HttpUrlConnection + AsyncTask请求xml格式，HttpClient + Thread + Handler请求json

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布局activity_main.xml

<ListView       android:id="@+id/lv"      android:layout_width="fill_parent"      android:layout_height="wrap_content"      ></ListView>

MainActivity

package com.example.lainxidemo;import java.io.IOException;import java.io.InputStream;import java.net.HttpURLConnection;import java.net.URL;import java.util.ArrayList;import java.util.List;import org.xmlpull.v1.XmlPullParser;import org.xmlpull.v1.XmlPullParserException;import android.app.Activity;import android.app.ProgressDialog;import android.content.Intent;import android.os.AsyncTask;import android.os.Bundle;import android.util.Log;import android.util.Xml;import android.view.View;import android.widget.AdapterView;import android.widget.AdapterView.OnItemClickListener;import android.widget.ListView;import com.example.adapter.Myadapter;import com.example.bean.Book;public class MainActivity extends Activity {    private ProgressDialog dialog;    private String url;    private String json;    private HttpURLConnection connection;    private InputStream in;    private List<Book> list;    private String pname;    private Book b;    private ListView lv;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        lv = (ListView) findViewById(R.id.lv);        MyAsyntask task=new MyAsyntask();        task.execute(url);        lv.setOnItemClickListener(new OnItemClickListener() {            @Override            public void onItemClick(AdapterView<?> parent, View view,                    int position, long id) {                Intent intent =new Intent(MainActivity.this,TwoActivity.class);                intent.putExtra("id", list.get(position).getId());                startActivity(intent);            }        });    }     class MyAsyntask extends AsyncTask<String, Void, List<Book>>{        @Override        protected List<Book> doInBackground(String... params) {            url = "http://apis.juhe.cn/goodbook/catalog?key=eb487dc80b175790e914b7f62e94c478&dtype=xml";            list = pulldemo();            return list;        }        @Override        protected void onPreExecute() {            super.onPreExecute();             dialog=new ProgressDialog(MainActivity.this);             dialog.setTitle("提示信息");             dialog.setMessage("正在加载......");             dialog.show();        }        @Override        protected void onPostExecute(List<Book> result) {            // TODO Auto-generated method stub            super.onPostExecute(result);            dialog.cancel();            Myadapter adapter=new Myadapter(MainActivity.this,list);            Log.i("list", list.toString());            lv.setAdapter(adapter);        }     }       private List<Book> pulldemo() {            boolean flag = true;            try {               // url = "http://apis.juhe.cn/goodbook/query?key=9d6ef8c31647a206e05fcaff70527182&catalog_id=244&pn=2&rn="+rn+"&dtype=xml";                // StringBufferInputStream in=new StringBufferInputStream(url);                URL u = new URL(url);                HttpURLConnection conn = (HttpURLConnection) u.openConnection();                conn.setReadTimeout(5000);                conn.setRequestMethod("GET");                conn.setRequestProperty("encoding", "utf-8");                conn.connect();                if (conn.getResponseCode() == 200) {                    in = conn.getInputStream();                }                XmlPullParser parser = Xml.newPullParser();                parser.setInput(in, "UTF_8");                int event = parser.getEventType();                while (flag) {                    switch (event) {                    case XmlPullParser.START_DOCUMENT:                        list = new ArrayList<>();                        break;                    case XmlPullParser.START_TAG:                        pname = parser.getName();                        if (pname.equals("item")) {                          b = new Book();                        }                        break;                    case XmlPullParser.TEXT:                        if (pname.equals("id")) {                          b.setId(parser.getText());                        } else if (pname.equals("catalog")) {                            b.setCatalog(parser.getText());                        }                        break;                    case XmlPullParser.END_TAG:                        pname = parser.getName();                        if (pname.equals("item")) {                            list.add(b);                        }                        pname = "";                        break;                    case XmlPullParser.END_DOCUMENT:                        flag = false;                        break;                    }                    event = parser.next();                }                Log.i("listddd", list.toString());            } catch (XmlPullParserException e) {                // TODO Auto-generated catch block                e.printStackTrace();            } catch (IOException e) {                // TODO Auto-generated catch block                e.printStackTrace();            }            return list;        }}

PullToRefreshGridView布局

 <com.handmark.pulltorefresh.library.PullToRefreshGridView       android:id="@+id/gi"      android:layout_width="fill_parent"      android:layout_height="fill_parent"      android:numColumns="3"      ></com.handmark.pulltorefresh.library.PullToRefreshGridView>

