Android Question [B4X] B4XPages - how to catch volume key?

stevenindon · Sep 5, 2021

Hello all,

First time using B4XPage... how can we catch the volume button in B4XPage like we used to be

My Old example :

B4X:

Sub Activity_KeyPress (KeyCode As Int) As Boolean 'Return True to consume the event
    Select Case KeyCode
        Case 4 'BACK KEY
            RaiseUserEvent("ExecReturn_Keycode_Key","BACK")
        Case 24 'VOLUME UP
            RaiseUserEvent("ExecReturn_Keycode_Key","VOLUP")
        Case 25 'VOLUME DOWN
            RaiseUserEvent("ExecReturn_Keycode_Key","VOLDOWN")
    End Select
    Return True
End Sub

I am able to catch 'back' key using Sub B4XPage_CloseRequest As ResumableSub

Erel · Sep 6, 2021

Untested code - change Activity_KeyPress in Main module to:

B4X:

Sub Activity_KeyPress (KeyCode As Int) As Boolean
    If B4XPages.Delegate.Activity_KeyPress(KeyCode) Then Return True
    B4XPages.GetManager.RaiseEvent(B4XPages.GetManager.GetTopPage, "B4XPage_KeyPress", Array(KeyCode))
    Return True
End Sub

Handle it with:

B4X:

Private Sub B4XPage_KeyPress (Keycode As Int)

End Sub

stevenindon · Sep 7, 2021

Erel,

Thanks for your reply, I did a couple of test... and here are the results :

If i put in Main : It works..

B4X:

Sub Activity_KeyPress (KeyCode As Int) As Boolean
    msgbox(KeyCode,"")
    Return B4XPages.Delegate.Activity_KeyPress(KeyCode)
End Sub

but if i put in B4XPages : It doesnt work.

B4X:

Private Sub B4XPage_KeyPress (Keycode As Int) as Boolean
    msgbox(KeyCode,"")
End Sub

Private Sub B4XPage_KeyPress (Keycode As Int) as Boolean in B4XPages event not raised.

Is there a bug.. or did i did something wrong.

agraham · Sep 7, 2021

~~You need both. The Sub in Main calls the one in the B4XPage. That is what this line does~~
~~Return B4XPages.Delegate.Activity_KeyPress(KeyCode)~~

EDIT: I didn't read your code carefully, You need both Subs exactly as written by Erel above. The one in Main calls the B4XPage_KeyPress Sub in the top page by

B4XPages.GetManager.RaiseEvent(B4XPages.GetManager.GetTopPage, "B4XPage_KeyPress", Array(KeyCode))

stevenindon · Sep 8, 2021

agraham,

Thanks for pointing out to me. Yep tested Erel codes and works as expected. Thanks Erel and agraham.

Android Question [B4X] B4XPages - how to catch volume key?

stevenindon

Active Member

Erel

B4X founder

stevenindon

Active Member

agraham

Expert

stevenindon

Active Member

Similar Threads

Android Question [B4X] B4XPages - how to catch volume key?

stevenindon

Active Member

Erel

B4X founder

stevenindon

Active Member

agraham

Expert

stevenindon

Active Member

Similar Threads

Privacy & Transparency

Privacy & Transparency