开发项目过程中基本都会用到listView的下拉刷新和上滑加载更多，为了方便重写的ListView来实现下拉刷新，同时添加了上拉自动加载更多的功能。
Android下拉刷新可以分为两种情况：
1.获取更多的数据，按服务器数据库时间顺序存储入情况，此刻我们是获取是显示在我们应用中的数据更早前的数据，这也是最常见的情况。比如（微博获取更多信息，就是获取更多更早前的信息，然后动态的添加到已有的数据的下方）；
2.获取更多的最新的数据，其实还是一种获取更多的操作方式。但是这里主要考虑到用户的操作习惯了。一般，用户的操作习惯分这么两种。
示例代码
```
public class MainActivity extends Activity implements IXListViewListener {
private XListView listView;
private int in = 6;
private Adapter adapter;
private Handler mHandler;
@Override
protected void onCreate(Bundle savedInstanceState) {
// TODO Auto-generated method stub
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
initView();
}
private void initView() {
// TODO Auto-generated method stub
listView = (XListView) findViewById(R.id.list);
listView.setPullLoadEnable(true);
adapter = new Adapter(MainActivity.this);
listView.setAdapter(adapter);
listView.setXListViewListener(this);
mHandler = new Handler();
}
private void onLoad() {
listView.stopRefresh();
listView.stopLoadMore();
listView.setRefreshTime("刚刚");
}
@Override
public void onRefresh() {
mHandler.postDelayed(new Runnable() {
@Override
public void run() {
onLoad();
}
}, 2000);
}
@Override
public void onLoadMore() {
mHandler.postDelayed(new Runnable() {
@Override
public void run() {
in += 4;
onLoad();
}
}, 2000);
}
private static String[] string = new String[] { "民政局于，请带好相关证件文书 ",
"财政部发布公告，由于资金调整信息未完善，下周在发放工资，请各位见谅",
"信息部门于2016-11-11日在某某地方开会，特此通知，请带好相关证件",
"党政办发放通知，有关贫困地区扶贫政策，希望每个部门做出相应的方案，于2016-11-11开会讨论" };
public class Adapter extends BaseAdapter {
private Context context;
private LayoutInflater inflater;
public Adapter(Context context) {
// TODO Auto-generated constructor stub
this.context = context;
inflater = LayoutInflater.from(context);
}
@Override
public int getCount() {
// TODO Auto-generated method stub
return in;
}
@Override
public Object getItem(int position) {
// TODO Auto-generated method stub
return position;
}
@Override
public long getItemId(int position) {
// TODO Auto-generated method stub
return position;
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
// TODO Auto-generated method stub
ViewHolder holder = null;
final int index = position;
if (convertView == null) {
convertView = inflater.inflate(R.layout.item_news_mass, null);
holder = new ViewHolder(convertView);
convertView.setTag(holder);
} else {
holder = (ViewHolder) convertView.getTag();
}
holder.mName.setText(string[(position % 4)]);
return convertView;
}
class ViewHolder {
private ImageView mImageView;
private TextView mName;
public ViewHolder(View view) {
mName = (TextView) view.findViewById(R.id.item_news_msg);
}
}
}
}
```
