Android Question Java Inline Code in Class or Code Module?

[ilan]

hi

i want to use a java inline code from a class module or a code module
but how do i do this?

i put the javaobject in the codemodule and also the java inline code but when i try to run it i get an error
that the java code was not found.

when i run it from the main activity it is working

error: java.lang.RuntimeException: Method: not matched.

 

[DonManfred]

See the inline java tutorial. Especially the sample project. It shows how to use inline java in all module-types

 

[ilan]

do you have a link?

 

[ilan]

oh do you mean that one?

https://www.b4x.com/android/forum/threads/inline-java-code.50141/#content

i saw it but could not figure out how to do it

 

[DonManfred]

oh do you mean that one?

Yes.

See the attached project. It shows how to call Java methods in all types of modules

Check the Sample Project again. There is a Servicemodule, a Classmodule a Codemodule and an Activity module in use

 

[ilan]

i need to make it in a class or module

when i use it in main activity i intialize the java object with

nativeMe.InitializeContext

and then i call the nativeMe.runmethod with ...(Array(nativeMe,GetPackageName))

but in class module i get an error Method not matched

 

[ilan]

in the example i see that erel doesnot intialize the javaobject in the class he only say nativeMe = Me

so i do the same but get an error

 

[JordiCP]

Dim a public (JavaObject)nativeMe un Main Process Globals, and try this

nativeMe.RunMethod("yourInlineJavaMethod",Array(Main.nativeMe,GetPackageName))

 

[Informatix]

Code modules are made of static functions so you have to initialize the JavaObject with InitializeStatic not InitializeContext (there's no context; it's not an activity).

Dim MyJavaCode As JavaObject
MyJavaCode.InitializeStatic(Application.PackageName & ".mycodemodulename")
MyJavaCode.RunMethod("MyMethod", Null)

#If JAVA
public static void MyMethod() {
...

In a class module, you can do the same.

 

[ilan]

Thank you @Informatix i will try it out.

I have not much experience with the java object but it seems like it is very powerful since you can use 100% java code in your app.

 

[Informatix]

Thank you @Informatix i will try it out.

I have not much experience with the java object but it seems like it is very powerful since you can use 100% java code in your app.

Yes, but knowing Java is a pre-requisite anyway. Pasting code from Internet won't work most of the time.

 

[JordiCP]

In Ilan's example, he needs to pass a context to the called Inline Java function. With initializeStatic you can call methods but not use the same JavaObject as a context to be passed as a parameter
I think (may be wrong) we need to pass the context of the activity which initted the class instance, assuming it was "main". (In fact, it would be better if one of the params used to init this class was the same activity's context)

 

[ilan]

In Ilan's example, he needs to pass a context to the called Inline Java function. With initializeStatic you can call methods but not use the same JavaObject as a context to be passed as a parameter
I think (may be wrong) we need to pass the context of the activity which initted the class instance, assuming it was "main". (In fact, it would be better if one of the params used to init this class was the same activity's context)

this was exactly my problem yesterday but i passed it by using a global java object from the main activity (like you have suggested)
would interest me to see if i can do it without the global java object.

 

[JordiCP]

try this and keep the global java object private

(In fact, it would be better if one of the params used to init this class was the same activity's context)

 

[ilan]

was the same activity's context

can you please explain jordiCP?

 

[Informatix]

In Ilan's example,

Where is it?

he needs to pass a context to the called Inline Java function.

If you need the context in a class module, it's a different story of course.
If you need the application context, you can get it directly in Java with BA.applicationContext. If you need the activity context, you have to pass it.

 

[ilan]

Where is it?

nativeMe.runmethod with ...(Array(nativeMe,GetPackageName))

 

[ilan]

what i want to do is to get the result (boolean or string) from the codemodule that uses Content peckagemenager

 

[JordiCP]

In main, or the activity where you instantiate your class

  myClass.initialize(nativeMe)   'this is the global activityContext

and in your class

Sub Class_Globals
    Private nativeMe As JavaObject
    Private CallerContext As JavaObject
End Sub

'Initializes the object. You can add parameters to this method if needed.
Public Sub Initialize( CallerActivityContext As JavaObject)
    nativeMe = Me
    CallerContext=CallerActivityContext
    Log(nativeMe.RunMethod("mymethod", Array (CallerContext,...)))
End Sub

if it is a code module, then do the same, passing the activity context as one of the arguments of that Sub in the code module

 

[ilan]

In main, or the activity where you instantiate your class

  myClass.initialize(nativeMe)   'this is the global activityContext

and in your class

Sub Class_Globals
    Private nativeMe As JavaObject
    Private CallerContext As JavaObject
End Sub

'Initializes the object. You can add parameters to this method if needed.
Public Sub Initialize( CallerActivityContext As JavaObject)
    nativeMe = Me
    CallerContext=CallerActivityContext
    Log(nativeMe.RunMethod("mymethod", Array (CallerContext,...)))
End Sub

if it is a code module, then do the same, passing the activity context as one of the arguments of that Sub in the code module

This is exactly what i do
But is it possible without the javaobject in main activity?