AirMessage lets people use iMessage on the devices they like. AirMessage for Android is the project's client for Android devices, with an emphasis on feeling like a part of the Android ecosystem. AirMessage for Android can be downloaded from the Google Play Store or from F-Droid.
Other AirMessage repositories: Server | Web | Connect (community)
AirMessage for Android uses RxJava to manage its internal logic. If you're not familiar with RxJava, the repository's README file is a great place to get started:
https://github.com/ReactiveX/RxJava
AirMessage for Android hooks in to Google Cloud and Firebase to utilize services like FCM, Google Maps, and Crashlytics.
The app will not build without a valid configuration, so to get started quickly, you can copy the app/fullRelease/google-services.default.json file to app/fullRelease/google-services.json to use a pre-configured Firebase project, or you may provide your own Firebase configuration file.
Similarly, the app will use the API key found in secrets.default.properties for Google Maps by default, and you can supply your own in secrets.properties.
In order to help developers get started quickly, we host a separate open-source version of AirMessage Connect at connect-open.airmessage.org.
Firebase requires apps to be signed with a designated keystore file in order to enable Google-sign in, so you can copy the signingshared/shared.keystore.disabled file to signingshared/shared.keystore, which will cause Gradle to use this keystore file in debug builds instead of your local one.
Since this version of AirMessage Connect is hosted in a separate environment from official servers, you will have to be running a version of AirMessage Server that also connects to the same server.
We kindly ask that you do not use AirMessage's official Connect servers with any unofficial builds of AirMessage-compatible software.
Thank you for your interest in contributing to AirMessage! You're helping to shape the future of an open, secure messaging market. Should you have any questions, comments, or concerns, please shoot an email to hello@airmessage.org.