Object>>getData(){

        for (int i=0;i<20;i++){
            Map<String,Object>map = new HashMap<String,Object>();
            map.put("cellpic",R.drawable.icon);
            map.put("celltext","测试"+i);
            dataList.add(map);
        }

        return dataList;
    }

    @Override
    public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
        String text = listView.getItemAtPosition(position).toString(); //能够缩写listView.getItemAtPosition(position)+“”;
        Toast.makeText(this,"position = "+position+" text = "+text,Toast.LENGTH_SHORT).show();
    }

    @Override
    public void onScrollStateChanged(AbsListView view, int scrollState) {
        switch (scrollState){
            case SCROLL_STATE_FLING:
                System.out.print("用户手指离开屏幕,但屏幕继续减速滑动过程当中");
                //添加数据源
                Map<String,Object>map = new HashMap<String,Object>();
                map.put("cellpic",R.drawable.icon);
                map.put("celltext","增长项");
                dataList.add(map);
                //适配器刷新数据
                simpleAdapter.notifyDataSetChanged();
                break;
            case SCROLL_STATE_IDLE:
                System.out.print("中止滑动");
                break;
            case SCROLL_STATE_TOUCH_SCROLL:
                System.out.print("正在滑动");
                break;
        }
    }

    @Override
    public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount) {

    }
}