Backdoor couldn't find methods on target : application / activity if the code written in Kotlin

So I have 2 android application written in Kotlin and Java …

I tried to call public method on my Java Android Application both inside activity and application. It worked!

ImmutableMap<String, Object> scriptArgs = ImmutableMap.of(
                "target", "application",
                "methods", Arrays.asList(ImmutableMap.of(
                        "name", "createToast",
                        "args", Arrays.asList(ImmutableMap.of(
                                "value", "Hello",
                                "type", "String"
                        ))
                ))
        );

androidDriver.executeScript("mobile: backdoor", scriptArgs);

But when i want to try it on Kotlin Android Application, somehow espresso couldn’t find any public methods inside activity nor application. So I tried to use companion object and moved the function inside and marked it with @JvmStatic annotation.

ImmutableMap<String, Object> scriptArgs = ImmutableMap.of(
                "target", "application",
                "methods", Arrays.asList(ImmutableMap.of(
                        "name", "com.xxx.xxxxAplication.Companion.createToast",
                        "args", Arrays.asList(ImmutableMap.of(
                                "value", "Hello",
                                "type", "String"
                        ))
                ))
        );

androidDriver.executeScript("mobile: backdoor", scriptArgs);

Is there anything that i can do to get the list of methods inside Java Code / Kotlin Code with backdoor ? Just for debugging purpose.

And is there any solution for this ?

Thank you !

[KazuCocoa]

Thanks! I took a glance at the code and found setAccessible(true);. ah… final modifier affected. Will add the kotlin case in doc.

[aldochristiaan]

Hey guys @dpgraham @rajdeepv @KazuCocoa … I found out that we have to put open in front of the methods 😁

open fun methodName() will be decompiled into public void methodName()

Case closed! Thanks @KazuCocoa for pointing out kotlin bytecode … Maybe we have to add documentation about this on appium mobile native command especially for kotlin app 🥇