Adjust Brightness in Android Programatically

[vivekkalady]

First Method

This Method is used to increase brightness of the current window

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WindowManager.LayoutParams lp = getWindow().getAttributes(); 
                 lp.screenBrightness = 75 / 100.0f; 
                 getWindow().setAttributes(lp);

where the brightness value very according to 1.0f.100f is maximum brightness.

Second Method

This increases the Brightness of the Android Device (not the windows only as in first method)

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android.provider.Settings.System.putInt(getContentResolver(),
                         android.provider.Settings.System.SCREEN_BRIGHTNESS, 192);

Where 192 is the brightness value which very from 1 to 255. The main problem of using 2nd method is it will show the brightness in increased form in android device but actually it will fail to increase android device brightness.This is because it need some refreshing.


We can combine them both

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WindowManager.LayoutParams lp = getWindow().getAttributes(); 
lp.screenBrightness = 75 / 100.0f; 
getWindow().setAttributes(lp); 
android.provider.Settings.System.putInt(getContentResolver(),android.provider.Settings.System.SCREEN_BRIGHTNESS, 192);


you need permission also for applying system level setting

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<uses-permission android:name="android.permission.WRITE_SETTINGS"></uses-permission>