Issue description

The "Change brightness" action doesn't work correctly because the minimum brightness or maximum brightness is not enough

The root cause

According to Android documentation, the "screen_brightness" Android setting must be an integer value between 0 - 255

This can be tested using ADB:

adb shell settings put system screen_brightness 0
adb shell settings put system screen_brightness 1
adb shell settings put system screen_brightness 25
adb shell settings put system screen_brightness 150
adb shell settings put system screen_brightness 255

The Android documentation is pretty easy and clear, but the documentation is not respected, and in reality, the screen_brightness range is different between Android versions and different manufacturers.

And after some feedback from users and debug, there are some exceptions and complications that are not specified anywhere:

Before Android P: screen_brightness is linear
After Android P: screen_brightness is logarithmic
Changing "screen_brightness" if Auto brightness or adaptive brightness is turned on:
- it might work on some manufacturers
- it might not work at all on others
- it might work as an relative value, not as an absolute value (to increase/decrease)
- it might work only if done in small steps with a lot of time interval between each step (5 to 10 seconds to lower the brightness to 0)
on some devices the minimum value is not 0, it is 1 and setting it to 0 will not do anything
on some devices the maximum value is not 255, it is 127, or 2047, or 4095, or who knows what
there is no official API to get the device minimum or maximum value

micku7zu / QuickCursor

"Change brightness" action doesn't set the brightness to lowest or highest value #18

Issue description

The root cause