How to set progressDrawable to a RatingBar dynamically using LayerDrawable

Question

I want to set progressDrawable to a RatingBar. I was able to do this using (layer-list) via xml. Here is my layout ....

<RatingBar
   android:layout_width="wrap_content"
   android:layout_height="wrap_content" 
   android:stepSize="0.5"
   android:rating="3.0"
   android:id="@+id/ratingbar_default"
   android:progressDrawable="@drawable/star_rating_bar_full"
   />

Here is my star_rating_bar_full

where star2 and star1 are images for specifying rated star and unrated star.

The output was fine and the RatingBar looked great. I was able to rate also. Now i want to apply the same logic dynamically using LayerDrawable

I have tried to use the following answer Dynamic RatingBar. I was able to display the RatingBar but the edges were cut at the right side of Rating Bar. The functionality was working fine but this is the only problem i am facing.

Any ideas ??? Why the rating bar edges has been cut of at right side.