首先导入类库，添加到所需的项目中
这是布局文件
<com.handmark.pulltorefresh.library.PullToRefreshListView
xmlns:ptr="http://schemas.android.com/apk/res-auto"
android:id="@+id/lv"
android:layout_width="wrap_content"
android:layout_height="match_parent"
android:layout_weight="1"
ptr:ptrMode="both" >
</com.handmark.pulltorefresh.library.PullToRefreshListView>
接下来写下拉刷新，上拉加载的逻辑判断
private ArrayList<Detail> list=new ArrayList<Detail>();
private PullToRefreshListView lv;
private MyListAdapter adapter;
private int p=10;
private Handler handler = new Handler() {
public void handleMessage(android.os.Message msg) {
if (msg.what == 0) {
String data = (String) msg.obj;
// 解析Json数据
Gson gson = new Gson();
AllData ad = gson.fromJson(data, AllData.class);
list=ad.getData();
adapter = new MyListAdapter(MainActivity.this, list);
lv.setAdapter((ListAdapter) adapter);
adapter.notifyDataSetChanged();
lv.onRefreshComplete();
}if(msg.what==1){
String data = (String) msg.obj;
// 解析Json数据
Gson gson = new Gson();
AllData ad = gson.fromJson(data, AllData.class);
list.addAll(ad.getData());
adapter.notifyDataSetChanged();
lv.onRefreshComplete();
}
};
};
// 找到需要显示新闻的listview
lv = (PullToRefreshListView) findViewById(R.id.lv);
new Thread() {
public void run() {
readData();
}
}.start();
//给listview设置下拉刷新和上拉加载的刷新监听事件
lv.setOnRefreshListener(new OnRefreshListener2<ListView>() {
@Override
public void onPullDownToRefresh(
PullToRefreshBase<ListView> refreshView) {
// 刷新时间
String label = DateUtils.formatDateTime(
getApplicationContext(), System.currentTimeMillis(),
DateUtils.FORMAT_SHOW_TIME | DateUtils.FORMAT_SHOW_DATE
| DateUtils.FORMAT_ABBREV_ALL);
// Update the LastUpdatedLabel
refreshView.getLoadingLayoutProxy().setLastUpdatedLabel(label);
new Thread() {
public void run() {
try {
Thread.sleep(2000);
z=z-1;
} catch (InterruptedException e) {
e.printStackTrace();
}
readData();//下拉和初始化数据可以使用同一个方法
}
}.start();
}
@Override
public void onPullUpToRefresh(
PullToRefreshBase<ListView> refreshView) {
new Thread() {
public void run() {
try {
Thread.sleep(2000);
p=p+1;
} catch (InterruptedException e) {
e.printStackTrace();
}
readData1();
}
}.start();
}
});
//以下是下拉刷新和初始化数据的方法
protected void readData() {
try {
URL url = new URL(
"http://api.expoon.com/AppNews/getNewsList/type/1/p/"+z);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setRequestMethod("GET");
conn.setReadTimeout(8000);
conn.setConnectTimeout(5000);
InputStream is = conn.getInputStream();
BufferedReader br = new BufferedReader(new InputStreamReader(is));
StringBuilder str = new StringBuilder();
String line;
while ((line = br.readLine()) != null) {
str.append(line);
}
Message msg = new Message();
msg.what = 0;
msg.obj = str.toString();
handler.sendMessage(msg);
Log.i("line", str.toString());
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
//这是上拉加载的方法
private void readData1() {
try {
URL url = new URL(
"http://api.expoon.com/AppNews/getNewsList/type/1/p/"+p);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setRequestMethod("GET");
conn.setReadTimeout(8000);
conn.setConnectTimeout(5000);
InputStream is = conn.getInputStream();
BufferedReader br = new BufferedReader(new InputStreamReader(is));
StringBuilder str = new StringBuilder();
String line;
while ((line = br.readLine()) != null) {
str.append(line);
}
Message msg = new Message();
msg.what = 1;
msg.obj = str.toString();
handler.sendMessage(msg);
Log.i("line", str.toString());
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}