Android Question not responding to cr sent from scanner

[simon w]

Hi,
i hope this a simple question.
i have a simple app with 2 labels,2 textboxes , 6 buttons and 1 listview.
the data entered into the textboxes comes from a scanner with a <cr> at the end. from box 1 to box to jumps correctly. in order to have it go to first texbox. at the second box i added
Sub txtLocation_EnterPressed
txtPart.RequestFocus
End Sub
however the focus does not change.
shouldn't the EnterPressed pickup the <CR> sent from scanner?
what am i doing wrong?
thanks in advance
Simon

 

[stevel05]

It would make sense that the EnterPressed is only fired when the Enter button is pressed on the keyboard. So if you are amending the content by code the event will never fire.
After a test it appears that the TextChanged event also only responds to keyboard entry.

Can't you parse the incoming data and add it to the correct EditText?

 

[simon w]

It would make sense that the EnterPressed is only fired when the Enter button is pressed on the keyboard. So if you are amending the content by code the event will never fire.
After a test it appears that the TextChanged event also only responds to keyboard entry.

Can't you parse the incoming data and add it to the correct EditText?

Thanks for your response!
the data is coming from a bar code scanner not from code. i would have to trap all incoming data.
i am somewhat confused. from first text box to second text box. it understands that a <cr> was entered.
why doesn't it recognize it when i want to trap it? can it be a timing issue?can it be that it already moved out of focus before trap ?
thanks again for your input.
Simon

 

[stevel05]

How are you sending the incoming data to the first Edittext?

 

[simon w]

How are you sending the incoming data to the first Edittext?

i"m using a Bluetooth bar-code scanner. it in essence acts like it was entered at the keyboard.

 

[stevel05]

Ah OK, then I'm not going to be able to help. I've not used a Bar-code scanner. Hopefully someone will have solved this and let you know.

 

[simon w]

i"m using a Bluetooth bar-code scanner. it in essence acts like it was entered at the keyboard.

i did some further testing. i ran it in debug mode and it does trap it. i think the issue is that it returns to caller which is the text box and keeps it's focus.

in other words:

Sub txtLocation_EnterPressed
txtPart.RequestFocus
End Sub

this gets invoked , just the RequestFocus doesn't.

any ideas?

thanks again

 

[stevel05]

You could try using callsubdelayed to call a sub that requests the focus. It is not always possible to do some of these things in a callback sub.

 

[simon w]

You could try using callsubdelayed to call a sub that requests the focus. It is not always possible to do some of these things in a callback sub.

I"m not sure of the syntax. how would i use callsubdelayed with txtPart.RequestFocus
Thanks

 

[stevel05]

You would have to set a sub:

Private Sub RequestFocus
      txtPart.RequestFocus 
End Sub

Then in the callback:

CallSubDelayed(Me,"RequestFocus")

Or similar

 

[simon w]

You would have to set a sub:

Private Sub RequestFocus
      txtPart.RequestFocus
End Sub

Then in the callback:

CallSubDelayed(Me,"RequestFocus")

Or similar

thanks again . will try

 

[simon w]

thanks again . will try

Gave it a try it worked every third or fourth time. is there a time option?

 

[stevel05]

You can try CAllSubPlus, you'll need to download the class if you haven't already got it. https://www.b4x.com/android/forum/threads/b4x-callsubplus-callsub-with-explicit-delay.60877/