Android Question Get all views in Tabstrip

[warayTek]

Hello everyone, I'm trying to get all views in a tabstrip

I am getting a null return, using the code below.

Private Sub getFieldsInfo(findtag As String) As String
    Dim lbl As Label
    For Each v As View In Panel1.GetAllViewsRecursive ' txtAccntNum
    
        If v Is Label  Then
            lbl = v
            If v.tag = findtag Then
                Log(v.tag)
                Dim mdata As String
                mdata = lbl.Text
                Log(mdata)
                Return mdata
            End If
        End If
    Next
    Return False
End Sub

Thank you for your time.

 

[Sagenut]

I think because you are mixing between "v" and "label".
After assigning "v" to "lbl" you should refer only to "lbl".
Try this

Private Sub getFieldsInfo(findtag As String) As String
    For Each v As View In Panel1.GetAllViewsRecursive ' txtAccntNum
   
        If v Is Label  Then
            Dim lbl as Label
            lbl = v
            If lbl.tag = findtag Then
                Log(lbl.tag)
                Dim mdata As String
                mdata = lbl.Text
                Log(mdata)
                Return mdata
            End If
        End If
    Next
    Return False
End Sub

 

[warayTek]

I think because you are mixing between "v" and "label".
After assigning "v" to "lbl" you should refer only to "lbl".
Try this

Private Sub getFieldsInfo(findtag As String) As String
    For Each v As View In Panel1.GetAllViewsRecursive ' txtAccntNum
  
        If v Is Label  Then
            Dim lbl as Label
            lbl = v
            If lbl.tag = findtag Then
                Log(lbl.tag)
                Dim mdata As String
                mdata = lbl.Text
                Log(mdata)
                Return mdata
            End If
        End If
    Next
    Return False
End Sub

Hello, I get the following error:

Logger connected to: 055542508O000936
--------- beginning of crash
--------- beginning of system
--------- beginning of main
*** Service (starter) Create ***
** Service (starter) Start **
** Activity (main) Create (first time) **
** Activity (main) Resume **
main_getfieldsinfo (java line: 410)
java.lang.NullPointerException: Attempt to invoke virtual method 'boolean java.lang.Object.equals(java.lang.Object)' on a null object reference
    at b4a.example.main._getfieldsinfo(main.java:410)
    at b4a.example.main._mnu1_click(main.java:446)
    at java.lang.reflect.Method.invoke(Native Method)
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:221)
    at anywheresoftware.b4a.BA$1.run(BA.java:360)
    at android.os.Handler.handleCallback(Handler.java:883)
    at android.os.Handler.dispatchMessage(Handler.java:100)
    at android.os.Looper.loop(Looper.java:264)
    at android.app.ActivityThread.main(ActivityThread.java:7581)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:980)

 

[Sagenut]

Remove the

Return False

I forgot it.
Or change it with

Return ""

to have an empty string in return if nothing is found.

 

[warayTek]

Remove the

Return False

I forgot it.
Or change it with

Return ""

to have an empty string in return if nothing is found.

Thank you for the time, but unfortunately, I still have the same error:

*** Service (starter) Create ***
** Service (starter) Start **
** Activity (main) Create (first time) **
** Activity (main) Resume **
main_getfieldsinfo (java line: 410)
java.lang.NullPointerException: Attempt to invoke virtual method 'boolean java.lang.Object.equals(java.lang.Object)' on a null object reference
    at b4a.example.main._getfieldsinfo(main.java:410)
    at b4a.example.main._mnu1_click(main.java:446)
    at java.lang.reflect.Method.invoke(Native Method)
    at anywheresoftware.b4a.BA.raiseEvent2(BA.java:221)
    at anywheresoftware.b4a.BA$1.run(BA.java:360)
    at android.os.Handler.handleCallback(Handler.java:883)
    at android.os.Handler.dispatchMessage(Handler.java:100)
    at android.os.Looper.loop(Looper.java:264)
    at android.app.ActivityThread.main(ActivityThread.java:7581)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:492)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:980)

 

[Sagenut]

Please post a project that show the issue to check it better.

 

[Sagenut]

Here a working example

 

[warayTek]

Please post a project that show the issue to check it better.

Here is the link. I'm sorry I can't attach the demo app here directly.
Your example is working great, thank you. But not in mine.

 

[Sagenut]

I am not used to TabStrip so I could not have done the best/correct method.
Your issue was that you have Panel1 as base panel in all pages.
Using Panel1 as target it will reference the last one added, so Page 3.
I renamed the panels on the 3 pages as Panel1, Panel2, Panel3.
Then I declared another panel, currentpanel, that will reference the right one when changing page.
Check the code.

 

[warayTek]

Works great Sagenut! ?