volley中网络请求

首先使用Volley类创建 RequestQueue queue = Volley.newRequestQueue(this); 

Making GET Requests

 1 final String url = "http://httpbin.org/get?param1=hello";
 2  
 3 // prepare the Request
 4 JsonObjectRequest getRequest = new JsonObjectRequest(Request.Method.GET, url, null,
 5     new Response.Listener<JSONObject>() 
 6     {
 7         @Override
 8         public void onResponse(JSONObject response) {   
 9                         // display response     
10             Log.d("Response", response.toString());
11         }
12     }, 
13     new Response.ErrorListener() 
14     {
15          @Override
16          public void onErrorResponse(VolleyError error) {            
17             Log.d("Error.Response", response);
18        }
19     }
20 );
21  
22 // add it to the RequestQueue   
23 queue.add(getRequest);

Making POST Requests

 1 url = "http://httpbin.org/post";
 2 StringRequest postRequest = new StringRequest(Request.Method.POST, url, 
 3     new Response.Listener<String>() 
 4     {
 5         @Override
 6         public void onResponse(String response) {
 7             // response
 8             Log.d("Response", response);
 9         }
10     }, 
11     new Response.ErrorListener() 
12     {
13          @Override
14          public void onErrorResponse(VolleyError error) {
15              // error
16              Log.d("Error.Response", response);
17        }
18     }
19 ) {     
20     @Override
21     protected Map<String, String> getParams() 
22     {  
23             Map<String, String>  params = new HashMap<String, String>();  
24             params.put("name", "Alif");  
25             params.put("domain", "http://itsalif.info");
26              
27             return params;  
28     }
29 };
30 queue.add(postRequest);

Making PUT Requests

 1 url = "http://httpbin.org/put";
 2 StringRequest putRequest = new StringRequest(Request.Method.PUT, url, 
 3     new Response.Listener<String>() 
 4     {
 5         @Override
 6         public void onResponse(String response) {
 7             // response
 8             Log.d("Response", response);
 9         }
10     }, 
11     new Response.ErrorListener() 
12     {
13          @Override
14          public void onErrorResponse(VolleyError error) {
15                          // error
16              Log.d("Error.Response", response);
17        }
18     }
19 ) {
20  
21     @Override
22     protected Map<String, String> getParams() 
23     {  
24             Map<String, String>  params = new HashMap<String, String> ();  
25             params.put("name", "Alif");  
26             params.put("domain", "http://itsalif.info");
27              
28             return params;  
29     }
30  
31 };
32  
33 queue.add(putRequest);

Making DELETE Requests

 1 url = "http://httpbin.org/delete";
 2 StringRequest dr = new StringRequest(Request.Method.DELETE, url, 
 3     new Response.Listener<String>() 
 4     {
 5         @Override
 6         public void onResponse(String response) {
 7             // response
 8             Toast.makeText($this, response, Toast.LENGTH_LONG).show();
 9         }
10     }, 
11     new Response.ErrorListener() 
12     {
13          @Override
14          public void onErrorResponse(VolleyError error) {
15              // error.
16               
17        }
18     }
19 );
20 queue.add(dr);

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