No instructions on building for Android or iOS under examples/mobile

[steven-johnson]

There is no README indicating how to build/run a binary on either iOS or Android; as of today, how to do this is not clear, and apparently-obvious answers like cargo apk run fail with obscure errors. Any guidelines for how to get the equivalent of "Hello World" for Bevy running on-device would be appreciated.

[mockersf]

the readme is one level above: https://github.com/bevyengine/bevy/blob/main/examples/README.md#platform-specific-examples

it could be linked in the mobile folder to help discovery

as a side note, cargo-apk is considered deprecated now, so it's not used anymore...

[cirocavani]

I started with the current documentation and example code for Android. Now I have a working draft of zero to adb install on a device. I was not able to make it work on the emulator, but it works on the device. I will work on it again later.

https://github.com/cirocavani/smartrobot-bevy/blob/main/dev-book/bevy-quick-start.md#android

let me know if it make sense.

[steven-johnson]

Thanks for the link -- but I'm really hoping to get this working with either [deprecated but maybe still works?] cargo apk or cargo xbuild because they claim to have the promise of a simple, all-Rust approach that doesn't require dealing with Gradle or Android Studio or any other fluff -- just a text editor and a command line :-). I gather that you can make this work with cargo ndk and a bunch of scripting (as @cirocavani did) but I'm hoping to avoid that stuff if it's avoidable.

If anyone has more concrete examples of using either of these tools (or, conversely, concrete evidence that they won't work and this is a waste of time), I'd appreciate it.

[mockersf]

cargo-apk is deprecated and doesn't support GameActivity on Android. It can still be used, see this note that links to this example: https://github.com/bevyengine/bevy/tree/main/examples/mobile/android_basic

xbuild is not very alive as a project, and we couldn't get Bevy to work on Android with it.

[steven-johnson]

@mockersf Thanks so much for this helpful response! So I guess at this point, using cargo-ndk + Android Studio is the only practical solution... this makes me sad (Gradle, ick) but at least I won't spin my wheels any more :-)