public class MainActivity extends AppCompatActivity {
 private RatingBar rb_normal;
 @Override
 protected void onCreate(Bundle savedInstanceState) {
  super.onCreate(savedInstanceState);
  setContentView(R.layout.activity_main);
  rb_normal = (RatingBar) findViewById(R.id.rb_normal);
  rb_normal.setOnRatingBarChangeListener(new RatingBar.OnRatingBarChangeListener() {
   @Override
   public void onRatingChanged(RatingBar ratingBar, float rating, boolean fromUser) {
    Toast.makeText(MainActivity.this, "rating:" + String.valueOf(rating),
      Toast.LENGTH_LONG).show();
   }
  });
 }
}

<?xml version="1.0" encoding="utf-8"?>
<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
 <item android:id="@android:id/background"
  android:drawable="@mipmap/ic_rating_off1" />
 <item android:id="@android:id/secondaryProgress"
  android:drawable="@mipmap/ic_rating_off1" />
 <item android:id="@android:id/progress"
  android:drawable="@mipmap/ic_rating_on1" />
</layer-list> 

<style name="roomRatingBar" parent="@android:style/Widget.RatingBar">
  <item name="android:progressDrawable">@drawable/ratingbar_full</item>
  <item name="android:minHeight">24dip</item>
  <item name="android:maxHeight">24dip</item>
 </style>

<RatingBar
  android:id="@+id/rb_normal"
  style="@style/roomRatingBar"
  android:layout_width="wrap_content"
  android:layout_height="wrap_content" />