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by kevmo314 699 days ago
Getting native libraries to work well on Android is a beast. I happened to have done exactly what you're describing though, specifically rendering libusb through an Android phone. My code is at https://github.com/kevmo314/kineticstreamer and you might be particularly interested in the CMake build at https://github.com/kevmo314/kineticstreamer/blob/main/app/sr...

Happy to answer any questions or help you out if you decide to keep going down this road, shoot me an email at kevmo314@gmail.com. Ultimately an Android phone is still just a Linux computer but jumping through the hoops is definitely hard.
3 comments
iiJDSii 699 days ago
Hey thanks for this! I gave it a try, imported and built in my Android Studio ("Koala" if that matters), tried getting it installed on a phone, and unfortunately got this cryptic error:

> ninja: error: 'lib/libjpeg.so', needed by 'C:/Users/ADMIN/AndroidStudioProjects/kineticstreamer/app/build/intermediates/cxx/Debug/3xf5p505/obj/arm64-v8a/libkinetic.so', missing and no known rule to make it

That being said, I browsed through the code some more and while I think it's a great Android project, I don't think (assuming I got it working) it would be advisable for me to build on top of this. The existing complexity, and my lack of faith on cross-compatibility (different phones, SDK updates, etc) are a turn off. Heck I've even seen certain libraries and includes fail because they require different versions of Java/JDK that I have available.

So in summary, I think the solution for myself at least for now, will be to explore a different hardware route. A cheap raspberry pi equivalent, with a small display, and battery - annoying to have all these extra components but at least I know it'll work reliably.

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rasz 699 days ago
>got this cryptic error:

> 'lib/libjpeg.so' missing

whats cryptic about that?

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WkndTriathlete 698 days ago
I get the sense that the only development environment the OP knows at all is Python. With that perspective I understand why they might think that error is cryptic.
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skydhash 698 days ago
People keeps forgetting that pretty much everything is C-based and only a few language ecosystems have abstracted it away enough. And even then, if you want to program in slightly esoteric environment, you have to confront that fact. Just understanding how C/C++ projects are used (libraries, header file, linking,...) can get you really far if you have to stray from the happy path.
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clumsysmurf 699 days ago
Don't forget Android 15 changes pagesize from 4K to 16K, and you have to recompile those ...

https://developer.android.com/about/versions/15/behavior-cha...

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ssahoo 699 days ago
It's not that awful once you get hang of it, but it's a mess made by google. Kotlin which is maintained Jetbrain is catching up. Google is far less interested in owning kotlin. Therefore creating a confusion with mix of grovy, maven, java and xml as hell.
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