JsonArrayRequest not working in Android Studio: Can not resolve constructor

Question

I'm quite new to Java/Android Studio and am spending the past two days figuring this out, without succes. I keep getting: Cannot resolve constructor 'JsonArrayRequest(int, java.lang.String, java.lang.String, anonymous com.android.volley.Response.Listener)'

On other threads I see answers that suggest to replace the null to a string or cast the null but this doesn't seem to make the trick.

I'm trying to read the JSON Array at https://www.smartvibes.be/profiles/api/profileview.php?id=5073 for instance.

This is my code:

package com.smartvibes.smartbeat;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.widget.TextView;
import android.widget.Toast;

import com.android.volley.Request;
import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.toolbox.JsonArrayRequest;
import com.android.volley.toolbox.Volley;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

public class profileViewActivity extends AppCompatActivity {
    RequestQueue rs;
    String url,id, nick, age, city, mainpic, numpics, extrapic0, extrapic1, extrapic2, extrapic3, extrapic4, extrapic5;
    TextView profileIntro;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_profile_view);
        Bundle getProfileId = getIntent().getExtras();
        if(getProfileId == null){
            return;
        }
        String profileid = getProfileId.getString("profileid");
        url = "https://www.smartvibes.be/profiles/api/profileview.php?id="+profileid;
        rs = Volley.newRequestQueue(this);
        sendjsonrequest();
        profileIntro = (TextView) findViewById(R.id.profileIntro);
        //profileIntro.setText(profileData.getPnick());
        profileIntro.setText(profileid);
    }

    public void sendjsonrequest(){
        JsonArrayRequest jsonArrayRequest = new JsonArrayRequest(Request.Method.GET, url, "", new Response.Listener<JSONArray>() {
            @Override
            public void onResponse(JSONArray response) {
                try {

                // Get current json Array
                JSONArray profile = new JSONArray(response);
                        JSONObject jresponse = profile.getJSONObject(0);
                        Toast.makeText(profileViewActivity.this, "test", Toast.LENGTH_LONG).show();
                        nick = jresponse.getString("nick");
                        age = jresponse.getString("age");
                        city = jresponse.getString("city");
                        mainpic = jresponse.getString("mainpic");
                        numpics = jresponse.getString("numpics");

                } catch (JSONException e) {
                    e.printStackTrace();
                }
            }

        });
        rs.add(jsonArrayRequest);
    }
}

When trying to run it I get:

error: no suitable constructor found for JsonArrayRequest(int,String,String,<anonymous Listener<JSONArray>>)
constructor JsonArrayRequest.JsonArrayRequest(String,Listener<JSONArray>,ErrorListener) is not applicable
(actual and formal argument lists differ in length)
constructor JsonArrayRequest.JsonArrayRequest(int,String,JSONArray,Listener<JSONArray>,ErrorListener) is not applicable
(actual and formal argument lists differ in length)

I'm probably doing something (or several things) bad... But can't figure out what.

changing "" to null gives the same error

Fredds
– Fredds

2018-10-10 15:16:12 +00:00
Commented Oct 10, 2018 at 15:16 — Fredds
– Fredds, Commented Oct 10, 2018 at 15:16

Radesh · Accepted Answer · 2018-10-10 15:28:54Z

You miss Response.ErrorListener()

Use this

 JsonArrayRequest jsonArrayRequest = new JsonArrayRequest(
                    Request.Method.GET,
                    url,
                    null,
                    new Response.Listener<JSONArray>() {
                        @Override
                        public void onResponse(JSONArray response) {
                            try {

                 // Get current json Array
                 JSONArray profile = new JSONArray(response);
                          JSONObject jresponse = profile.getJSONObject(0);
                          Toast.makeText(profileViewActivity.this, "test", Toast.LENGTH_LONG).show();
                          nick = jresponse.getString("nick");
                          age = jresponse.getString("age");
                          city = jresponse.getString("city");
                          mainpic = jresponse.getString("mainpic");
                          numpics = jresponse.getString("numpics");

                  } catch (JSONException e) {
                      e.printStackTrace();
                  }
                        }
                    },
                    new Response.ErrorListener(){
                        @Override
                        public void onErrorResponse(VolleyError error){
                            // Do something when error occurred
                            Snackbar.make(
                                    mCLayout,
                                    "Error...",
                                    Snackbar.LENGTH_LONG
                            ).show();
                        }
                    }
            );

Hope it's help

ʍѳђઽ૯ท · Accepted Answer · 2018-10-10 15:34:59Z

1

Everything seems fine in your codes except ErrorListener.

If you check the source of the JsonArrayRequest, you'll notice that it takes another method as the last parameter which handles the errors which you don't have it.

Simply, adding the Response.ErrorListener() right after the onResponse() method will solve the issue.

You can however make it null to ignore errors, which is not recommended.

Take a look: https://android--examples.blogspot.com/2017/02/android-volley-json-array-request.html

answered Oct 10, 2018 at 15:34

ʍѳђઽ૯ท

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