簡單迅捷的Android網絡模塊范例：Volley

import android.app.ProgressDialog; import android.os.Bundle; import android.app.Activity; import android.util.Log; import android.view.LayoutInflater; import android.view.Menu; import android.view.View; import android.view.ViewGroup; import android.widget.BaseAdapter; import android.widget.ListView; import android.widget.TextView; import com.android.volley.Request; import com.android.volley.RequestQueue; import com.android.volley.Response; import com.android.volley.VolleyError; import com.android.volley.toolbox.JsonObjectRequest; import com.android.volley.toolbox.Volley; import org.json.JSONArray; import org.json.JSONObject;

import java.util.ArrayList;

public class MainActivity extends Activity {

private String TAG = this.getClass().getSimpleName();
private ListView lstView;
private RequestQueue mRequestQueue;
private ArrayList<NewsModel> arrNews ;
private LayoutInflater lf;
private VolleyAdapter va;
private ProgressDialog pd;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    lf = LayoutInflater.from(this);


    arrNews = new ArrayList<NewsModel>();
    va = new VolleyAdapter();

    lstView = (ListView) findViewById(R.id.listView);
    lstView.setAdapter(va);
    mRequestQueue =  Volley.newRequestQueue(this);
    String url = "http://pipes.yahooapis.com/pipes/pipe.run?_id=giWz8Vc33BG6rQEQo_NLYQ&_render=json";
    pd = ProgressDialog.show(this,"Please Wait...","Please Wait...");
    try{
        Thread.sleep(2000);
    }catch(Exception e){

        }
    JsonObjectRequest jr = new JsonObjectRequest(Request.Method.GET,url,null,new Response.Listener<JSONObject>() {
        @Override
        public void onResponse(JSONObject response) {
            Log.i(TAG,response.toString());
            parseJSON(response);
            va.notifyDataSetChanged();
            pd.dismiss();

; } },new Response.ErrorListener() { @Override public void onErrorResponse(VolleyError error) { Log.i(TAG,error.getMessage()); } }); mRequestQueue.add(jr);

}

private void parseJSON(JSONObject json){
    try{
        JSONObject value = json.getJSONObject("value");
        JSONArray items = value.getJSONArray("items");
        for(int i=0;i<items.length();i++){

                JSONObject item = items.getJSONObject(i);
                NewsModel nm = new NewsModel();
                nm.setTitle(item.optString("title"));
                nm.setDescription(item.optString("description"));
                nm.setLink(item.optString("link"));
                nm.setPubDate(item.optString("pubDate"));
                arrNews.add(nm);
        }
    }
    catch(Exception e){
        e.printStackTrace();
    }


}


class NewsModel{
    private String title;
    private String link;
    private String description;
    private String pubDate;

    void setTitle(String title) {
        this.title = title;
    }

    void setLink(String link) {
        this.link = link;
    }

    void setDescription(String description) {
        this.description = description;
    }

    void setPubDate(String pubDate) {
        this.pubDate = pubDate;
    }

    String getLink() {
        return link;
    }

    String getDescription() {
        return description;
    }

    String getPubDate() {
        return pubDate;
    }

    String getTitle() {

        return title;
    }
}


class VolleyAdapter extends BaseAdapter{

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

    @Override
    public Object getItem(int i) {
        return arrNews.get(i);
    }

    @Override
    public long getItemId(int i) {
        return 0;
    }

    @Override
    public View getView(int i, View view, ViewGroup viewGroup) {
        ViewHolder vh ;
       if(view == null){
           vh = new ViewHolder();
           view = lf.inflate(R.layout.row_listview,null);
           vh.tvTitle = (TextView) view.findViewById(R.id.txtTitle);
           vh.tvDesc = (TextView) view.findViewById(R.id.txtDesc);
           vh.tvDate = (TextView) view.findViewById(R.id.txtDate);
           view.setTag(vh);
      }
        else{
           vh = (ViewHolder) view.getTag();
       }

        NewsModel nm = arrNews.get(i);
        vh.tvTitle.setText(nm.getTitle());
        vh.tvDesc.setText(nm.getDescription());
        vh.tvDate.setText(nm.getPubDate());
        return view;
    }

     class  ViewHolder{
        TextView tvTitle;
         TextView tvDesc;
         TextView tvDate;

    }

}

}</pre>