Create an Android build

[tophyr]

Pull Request Type

• [x] GitHub Workflow changes
• [x] Documentation or Wiki changes
• [x] Build and Dependency changes
• [x] Runtime changes
  • [ ] Render changes
  • [ ] Audio changes
  • [ ] Input changes
  • [ ] Network changes
  • [x] Other changes

Description

Adds Android as a supported platform. Uses Gradle to perform the build overall.

Checklist

• [x] I have tested my changes locally and verified that they work as intended.
• [x] I have documented any new or modified functionality.
• [x] I have reviewed the changes to ensure they do not introduce any unnecessary complexity or duplicate code.
• [x] I understand that by submitting this pull request, I am agreeing to license my contributions under the project's license.

[Lgt2x]

Just a suggestion... You can add the __LINUX__ define for android platforms instead of adding it to every check

[tophyr]

Just a suggestion... You can add the __LINUX__ define for android platforms instead of adding it to every check

SDL specifically undefines __LINUX__ when ANDROID is defined, unfortunately.

[tophyr]

Ready for review.

Includes https://github.com/DescentDevelopers/Descent3/pull/493, https://github.com/DescentDevelopers/Descent3/pull/492, https://github.com/DescentDevelopers/Descent3/pull/469, and https://github.com/DescentDevelopers/Descent3/pull/465 as dependencies (see merge commit at base). Those PRs should be reviewed and merged prior to this one; marking this PR as a draft until then.

[tophyr]

@Lgt2x this is finally ready! The game builds, has a mechanism to easily (and legally) put gamedata on the device, and will start up a level.

There's still a fair bit of work to do in order get the game playable, but at this point I think it's stable enough to start relying on build signals from GitHub CI.

Do note that this now PR includes the ExternalProject change from #465.

[Lgt2x]

Overall this is a pretty large and impactful port, I will need time before deciding whether to merge it. I especially want to make sure that I'm able to build, run and debug it, so I can independently fix the build ~if~ when it will break, with the goal of making it more sustainable. I'm not familiar at all with Java and Android, so wish me luck with that Android Studio thingy :)

[tophyr]

Sounds like you've managed to build and run it, at least! Hit me up with any questions about this specifically or Android development in general.