Add android support

[k3yss]

This PR adds Android support to devenv.

This integration works with the latest channel, but creating an AVD through android studio is not possible (Use CLI for this). To try out this PR, you need to change the devenv input to github:k3yss/work/keys/android-support?dir=src/modules in your devenv.yaml file.

devenv.yaml

inputs:
  devenv:
    url: path: github:k3yss/work/keys/android-support?dir=src/modules
allowUnfree: true

After enabling the input, you can add android.enable=true in your devenv.nix file.

devenv.nix

{ ... }:

{
  android.enable = true;
 
 #to use flutter we can do:
 android.flutter.enable = true;

 #to use react-native we can do:
 android.reactNative.enable = true; 
}

You should have an base working Android environment ready.

Below are a few working screenshots:

Android Emulator working:

React Native working:

Flutter on android working:

Flutter on linux working:

TODO

• Test with React Native
• Test with flutter
• Add example
• Make options modular
• Make sure emulator works

Fixes #310

[k3yss]

Ready for review : )
cc @domenkozar @sandydoo

[numinit]

We are about to get better AVD support with android studio: NixOS/nixpkgs#315233

Edit: Howdy from nixpkgs! 👋 I was responsible for the refactor of androidenv in nixpkgs to make my life at work on a professional Android product easier. If anything is amiss, I can try to solve it.

[k3yss]

Hey @numinit , thanks for the information, I have been patiently following the PR. One issue that users currently face is the creation of an emulator from Android Studio, I tried playing around with various env variables to come up with a potential fix for it but was unsuccessful. Did you manage to come up with a solution for it or do we expect the user to create emulators via avdmanager tool?

[numinit]

@k3yss The trick I've found is twofold: the wrapper makes new projects default their sdk.dir to the androidenv composition, but you still need the sdk.dir (and possibly ndk.dir) in your local.properties. Any new AVDs created with Android Studio work fine if this is true.

[k3yss]

@numinit What worked for me is:
1: Create a AVD using the CLI command.
2: Open the project in android studio.
3: Run the start command.

• In case of react-native I did npm run android from the terminal which worked!

What I wanted to ask if it was possible to do step 1 using android studio.

[numinit]

It is possible to do step 1 in Android Studio. It's a little counterintuitive though, you need a project open with sdk.dir set properly for it to work right.

[k3yss]

@numinit I think I already have that configured, let's do a merge in the current state and wait for reviews.

[k3yss]

@domenkozar can you try the flutter configuration. I have some configuration issues with home manager.

[k3yss]

flutter seems to be broken, investigating.

[k3yss]

Everything works as expected for now, hope I didn't miss something 🤞