Android tutorial to change screen brightness

Android tutorial to change screen brightness

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This post will explain how to change the current system brightness with a SeekBar 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

This is a full blown android application tutorial which shows how to use the seekbar to change the brightness of the device when user increases or decreases the progress bar value. Many such apps have been uploaded to play store.The source code is available at: http://www.indragni.com/android/SetScreenBrightness.zip
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Android tutorial to change screen brightness