Android Question Problem with CallSub

HARRY · Mar 8, 2017

I have a project with several activities.
The main activity, called Main takes care of a.o. asyncstreamtext. Sending is done as follows

B4X:

Public Sub Send (Mess As String)
    If Stream1.IsInitialized = False Then  Stream1.Initialize(Me,"Stream1",Client1.InputStream,Client1.OutputStream)  'to Raspberry
    Stream1.Write(Mess&CRLF)
   
End Sub

Another activity also has to send some data.I tried to do so, based on sampl code which I do not completely understand, as follows:

B4X:

Sub sendrequest(text As String)
Dim request As Object= text
    Dim jo As JavaObject =request
    CallSub2(Main,"send",jo)
End Sub

DonManfred · Mar 8, 2017

If you are in activityX then you cannot start a sub in main activity (it is paused!)
Use CallSubDelayed to start main activity and the sub.

Better use a service to do all the asyncstream-things... Call the sub in the service then.

Erel · Mar 9, 2017

DonManfred said:
Better use a service to do all the asyncstream-things... Call the sub in the service then.

+1

HARRY · Mar 9, 2017

Thanks Erel and DonManfred!

I moved everything about asyncstreams to a Service module. But I still have problems to get the information I want to send correctly sent to the other side.

In the main module eg. I write:

B4X:

mcode=15
Dim request As Object= mcode & s   'two variables, s="|"
Dim jo As JavaObject =request
CallSub2(StreamService,"send",jo)

This gives java errors. I tried several other formats; some really send information, but the receiving side then get the text "String 15|"

The service module has the code:

B4X:

Public Sub Send (Mess As String)
    If Stream1.IsInitialized = False Then  Stream1.Initialize(Me,"Stream1",Client1.InputStream,Client1.OutputStream)  'to Raspberry
    Stream1.Write(Mess&CRLF)  
End Sub

Could somebody correct these small pieces of code! Please.

Harry

Erel · Mar 10, 2017

Are you using B4J to program the RPi?

If so then you should initialize it in prefix mode and use B4XSerializator to create the messages.

Android Question Problem with CallSub

HARRY

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DonManfred

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Erel

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HARRY

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Erel

B4X founder

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