Android Question a question about intercept key

[yhyzhj]

I want to intercept a key. eg:volume_up
I use these code, it work. but if press home or back, the app will exit. it cant work.

Sub Activity_keyPress (KeyCode As Int) As Boolean 'Return True to consume the event
     If KeyCode = KeyCodes.KEYCODE_VOLUME_UP Then
        ToastMessageShow("up",False)
        Return True
    End If
End Sub

how to let the app keep running on background.

 

[DonManfred]

You can not intercept HOME Key. Pressing home brings your app into background. This is how android works.

 

[agraham]

how to let the app keep running on background.

Use B4XPages.

 

[yhyzhj]

i just want to write a app, let the volume+down key be invalid after open the app
how to do? thanks

 

[drgottjr]

you already did it (your code from first post):

Sub Activity_keyPress (KeyCode As Int) As Boolean 'Return True to consume the event
     If KeyCode = KeyCodes.KEYCODE_VOLUME_UP Then
        ToastMessageShow("up",False)
        Return True
    End If
End Sub

just add a test for KeyCodes.KEYCODE_VOLUME_DOWN.
this has nothing to do with back or home keys. what's the problem?

 

[yhyzhj]

yes,i know it can work. but cant keep working when press a back key or home key. i need it work on background.when i browse web or do other thing, it still can work.

 

[Erel]

You cannot intercept such keys when your app is in the background.