Getting if Screen ON/OFF and if Application is in Background/Foreground

Question

I decided to post two question in one post, because it's quite same problem.

I need to know when screen is ON or OFF so i can turn LED. The second one I need to know if my applicaiton is in backgorund or it is in foreground, to manage sending notification on some actiong when app is in background.

Jorge Fuentes González · Answer 1 · 2015-03-12T15:09:38.387

13

Adding answer for screen ON/OFF check:

// If you use API20 or more:
DisplayManager dm = (DisplayManager) context.getSystemService(Context.DISPLAY_SERVICE);
for (Display display : dm.getDisplays()) {
    if (display.getState() != Display.STATE_OFF) {
        return true;
    }
}
return false;

// If you use less than API20:
PowerManager powerManager = (PowerManager) getSystemService(POWER_SERVICE);
if (powerManager.isScreenOn()){ return true; }

Note that Display.getState() can also return STATE_DOZE and STATE_DOZE_SUSPEND which means that the screen is on in an special way. More info on Display.getState() and his return values here: http://developer.android.com/reference/android/view/Display.html#getState()

Also note that although official documentation recommends using isInteractive() instead of isScreenOn(), if you really want to know the status of the screen, Display.getState() is a better option because of the 'special' conditions that sets the screen on while the device is not interactive.

edited Mar 12 '15 at 15:09

answered Jun 27 '13 at 16:41

Jorge Fuentes González

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the official documentation says `Note in particular that the device is still considered to be interactive while dreaming`. I found http://stackoverflow.com/a/28747907/1115059 to be more accurate and updated – Jaydeep Solanki Mar 12 '15 at 12:57
@Jaydeep Hmmm, interesting. Going to update the answer. Thank you! – Jorge Fuentes González Mar 12 '15 at 14:56
how to use getState() method in the background suppose when display goes off need to to some work in background .(ACTION_SCREEN_OFF deal with is user interactive or not but not with display on/off). any idea? Thanks – Milon Dec 07 '15 at 06:34

score 2 · Accepted Answer · edited May 23 '17 at 11:48

2

There have been similar questions on Stackoverflow earlier. Here are links to a few of them:

edited May 23 '17 at 11:48

Community

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answered Jun 10 '11 at 11:19

Ozair Kafray

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score 2 · Answer 3 · answered Jun 10 '11 at 11:20

You can know if you're in the foreground or not through use of your activity's onWindowFocusChanged() callback; see http://developer.android.com/reference/android/view/Window.Callback.html

You can also create a broadcast receiver to capture SCREEN_ON and SCREEN_OFF events. Here is an example.

Getting if Screen ON/OFF and if Application is in Background/Foreground

3 Answers3