[Android] Utilize Java better

[JackAppDev]

@FaisalAbid @ened @buraktamturk ?

[thosakwe]

Is there a specific reason for this?

[JackAppDev]

Could end up being simpler 🤷🏼‍♂️

[JackAppDev]

My thinking was that kotlin seems much more similar to swift and then it could be easier to convert from one to the other later on.

[thosakwe]

I guess that's fair, but OTOH to develop with Kotlin you need JetBrains (I think?), so that could potentially be a barrier to people who want to contribute to the project.

[JackAppDev]

It appears this isn't a clear improvement so I'll let others weigh in.

[ened]

It yields simpler code, and is supported by the android tool chain (no need “JetBrains”...)
However it also adds a dependency on kotlin runtime environment which may increase app size, compilation is a little slower and it’s a new language which new contributors may or may not know.

If the current plugin works, I’d rather not change language at the moment and instead focus on proper testing and completeness.

If you want more concise code, then switching to java 8 syntax is a immediate step. It’s easy to activate, too - but please test first if flutter has any guidance on this.

[JackAppDev]

This is now for better coding practices in the android implementation. Less string concatenation, more OOP.

[ened]

@JackAppDev Are you ok if we include a library like https://github.com/square/moshi to generate the JSON responses from simple POJOs?