Step 1 :

Put below code in your layout file :
<RatingBar android:id=”@+id/ratingBar” android:layout_width=”wrap_content” android:layout_height=”wrap_content” android:layout_gravity=”center” android:numStars=”5″ android:progressTint=”@android:color/holo_orange_light” android:layout_marginTop=”10dp” android:stepSize=”1.0″ android:rating=”0″ />
here define the components which we are used :
ratingBar – id of RatinBar Component.
numStars – how many starts which you show for rating
progressTint – Color of starts when we select for rating.
stepSize – when we click one time how may count we measure.
rating – initial rating which we show on rating bar.
When we are using this RatingBar in Activity class so following methods are useful.
setRating – for any rating.

getRating – get the current rating from the RatingBar.