setProgressBackgroundTintList
Applies a tint to the progress background, if one exists. Does not modify the current tint mode, which is SRC_ATOP by default.
The progress background must be specified as a layer with id background in a LayerDrawable used as the progress drawable.
Subsequent calls to setProgressDrawable where the drawable contains a progress background will automatically mutate the drawable and apply the specified tint and tint mode using setTintList.
Parameters
tint
the tint to apply, may be null
to clear tint