MainActivity

package me.indsc.appp;

import android.os.Handler;
import android.support.design.widget.FloatingActionButton;
import android.support.v4.widget.SwipeRefreshLayout;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.support.v7.widget.LinearLayoutManager;
import android.support.v7.widget.RecyclerView;
import android.support.v7.widget.Toolbar;
import android.util.Log;
import android.view.View;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.TextView;
import android.widget.Toast;

import com.androidnetworking.AndroidNetworking;
import com.androidnetworking.common.Priority;
import com.androidnetworking.error.ANError;
import com.androidnetworking.interfaces.JSONArrayRequestListener;

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

import java.util.ArrayList;
import java.util.List;

import me.indsc.appp.helper.Config;
import me.indsc.appp.helper.DataSoal;
import me.indsc.appp.helper.ListAdapterSoal;


public class MainActivity extends AppCompatActivity {

    private static final String TAG = "SoalActivity";
    private List<DataSoal> dataSoal;
    private RecyclerView recyclerView;
    RadioGroup radioGroup;
    RadioButton radioButton;
    private FloatingActionButton btn;
    int nilai;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        radioGroup = findViewById(R.id.rgJawab);
        btn = findViewById(R.id.kumpulkan);
        recyclerView = findViewById(R.id.list_soal);
        recyclerView.setHasFixedSize(true);
        recyclerView.setLayoutManager(new LinearLayoutManager(this));
        dataSoal = new ArrayList<>();
        AndroidNetworking.initialize(getApplicationContext());
        getSoal();
        nilai = 0;



        btn.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                Toast.makeText(MainActivity.this, "touch", Toast.LENGTH_SHORT).show();
            }
        });

        radioGroup.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {
            @Override
            public void onCheckedChanged(RadioGroup group, int checkedId) {
                int Radioid = radioGroup.getCheckedRadioButtonId();
                radioButton = findViewById(Radioid);
                Toast.makeText(MainActivity.this, radioButton.getText() + " touch", Toast.LENGTH_SHORT).show();
            }
        });

    }


    private void getSoal(){
        dataSoal.clear();
        recyclerView.setAdapter(null);

        AndroidNetworking.get(Config.BASE_URL + "list_soal.php")
                .setPriority(Priority.MEDIUM)
                .build()
                .getAsJSONArray(new JSONArrayRequestListener() {
                    @Override
                    public void onResponse(JSONArray response) {
                        Log.d(TAG, "onResponse: " + response);

                        {
                            try {
                                for (int i = 0; i < response.length(); i++) {
                                    JSONObject data = response.getJSONObject(i);
                                    //adding the product to product list
                                    dataSoal.add(new DataSoal(
                                            data.getInt("id"),
                                            data.getString("no"),
                                            data.getString("soal"),
                                            data.getString("opsi_a"),
                                            data.getString("opsi_b"),
                                            data.getString("opsi_c"),
                                            data.getString("opsi_d"),
                                            data.getString("jawab")
                                    ));
                                }
                                ListAdapterSoal adapter = new ListAdapterSoal(MainActivity.this, dataSoal);
                                recyclerView.setAdapter(adapter);
                            } catch (JSONException e) {
                                e.printStackTrace();
                            }
                        }
                    } @Override
                    public void onError(ANError error) {
                        Log.d(TAG, "onError: " + error);
                        // handle error
                    }
                });
    }

}