KEYCODE_BACK don't close activity

[XverhelstX]

Heey there,

yet another question.

How do you keep your activity alive when you press the back button?
Sub Activity_KeyPress (KeyCode As Int) As Boolean

If Keycode = KeyCodes.KEYCODE_BACK Then
//don't stop activity.
End If


End Sub

Thanks!

XverhelstX

 

[kickaha]

You need to "consume" the event

Sub Activity_KeyPress (KeyCode As Int) As Boolean 'return true if you want to consume the event
   If KeyCode = KeyCodes.KEYCODE_BACK Then Return True
End Sub

 

[TomK]

This is how I would do it

Sub Activity_KeyPress (KeyCode As Int) As Boolean 'return true if you want to consume the event
   Dim result As Int
   Dim bp As Bitmap
   bp.Initialize(File.DirAssets, "index.jpg")
   
   If KeyCode = 4 Then
      result = Msgbox2("Back hit, exit are you sure?", "App Title", "Yes", "Cancel", "No", bp)
      
      Select result
         Case -1 ' yes hit ie., exit the app
            Return False
         Case -3 ' cancel hit, do nothing really, and leave the app running
            Return True ' which consumes the event and doesnt exit
         Case Else
            Return True ' also does not exit because it consumes event
      End Select
            
   End If
End Sub

 

[kickaha]

This is how I would do it

Sub Activity_KeyPress (KeyCode As Int) As Boolean 'return true if you want to consume the event
   Dim result As Int
   Dim bp As Bitmap
   bp.Initialize(File.DirAssets, "index.jpg")
   
   If KeyCode = 4 Then
      result = Msgbox2("Back hit, exit are you sure?", "App Title", "Yes", "Cancel", "No", bp)
      
      Select result
         Case -1 ' yes hit ie., exit the app
            Return False
         Case -3 ' cancel hit, do nothing really, and leave the app running
            Return True ' which consumes the event and doesnt exit
         Case Else
            Return True ' also does not exit because it consumes event
      End Select
            
   End If
End Sub

Bit of a sledgehammer to crack a nut, it is simpler:

Sub Activity_KeyPress (KeyCode As Int) As Boolean 'return true if you want to consume the event
   Dim result As Int
   Dim bp As Bitmap
   bp.Initialize(File.DirAssets, "index.jpg")
   
   If KeyCode = 4 Then
      result = Msgbox2("Back hit, exit are you sure?", "App Title", "Yes", "Cancel", "No", bp)
      If result = -1 Then' yes hit ie., exit the app
         Return False
      Else
         Return True ' which consumes the event and doesnt exit
      End If            
   End If
End Sub

I would also remove the "Cancel" button from the MsgBox

 

[TomK]

Indeed!

I grew up with lots of sledgehammers haha

 

[XverhelstX]

Ok, thanks a lot guys!

Also how can you do when I press the back button, it doesnt closethe activity
But you interpret like the home button?

XverhelstX

 

[Erel]

It is not possible to consume the Home button. This is a "feature" of android to allow the user to exit any application.