使用volley发送带有JSON数据的POST请求我想寄一个新的JsonObjectRequest请求:我想接收JSON数据(来自服务器的响应):好的我想将带有此请求的JSON格式化数据发送到服务器JsonObjectRequest request = new JsonObjectRequest(
Request.Method.POST, "myurl.com", null,
new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
//...
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
//...
}
})
{
@Override
protected Map<String,String> getParams() {
// something to do here ??
return params;
}
@Override
public Map<String, String> getHeaders() throws AuthFailureError {
// something to do here ??
return params;
}
};我在我的项目中也使用了gson库。
3 回答
临摹微笑
TA贡献1982条经验 获得超2个赞
JsonObjectRequestJSONObject
final String url = "some/url";final JSONObject jsonBody = new JSONObject("{\"type\":\"example\"}");new JsonObjectRequest(url, jsonBody, new Response.Listener<JSONObject>() { ... });@param jsonRequest):
/**
* Creates a new request.
* @param method the HTTP method to use
* @param url URL to fetch the JSON from
* @param jsonRequest A {@link JSONObject} to post with the request. Null is allowed and
* indicates no parameters will be posted along with request.
* @param listener Listener to receive the JSON response
* @param errorListener Error listener, or null to ignore errors.
*/public JsonObjectRequest(int method, String url, JSONObject jsonRequest,
Listener<JSONObject> listener, ErrorListener errorListener) {
super(method, url, (jsonRequest == null) ? null : jsonRequest.toString(), listener,
errorListener);}
www说
TA贡献1775条经验 获得超8个赞
这,这个 JSONObjectRequest并不完美:你必须期待 JSON最后(见 Response.Listener<JSONObject>).空响应(仅为200状态)怎么办? 如果我想直接从 ResponseListener?
/**
* Created by laurentmeyer on 25/07/15.
*/
public class GenericRequest<T> extends JsonRequest<T> {
private final Gson gson = new Gson();
private final Class<T> clazz;
private final Map<String, String> headers;
// Used for request which do not return anything from the server
private boolean muteRequest = false;
/**
* Basically, this is the constructor which is called by the others.
* It allows you to send an object of type A to the server and expect a JSON representing a object of type B.
* The problem with the #JsonObjectRequest is that you expect a JSON at the end.
* We can do better than that, we can directly receive our POJO.
* That's what this class does.
*
* @param method: HTTP Method
* @param classtype: Classtype to parse the JSON coming from the server
* @param url: url to be called
* @param requestBody: The body being sent
* @param listener: Listener of the request
* @param errorListener: Error handler of the request
* @param headers: Added headers
*/
private GenericRequest(int method, Class<T> classtype, String url, String requestBody,
Response.Listener<T> listener, Response.ErrorListener errorListener, Map<String, String> headers) {
super(method, url, requestBody, listener,
errorListener);
clazz = classtype;
this.headers = headers;
configureRequest();
}
/**
* Method to be called if you want to send some objects to your server via body in JSON of the request (with headers and not muted)
*
* @param method: HTTP Method
* @param url: URL to be called
* @param classtype: Classtype to parse the JSON returned from the server
* @param toBeSent: Object which will be transformed in JSON via Gson and sent to the server
* @param listener: Listener of the request
* @param errorListener: Error handler of the request
* @param headers: Added headers
*/
public GenericRequest(int method, String url, Class<T> classtype, Object toBeSent,
Response.Listener<T> listener, Response.ErrorListener errorListener, Map<String, String> headers) {
this(method, classtype, url, new Gson().toJson(toBeSent), listener,
errorListener, headers);
}
/**
* Method to be called if you want to send some objects to your server via body in JSON of the request (without header and not muted)
*
* @param method: HTTP Method
* @param url: URL to be called
* @param classtype: Classtype to parse the JSON returned from the server
* @param toBeSent: Object which will be transformed in JSON via Gson and sent to the server
* @param listener: Listener of the request
* @param errorListener: Error handler of the request
*/
public GenericRequest(int method, String url, Class<T> classtype, Object toBeSent,
Response.Listener<T> listener, Response.ErrorListener errorListener) {
this(method, classtype, url, new Gson().toJson(toBeSent), listener,
errorListener, new HashMap<String, String>());
}
/**
* Method to be called if you want to send something to the server but not with a JSON, just with a defined String (without header and not muted)
*
* @param method: HTTP Method
* @param url: URL to be called
* @param classtype: Classtype to parse the JSON returned from the server
* @param requestBody: String to be sent to the server
* @param listener: Listener of the request
* @param errorListener: Error handler of the request
*/
public GenericRequest(int method, String url, Class<T> classtype, String requestBody,
Response.Listener<T> listener, Response.ErrorListener errorListener) {
this(method, classtype, url, requestBody, listener,
errorListener, new HashMap<String, String>());
}
/**
* Method to be called if you want to GET something from the server and receive the POJO directly after the call (no JSON). (Without header)
*
* @param url: URL to be called
* @param classtype: Classtype to parse the JSON returned from the server
* @param listener: Listener of the request
* @param errorListener: Error handler of the request
*/
