how to send array of params using volley in android
I am developing an application which send lot of data to server.Now i want to send an array of params to a php page using volley.But i am not able to send it.
Code for adding params as Array.
String[] arr =new String[7];
for(int i=1;i<=7;i++)
{
arr[i]="questionId_"+i+"_"+"ans_"+i;
}
HashMap<String ,String[]> params=new HashMap<String, String[]>(7);
params.put("params", arr);
Code for making request to server
RequestQueue que=Volley.newRequestQueue(this);
final ProgressDialog dialog = new ProgressDialog(HealthMyHistory.this);
dialog.setTitle("Please Wait");
dialog.setMessage("Sending Data");
dialog.setCancelable(false);
dialog.show();
CustomJobjectRequest jsObjRequest = new CustomJobjectRequest(Method.POST, url, params, new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response)
{
dialog.dismiss();
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError response) {
dialog.dismiss();
Toast.makeText(getApplicationContext(), "Unable to Send Data!"+" "+response.toString(), Toast.LENGTH_SHORT).show();
}
});
que.add(jsObjRequest);
}
Problem is in CustomJobjectRequest there is no constructor available of type in which Hashmap accepts string & array as argument.How to do it ?
Code or CustomJsonObjectRequest
package com.example.healthcoach.data;
import java.io.UnsupportedEncodingException;
import java.util.HashMap;
import java.util.Map;
import org.json.JSONException;
import org.json.JSONObject;
import com.android.volley.NetworkResponse;
import com.android.volley.ParseError;
import com.android.volley.Request;
import com.android.volley.Response;
import com.android.volley.Response.ErrorListener;
import com.android.volley.Response.Listener;
import com.android.volley.toolbox.HttpHeaderParser;
public class CustomJobjectRequest extends Request<JSONObject>{
private Listener<JSONObject> listener;
private Map<String, String> params;
public CustomJobjectRequest(String url, Map<String, String> params,
Listener<JSONObject> reponseListener, ErrorListener errorListener) {
super(Method.POST, url, errorListener);
this.listener = reponseListener;
this.params = params;
}
public CustomJobjectRequest(int method, String url, Map<String, String> params,
Listener<JSONObject> reponseListener, ErrorListener errorListener) {
super(method, url, errorListener);
this.listener = reponseListener;
this.params = params;
}
public CustomJobjectRequest(int post, String url,
HashMap<String, String[]> params2, Listener<JSONObject> listener2,
ErrorListener errorListener) {
// TODO Auto-generated constructor stub
}
@Override
protected Map<String, String> getParams() throws com.android.volley.AuthFailureError {
return params;
};
@Override
protected void deliverResponse(JSONObject response) {
listener.onResponse(response);
}
@Override
protected Response<JSONObject> parseNetworkResponse(NetworkResponse response) {
try {
String jsonString = new String(response.data,
HttpHeaderParser.parseCharset(response.headers));
return Response.success(new JSONObject(jsonString),
HttpHeaderParser.parseCacheHeaders(response));
} catch (UnsupportedEncodingException e) {
return Response.error(new ParseError(e));
} catch (JSONException je) {
return Response.error(new ParseError(je));
}
}
}
Solution 1:
Use
HashMap<String ,String> params=new HashMap<String, String>(7);
for(int i=1;i<=7;i++)
{
params.put("params_"+i, arr[i]);
}
in CustomJobjectRequest
class because currently you are using String
type as value in Map in CustomJobjectRequest
class but sending String[]
type when create object of CustomJobjectRequest
class.
Edit:
To send all values in single parameter to server use JSONObject
.Create a json object using all key-value as:
JSONObject jsonObject=new JSONObject();
for(int i=1;i<=7;i++)
{
arr[i]="questionId_"+i+"_"+"ans_"+i;
jsonObject.put("params_"+i,arr[i]);
}
HashMap<String ,String> params=new HashMap<String, String>();
params.put("params",jsonObject.toString());
TO send all values on server side get params
and convert to JSON object and iterate to get all values
Solution 2:
Use
Map<String, String> postParam = new HashMap<>();
int i=0;
for(String object: friendIds){
postParam.put("friendIds["+(i++)+"]", object);
// you first send both data with same param name as friendnr[] .... now send with params friendnr[0],friendnr[1] ..and so on
}
this work for me, hope it work to you.