Android Development: Changing Screen Brightness in Service

Question

Now i do try again.

I want to change the screen brightness.

I've Tried:

WindowManager.LayoutParams layoutParams = getWindow().getAttributes();
layoutParams.screenBrightness = 0.5F; // set 50% brightness
getWindow().setAttributes(layoutParams);

and seems to work in activity but when I am in service i get that getWindow() compile error.

score 5 · Accepted Answer · answered Jul 03 '11 at 20:41

5

A service cannot change the screen brightness that way. A service does not have a user interface, so it does not have Window.

You can try to change the brightness system-wide via the SCREEN_BRIGHTNESS system setting. I have no idea if this works, as I have not tried it.

Otherwise, modify your activities to change their brightness.

answered Jul 03 '11 at 20:41

CommonsWare

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But my service checks like every 10min how do i make the service trigger another class? – carefacerz Jul 03 '11 at 21:22
@carefacerz: What possible purpose do you have for "checks like every 10min" for screen brightness? – CommonsWare Jul 03 '11 at 22:07

score 0 · Answer 2 · edited May 23 '17 at 11:58

You would need to start an activity from your service, all you need to do is this:

Intent myIntent = new Intent(getBaseContext(), MyActivity.class);
getApplication().startActivity(myIntent);

where MyActivity is the activity which you want to start. Inside that activity you can put code to change the window brightness, it will work.

I've included the complete code here: https://stackoverflow.com/a/9848456/1204377

Let me know if it's still unclear.

Android Development: Changing Screen Brightness in Service

2 Answers2

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