TwoActivity

package com.example.lainxidemo;import java.io.IOException;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.Bundle;import android.os.Handler;import android.os.Message;import android.util.Log;import android.widget.GridView;import com.example.adapter.Sadapter;import com.example.bean.Data;import com.example.bean.Example;import com.example.bean.Res;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 TwoActivity extends Activity {    private String id;    private String json;    private List<Data> dlist;    private int pn=0;    private Sadapter adapter;    private Handler handler=new Handler(){        public void handleMessage(Message msg) {            Gson g=new Gson();            Example fromJson = g.fromJson(json, Example.class);            Res result = fromJson.getResult();            dlist = result.getData();            Log.i("dlsit", dlist.toString());            adapter = new Sadapter(TwoActivity.this,dlist);            gi.setAdapter(adapter);            if(msg.what==0){                adapter.notifyDataSetChanged();                gi.onRefreshComplete();            }        };    };    private PullToRefreshGridView gi;    @Override    protected void onCreate(Bundle savedInstanceState) {        // TODO Auto-generated method stub        super.onCreate(savedInstanceState);        setContentView(R.layout.view);        Intent intent = getIntent();        id = intent.getStringExtra("id");        jiexi(pn);        gi = (PullToRefreshGridView) findViewById(R.id.gi);        gi.setMode(Mode.BOTH);        gi.setOnRefreshListener(new OnRefreshListener2<GridView>() {            @Override            public void onPullDownToRefresh(                    PullToRefreshBase<GridView> refreshView) {                pn=40;                jiexi(pn);                handler.sendEmptyMessageDelayed(0, 2000);            }            @Override            public void onPullUpToRefresh(                    PullToRefreshBase<GridView> refreshView) {                pn=20;                jiexi(pn);                handler.sendEmptyMessageDelayed(0, 2000);            }        });    }    private void jiexi(final int pn) {        new Thread(){            public void run() {                String urls="http://apis.juhe.cn/goodbook/query?key=eb487dc80b175790e914b7f62e94c478&catalog_id="+id+"&pn="+pn+"&rn=20";                json = getjson(urls);                Message msg=new Message();                msg.what=1;                handler.sendMessage(msg);            };        }.start();    }    protected String getjson(String urls) {        String js=null;        try {            HttpClient client=new DefaultHttpClient();            HttpGet get=new HttpGet(urls);            HttpResponse  response=client.execute(get);            int statusCode = response.getStatusLine().getStatusCode();            if(statusCode==200){                HttpEntity entity = response.getEntity();                 js = EntityUtils.toString(entity, "UTF_8");                 Log.i(js, js);            }        } catch (ClientProtocolException e) {            // TODO Auto-generated catch block            e.printStackTrace();        } catch (IOException e) {            // TODO Auto-generated catch block            e.printStackTrace();        }        return js;    }}

Myadapter

package com.example.adapter;import java.util.List;import android.content.Context;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.TextView;import com.example.bean.Book;import com.example.lainxidemo.R;public class Myadapter extends BaseAdapter {    private Context context;    private List<Book> list;    public Myadapter(Context context,List<Book> list){        this.context=context;        this.list=list;    }    @Override    public int getCount() {        // TODO Auto-generated method stub        return list.size();    }    @Override    public Object getItem(int position) {        // TODO Auto-generated method stub        return null;    }    @Override    public long getItemId(int position) {        // TODO Auto-generated method stub        return 0;    }    @Override    public View getView(int position, View convertView, ViewGroup parent) {        if(convertView==null){            convertView=View.inflate(context, R.layout.listview_item, null);        }        TextView tx=(TextView) convertView.findViewById(R.id.tx);        tx.setText(list.get(position).getCatalog());        return convertView;    }}

Sadapter

package com.example.adapter;import java.util.List;import android.content.Context;import android.view.View;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.ImageView;import android.widget.TextView;import com.example.bean.Data;import com.example.lainxidemo.R;import com.lidroid.xutils.BitmapUtils;public class Sadapter extends BaseAdapter {    private Context context;    private  List<Data> dlist;    public Sadapter (Context context, List<Data> dlist){        this.context=context;        this.dlist=dlist;    }    @Override    public int getCount() {        // TODO Auto-generated method stub        return dlist.size();    }    @Override    public Object getItem(int position) {        // TODO Auto-generated method stub        return null;    }    @Override    public long getItemId(int position) {        // TODO Auto-generated method stub        return 0;    }    @Override    public View getView(int position, View convertView, ViewGroup parent) {        if(convertView==null){            convertView=View.inflate(context, R.layout.g_item, null);        }        ImageView im=(ImageView) convertView.findViewById(R.id.im);        TextView tname=(TextView) convertView.findViewById(R.id.tname);        TextView t1=(TextView) convertView.findViewById(R.id.t1);        TextView t2=(TextView)         convertView.findViewById(R.id.t2);        BitmapUtils utils=new BitmapUtils(context);        utils.display(im, dlist.get(position).getImg());        tname.setText(dlist.get(position).getTitle());        t1.setText(dlist.get(position).getReading());        t2.setText(dlist.get(position).getBytime());        return convertView;    }}

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