Android Question RunMethod How to reflect objects

[Wshcs]

I have a class, let's say the name classa
There's a method in there, clear
I'm trying to reflect references externally,
dim a as classa
Dim r As reflect
r.Target = a
r.RunMethod("clear"), this sentence always prompts an error, what should I do, thanks

 

[RJB]

Should that be:
Dim r as reflector?

 

[Wshcs]

Sorry, the current input is wrong
dim a as classa
Dim r As reflector
r.Target = a
r.RunMethod("clear"), this sentence always prompts an error, what should I do, thanks

 

[LucaMs]

Should that be:
Dim r as reflector?

Yes, "r" must be declared of type Reflector.
Also, "a" was not initialized.

However, even by fixing those errors, you get method not found error (java.lang.NoSuchMethodException), even though the method exists.

 

[Erel]

Is this your class?
Why do you need reflection?

You can call it with CallSub.

 

[LucaMs]

Is this your class?
Why do you need reflection?

You can call it with CallSub.

Of course, even directly (object.method).
I don't know why he wants to do this, but I would like to know the reason for the error generated (even if just out of curiosity).

 

[Erel]

1. It will only work in release mode.
2. Check the generated Java code.

 

[LucaMs]

1. It will only work in release mode.
2. Check the generated Java code.

I had thought about Release mode, tried it but got the same error.

Now I have written a new test project, B4XPages (yesterday it was not B4XPages project, "classic" B4J and B4A). For the moment I have only tried the B4J - Release mode project and the method is not found.

EDIT: B4A - Release: same error.

Sub Class_Globals
    Private Root As B4XView
    Private xui As XUI
  
    Private mobjSomething As clsSomething
    Private mReflector As Reflector
End Sub

Public Sub Initialize
'    B4XPages.GetManager.LogEvents = True
    mobjSomething.Initialize
End Sub

'This event will be called once, before the page becomes visible.
Private Sub B4XPage_Created (Root1 As B4XView)
    Root = Root1
    Root.LoadLayout("MainPage")
End Sub

'You can see the list of page related events in the B4XPagesManager object. The event name is B4XPage.

Private Sub Button1_Click
    mReflector.Target = mobjSomething
  
    mReflector.RunMethod("LogText")
  
    mReflector.RunMethod2("LogText2", "Ciao", "java.lang.String")
End Sub

Sub Class_Globals
End Sub

'Initializes the object. You can add parameters to this method if needed.
Public Sub Initialize
    
End Sub

Public Sub LogText
    Log("LogText")
End Sub

Public Sub LogText2(Text As String)
    Log("LogText")
End Sub

java.lang.NoSuchMethodException: java.lang.Object.LogText()

 

[Daestrum]

@LucaMs maybe it's like using javaobject, you have to pass the object to operate on

mobjSomething.as(JavaObject).RunMethod("_logtext",Array(mobjSomething))

 

[LucaMs]

@LucaMs maybe it's like using javaobject, you have to pass the object to operate on

mobjSomething.as(JavaObject).RunMethod("_logtext",Array(mobjSomething))

For mobjSomething the "As" method is not allowed

Trying:

    Dim JO As JavaObject
    JO = mobjSomething ' Types do not match. (warning #22)
    JO.RunMethod("LogText", Null)

 

[Erel]

JO.RunMethod("_logtext", Null)

 

[LucaMs]

JO.RunMethod("_logtext", Null)

Impossible, since:

    JO = mobjSomething ' Types do not match. (warning #22)

 

[Erel]

It is a warning. Ignore it.

 

[LucaMs]

JO.RunMethod("_logtext", Null)

Same error, not found ? (B4J -Release)

 

[LucaMs]

Same error, not found ? (B4J -Release)

No! _logtext works, _LogText not!

 

[agraham]

_logtext works, _LogText not

B4X lower cases names when it transpiles to Java so in B4X thay can be called case independently.