Posts Tagged ‘Screen’

Android: changing the screen brightness

Click here to read Android: changing the screen brightness

This post will explain how to change the current system brightness with a seek bar GUI on Android devices. The code here featured only works on real devices, because it is not possible to see brightness changes on the emulator. Also, all the code explained here is available for download at the end of this post.

The first thing one must know is that Android system brightness value is applied to the screen’s backlight only when the screen turns on. This means that only after a boot up or awaking the phone from a sleeping state will make the screen as bright as the value defined by the System.SCREEN_BRIGHTNESS variable. Consequently, changing only that variable won’t be enough to preview the brightness level.


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