如何在Volley Request中设置自定义标题

时间：2013-06-11 16:45:15

标签： android android-volley

如何为排球请求设置自定义标题？目前，有一种方法可以为POST请求设置正文内容。我有一个简单的GET请求，但我需要传递自定义标头。我没有看到JsonRequest类如何支持它。它有可能吗？

13 个答案:

答案 0 :(得分：133)

getParams（）接受的答案是设置POST正文数据，但标题中的问题询问如何设置HTTP头像User-Agent。正如CommonsWare所说，你覆盖了getHeaders（）。下面是一些示例代码，它将User-Agent设置为'Nintendo Gameboy'，将Accept-Language设置为'fr'：

public void requestWithSomeHttpHeaders() {
    RequestQueue queue = Volley.newRequestQueue(this);
    String url = "http://www.somewebsite.com";
    StringRequest getRequest = new StringRequest(Request.Method.GET, 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) {
                // TODO Auto-generated method stub
                Log.d("ERROR","error => "+error.toString());
            }
        }
    ) {     
        @Override
        public Map<String, String> getHeaders() throws AuthFailureError { 
                Map<String, String>  params = new HashMap<String, String>();  
                params.put("User-Agent", "Nintendo Gameboy");  
                params.put("Accept-Language", "fr");

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

}

答案 1 :(得分：114)

您似乎覆盖public Map<String, String> getHeaders()，defined in Request，以返回所需的HTTP标头。

答案 2 :(得分：28)

如果你需要的是发布数据而不是在网址中添加信息。

public Request post(String url, String username, String password, 
      Listener listener, ErrorListener errorListener) {
  JSONObject params = new JSONObject();
  params.put("user", username);
  params.put("pass", password);
  Request req = new Request(
     Method.POST,
     url,
     params.toString(),
     listener,
     errorListener
  );

  return req;
}

如果你想要做的是编辑请求中的标题，这就是你想要做的：

// could be any class that implements Map
Map<String, String> mHeaders = new ArrayMap<String, String>();
mHeaders.put("user", USER);
mHeaders.put("pass", PASSWORD);
Request req = new Request(url, postBody, listener, errorListener) {
  public Map<String, String> getHeaders() {
    return mHeaders;
  }
}

答案 3 :(得分：17)

您可以看到this解决方案。它显示了如何获取/设置cookie，但cookie只是请求/响应中的一个标头。您必须覆盖其中一个Volley的* Request类，并在getHeaders()

中设置所需的标题

以下是链接来源：

public class StringRequest extends com.android.volley.toolbox.StringRequest {

private final Map<String, String> _params;

/**
 * @param method
 * @param url
 * @param params
 *            A {@link HashMap} to post with the request. Null is allowed
 *            and indicates no parameters will be posted along with request.
 * @param listener
 * @param errorListener
 */
public StringRequest(int method, String url, Map<String, String> params, Listener<String> listener,
        ErrorListener errorListener) {
    super(method, url, listener, errorListener);

    _params = params;
}

@Override
protected Map<String, String> getParams() {
    return _params;
}

/* (non-Javadoc)
 * @see com.android.volley.toolbox.StringRequest#parseNetworkResponse(com.android.volley.NetworkResponse)
 */
@Override
protected Response<String> parseNetworkResponse(NetworkResponse response) {
    // since we don't know which of the two underlying network vehicles
    // will Volley use, we have to handle and store session cookies manually
    MyApp.get().checkSessionCookie(response.headers);

    return super.parseNetworkResponse(response);
}

/* (non-Javadoc)
 * @see com.android.volley.Request#getHeaders()
 */
@Override
public Map<String, String> getHeaders() throws AuthFailureError {
    Map<String, String> headers = super.getHeaders();

    if (headers == null
            || headers.equals(Collections.emptyMap())) {
        headers = new HashMap<String, String>();
    }

    MyApp.get().addSessionCookie(headers);

    return headers;
}

}

和MyApp课程：

public class MyApp extends Application {
    private static final String SET_COOKIE_KEY = "Set-Cookie";
    private static final String COOKIE_KEY = "Cookie";
    private static final String SESSION_COOKIE = "sessionid";

    private static MyApp _instance;
    private RequestQueue _requestQueue;
    private SharedPreferences _preferences;

    public static MyApp get() {
        return _instance;
    }

    @Override
    public void onCreate() {
        super.onCreate();
        _instance = this;
            _preferences = PreferenceManager.getDefaultSharedPreferences(this);
        _requestQueue = Volley.newRequestQueue(this);
    }