public GenericRequest(String url, Class<T> classtype, Response.Listener<T> listener, Response.ErrorListener errorListener) {
this(Request.Method.GET, url, classtype, "", listener, errorListener);
}
/**
* Method to be called if you want to GET something from the server and receive the POJO directly after the call (no JSON). (With headers)
*
* @param url: URL to be called
* @param classtype: Classtype to parse the JSON returned from the server
* @param listener: Listener of the request
* @param errorListener: Error handler of the request
* @param headers: Added headers
*/
public GenericRequest(String url, Class<T> classtype, Response.Listener<T> listener, Response.ErrorListener errorListener, Map<String, String> headers) {
this(Request.Method.GET, classtype, url, "", listener, errorListener, headers);
}
/**
* Method to be called if you want to send some objects to your server via body in JSON of the request (with headers and muted)
*
* @param method: HTTP Method
* @param url: URL to be called
* @param classtype: Classtype to parse the JSON returned from the server
* @param toBeSent: Object which will be transformed in JSON via Gson and sent to the server
* @param listener: Listener of the request
* @param errorListener: Error handler of the request
* @param headers: Added headers
* @param mute: Muted (put it to true, to make sense)
*/
public GenericRequest(int method, String url, Class<T> classtype, Object toBeSent,
Response.Listener<T> listener, Response.ErrorListener errorListener, Map<String, String> headers, boolean mute) {
this(method, classtype, url, new Gson().toJson(toBeSent), listener,
errorListener, headers);
this.muteRequest = mute;
}
/**
* Method to be called if you want to send some objects to your server via body in JSON of the request (without header and muted)
*
* @param method: HTTP Method
* @param url: URL to be called
* @param classtype: Classtype to parse the JSON returned from the server
* @param toBeSent: Object which will be transformed in JSON via Gson and sent to the server
* @param listener: Listener of the request
* @param errorListener: Error handler of the request
* @param mute: Muted (put it to true, to make sense)
*/
public GenericRequest(int method, String url, Class<T> classtype, Object toBeSent,
Response.Listener<T> listener, Response.ErrorListener errorListener, boolean mute) {
this(method, classtype, url, new Gson().toJson(toBeSent), listener,
errorListener, new HashMap<String, String>());
this.muteRequest = mute;
}
/**
* Method to be called if you want to send something to the server but not with a JSON, just with a defined String (without header and not muted)
*
* @param method: HTTP Method
* @param url: URL to be called
* @param classtype: Classtype to parse the JSON returned from the server
* @param requestBody: String to be sent to the server
* @param listener: Listener of the request
* @param errorListener: Error handler of the request
* @param mute: Muted (put it to true, to make sense)
*/
public GenericRequest(int method, String url, Class<T> classtype, String requestBody,
Response.Listener<T> listener, Response.ErrorListener errorListener, boolean mute) {
this(method, classtype, url, requestBody, listener,
errorListener, new HashMap<String, String>());
this.muteRequest = mute;
}
@Override
protected Response<T> parseNetworkResponse(NetworkResponse response) {
// The magic of the mute request happens here
if (muteRequest) {
if (response.statusCode >= 200 && response.statusCode <= 299) {
// If the status is correct, we return a success but with a null object, because the server didn't return anything
return Response.success(null, HttpHeaderParser.parseCacheHeaders(response));
}
} else {
try {
// If it's not muted; we just need to create our POJO from the returned JSON and handle correctly the errors
String json = new String(response.data, HttpHeaderParser.parseCharset(response.headers));
T parsedObject = gson.fromJson(json, clazz);
return Response.success(parsedObject, HttpHeaderParser.parseCacheHeaders(response));
} catch (UnsupportedEncodingException e) {
return Response.error(new ParseError(e));
} catch (JsonSyntaxException e) {
return Response.error(new ParseError(e));
}
}
return null;
}
@Override
public Map<String, String> getHeaders() throws AuthFailureError {
return headers != null ? headers : super.getHeaders();
}
private void configureRequest() {
// Set retry policy
// Add headers, for auth for example
// ...
}
}解析为POJO/Header的请求手动设置/POJO发送 解析为POJO/POJO以发送响应的请求 解析为POJO/String以发送响应的请求 解析为POJO(GET)的响应的请求 将响应解析为POJO(GET)/Header手动设置的请求 没有响应的请求(200-空体)/头手动设置/POJO发送 没有响应的请求(200-空体)/POJO发送 没有响应的请求(200-空体)/字符串发送
compile 'com.google.code.gson:gson:x.y.z'
2.3.1).
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TA贡献1877条经验 获得超1个赞
final String URL = "/volley/resource/12";// Post params to be sent to the serverHashMap<String, String> params = new HashMap<String, String>();params.put("token", "AbCdEfGh123456");JsonObjectRequest req = new JsonObjectRequest(URL, new JSONObject(params),
new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
try {
VolleyLog.v("Response:%n %s", response.toString(4));
} catch (JSONException e) {
e.printStackTrace();
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
VolleyLog.e("Error: ", error.getMessage());
}
});// add the request object to the queue to be executedApplicationController.getInstance().addToRequestQueue(req);- 3 回答
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