RatingBar Android can be used to obtain a rating from the user.
Rating restore float number.
Maybe 2.0, 3.5, 4.0 etc .. Methods getRating () on Rating android Bar class returns a value rating.
Application examples in class java.
RatingBar rb=(RatingBar)findViewById(R.id.ratingBy); String rating=String.valueOf(rb.getRating());
Use RatingBar to ask rate app users, content, your design.
Source: Master Android (App)