What is a step size in a RatingBar? This is what I found in the documentation: The step size of this rating bar. For example, if half-star granularity is wanted, this would be 0.5. I tried to find it over here: https://developer.android.com/reference/android/widget/RatingBar.html. So can anyone explain it more simply so that I understand, please?
Its nothing but a factor by which you increase ratings on RatingBar. If you want ratings to be displayed like 3.5 or 4.5, you can use stepSize as 0.5. Incase, you want ratings like 3.1 or 4.3, you can have stepSize like 0.1.
Inshort,
stepSize = 1, Ratings = 0, 1, 2, 3, 4, 5, ...
stepSize = 0.1, Ratings = 0.0, 0.1, 0.2, ..., 1.0, ..., 2.0, ..., 5.0, ...
stepSize = 0.5, Ratings = 0.0, 0.5, 1.0, 1.5, 2.0, ..., 5.0, ...
This takes a float value which is the step size of rate increase/decrease. For example, if we set step size to 1.0 then the rating values will be increased/decreased by 1 the less the stepSize, the more presice the rating will be.
0.5 stepsize ------- 4.05,3.15,0.05 (ratings)
0.1 stepsize ------- 1.00,2.00,3.00 (ratings)
0.7 stepsize ------- 1.07,2.14,3.21 (ratings)
来源：https://stackoverflow.com/questions/43735949/step-size-in-ratingbar