androidのXlist框架上拉下拉刷新案例

androidのXlist框架上拉下拉刷新案例 （不含缓存的）

1. 今天看了项目中使用XListView, 方便以后使用，做个笔记记录。

案例源码可以加扣扣群：191974931 ，方便你的学习。





点击查看更多，即可刷新操作。

案例中使用listview 为

<me.maxwin.view.XListView
android:id="@+id/xListView"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:cacheColorHint="#00000000"
android:dividerHeight="1px" >
</me.maxwin.view.XListView>

首先要导入几个跟XlistView 相关的java代码。

上拉时候注意设置分页page =0. 再去查询。

下拉的时候page要实现page++， 进行分页查询。

这里数据是从服务器上获取的，详细代码如下：

public class MainActivity3 extends Activity implements IXListViewListener {
static final int MENU_MANUAL_REFRESH = 0;
static final int MENU_DISABLE_SCROLL = 1;
static final int MENU_SET_MODE = 2;
static final int MENU_DEMO = 3;
// private List<Yilin> mListItems;
private LinkedList<Comment> mListItems;
private PullToRefreshListView mPullRefreshListView;
private AIContentAdapter mAdapter;
private static final int LOADING = 1;
private static final int LOADING_COMPLETED = 2;
private static final int LOADING_FAILED = 3;
private static final int NORMAL = 4;

private XListView mListView;
public static final int FRIST_GET_DATE = 111;
public static final int REFRESH_GET_DATE = 112;
public static final int LOADMORE_GET_DATE = 113;
private static int page = 0;
private TextView textview;

private Handler handler = new Handler() {
@Override
public void handleMessage(Message msg) {
if (msg.what == 0) {
geneItems((Integer)msg.obj);
}
}
};

@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_ptr_list3);

textview=(TextView)findViewById(R.id.textview);
mListItems = new LinkedList<Comment>();
mListView = (XListView) findViewById(R.id.xListView);
mListView.setPullLoadEnable(true);
loaddata();
mAdapter = new AIContentAdapter(MainActivity3.this, mListItems);
mListView.setAdapter(mAdapter);
mListView.setXListViewListener(MainActivity3.this);
}

private void loaddata() {
new GetDataTask().execute(FRIST_GET_DATE);
}

private class GetDataTask extends
AsyncTask<Integer, Void, LinkedList<Comment>> {

@Override
protected LinkedList<Comment> doInBackground(Integer... params) {
// 处理完成后给handler发送消息
Message msg = new Message();
msg.what = 0;
msg.obj=params[0];
handler.sendMessage(msg);
return mListItems;
}

@Override
protected void onPostExecute(LinkedList<Comment> result) {
mAdapter.notifyDataSetChanged();
super.onPostExecute(result);
}
}

// 加载，从网络端获取数据
public LinkedList<Comment> fetchData(final int Action) {
if(!NetworkUtils.isNetworkAvailable(MainActivity3.this)){
mListView.setVisibility(View.GONE);
textview.setVisibility(View.VISIBLE);
return null;
}
// setState(LOADING);
Log.e("blueberry", "fetchData begin page=" + page);
BmobQuery<Comment> query = new BmobQuery<Comment>();
// 根据createdAt字段降序显示数据
query.order("-createdAt");
// 限制最多10条显示一页
query.setLimit(10);
// 用于控制查询显示次数，去除会刷新重复显示个数。
query.setSkip(10 * (page++));
query.findObjects(MainActivity3.this, new FindListener<Comment>() {

@Override
public void onSuccess(List<Comment> list) {
Log.i("blueberry", "查询成功 success.list个数=" + list.size());
if (list.size() != 0 && list.get(list.size() - 1) != null) {
if (Action == REFRESH_GET_DATE) {
Log.i("blueberry",
"上刷新ListItems个数=" + mListItems.size());
mListItems.clear();
Log.i("blueberry",
"上刷新清除后mListItems个数=" + mListItems.size());
}
// 将网络段获取的数据list集合，加入创建的list对象中
Log.i("blueberry", "添加listview个数前=" + mListItems.size());
mListItems.addAll(list);
Log.i("blueberry", "添加listview个数后=" + mListItems.size());
// setState(LOADING_COMPLETED);
mAdapter.notifyDataSetChanged();
} else {
Log.i("blueberry", "当前查询list数目为0   page=" + page);
page--;
// setState(LOADING_FAILED);
}
}

@Override
public void onError(int arg0, String arg1) {
page--;
// setState(LOADING_FAILED);
}
});
return mListItems;
}

// 设置获取直当前状态
public void setState(int state) {
switch (state) {
case LOADING:
if (mListItems.size() == 0) {
mListView.setVisibility(View.GONE);
}
break;
case LOADING_COMPLETED:
mPullRefreshListView.setVisibility(View.VISIBLE);
break;
case LOADING_FAILED:
if (mListItems.size() == 0) {
mPullRefreshListView.setVisibility(View.VISIBLE);
}
break;
case NORMAL:
break;
default:
break;
}
}

class AIContentAdapter extends BaseAdapter {
public static final String TAG = "AIContentAdapter";
private LinkedList<Comment> dataList;

public AIContentAdapter(Context context, LinkedList<Comment> list) {
super();
Log.i("blueberry", "AIContentAdapter 加载");
dataList = list;
}

@Override
public int getCount() {
return dataList.size();
}

@Override
public Object getItem(int arg0) {
return arg0;
}

@Override
public long getItemId(int arg1) {
return arg1;
}

@Override
public View getView(int position, View convertView, ViewGroup parent) {
final ViewHolder viewHolder;
if (convertView == null) {
viewHolder = new ViewHolder();
convertView = LayoutInflater.from(MainActivity3.this).inflate(
R.layout.yilin_list_item, null);
viewHolder.item_title = (TextView) convertView
.findViewById(R.id.tv_article_title);
convertView.setTag(viewHolder);
} else {
viewHolder = (ViewHolder) convertView.getTag();
}
System.out.println("blueberry_datalist.size=" + dataList.size());
final Comment entity = dataList.get(position);
// 显示单个title
viewHolder.item_title.setText((position + 1) + "  "
+ entity.getCommentContent());
return convertView;
}
}

public class ViewHolder {
public TextView item_title;
}

@Override
public void onRefresh() {
new GetDataTask().execute(REFRESH_GET_DATE);
}

@Override
public void onLoadMore() {
new GetDataTask().execute(LOADMORE_GET_DATE);
}

@SuppressLint("SimpleDateFormat")
private void onLoad() {
mListView.stopRefresh();
mListView.stopLoadMore();
SimpleDateFormat formatter = new SimpleDateFormat(
"yyyy年MM月dd日   HH:mm:ss");
Date curDate = new Date(System.currentTimeMillis());// 获取当前时间
String str = formatter.format(curDate);
mListView.setRefreshTime(str);
}

private void geneItems(final int ACTION) {
if (ACTION == FRIST_GET_DATE) {// 第一次加载
fetchData(ACTION);
mListView.setAdapter(mAdapter);
} else if (ACTION == REFRESH_GET_DATE) {// 刷新数据
page = 0;
mListItems = fetchData(ACTION);
mAdapter.notifyDataSetChanged();
onLoad();
} else if (ACTION == LOADMORE_GET_DATE) {// 加载更多
mListItems = fetchData(ACTION);
mAdapter.notifyDataSetChanged();
onLoad();
}
}

@Override
protected void onDestroy() {
super.onDestroy();
}
}