[英]android - volley JsonArrayRequest join StringRequest post
I wan't send post from JsonArrayRequest to server and I found some answer and I trying it.. 我不会将帖子从JsonArrayRequest发送到服务器,但找到了答案,然后尝试了。
but I got error like this 但我有这样的错误
this is my code 这是我的代码
HashMap<String, String> params = new HashMap<String, String>();
public void JSON_DATA_WEB_CALL() {
jsonArrayRequest = new JsonArrayRequest(GET_JSON_DATA_HTTP_URL, new JSONObject(params),
new Response.Listener<JSONArray>() {
@Override
public void onResponse(JSONArray response) {
JSON_PARSE_DATA_AFTER_WEBCALL(response);
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
}
}){
@Override
public Map<String, String> getHeaders() throws AuthFailureError {
HashMap<String, String> headers = new HashMap<String, String>();
headers.put("CUSTOM_HEADER", "Yahoo");
headers.put("ANOTHER_CUSTOM_HEADER", "Google");
return headers;
}
};
requestQueue = Volley.newRequestQueue(this);
requestQueue.add(jsonArrayRequest);
}
how to fix that? 如何解决?
Use this custom class. 使用此自定义类。
public class CustomJsonArrayRequest extends JsonRequest<JSONArray> {
/**
* 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 CustomJsonArrayRequest(int method, String url, JSONObject jsonRequest,
Response.Listener<JSONArray> listener, Response.ErrorListener errorListener) {
super(method, url, (jsonRequest == null) ? null : jsonRequest.toString(), listener,
errorListener);
}
@Override
protected Response<JSONArray> parseNetworkResponse(NetworkResponse response) {
try {
String jsonString = new String(response.data,
HttpHeaderParser.parseCharset(response.headers, PROTOCOL_CHARSET));
return Response.success(new JSONArray(jsonString),
HttpHeaderParser.parseCacheHeaders(response));
} catch (UnsupportedEncodingException e) {
return Response.error(new ParseError(e));
} catch (JSONException je) {
return Response.error(new ParseError(je));
}
}
}
Implementation in your case should be something like this: 您的情况下的实现应如下所示:
HashMap<String, String> params = new HashMap<String, String>();
public void JSON_DATA_WEB_CALL() {
CustomJsonArrayRequest request = new CustomJsonArrayRequest (Request.Method.POST, GET_JSON_DATA_HTTP_URL, new JSONObject(params),
new Response.Listener<JSONArray>() {
@Override
public void onResponse(JSONArray response) {
JSON_PARSE_DATA_AFTER_WEBCALL(response);
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
}
}){
@Override
public Map<String, String> getHeaders() throws AuthFailureError {
HashMap<String, String> headers = new HashMap<String, String>();
headers.put("CUSTOM_HEADER", "Yahoo");
headers.put("ANOTHER_CUSTOM_HEADER", "Google");
return headers;
}
};
requestQueue = Volley.newRequestQueue(this);
requestQueue.add(request);
}
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