Android Question wait for Error

modiran_ghaneipour · Mar 2, 2025

hello
i use wait for in other module

B4X:

public Sub sendToUrl(   url As String ) As ResumableSub
    'Log(Sender.As(B4XPagesManager.GetPageInfoFromRoot.B4XPage.))'
    LogColor(DateTime.Now,Colors.Magenta)
   
    Dim j1 As HttpJob
    j1.Initialize("", Sender)
    j1.Download(url)'"https://www.google.com")
    Wait For (j1)     JobDone(j  As HttpJob)
    If j .Success Then
        Dim str1 As String =j.GetString
        LogColor(str1,Colors.RGB(45,45,45))
 
    Else
        LogColor("Error..",Colors.Red)
    End If
    j.Release
   
    LogColor(DateTime.Now,Colors.Blue)
    Return False'
End Sub

if i use this code in root of each page, it work true

but if i copy this code in "Code Module" class it told cannot use wait in static function

"Error description: Static code modules cannot handle events."

plz help

thanks

Erel · Mar 2, 2025

Static modules do not support events (in B4A) and resumable subs. Use a class instead. And make sure to use B4XPages.

modiran_ghaneipour · Mar 4, 2025

hi
i need all public function be in same class.

in b4a , how i can do this?

for example all data transfer be in networking.class and ....

thanks

Erel · Mar 4, 2025

Exactly like you do with a static code module. You just need to create an instance of the class:

B4X:

Dim ClassObject As TheNewClass
ClassObject.Initialize

modiran_ghaneipour · Mar 5, 2025

hello

inside class have this error and cannot use this module.

i use this code in main

Dim ClassObject As httpclass2
ClassObject.Initialize

this is in main

Erel · Mar 5, 2025

What is the error?

Daestrum · Mar 5, 2025

Not properly awake yet, but shouldnt it be Class_Globals and not Process_Globals in a class?

DonManfred · Mar 5, 2025

Daestrum said:
but shouldnt it be Class_Globals and not Process_Globals in a class?

In principle, yes.

But the TO is using a CodeModule, not a class. See line 1 on the Screenshot in #5

DonManfred · Mar 5, 2025

modiranghaneipour said:
inside class have this error and cannot use this module

It is NOT A CLASS. See Line 1 of httpclass2. It is a codemodule.
Static modules can not handle events.

The solution ist to switch to a Class, a Service or an Activity.
Best is to use B4XPages.
Remember that B4XPage pages are classes.

modiran_ghaneipour · Mar 5, 2025

t

Daestrum said:
Not properly awake yet, but shouldnt it be Class_Globals and not Process_Globals in a class?

thanks
how i must do this
step by step plz

josejad · Mar 5, 2025

modiranghaneipour said:
inside class have this error

What we are trying to say is that you're not using a class, but a code module.

Add a "Standar class" and copy the code from your "Code Module" called http2class to the new created (and real) class

modiran_ghaneipour · Mar 5, 2025

Erel said:
What is the error?

josejad said:
What we are trying to say is that you're not using a class, but a code module.

Add a "Standar class" and copy the code from your "Code Module" called http2class to the new created (and real) class

View attachment 162279

ok
it have not Error.
but on run project wait on this line
"Wait For (j1) JobDone(j1 As HttpJob)"
in mainpage this line work true but it this class only wait

in main i use this:

Dim ClassObject As httpclass3
ClassObject.Initialize
ClassObject.sendToUrl( "http://1xxxx3:8891/token?User=1&Pass=1")

modiran_ghaneipour · Mar 5, 2025

DonManfred said:
It is NOT A CLASS. See Line 1 of httpclass2. It is a codemodule.
Static modules can not handle events.

The solution ist to switch to a Class, a Service or an Activity.
Best is to use B4XPages.
Remember that B4XPage pages are classes.

when we can use "code module" and when we can use "standard class"? i need more info. have you manual or datasheet in this way?
thanks

josejad · Mar 5, 2025

modiranghaneipour said:
have you manual or datasheet in this way?

i create new lib via b4a but not work in other b4a

hello i use Project/CompileToLib (Alt+5); create new test1.java(lib) via file1 b4a and copy this file to library folder create new project and refresh libs but cannot find my create lib have sample or film or tutorial to learn create library in B4a in library project i create new...

www.b4x.com

DonManfred · Mar 5, 2025

modiranghaneipour said:
when we can use "code module" and when we can use "standard class"? i need more info. have you manual or datasheet in this way?

There are a lot of Material to go through. Just do it

modiran_ghaneipour · Mar 6, 2025

DonManfred said:
There are a lot of Material to go through. Just do it

B4X Programming Learning Resources

Resources for B4X programming language and tools

www.b4x.com

B4A Documentation

www.b4x.com

Or watch Videos

B4X Programming Video Tutorials

www.b4x.com

yes
i see video and read docs

but cannot see any about different between code module and standard module.

thanks

DonManfred · Mar 6, 2025

modiranghaneipour said:
but cannot see any about different between code module and standard module.

It is one of the Videos i already linked.
Checking the list of available videos would help

josejad · Mar 6, 2025

modiranghaneipour said:
read docs

but cannot see any about different between code module and standard module.

https://www.b4x.com/guides/B4XCustomViews.html#pf7

I will start by explaining the differences between classes, code modules and types.

Similar to types, classes are templates. From this template, you can instantiate any number of
objects.
The type fields are similar to the classes’ global variables. However, unlike types which only define
the data structure, classes also define the behaviour. The behaviour is defined in the classes’ subs.

Unlike classes which are a template for objects, code modules are collections of subs. Another
important difference between code modules and classes is that code modules always run in the
context of the calling sub. The code module does not hold a reference to any context. For that
reason, it is impossible to handle events or use CallSub with code modules.
Classes store a reference to the context of the module that called the Initialize sub. This means that
classes objects share the same life cycle as the module that initialized them.

Android Question wait for Error

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