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package cc.cn;import java.util.HashMap;import org.json.JSONObject;import android.app.Activity;import android.content.Context;import android.os.Bundle;import com.android.volley.AuthFailureError;import com.android.volley.RequestQueue;import com.android.volley.Response;import com.android.volley.VolleyError;import com.android.volley.Request.Method;import com.android.volley.toolbox.JsonObjectRequest;import com.android.volley.toolbox.StringRequest;import com.android.volley.toolbox.Volley;/** * Demo描述: * 去年一个项目中简单的使用了Volley,参见: * http://blog.csdn.net/lfdfhl/article/details/12223345 * 最近guolin写了几篇文章详细介绍Volley,所以在此比较系统地学习一下. * 在本示例中,主要包括: * 1 利用Volley实现Get请求 * 2 利用Volley实现Post请求 * 3 利用Volley实现Json数据请求 *  * 注意事项: * 1 引入jar包volley.jar * 2 网络权限
    *  * 学习资料: * http://blog.csdn.net/guolin_blog/article/details/17482095 * Thank you very much * */public class MainActivity extends Activity {	private RequestQueue mRequestQueue;	private StringRequest mStringRequest;	private Context mContext;	private JsonObjectRequest mJsonObjectRequest;    @Override    public void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.main);        volley_get();        //volley_post();        //volley_json();    }            //利用Volley实现Get请求    private void volley_get(){    	mContext=this;    	String url="http://www.baidu.com/";    	//1 创建RequestQueue对象    	mRequestQueue=Volley.newRequestQueue(mContext);    	//2 创建StringRequest对象		mStringRequest = new StringRequest(				url,				new Response.Listener
   
    () {					@Override					public void onResponse(String response) {                        System.out.println("请求结果:"+response);					}				}, 				new Response.ErrorListener() {					@Override					public void onErrorResponse(VolleyError error) {                        System.out.println("请求错误:"+error.toString());					}				});		//3 将StringRequest添加到RequestQueue		mRequestQueue.add(mStringRequest);    }        //利用Volley实现Post请求	private void volley_post() {		String url = "http://hxyj.cwwic.cn/wap/api_cs/user.php?action=login";		mContext = this;		mRequestQueue = Volley.newRequestQueue(mContext);		mStringRequest = new StringRequest(				Method.POST, 				url,				new Response.Listener
    
     () {					@Override					public void onResponse(String response) {						System.out.println("请求结果:" + response);					}				}, 				new Response.ErrorListener() {					@Override					public void onErrorResponse(VolleyError error) {						System.out.println("请求错误:" + error.toString());					}				}) {			//携带参数			@Override			protected HashMap
     
       getParams()throws AuthFailureError {				HashMap
      
        hashMap = new HashMap
       
        ();				hashMap.put("un", "411111222");				hashMap.put("pw", "180034111");				return hashMap;			}		};		mRequestQueue.add(mStringRequest);	}		 //利用Volley实现Json数据请求	private void volley_json() {		mContext = this;		String url = "http://m.weather.com.cn/data/101010100.html";		// 1 创建RequestQueue对象		mRequestQueue = Volley.newRequestQueue(mContext);		// 2 创建JsonObjectRequest对象		mJsonObjectRequest = new JsonObjectRequest(				url, 				null,				new Response.Listener
        
         () { @Override public void onResponse(JSONObject response) { System.out.println("请求结果:" + response.toString()); } }, new Response.ErrorListener() { @Override public void onErrorResponse(VolleyError error) { System.out.println("请求错误:" + error.toString()); } }); // 3 将JsonObjectRequest添加到RequestQueue mRequestQueue.add(mJsonObjectRequest); } }
        
       
      
     
    
   

main.xml如下:

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