我已经尝试过此代码，但没有成功，这是第一种方法：
String api = "address mvc api";
StringRequest jsonObjRequest = new StringRequest(Request.Method.POST,api,
new Response.Listener<String>() {
@Override
public void onResponse(String response) {
Log.e("tahg" , ""+response);
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
VolleyLog.d("volley", "Error: " + error.getMessage());
}
}) {
@Override
public String getBodyContentType() {
return "application/json";
}
@Override
protected Map<String, String> getParams() throws AuthFailureError {
Map<String, String> parametr = new HashMap<String, String>();
parametr.put("parametr1", "parametr1");
parametr.put("parametr2", "parametr2");
parametr.put("parametr3", "parametr3");
return parametr;
}
};
RequestQueue requestqueue = Volley.newRequestQueue(getApplicationContext());
requestqueue.add(jsonObjRequest);
第二种方法是它也没有用：
HashMap<String, String> params = new HashMap<String, String>();
params.put("parametr1", "value1");
params.put("parametr1", "value2");
params.put("parametr1", "value3");
params.put("location2", "0");
String api = "address api";
JsonObjectRequest jor = new JsonObjectRequest(Request.Method.POST, api, new JSONObject(params), new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
Toast.makeText(getApplicationContext(), "Login Successful!", Toast.LENGTH_LONG).show();
//do other things with the received JSONObject
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
}
}) {
@Override
public Map<String, String> getHeaders() throws AuthFailureError {
HashMap<String, String> pars = new HashMap<String, String>();
pars.put("Content-Type", "application/json; charset=utf-8");
return pars;
}
}
;
//add to the request queue
RequestQueue requestqueue = Volley.newRequestQueue(getApplicationContext());
requestqueue.add(jor);
而且我应该提到，我已经尝试了两种方式使用这些内容类型标题：
1-"application/json"
2-"application/json; charset=utf-8"
3-"application/x-www-form-urlencoded"
4-"application/x-www-form-urlencoded; charset=utf-8"
不幸的是总是得到这个错误：
Volley: [420] BasicNetwork.performRequest: Unexpected response code 400 for
api地址是：
http://www.api.manelin.com/api/Insert_Advertising
这是几年前我在一个项目中遇到的事情，我只是想起它，也许可以为您提供帮助：我编写了该类，以使用MVC API上传图像：
import android.graphics.Bitmap;
import android.util.Log;
import com.android.volley.AuthFailureError;
import com.android.volley.DefaultRetryPolicy;
import com.android.volley.Request;
import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.BasicNetwork;
import com.android.volley.toolbox.DiskBasedCache;
import com.android.volley.toolbox.HurlStack;
import com.android.volley.toolbox.ImageRequest;
import com.android.volley.toolbox.JsonObjectRequest;
import com.android.volley.toolbox.StringRequest;
import com.android.volley.toolbox.Volley;
import org.json.JSONObject;
import java.util.HashMap;
import java.util.Map;
import static ir.hpbyp.app.industapp.utils.G.context;
/**
* Created by pc_vahid on 3/28/2016.
*/
public class helperVolley {
private JsonListner dataRecivedListener;
private ImageListener ImageListener;
private Response.ErrorListener volleyErrorListener;
private String url;
private String url_place_title;
/**
* @param URL
* @param JsonListner
*/
public helperVolley(String URL, JsonListner JsonListner) {
this.url = URL;
this.dataRecivedListener = JsonListner;
}
public helperVolley(String URL, ImageListener imageListener) {
this.url = URL;
this.ImageListener = imageListener;
}
public void ApiPostMethode(Map<String, String> JSONDATA) {
final RequestQueue queue = Volley.newRequestQueue(context);
final JsonObjectRequest jsonSend = new JsonObjectRequest(Request.Method.POST, url, new JSONObject(JSONDATA),
new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
Log.i("test", "data :" + response.toString());
dataRecivedListener.dataReciver(response.toString());
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Log.i("test", "data error:" + error.toString());
}
}
) {
@Override
public String getPostBodyContentType() {
return "application/x-www-form-urlencoded";
}
};
jsonSend.setRetryPolicy(new DefaultRetryPolicy(
10000,
DefaultRetryPolicy.DEFAULT_MAX_RETRIES,
DefaultRetryPolicy.DEFAULT_BACKOFF_MULT));
queue.add(jsonSend);
}
static RequestQueue queue;
public void ApiGetMethode() {
queue = Volley.newRequestQueue(context);
StringRequest stringRequest = new StringRequest(Request.Method.GET, url,
new Response.Listener<String>() {
@Override
public void onResponse(String response) {
Log.i("test", "data :" + response.toString());
dataRecivedListener.dataReciver(response);
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Log.i("test", "error :" + error.toString());
}
});
stringRequest.setRetryPolicy(new DefaultRetryPolicy(
100000,
DefaultRetryPolicy.DEFAULT_MAX_RETRIES,
DefaultRetryPolicy.DEFAULT_BACKOFF_MULT));
queue.add(stringRequest);
}
public static void cancelRequests() {
queue.cancelAll(new RequestQueue.RequestFilter() {
