GridView--集合视图

public class GirdViewActivity extends Activity implements AdapterView.OnItemClickListener {

    private GridView gridView;
    private SimpleAdapter simpleAdapter;
    private List<Map<String,Object>> dataList;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_gird);

        gridView = (GridView)findViewById(R.id.gridView);
        //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});
        gridView.setAdapter(simpleAdapter);
        gridView.setOnItemClickListener(this);
    }

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

        for (int i = 0;i<12;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 = gridView.getItemAtPosition(position)+"";
        Toast.makeText(this,"position = "+position+" text"+text,Toast.LENGTH_SHORT).show();
    }
}