volley中网络请求

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

Making GET Requests

 final String url = "http://httpbin.org/get?param1=hello";

 // prepare the Request
 JsonObjectRequest getRequest = new JsonObjectRequest(Request.Method.GET, url, null,
     new Response.Listener<JSONObject>()
     {
         @Override
         public void onResponse(JSONObject response) {
                         // display response
             Log.d("Response", response.toString());
         }
     },
     new Response.ErrorListener()
     {
          @Override
          public void onErrorResponse(VolleyError error) {
             Log.d("Error.Response", response);
        }
     }
 );

 // add it to the RequestQueue
 queue.add(getRequest);

Making POST Requests

 url = "http://httpbin.org/post";
 StringRequest postRequest = new StringRequest(Request.Method.POST, url,
     new Response.Listener<String>()
     {
         @Override
         public void onResponse(String response) {
             // response
             Log.d("Response", response);
         }
     },
     new Response.ErrorListener()
     {
          @Override
          public void onErrorResponse(VolleyError error) {
              // error
              Log.d("Error.Response", response);
        }
     }
 ) {
     @Override
     protected Map<String, String> getParams()
     {
             Map<String, String>  params = new HashMap<String, String>();
             params.put("name", "Alif");
             params.put("domain", "http://itsalif.info");

             return params;
     }
 };
 queue.add(postRequest);

Making PUT Requests

 url = "http://httpbin.org/put";
 StringRequest putRequest = new StringRequest(Request.Method.PUT, url,
     new Response.Listener<String>()
     {
         @Override
         public void onResponse(String response) {
             // response
             Log.d("Response", response);
         }
     },
     new Response.ErrorListener()
     {
          @Override
          public void onErrorResponse(VolleyError error) {
                          // error
              Log.d("Error.Response", response);
        }
     }
 ) {

     @Override
     protected Map<String, String> getParams()
     {
             Map<String, String>  params = new HashMap<String, String> ();
             params.put("name", "Alif");
             params.put("domain", "http://itsalif.info");

             return params;
     }

 };

 queue.add(putRequest);

Making DELETE Requests

 url = "http://httpbin.org/delete";
 StringRequest dr = new StringRequest(Request.Method.DELETE, url,
     new Response.Listener<String>()
     {
         @Override
         public void onResponse(String response) {
             // response
             Toast.makeText($this, response, Toast.LENGTH_LONG).show();
         }
     },
     new Response.ErrorListener()
     {
          @Override
          public void onErrorResponse(VolleyError error) {
              // error.

        }
     }
 );
 queue.add(dr);

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