@Override
public boolean apply(Request<?> request) {
return true;
}
});
}
public void cancel() {
if (queue != null) {
queue.cancelAll(new RequestQueue.RequestFilter() {
@Override
public boolean apply(Request<?> request) {
return true;
}
});
}
}
public void ApiPostMethodeWithError(Map<String, String> JSONDATA, Response.ErrorListener volleyerrorlistener) {
this.volleyErrorListener = volleyerrorlistener;
queue = Volley.newRequestQueue(context);
final JsonObjectRequest jsonSend = new JsonObjectRequest(Request.Method.POST, url, new JSONObject(JSONDATA),
new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
dataRecivedListener.dataReciver(response.toString());
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Log.e("onTextChanged4", error.toString());
}
}
) {
@Override
public String getPostBodyContentType() {
return "application/x-www-form-urlencoded";
}
};
queue.add(jsonSend);
}
public void ApiPostStringRequestWithError(final Map<String, String> JSONDATA, Response.ErrorListener volleyerrorlistener) {
queue = Volley.newRequestQueue(context);
StringRequest sr = new StringRequest(Request.Method.POST, url, new Response.Listener<String>() {
@Override
public void onResponse(String response) {
dataRecivedListener.dataReciver(response);
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
dataRecivedListener.dataReciver(error.toString());
}
}) {
@Override
protected Map<String, String> getParams() {
Map<String, String> params = JSONDATA;
return params;
}
@Override
public Map<String, String> getHeaders() throws AuthFailureError {
Map<String, String> params = new HashMap<String, String>();
// Removed this line if you dont need it or Use application/json
// params.put("Content-Type", "application/x-www-form-urlencoded");
return params;
}
};
queue.add(sr);
}
public void ApiGetMethodeWithError(Response.ErrorListener volleyerrorlistener) {
DiskBasedCache cache = new DiskBasedCache(context.getCacheDir(), 16 * 1024 * 1024);
queue = new RequestQueue(cache, new BasicNetwork(new HurlStack()));
queue.start();
this.volleyErrorListener = volleyerrorlistener;
queue = Volley.newRequestQueue(context);
StringRequest stringRequest = new StringRequest(Request.Method.GET, url,
new Response.Listener<String>() {
@Override
public void onResponse(String response) {
Log.i("test", "data :" + response.toString());
dataRecivedListener.dataReciver(response);
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
volleyErrorListener.onErrorResponse(error);
}
});
queue.add(stringRequest);
}
public void GetMethodeObject(final Response.ErrorListener volleyerrorlistener) {
DiskBasedCache cache = new DiskBasedCache(context.getCacheDir(), 16 * 1024 * 1024);
queue = new RequestQueue(cache, new BasicNetwork(new HurlStack()));
queue.start();
this.volleyErrorListener = volleyerrorlistener;
queue = Volley.newRequestQueue(context);
JsonObjectRequest jsonObjReq = new JsonObjectRequest(Request.Method.GET,
url, null, new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
Log.i("test", "data :" + response.toString());
dataRecivedListener.dataReciver(response.toString());
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Log.i("test", "ERROR :" + error.toString());
volleyerrorlistener.onErrorResponse(error);
}
});
queue.add(jsonObjReq);
}
/**
* @ this method get the image from the url
*/
public void LoadImage() {
ImageRequest request = new ImageRequest(url,
new Response.Listener<Bitmap>() {
@Override
public void onResponse(Bitmap bitmap) {
ImageListener.ImageRecived(bitmap);
}
}, 0, 0, null,
new Response.ErrorListener() {
public void onErrorResponse(VolleyError error) {
}
});
queue.add(request);
}
public void ApiPostStringRequestWithToken(final Map<String, String> JSONDATA, Response.ErrorListener volleyerrorlistener) {
queue = Volley.newRequestQueue(context);
StringRequest sr = new StringRequest(Request.Method.POST, url, new Response.Listener<String>() {
@Override
public void onResponse(String response) {
dataRecivedListener.dataReciver(response);
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
dataRecivedListener.dataReciver(error.toString());
}
}) {
@Override
protected Map<String, String> getParams() {
return JSONDATA;
}
@Override
public Map<String, String> getHeaders() throws AuthFailureError {
Map<String, String> params = new HashMap<String, String>();
params.put("authorization", token);
return params;
}
@Override
public String getBodyContentType() {
return "application/x-www-form-urlencoded";
}
};
queue.add(sr);
}
public String token = "bearer token"; // you should change this token
}
这是我在以上课程中使用的侦听器：
public interface JsonListner {
/**
* @param JSON_DATA
*/
void dataReciver(String JSON_DATA);
}
这是使用辅助齐射的示例之一：
helperVolley helperVolley = new helperVolley("your url", new JsonListner() {
@Override
public void dataReciver(String JSON_DATA) {
}
});
helperVolley.ApiGetMethode();