Android Question Service to activity label

Pedro Caldeira · Jan 15, 2018

Hi,
I am trying to send some text from a sub in a service to a label in the activity.
I always get an error

Service

B4X:

Sub WinRESTSocket_NewConnection (Successful As Boolean, NewSocket As Socket)

    If Successful Then
        IncomingStream.Initialize(NewSocket.InputStream, NewSocket.OutputStream, "IncomingStream")
        CallSubDelayed2(Main,"ShowLog","Connected to WinREST")
    End If
    WinRESTSocket.Listen

End Sub

Activity

B4X:

Sub ShowLog(Text2show As String, clear As Boolean)
    If clear = True Then
        lblStatus.text=""
    Else
        lblStatus.text = lblStatus.text & Text2show & CRLF
    End If
End Sub

Error

B4X:

-------- beginning of main
*** Service (starter) Create ***
** Service (starter) Start **
** Activity (main) Create, isFirst = true **
** Activity (main) Resume **
** Activity (main) Pause, UserClosed = false **
sending message to waiting queue (CallSubDelayed - ShowLog)
running waiting messages (1)
An error occurred: 
(Line: 61) End Sub
java.lang.Exception: Sub showlog signature does not match expected signature.
public static anywheresoftware.b4a.pc.RemoteObject p2g.Wrst2Zarph.main_subs_0._showlog(anywheresoftware.b4a.pc.RemoteObject,anywheresoftware.b4a.pc.RemoteObject) throws java.lang.Exception

class anywheresoftware.b4a.pc.RemoteObject,

Pedro Caldeira · Jan 15, 2018

thanks.
I am going to try

Jeffrey Cameron · Jan 15, 2018

Error:

Pedro Caldeira said:
java.lang.Exception: Sub showlog signature does not match expected signature.

Cause:

Pedro Caldeira said:
CallSubDelayed2(Main,"ShowLog","Connected to WinREST")

You're expecting two parameters, a string and a Boolean and you're only passing a string. Also, you should probably change the name of the sub to "Show_Log" if you plan to obfuscate the project at some point.

DonManfred · Jan 15, 2018

This is the signature from callsubdelayed2

CallSubDelayed2 (Component As Object, Sub As String, Argument As Object)

The last parameter is an OBJECT. You only can give ONE parameter.
You are giving a String here....

B4X:

CallSubDelayed2(Main,"ShowLog","Connected to WinREST")

But your sub needs two parameters... So i suggest to use a List or a Map as Parameter and get the right values out of the List/Map.

Additionally you should have an underscore in the subname if you plan to compile obfuscated.

B4X:

dim m as map = CreateMap("Text2Show":"MyText","Clear":true)
CallSubDelayed2(Main,"Show_Log",m)

B4X:

Sub Show_Log(cfg as Map)
    dim text2show as string = cfg.get("Text2Show")
    dim clear as boolean = cfg.get("Clear")   
If clear = True Then
        lblStatus.text=""
    Else
        lblStatus.text = lblStatus.text & Text2show & CRLF
    End If
End Sub

LucaMs · Jan 15, 2018

DonManfred said:
This is the signature from callsubdelayed2

CallSubDelayed2 (Component As Object, Sub As String, Argument As Object)

DonManfred said:
But your sub needs two parameters... So i suggest to use a List or a Map as Parameter and get the right values out of the List/Map.

There is also CallSubDelayed3 to pass 2 parameters.

DonManfred · Jan 15, 2018

you also can use CallSubDelayed3 and pass two parameters.
But if you need more parameters then you need to use a Map or a List. So i suggest to use a Map directly. You can put everything into the Map.

LucaMs · Jan 15, 2018

I know; it was just to inform HIM that CallSubDelayed exists

If you need to pass only two parameters it is better, because you know their type...

DonManfred · Jan 15, 2018

LucaMs said:
I know; it was just to inform HIM that CallSubDelayed exists

My answer was NOT meant to YOU! I´m NOT INTERESTED in anything you write (say it layoutproblems, nullpointer exceptions or whatever). You are on my ignorelist. So basically i do not see such posts. But sometime i reveal the post...

Don´t expect any answer from me (expect this one) to be a answer to your post!

LucaMs · Jan 15, 2018

DonManfred said:
My answer was NOT meant to YOU!

Neither mine was for you; I just wanted to say that there is also that version of the command.

Take a chamomile, every now and then! And continue to ignore me, thank you!

Android Question Service to activity label

Pedro Caldeira

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