How android LED enabled during use of the app?

Question

Requirement：

The LED lights up and displays a color during the use of the app.

Can the Notification LED be displayed only in the off state?

Is there a way to enable LEDs when using the app?

Or does Android have other APIs to control LED lights?

My app is registered in manifest.

    android:sharedUserId="android.uid.system"

Some [useful info here](https://stackoverflow.com/questions/48746303/controling-androids-front-led-light). — Benoit, Mar 13 '19 at 09:06
Can the Notification API enable the LED when the screen is turned on? I tried it. But failed. — HE XUAN-WEI, Mar 13 '19 at 09:21

score 1 · Answer 1 · answered Mar 13 '19 at 09:00

1

Nope, without Root the LED cannot be directly managed.

Using Root it should be possibile via "/dev/input/event..." interrogation.

answered Mar 13 '19 at 09:00

emandt

My app is registered in manifest. android:sharedUserId="android.uid.system" Can the Notification API enable the LED when the screen is turned on? – HE XUAN-WEI Mar 13 '19 at 09:17
When the screen is turned on it's NOT possibile to change LED status/color using normal Android API. Maybe via Reflection but I never tried and neither know what variable/class to use using reflection. The only available way is access hardware directly from "/dev/input/event..." but it requires Root. – emandt Mar 13 '19 at 10:26

1 Answers1