Android ListView SimpleAdapter ArrayList 数据更新问题

private GridView myListView;

private SimpleAdapter mySimperAdapter;

private ArrayList<HashMap<String, Object>> myData;

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.position);

　　arrayList = new ArrayList<HashMap<String, Object>>();　//只能初始化一次 否者改变不了

}

public void SetData()

{

　　arrayList.clear(); //或者arrayList.removeAll(arrayList);

　　for(){

　　HashMap<String, Object> hashMap = new HashMap<String, Object>();

hashMap.put("1", "");

hashMap.put("2", "");

arrayList.add(hashMap);

　　}

}

private void Init()

{

mySimperAdapter = new SimpleAdapter(this, arrayList,

R.layout.main, new String[] {"1", "2"}, new int[]{R.id.li1, R.id.li2});

myListView.setAdapter(mySimperAdapter);

}

修改myData的数据以后，调用mySimpleAdapter.notifyDataChanged()就可以