I knew that brightness seekbars go from 0 to 100, and screen brightness goes from 0 to 255. But I just found out that some devices (maybe most) don't change from seekbar value to real value linearly but more like exponentially.
For example on the Razer Phone 2 when the seekbar is set to 3% the brightness is set to 3. And when the seekbar is set to 100% the brightness is set to 255.
To make a brightness app I'd have to figure out the equation to use to transform from seekbar value to brightness, and that's just for this device. I have no idea what equation other devices use.
This problem can be overcome by making a seekbar with values from 0 to 255. But I guess choosing precise values from such a seekbar would be very difficult, even for a user with tiny fingers, which is why Android has always used brightness seekbars with Max values of 100.
My questions are:
1-Is the way seekbar translates to brightness dependant on API version? Or is it specific to each and every device and therefore hopeless?
2-If it's dependant on API version then is there an existing way I can translate seekbar to brightness?
Also sorry to pile up the questions but I read somewhere that your app can't detect brightness level if auto-brightness is enabled. Is this true? I can't try it on Android Studio emulator since devices there don't have auto-brightness. But I did try it on my Razer Phone 2 and the app was able to detect brightness level when auto-brightness is enabled.
