Android Question Implicit CAST Integer to String not work some time

[Gianni Sassanelli]

Hi
I use most of time, string parameter in my sub
For example

Sub mySub(sPar as String)
workMode = sPar                      'Dim WorkMode As Int    is declared in Sub GLOBALS of activity
end Sub

' I call my sub with this code
CallSubDelayed2(Me,"mySub", 64+5)   ' this work fine in the most of time but some time i have an exception

java.lang.IllegalArgumentException: method it.techservice.tpick.mySub argument 1 has type java.lang.String, got java.lang.Integer

how can i avoid this behavior?
thanks

 

[angel_]

Try this

CallSubDelayed2(Me,"mySub", (64+5) & "")

 

[Star-Dust]

try this

CallSubDelayed2(Me,"mySub", $"$1.0{(64+5)}"$)

Or this, but I consider it less clean

CallSubDelayed2(Me,"mySub","" & (64+5))

 

[Gianni Sassanelli]

try this

CallSubDelayed2(Me,"mySub", $"$1.0{(64+5)}"$)

Or this, but I consider it less clean

CallSubDelayed2(Me,"mySub","" & (64+5))

Thank you Star-Dust
i have resolved with your second example, but dubt remain.
Why some time the cast work and in other time not?

 

[Star-Dust]

Thank you Star-Dust
i have resolved with your second example, but dubt remain.
Why some time the cast work and in other time not?

B4A is based on java. In java sometimes variable casting needs to be clarified, because you can use a variable in different ways.
In this case it's an Object, so you don't identify the variable type. In java to clarify you would write: MySub (String Variable). By preceding the type to the variable name (or data) you clearly indicate how you want to understand the data.

Unfortunately in B4A this feature does not exist and therefore to specify that that data is a string (or an integer or float) you have to use different means.

A method for strings is what you have seen, but a general method is like this:

Dim MyString as String = MyGenercObject
CallSub (Name, MyString)

Dim MyInt as Int= MyGenercObject

CallSub (Name, MyInt)

Dim MyDouble as Double= MyGenercObject

CallSub (Name, MyDouble)

 

[LucaMs]

so you don't identify the variable type. In java to clarify you would write: MySub (String Variable). By preceding the type to the variable name (or data) you clearly indicate how you want to understand the data

Unfortunately in B4A this feature does not exist

This:

MySub (String Variable)

is exactly the same of his b4a routine:

Sub mySub(sPar as String)

I don't know if-why-when the casting results incorrect; anyway, you should not use a String as parameter in your routine if you have the "need" to pass other types to it, declare sPar As Object.

 

[Mahares]

Here is my take using Resumable Sub, a different way but not any better than what was given above:

wait for (mySub(64+5)) Complete (res As Int)
 Log(workMode)  'display 69

Sub mySub(sPar As Object) As ResumableSub
    workMode = sPar   
    Return workMode   'Dim WorkMode As Int    is declared in Sub GLOBALS of activity
End Sub

 

[Star-Dust]

This:

is exactly the same of his b4a routine:
Sub mySub(sPar as String)

I was not referring to the declaration of a method but to the invocation of a method

Eg:

Dim C as int = 10
MySub(String C)


Sub MySub(Var As String)

End SUB

 

[toby]

Another way:

Dim s as string=64+5
CallSubDelayed2(Me,"mySub", s)

 

[Erel]

Why are you using CallSubDelayed???

Sleep(0)
MySub(s)