Question

I’m wondering what “context” stands for in this code, and what shall I insert to make it work? (Code to dim the screen)

Settings.System.putInt(context.getContentResolver(), 
                         Settings.System.SCREEN_BRIGHTNESS, someIntValue);

Answer 1

If you are doing this from Activity or Service:

Settings.System.putInt(this.getContentResolver(), Settings.System.SCREEN_BRIGHTNESS, someIntValue);

That’s because both Activity and Service are inherited from Context class and can be used as context value. You can make this even more explicit (still assuming this is class inherited from Activity or Service):

Context context = this;
Settings.System.putInt(context.getContentResolver(), Settings.System.SCREEN_BRIGHTNESS, someIntValue);