PullToRefreshGridView

来源：互联网发布：淘宝店铺话费充值软件编辑：程序博客网时间：2024/05/23 22:17

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import org.apache.http.HttpEntity;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.HttpClient;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;

import android.app.Activity;
import android.content.Intent;
import android.os.AsyncTask;
import android.os.Bundle;
import android.os.Handler;
import android.os.Message;
import android.util.Log;
import android.widget.GridView;

import com.example.bean.Myinfo;
import com.example.bean.Myinfo.MyData;
import com.google.gson.Gson;
import com.handmark.pulltorefresh.library.PullToRefreshBase;
import com.handmark.pulltorefresh.library.PullToRefreshBase.Mode;
import com.handmark.pulltorefresh.library.PullToRefreshBase.OnRefreshListener2;
import com.handmark.pulltorefresh.library.PullToRefreshGridView;

public class SendActivity extends Activity {

   private PullToRefreshGridView gv_2;
   private String url;
   private int index = 10;
   private Adapter adapter;
   private List<MyData> data = new ArrayList<Myinfo.MyData>();
   private List<MyData> list=new ArrayList<Myinfo.MyData>();
   String id;
   private int port=1;

   Handler handler=new Handler(){
        public void handleMessage(Message msg) {
           data=(List<MyData>) msg.obj;
            if (port==1) {//也就是说第一次联网请求数据
                list.clear();//清空集合中的数据
            }
            list.addAll(data);//将这个数据添加到适配器器上面展示一下
            if (adapter==null) {
               adapter=new Adapter(list, SendActivity.this);
               gv_2.setAdapter(adapter);
               gv_2.onRefreshComplete();
            }else {
                //适配器通知数据发生改变
                adapter.notifyDataSetChanged();
                gv_2.onRefreshComplete();
            }

        };
    };
   @Override
   protected void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       setContentView(R.layout.activity_send);
       gv_2 = (PullToRefreshGridView) findViewById(R.id.gv_2);
       Intent intent = getIntent();
       id = intent.getStringExtra("id");
       gv_2.setMode(Mode.BOTH);
       gv_2.setOnRefreshListener(new OnRefreshListener2<GridView>() {

           @Override
           public void onPullDownToRefresh(
                   PullToRefreshBase<GridView> refreshView) {
               MyAsyncTask asyncTask = new MyAsyncTask();
               index = index + 10;
               asyncTask.execute();

           }

           @Override
           public void onPullUpToRefresh(
                   PullToRefreshBase<GridView> refreshView) {
               MyAsyncTask asyncTask = new MyAsyncTask();
               index = index + 10;
               asyncTask.execute();
           }

       });
   }

   class MyAsyncTask extends AsyncTask<Void, Void, List<MyData>> {

       @Override
       protected List<MyData> doInBackground(Void... params) {
           List<MyData> list = null;
           url = "http://apis.juhe.cn/goodbook/query?key=9d6ef8c31647a206e05fcaff70527182&catalog_id="
                   + id + "&rn=10&pn=20";
           port++;
           try {
               HttpClient httpClient = new DefaultHttpClient();
               HttpGet httpGet = new HttpGet(url);
               HttpResponse httpResponse = httpClient.execute(httpGet);
               int statusCode = httpResponse.getStatusLine().getStatusCode();
               if (statusCode == 200) {
                   HttpEntity entity = httpResponse.getEntity();
                   String string = EntityUtils.toString(entity, "UTF-8");
                   Gson gson = new Gson();
                   Myinfo json = gson.fromJson(string, Myinfo.class);
                   list=json.getResult().getData();
                   Log.i("TAG", list.size()+"");
               }
           } catch (ClientProtocolException e) {
               e.printStackTrace();
           } catch (IOException e) {
               e.printStackTrace();
           }
           return list;
       }

       @Override
       protected void onPostExecute(List<MyData> result) {
           Message message=Message.obtain();
           message.obj=result;
            handler.sendMessage(message);

           super.onPostExecute(result);
       }
   }
}

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