Json Android

package com.example.json;

import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.AdapterView;
import android.widget.ArrayAdapter;
import android.widget.Spinner;
import android.widget.TextView;
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.JsonArrayRequest;
import com.android.volley.toolbox.StringRequest;
import com.android.volley.toolbox.Volley;
import com.example.json.api.ApiRequestBiodata;
import com.example.json.api.Retroserver;
import com.example.json.model.ResponsModel;
import com.google.gson.JsonArray;

import android.support.design.widget.Snackbar;
import android.widget.Toast;
import android.widget.TwoLineListItem;

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

import java.lang.reflect.Array;

import retrofit2.Call;
import retrofit2.Callback;

public class MainActivity extends AppCompatActivity {
    TextView txtTitle, txtBody;
    String JSON_STRING = "{\"employee\":{\"name\":\"Abhishek Saini\",\"salary\":65000}}";

    private Spinner spNamen2;
    private String[] germanFeminine = {
            "Karin",
            "Ingrid", "Helga",
            "Renate",
            "Elke",
            "Ursula",
            "Erika",
            "Christa",
            "Gisela",
            "Monika"
    };

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        txtTitle = (TextView) findViewById(R.id.txtTitle);
        txtBody = (TextView) findViewById(R.id.txtBody);
        getData();

        spNamen2 = (Spinner) findViewById(R.id.sp_name_2);

        // inisialiasi Array Adapter dengan memasukkan string array di atas




        final ArrayAdapter<String> adapter = new ArrayAdapter<>(this,
                android.R.layout.simple_spinner_item, germanFeminine);

        // mengeset Array Adapter tersebut ke Spinner
        spNamen2.setAdapter(adapter);

        // mengeset listener untuk mengetahui saat item dipilih
        spNamen2.setOnItemSelectedListener(new AdapterView.OnItemSelectedListener() {
            @Override
            public void onItemSelected(AdapterView<?> adapterView, View view, int i, long l) {
                // memunculkan toast + value Spinner yang dipilih (diambil dari adapter)
                //Toast.makeText(TWO,"Selected "+ adapter.getItem(i), Toast.LENGTH_SHORT).show();
            }

            @Override
            public void onNothingSelected(AdapterView<?> adapterView) {

            }
        });
    }

    void getData() {
// Instantiate the RequestQueue.
        RequestQueue queue = Volley.newRequestQueue(this);
        String url = "https://tandon-iot.000webhostapp.com/data/get_all?token=ucmDogj2M4d9IrBx6U1nPW3zKRpkysb8E5CaiFNVveHAwtG7ZJ";
        //String url = "https://jsonplaceholder.typicode.com/posts/1";

        final JSONObject jsonBody = new JSONObject();
        final String requestBody = jsonBody.toString();

// Request a string response from the provided URL.
        StringRequest stringRequest = new StringRequest(Request.Method.GET, url,
                new Response.Listener<String>() {
                    @Override
                    public void onResponse(String response) {
                        try {
//menaruh data JSON kkedalam variabel JSON Object
                            JSONObject jsonPost = new JSONObject(response.toString());
                            txtBody.setText(jsonPost.getJSONArray("nama").toString());
                            txtTitle.setText(jsonPost.getString("nama"));


//men set data ke dalam tampilan


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

                    }
                }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {
                Log.d("Error Response", error.toString());
                Snackbar.make(null, "Error Response", Snackbar.LENGTH_LONG).show();
            }
        });
// Add the request to the RequestQueue.
        queue.add(stringRequest);

    }