Android Question How to disable "back key"?

[vecino]

Hi, How to disable "back key" while showing a "spinner"?

In the "activity" I have in activity_KeyPress, but does not work when making a request for data to the user using a "spinner".

Thanks and regards.

 

[Jim Brown]

See if this is helps:

Sub Activity_KeyPress (key As Int) As Boolean
    ' BACK key pressed
    If key=KeyCodes.KEYCODE_BACK Then
            ' I want to capture the key here so I return True
            Return True
    End If
    ' Returning False signals the system to handle the key
    Return False
End Sub

 

[vecino]

Hi, thanks, works perfect, I have this code, but the problem is when I show a "spinner", then the user can press the "back" and not to choose any of the options. In other words, this code does not work when you are displaying a "spinner".

Thanks and regards.

 

[NJDude]

I don't think that's possible, since it has to be a way to "cancel" selecting something from the spinner.

 

[eps]

Hi, thanks, works perfect, I have this code, but the problem is when I show a "spinner", then the user can press the "back" and not to choose any of the options. In other words, this code does not work when you are displaying a "spinner".

Thanks and regards.

?

Are you saying that Keypress doesn't execute when the User presses the Back Button when they've selected the Spinner? Some Event must get fired...?

 

[vecino]

Some Event must get fired...?

That's sure to be that way, but what event will be?

 

[eps]

Have you traced the code?

 

[vecino]

Have you traced the code?

Yes, and the code does not reach to "activity_KeyPress"

 

[Erel]

The spinner handles the keypress itself. It doesn't reach the activity listener.

Maybe you need to use a modal dialog instead (such as InputList). It will return DialogResponse.Cancel if the user presses on the back key.

 

[vecino]

Hello, I tested with inputlist and the problem is the same because it is a not modal dialog
Regards.

 

[vecino]

I mean that behaves like the "spinner"

 

[Erel]

InputList is a modal dialog. Do you want to show a non-modal dialog?

 

[vecino]

Hi, what I want is that the user can not press "back key" while showing you a spinner or any other type of "view" data request.
Thank you.

 

[Erel]

You cannot globally disable the back key.

 

[vecino]

But can while displaying a dialogue with "spinner", "InputList" etc..?

 

[Erel]

No. The Spinner internally handles the key. This is also the standard behavior which the user expects. If you show a modal dialog such as InputList you can show it again if Cancel was pressed (or back key).

 

[vecino]

Hi, thank you all.
Let's see how I manage.
Greetings.

 

[vecino]

Hi, I wonder is it possible to disable or remove the entire set of keys?

thanks

 

[NJDude]

The soft keys cannot be disabled or removed, in recent versions of Android can be "hidden" but that's about it.

 

[vecino]

Thank you.