    public RequestQueue getRequestQueue() {
        return _requestQueue;
    }


    /**
     * Checks the response headers for session cookie and saves it
     * if it finds it.
     * @param headers Response Headers.
     */
    public final void checkSessionCookie(Map<String, String> headers) {
        if (headers.containsKey(SET_COOKIE_KEY)
                && headers.get(SET_COOKIE_KEY).startsWith(SESSION_COOKIE)) {
                String cookie = headers.get(SET_COOKIE_KEY);
                if (cookie.length() > 0) {
                    String[] splitCookie = cookie.split(";");
                    String[] splitSessionId = splitCookie[0].split("=");
                    cookie = splitSessionId[1];
                    Editor prefEditor = _preferences.edit();
                    prefEditor.putString(SESSION_COOKIE, cookie);
                    prefEditor.commit();
                }
            }
    }

    /**
     * Adds session cookie to headers if exists.
     * @param headers
     */
    public final void addSessionCookie(Map<String, String> headers) {
        String sessionId = _preferences.getString(SESSION_COOKIE, "");
        if (sessionId.length() > 0) {
            StringBuilder builder = new StringBuilder();
            builder.append(SESSION_COOKIE);
            builder.append("=");
            builder.append(sessionId);
            if (headers.containsKey(COOKIE_KEY)) {
                builder.append("; ");
                builder.append(headers.get(COOKIE_KEY));
            }
            headers.put(COOKIE_KEY, builder.toString());
        }
    }

}

答案 4 :(得分：4)

寻找这个问题的解决方案。 在这里看到一些东西：http://developer.android.com/training/volley/request.html

直接使用ImageRequest而不是ImageLoader是个好主意吗？似乎ImageLoader无论如何都在内部使用它。除了ImageLoader的缓存支持之外，它是否会遗漏任何其他重要内容？

ImageView mImageView;
String url = "http://i.imgur.com/7spzG.png";
mImageView = (ImageView) findViewById(R.id.myImage);
...

// Retrieves an image specified by the URL, displays it in the UI.
mRequestQueue = Volley.newRequestQueue(context);;
ImageRequest request = new ImageRequest(url,
  new Response.Listener() {
      @Override
      public void onResponse(Bitmap bitmap) {
          mImageView.setImageBitmap(bitmap);
      }
  }, 0, 0, null,
  new Response.ErrorListener() {
      public void onErrorResponse(VolleyError error) {
          mImageView.setImageResource(R.drawable.image_load_error);
      }
  })   {
    @Override
    public Map<String, String> getHeaders() throws AuthFailureError {
        Map<String, String> params = new Map<String, String>();
        params.put("User-Agent", "one");
        params.put("header22", "two");

        return params;
    };
mRequestQueue.add(request);

答案 5 :(得分：4)

您可以创建一个自定义Request类来扩展StringRequest并覆盖其中的getHeaders（）方法，如下所示：

public class CustomVolleyRequest extends StringRequest {

    public CustomVolleyRequest(int method, String url,
                           Response.Listener<String> listener,
                           Response.ErrorListener errorListener) {
        super(method, url, listener, errorListener);
    }

    @Override
    public Map<String, String> getHeaders() throws AuthFailureError {
        Map<String, String> headers = new HashMap<>();
        headers.put("key1","value1");
        headers.put("key2","value2");
        return headers;
    }
}

答案 6 :(得分：3)

试试这个

{
    @Override
       public Map<String, String> getHeaders() throws AuthFailureError {
           String bearer = "Bearer ".concat(token);
            Map<String, String> headersSys = super.getHeaders();
            Map<String, String> headers = new HashMap<String, String>();
            headersSys.remove("Authorization");
            headers.put("Authorization", bearer);
            headers.putAll(headersSys);
            return headers;
       }
};

答案 7 :(得分：2)

在科特林，

您必须覆盖 getHeaders（）方法，例如：

val volleyEnrollRequest = object : JsonObjectRequest(GET_POST_PARAM, TARGET_URL, PAYLOAD_BODY_IF_YOU_WISH,
            Response.Listener {
                // Success Part  
            },

            Response.ErrorListener {
                // Failure Part
            }
        ) {
            // Providing Request Headers

            override fun getHeaders(): Map<String, String> {
               // Create HashMap of your Headers as the example provided below

                val headers = HashMap<String, String>()
                headers["Content-Type"] = "application/json"
                headers["app_id"] = APP_ID
                headers["app_key"] = API_KEY

                return headers
            }
        }

答案 8 :(得分：1)

public function __construct()
{
    parent::__construct();
    //load model
    $this->load->model('billing_model');
            $this->load->library('cart');
}

public function index()
{   

    $data['products'] = $this->billing_model->get_all();

