Radio Button Activity

package info.rekayasa.radiobutton;

import android.app.Activity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.RadioButton;
import android.widget.RadioGroup;
import android.widget.Toast;


public class MainActivity extends Activity {

    RadioGroup rgJenis;
    RadioButton rbJenisLk, rbJenisPr;
    Button btnCek;

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

        rgJenis = (RadioGroup) findViewById(R.id.rgJenis);
        rbJenisLk = (RadioButton) findViewById(R.id.rbJenisLk);
        rbJenisPr = (RadioButton) findViewById(R.id.rbJenisPr);
        btnCek = (Button) findViewById(R.id.btnCek);

        btnCek.setOnClickListener(new OnClickListener() {

            @Override
            public void onClick(View v) {
                int selectedId = rgJenis.getCheckedRadioButtonId();
                if(selectedId==rbJenisLk.getId()){
                    String jenis = rbJenisLk.getText().toString();
                    Toast.makeText(getApplicationContext(), jenis, Toast.LENGTH_LONG).show();
                } else {
                    String jenis = rbJenisPr.getText().toString();
                    Toast.makeText(getApplicationContext(), jenis, Toast.LENGTH_LONG).show();
                }
            }
        });
    }
}