I am looking to add controls to adjust screen brightness locally in my app menu but can't seem to figure out how to do it. I have seen examples to max-out or dim brightness but I am looking to add controls so that the user can control and set the brightness level. Does anyone have any examples, tutorials, source code, or just a place to point me in the right direction?
A:
The internet claims this works, I haven't tried it though:
WindowManager.LayoutParams lp = getWindow().getAttributes();
lp.screenBrightness = 100 / 100.0f;
getWindow().setAttributes(lp);
fiXedd
2009-11-24 23:27:16
Thank you this did in fact work for me
Cymon
2009-12-10 17:46:58
That works from an Activity...any idea how to do it from a widget? The Power Manager widget for Android 2.0 does it. I want to be able to do it from my widget.
Eclipsed4utoo
2009-12-11 19:53:58
+1
A:
This is answered by a similar question.
The only difference is that you will want to tie the screenBrightness member to the value of a user interface control.
Note that this might not work as expected on devices that have auto-dimming sensors.
Timothy Lee Russell
2009-11-24 23:42:27
+1
A:
You can change the user's brightness setting like this (make sure you declare permission for WRITE_SETTINGS in the manifest)
android.provider.Settings.System.putInt(getContentResolver(),
android.provider.Settings.System.SCREEN_BRIGHTNESS, brightpref);
The documentation calls that setting from 0 to 255. I am trying to figure out whether it shuts the screen off at 0, as at one point I had a widget installed with a slider and you'd cause the screen to shut off if you set it to 0.