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);

下一篇继续介绍Volley图片加载............