    $this->load->view('shopping_view2', $data);
}
function add()
{
        $insert_data = array(
        'id' => $this->input->post('id'),
        'name' => $this->input->post('name'),
        'price' => $this->input->post('price'),
        'qty' => 1
    );  

    $this->cart->insert($insert_data);
   //$success = $this->cart->insert($insert_data);
     $cart_check = $this->cart->contents();

 if(!empty($cart_check)){ 
    //$this->cart->contents(insert_data);
    $res = array('status' => 200, 'msg' => 'success');

}else{
    $res = array('status' => 500, 'msg' => 'No success');
}

echo json_encode($res);
//echo $data[0]['value'];
//redirect('shopping2');
}


    function remove($rowid) {
                // Check rowid value.
    if ($rowid==="all"){

        $this->cart->destroy();
    }else{

        $data = array(
            'rowid'   => $rowid,
            'qty'     => 0
        );

        $this->cart->update($data);
    }


    redirect('shopping2');
}

    function update_cart(){

            // Recieve post values,calcute them and update
            $cart_info =  $_POST['cart'] ;
    foreach( $cart_info as $id => $cart)
    {   
                $rowid = $cart['rowid'];
                $price = $cart['price'];
                $amount = $price * $cart['qty'];
                $qty = $cart['qty'];

                    $data = array(
            'rowid'   => $rowid,
                            'price'   => $price,
                            'amount' =>  $amount,
            'qty'     => $qty
        );

        $this->cart->update($data);
    }
    redirect('shopping2');        
}   

}

答案 9 :(得分：1)

另外，我想分享一些关于Content-Type的内容：

之上 
@Override
public Map<String, String> getHeaders() throws AuthFailureError {
Map<String, String> params = new HashMap<String, String>();
.
.
.
return params;
}

我不得不补充道：

@Override
public String getBodyContentType() {
return /*(for exmaple)*/ "application/json";
}

不要问我为什么，我只是认为它可能会帮助其他一些无法使Content-Type设置正确的人。

答案 10 :(得分：0)

这是从github示例设置标题：

StringRequest myReq = new StringRequest(Method.POST,
                       "http://ave.bolyartech.com/params.php",
                        createMyReqSuccessListener(),
                        createMyReqErrorListener()) {

 protected Map<String, String> getParams() throws 
         com.android.volley.AuthFailureError {
                        Map<String, String> params = new HashMap<String, String>();
                        params.put("param1", num1);
                        params.put("param2", num2);
                        return params;
                    };
                };
                queue.add(myReq);

答案 11 :(得分：0)

试试这个

 public void VolleyPostReqWithResponseListenerwithHeaders(String URL,final Map<String, String> params,final Map<String, String> headers,Response.Listener<String> responseListener) {


    String url = URL;

    Log.i("url:", ":" + url);
    StringRequest mStringRequest = new StringRequest(Request.Method.POST,
            url, responseListener, new Response.ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError error) {
            // error


            //Log.d("Error.Response", error.getLocalizedMessage());
        }
    }){
        @Override
        protected Map<String, String> getParams() {
            return params;
        }

        @Override
        public Map<String, String> getHeaders() throws AuthFailureError {
            return headers;
        }
    };



    mStringRequest.setRetryPolicy(new DefaultRetryPolicy(
            60000,
            DefaultRetryPolicy.DEFAULT_MAX_RETRIES,
            DefaultRetryPolicy.DEFAULT_BACKOFF_MULT));

    mStringRequest.setShouldCache(true);



    //  dialog.show();
    SingletonRequestQueue.getInstance(context).addToRequestQueue(mStringRequest);
}

答案 12 :(得分：0)

那是我的代码，别忘了=对象：如果不放就行不通

val queue = Volley.newRequestQueue(this)
        val url = "http://35.237.133.137:8080/lamarrullaWS/rest/lamarrullaAPI"
        // Request a string response from the provided URL.
        val jsonObjectRequest = object: JsonObjectRequest(Request.Method.GET, url, null,
                Response.Listener { response ->
                    txtPrueba.text = "Response: %s".format(response.toString())
                },
                Response.ErrorListener { txtPrueba.text = "That didn't work!" }
        )
        {
            @Throws(AuthFailureError::class)
            override fun getHeaders(): Map<String, String> {
                val headers = HashMap<String, String>()
                headers.put("Content-Type", "application/json")
                return headers
            }
        }
        queue.add(jsonObjectRequest)
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