Android Question Spinner options

AHilberink · Sep 23, 2014

Hi,

Is it possible to use a spinner with two values? The visible value and a selected value?

As far as I could see there is only the possibility to get the selected index.

Best regards,
André Hilberink

barx · Sep 23, 2014

No you would have to keep a map for the key/value pairs and reference that.

warwound · Sep 23, 2014

You can do as you wish, take a look at my custom Adaptor: http://www.b4x.com/android/forum/threads/spinner-change-adapter.40533/#post-243179

barx · Sep 23, 2014

I stand corrected, my bad.

Disclaimer in signature......

DonManfred · Sep 23, 2014

barx said:
Disclaimer in signature......

The Airview-Library für B4a is your Disclaimer?

barx · Sep 23, 2014

no no no no
that first line of my sig states

Don't take my answers as gospel, I'm usually wrong...

AHilberink · Sep 24, 2014

Thanks everyone for your answers.

As it seems to have the need of two objects for every spinner, I just choose to define a List for every Spinner and load these synchrome.
Now I can call the value by the Get function of the List object.

I hoped there was an easy way :-(

Best regards,
André

DonManfred · Sep 24, 2014

Show your code to fill a listview with the contents of a LIST. I´ll show you how to change this to use a map for saving one or more Values which can be read on an item click event...

AHilberink · Sep 24, 2014

DonManfred said:
Show your code to fill a listview with the contents of a LIST. I´ll show you how to change this to use a map for saving one or more Values which can be read on an item click event...

Thanks DonManfred.

I will post my code.

AHilberink · Sep 24, 2014

B4X:

Sub Globals
'These global variables will be redeclared each time the activity is created.
'These variables can only be accessed from this module.

Dim Spinner1 As Spinner
Dim SpinList1 As List

Dim SelectedID As String
End Sub

Sub Activity_Create(FirstTime As Boolean)
'Do not forget to load the layout file created with the visual designer. For example:
'Activity.LoadLayout("Layout1")

Activity.LoadLayout("Main")

SpinList1.Initialize
Spinner1.AddAll(Array As String("Text1","Text2","Text3","Text4"))
SpinList1.AddAll(Array As String("ID1","ID2","ID3","ID4"))
End Sub

Sub Activity_Resume

End Sub

Sub Activity_Pause (UserClosed As Boolean)

End Sub

Sub Spinner1_ItemClick (Position As Int, Value As Object)
SelectedID = SpinList1.Get(Spinner1.SelectedIndex)

Log(SelectedID)
End Sub

Mahares · Sep 24, 2014

Is this what you have in mind:

B4X:

Sub Globals
    Dim Spinner1 As Spinner
    Dim SpinList1 As List
    Dim SpinMap As Map
End Sub

Sub Activity_Create(FirstTime As Boolean)

    Activity.LoadLayout("Main")  'Contains  spinner1

    SpinList1.Initialize
    SpinMap.Initialize
    Spinner1.AddAll(Array As String("Text1","Text2","Text3","Text4"))
    SpinList1.AddAll(Array As String("ID1","ID2","ID3","ID4"))
    For i=0 To Spinner1.Size-1  
       SpinMap.Put(Spinner1.GetItem(i), SpinList1.Get(i))
    Next
End Sub

Sub Activity_Pause (UserClosed As Boolean)

End Sub

Sub Spinner1_ItemClick (Position As Int, Value As Object)
    Dim Myid As String
    Myid = SpinMap.Get(Value)
    Log(Myid)
End Sub

DonManfred · Sep 24, 2014

Mahares said:
Is this what you have in mind:

Top... I would have answered an similar solution (also using a map)

LucaMs · Sep 24, 2014

I'd use a map to be included in the tag of the spinner, as I have done here.

AHilberink · Sep 25, 2014

Hi,

Thanks for all the replies.

I wonder if someone can tell me why to use a Map, instead of a List?

I do get my value using:

B4X:

Sub Spinner1_ItemClick (Position As Int, Value As Object)
SelectedID = SpinList1.Get(Spinner1.SelectedIndex)

Log(SelectedID)
End Sub

Best regards,
André

LucaMs · Sep 25, 2014

AHilberink said:
Hi,

Thanks for all the replies.

I wonder if someone can tell me why to use a Map, instead of a List?

I do get my value using:

B4X:

Sub Spinner1_ItemClick (Position As Int, Value As Object) SelectedID = SpinList1.Get(Spinner1.SelectedIndex) Log(SelectedID) End Sub

Best regards,
André

In this case, use a List or a Map makes no difference.
But the Maps can contain objects, not just text, and in other cases they are more useful.

My suggestion is to put the List or Map in the Tag Spinner, instead of declaring it as a global variable

klaus · Sep 25, 2014

List contains objects too, not only text !

LucaMs · Sep 25, 2014

klaus said:
List contains objects too, not only text !

Sorry, you're right: Maps can use objects as keys

DonManfred · Sep 25, 2014

LucaMs said:
Sorry, you're right: Maps can use objects as keys

No they can't... Maps can use Objects as VALUES but not as keys.

LucaMs · Sep 25, 2014

DonManfred said:
No they can't... Maps can use Objects as VALUES but not as keys.

DonManfred · Sep 25, 2014

Ahhh... Ohhh!
I never thought Key can be an Object... I always thought it has to be a String...

Thank you for correcting me!

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