Turn off light after 30 second of inactivity

Question

My app is set LCD always on but it loses too much power, I want to dim or turn off LCD light(no sleep or lock) after 50 seconds of inactivity.

I tried some solutions but no one cant cures my problem.

I just want it on one activity, not others.

Please help me with any class or method that I can use for this

Edited:

My main problem:

I want to use hard key of an android device when it locked.

So now tell me,How can i use a hard key as a click in my app when screen locked???

Edit:

i have a device with 5 hard key and i want use them when device locked down.

_Hey mate plese update your question with code and more information_ — Kaushik Burkule, Oct 14 '19 at 08:35
check this answer https://stackoverflow.com/a/36001592/7360848 — touhid udoy, Oct 14 '19 at 08:44
this answer is good, but android dont let us use that permission anymore .so that answer cant help me — alireza daryani, Oct 14 '19 at 08:59

mumayank · Accepted Answer · 2019-10-15T09:18:57.187

4

Keeping the screen on forever is as simple as creating a wakeLock. Turning off the screen after sometimes (probably 30 seconds or so) will be enabled by default in almost all the Android devices.

I think what you are looking for here is an app that behaves like a media player app/ music playing app. You can do so by running a service in the foreground. You will need to create a persistent notification for this. This way, your app/ activity will not get killed even if the device screen is off.

Find the documentation here: https://developer.android.com/guide/components/services#Foreground

EDIT #1 As discussed in the comments, this link was helpful to the OP for getting the answer to his query: https://stackoverflow.com/a/29818026/3811983

edited Oct 15 '19 at 09:18

answered Oct 14 '19 at 09:36

mumayank

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thanks for your answer , but i already use foreground service and unkillable notification. now i want use buttons for app when android locked.it is my main problem. – alireza daryani Oct 14 '19 at 12:18
Sorry, I am unable to understand what do you mean by 'buttons for app'? – mumayank Oct 15 '19 at 04:29
I have a device with 3 Hard key that i want use them when device go to sleep... – alireza daryani Oct 15 '19 at 05:15
Understood. I'm looking for an answer for you. In the meanwhile, I request you to kindly upvote my answer so that it encourages me to help you. Thanks in advance. – mumayank Oct 15 '19 at 05:20
I appreciate you, but i cant do it because i need 15 reputation for doing this, help me with this issue and i will accept your answer. – alireza daryani Oct 15 '19 at 06:24
Okay, is this helpful: https://stackoverflow.com/a/29818026/3811983 – mumayank Oct 15 '19 at 06:53
YES MAN, its work for me. Thanks alot – alireza daryani Oct 15 '19 at 08:47
You're welcome, glad I could be of your help :) Thanks for marking it as the right answer. I'll edit it to include the link. – mumayank Oct 15 '19 at 09:17

Turn off light after 30 second of inactivity

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