Android Question How to Intercept volume button press when screen off

Albert Lin · Oct 13, 2016

Dear all

I would like to run some function after press volume button while screen off.
Could anyone be kind to guide me how to do that? Thanks in advance.

Best Regards
Albert Lin

Erel · Oct 13, 2016

You can try to intercept the VOLUME_CHANGED event: https://www.b4x.com/android/forum/threads/intercept-volume-button-press.28179/#post-163378

It will probably not fire when the screen is off.

Albert Lin · Oct 13, 2016

Erel said:
You can try to intercept the VOLUME_CHANGED event: https://www.b4x.com/android/forum/threads/intercept-volume-button-press.28179/#post-163378

It will probably not fire when the screen is off.

Is there any way to make it fire when the screen off?

Erel · Oct 13, 2016

Did you try it?

Albert Lin · Oct 13, 2016

Erel said:
Did you try it?

I did try, but it didn't fire.

Erel · Oct 13, 2016

Check this answer: http://stackoverflow.com/a/15841187/971547

Albert Lin · Oct 13, 2016

Erel said:
Check this answer: http://stackoverflow.com/a/15841187/971547

Thank you very much for the suggestion

Albert Lin · Oct 14, 2016

Erel said:
Check this answer: http://stackoverflow.com/a/15841187/971547

Dear Erel

It does work. Thanks.

B4X:

Sub BR_OnReceive(Action As String, Extras As Object)
                                                    
    gVibrate.Vibrate (390)
      ToastMessageShow(Action,False)
    
End Sub

but from the "Action" parameter, I couldn't know which key is pressed. How to know Volume_up or Volume_down is pressed?

sirjo66 · May 28, 2017

Erel said:
Check this answer: http://stackoverflow.com/a/15841187/971547

I'm sorry to re-open this old thread but I have the same problem and I don't understand what is the right way.

In the link above I don't find the solution, I find "... because broadcast receiver not work when screen light off ...", so I don't understand if it works or not when screen is off

Are you using BroadcastReceiver library ??
Do it works also when screen is off ??
Can you post a little code ??

Many thanks
Sergio

Erel · May 29, 2017

It will not work when the screen is off.

sirjo66 · May 29, 2017

Is there a solution ??

Erel · May 29, 2017

It might be possible with a process that is running in the background all the time.

Android Question How to Intercept volume button press when screen off

Albert Lin

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