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Yes but CallSub() is quite slow as, compared to a direct call, it has to look up the method to call in a hashtable and invoke it by reflection. It's not a huge overhead, particularly if the called Sub does significant processing, but if called repeatedly for a trivial Sub, say in a loop, it could im
link: Related example: https://www.b4x.com/android/forum/threads/b4x-sophisticated-sorting-with-b4xcomparatorsort.139006/#content Note that there is an imp
link: What about using duck typing and CallSub()? If each object has the same methods...? I'm just thinking there's got to be a way to extend his algorithm

Use an array or a map. It is very simple.
link: Currently you can pass a maximum of two parameters, using CallSub3 (or CallSubDelayed3). The ideal would be that you could pass any number of paramete
link: ' mmm what number and type variables should I pass to this strange routine? Sub DoSomething(Data() As Object) '... End Sub ' ok I have to pass: ...
link: But when you read a call like the second in the example... CallSub(X, "DoSomething", arrData) ' ??? CallSub(X, "DoSomething", NameX, AgeX, AddressX,

Ok, I may display my ignorance here, but CallSubDelayed creates an event, CallSub is a direct call and would therefore not give your app a chance to process other events. Plus if it were an Event generator, the sub would never get called (and here it is) since the loop has nothing in it to allow the
link: Tried... with no luck. Even if I think CallSubDelayed, in this case, is the same as CallSub because the current activity is alive...

It's nothing like the old Gosub! CallSub is probably the nearest equivalent to GoSub as with that you can do run-time determination of which Sub to call. This is a pause and resume capability that uses events raised on the message loop of the main thread to manage it.

Got it working. :) I called CallSub(Starter, "StartGPS") from the scheduled service module which was in the Starter service module. From the Starter module I did all of the processing from GPS_LocationChanged by first stopping the GPS so that event won't be called repeatedly. This all happened whe
link: Hi Marcus, I found that I can start the GPS with CallSub(Starter, "StartGPS") from another activity module and GPS_LocationChanged from the starter

Hello, Despite much research I did not understand the difference between true and false in the javascript command B4A.CallSub('subInB4a', false, data); and B4A.CallSub('subInB4a', true, data); Thank you so much
link: Does the Sub called by your javascript modify your activity UI? If the answer is yes then you need to pass boolean true as callUIThread otherwise you

You should use: CallSub (Me, "RE") Or simply : Re Because the Sub is in the same module.
link: Honestly, I have not use CallSub for many years or almost never use it. Just switch to B4XPages.
link: The syntax is : CallSub(Main, "RE") or Consider using CallSubDelayed
link: Whether it is in the same module or in the main is not mentioned and it seems to be in the main because of the use of a UI (EditText1_EnterPressed) I

Notes - Make sure to include an underscore in the target subs names if you intend to compile with obfuscation. - CallSubDelayed will start the target service or activity if needed (see this tutorial for more information: https://www.b4x.-callsubdelayed-to-interact-between-activities-and-services.18
link: As you know, you can get a warning if you declare a Timer elsewhere than in Process_Globals. Here you declare a Timer in a sub; I suppose that the war
link: That's true. If you declare a global timer then it should be declared in Process_Globals instead of Globals. Otherwise, new timers will be created eac
link: CallSub will never crash because of a paused activity.

B4A.CallSub("", true) 'Or B4A.CallSub("", true, "message1") 'Or B4A.CallSub("", true, "message1", "message2") 'Or B4A.CallSub("", true, "message1", "message2", "message3") 'Or B4A.CallSub("", true, "message1", "message2", "message3", "message4") 'Or var value1 = B4A.CallSub("", false,.....) B4A.Sho
link: Thank you Ivica. Most of the projects involves IOS as well.. That is the only reason i have to switch to native instead of Webview as current Webview
link: In a few days, a new version of the library will be released, which will include the UltimateJavascriptInterface class, which will include CallSub, Sh
link: Hi How properly use AddJavascriptInterface and CallSub from ultimatewebview?

I don't recommend using this code. CallSub is treated in a special way by the compiler. If you need to pass multiple parameters to a sub that called with CallSub then change its signature to: Sub MySub (Params() As Object) And call it with: CallSub(Me, "MySub", Array(1, 2, 3, 4)) Or pass a cu
link: I made this to raiseEvents from custom libraries
link: Sub CallSubX (Component As Object,SubName As String,Params() As Object) Dim no As NativeObject=Component Dim name As String=SubName Dim ll

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