Kviz in progress

package rajak.igre.kviz;

import java.util.ArrayList;

import rajak.igre.kviz.model.Pitanje;
import android.app.Activity;
import android.app.ActionBar;
import android.app.Fragment;
import android.os.Bundle;
import android.view.LayoutInflater;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.ViewGroup;
import android.widget.RadioButton;
import android.widget.TextView;
import android.os.Build;

public class MainActivity extends Activity {



    private int trenutnoPitanje;
    private int score;
    private ArrayList<Pitanje> pitanja;

    // reference na elemente interfejsa
    private RadioButton rbtnA;
    private RadioButton rbtnB;
    private RadioButton rbtnC;
    private TextView txtPitanje;




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

        trenutnoPitanje = 0;
        score = 0;

        rbtnA = (RadioButton) findViewById(R.id.rbtnOpcijaA);
        rbtnB = (RadioButton) findViewById(R.id.rbtnOpcijaB);
        rbtnC = (RadioButton) findViewById(R.id.rbtnOpcijaC);
        txtPitanje = (TextView) findViewById(R.id.txtPitanje);

        pitanja = new ArrayList<Pitanje>();
        pitanja.add(new Pitanje("Koje boje je nebo?", "Plavo", "Zuto", "Zeleno","Plavo"));
        pitanja.add(new Pitanje("Da li je Android Linux?", "Ne", "Da", "Samo koristi Kernel njegov","Samo koristi"
                + "Kernel njegov"));
        pitanja.add(new Pitanje("Koliko je 2 +2", "4", "2", "9", "4"));
        pitanja.add(new Pitanje("Koje boje je Android maskota", "Zelene", "Plave", "Crvene","Zelene"));
        pitanja.add(new Pitanje(""?", "Plavo", "Zuto", "Zeleno","Plavo"));





    }


    @Override
    public boolean onCreateOptionsMenu(Menu menu) {

        // Inflate the menu; this adds items to the action bar if it is present.
        getMenuInflater().inflate(R.menu.main, menu);
        return true;
    }

    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        // Handle action bar item clicks here. The action bar will
        // automatically handle clicks on the Home/Up button, so long
        // as you specify a parent activity in AndroidManifest.xml.
        int id = item.getItemId();
        if (id == R.id.action_settings) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }

    /**
     * A placeholder fragment containing a simple view.
     */
    public static class PlaceholderFragment extends Fragment {

        public PlaceholderFragment() {
        }

        @Override
        public View onCreateView(LayoutInflater inflater, ViewGroup container,
                Bundle savedInstanceState) {
            View rootView = inflater.inflate(R.layout.fragment_main, container, false);
            return rootView;
        }
    }

}