Why rating bar's onRatingBarChangeListner dose not work?

I am trying to add

in my code. I am using to get the values of rating bar. But is not responding at all. It dose not get selected or change color.

public class SurveyActivity extends AppCompatActivity implements getQuestionsAsyncTask.GetQuestions,RatingBar.OnRatingBarChangeListener{



private ArrayList<Question> mQuestionsArrayList;

private TextView mTextQuestion1,mTextQuestion2;

private RatingBar ratingbar1;





@Override

protected void onCreate(Bundle savedInstanceState) {

    super.onCreate(savedInstanceState);

    setContentView(R.layout.activity_survey);



 //   addListenerOnButtonClick();



    mTextQuestion1 = (TextView)findViewById(R.id.textQuestion1);

    mTextQuestion2 = (TextView)findViewById(R.id.textQuestion2);



    Button next = (Button)findViewById(R.id.btn_next);



    final RatingBar ratingBar = (RatingBar)findViewById(R.id.MyRating);



   next.setOnClickListener(new View.OnClickListener() {

        @Override

        public void onClick(View view) {

            float rating=ratingBar.getRating();

            Toast.makeText(getApplicationContext(),"Your Selected Ratings  : " + String.valueOf(rating),Toast.LENGTH_LONG).show();



         //   startActivity(new Intent(SurveyActivity.this,UserDetailsActivity.class));

        }

    });







    mQuestionsArrayList = new ArrayList<>();



    getQuestionsAsyncTask getQuestionsAsyncTask = new getQuestionsAsyncTask(this,this,mQuestionsArrayList);

    getQuestionsAsyncTask.execute();

}

public void onRatingChanged(RatingBar ratingBar, float rating,

                            boolean fromUser) {



    Toast.makeText(getApplicationContext(),"Your Selected Ratings  : " + String.valueOf(rating),Toast.LENGTH_LONG).show();



}

Tried this but dose not work.

    <RatingBar

        android:id="@+id/MyRating"

        style="?android:attr/ratingBarStyleSmall"

        android:layout_width="wrap_content"

        android:layout_height="wrap_content"

        android:isIndicator="true"

        android:numStars="5"

        android:stepSize="0.1"

        android:layout_above="@+id/textQuestion2"

        android:layout_alignParentEnd="true"

        android:layout_marginLeft="10dp"

        android:layout_marginStart="10dp"

        android:layout_alignParentRight="true" />

Also tried this tutorial

What's going wrong? Can anyone help please? Thank you..

EDIT: Tried both the answers still it's not working:

public class SurveyActivity extends AppCompatActivity implements getQuestionsAsyncTask.GetQuestions,RatingBar.OnRatingBarChangeListener{



    private ArrayList<Question> mQuestionsArrayList;

    private TextView mTextQuestion1,mTextQuestion2;

    private RatingBar ratingbar1;





    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_survey);



        Button next = (Button)findViewById(R.id.btn_next);



        final RatingBar ratingBar = (RatingBar)findViewById(R.id.MyRating);

        ratingBar.setOnRatingBarChangeListener(this);





       next.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View view) {

                float rating=ratingBar.getRating();

                Toast.makeText(getApplicationContext(),"Your Selected Ratings  : " + String.valueOf(rating),Toast.LENGTH_LONG).show();



            }

        });

    }

    @Override

    public void onRatingChanged(RatingBar ratingBar, float v, boolean b) {



            v = ratingBar.getRating();



            Toast.makeText(getApplicationContext(), "Your Selected Ratings  : " + String.valueOf(v), Toast.LENGTH_LONG).show();



    }