getting error org.json.JSONException: Value <pre of type java.lang.String cannot be converted to JSONObject

Question

I want to access my Android apps through Web-Service. but getting error in my android app ,

i am using volley & POST method for login.. `public class Main extends AppCompatActivity implements View.OnClickListener { public static final String LOGIN_URL = "http://10.54.103.8:4067/evivaservices/Webservices/login";

public static final String KEY_USERNAME="username";
public static final String KEY_PASSWORD="password";

private EditText editTextUsername;
private EditText editTextPassword;
private Button buttonLogin;

private String username;
private String password;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.login_layout);

    editTextUsername = (EditText) findViewById(R.id.username1);
    editTextPassword = (EditText) findViewById(R.id.password1);

    buttonLogin = (Button) findViewById(R.id.login_button);

    buttonLogin.setOnClickListener(this);
}
private void userLogin() {
    username = editTextUsername.getText().toString().trim();
    password = editTextPassword.getText().toString().trim();

    StringRequest stringRequest = new StringRequest(Request.Method.POST, LOGIN_URL,
            new Response.Listener<String>() {
                @Override
                public void onResponse(String response) {
                    try
                    {
                        JSONObject jsonObject = new JSONObject(response);
                        Next();
                    }
                    catch(JSONException e)
                    {
                    e.printStackTrace();
                    }
                }
            },
            new Response.ErrorListener() {
                @Override
                public void onErrorResponse(VolleyError error) {
                    Toast.makeText(getApplicationContext(),error.toString(), Toast.LENGTH_LONG ).show();
                }
            }){
        @Override
        protected Map<String, String> getParams() throws AuthFailureError {
            Map<String,String> map = new HashMap<String,String>();
            map.put(KEY_USERNAME,username);
            map.put(KEY_PASSWORD,password);
            return map;
        }
    };

    RequestQueue requestQueue = Volley.newRequestQueue(this);
    requestQueue.add(stringRequest);
}

private void Next(){
    Intent intent = new Intent(this, HomeScreen.class);
    intent.putExtra(KEY_USERNAME, username);
    startActivity(intent);
}
@Override
public void onClick(View v)
{
userLogin();
}

} `

JSON DATA


{
  "id": 31,
  "username": "[email protected]",
  "user_image": "http:\/\/103.54.103.8:4067\/evivaservices\/img\/profile_31.png",
  "err-code": 0
}

`

Your code should not compile in first instance, as you are missing a ;. To solve your issue, remove the line JSONArray jsonArray=jsonObject.getJSONArray("err-code") — Prerak Sola
– Prerak Sola, Commented Aug 1, 2016 at 10:31
yes bro...i solved .this.by JsonObjectRequest method..thanx for suggest me...but i dont know why my reputation decreased — Chandeshwar Thakur
– Chandeshwar Thakur, Commented Aug 1, 2016 at 12:33
@chandeshwar Thakur: That is because someone downvoted your question :( — AndiGeeky
– AndiGeeky, Commented Aug 2, 2016 at 5:02

AndiGeeky · Accepted Answer · 2016-08-02 05:45:38Z

Please change your StringRequest to JsonRequest as below:

 JsonRequest jsonRequest = new JsonRequest(Request.Method.POST, LOGIN_URL, new Response.Listener<>() {
        @Override
        public void onResponse(Object response) {
            try {
                Next();
            } catch (JSONException e) {
                e.printStackTrace();
            }
        }
    }, new Response.ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError error) {
            Toast.makeText(getApplicationContext(), error.toString(), Toast.LENGTH_LONG).show();
        }
    }) {
        @Override
        protected Map<String, String> getParams() throws AuthFailureError {
            Map<String, String> map = new HashMap<String, String>();
            map.put(KEY_USERNAME, username);
            map.put(KEY_PASSWORD, password);
            return map;
        }

        @Override
        protected Response parseNetworkResponse(NetworkResponse response) {
            return null;
        }

        @Override
        public int compareTo(Object another) {
            return 0;
        }
    };

Thank You.

Ashish P · Accepted Answer · 2016-08-01 10:29:13Z

0

Hello dear you made a mistake while you parsing the response

 JSONArray jsonArray=jsonObject.getJSONArray("err-code")

remove above the line and then parse again.

answered Aug 1, 2016 at 10:29

Ashish P

3,06621 silver badges41 bronze badges

Comments

cake double · Accepted Answer · 2016-08-02 00:27:56Z

0

In you JSON DATA, I not find array, so you shouldn't use JsonArray, you can delete this line in your code :JSONArray jsonArray=jsonObject.getJSONArray("err-code").

edited Aug 2, 2016 at 0:27

answered Aug 1, 2016 at 10:32

cake double

605 bronze badges

3 Comments

Chandeshwar Thakur Over a year ago

check it code properly...getting error at JSONObject jsonObject = new JSONObject(response);

AesSedai101 Over a year ago

Please explain why this fixes the problem

cake double Over a year ago

@AesSedai101 JSONArray is used for JSON data has this snipped like "result" : [ {"value1": 1} , {"value2":2} , {"value3":3} ]. you konw JSON data has array. In this case, you must use JSONArray class.

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