Lightning talk about adding Flutter to an existent Android App

Talk prepared for the Frontend ADL meetup in Adelaide/Australia. Showcasing the feature to add a Flutter module to an existing Android app.
This leads to a lot of doubts on how to add Flutter to an app that is in production, the lightning talk (10 min) just cover that happy path from the documentation https://flutter.dev/docs/development/add-to-app. Feel free to reach out for more thoughts on how that can be achieved in real life :) And also if you would like to share some thoughts on that as well.
Twitter: thaisandrade_s

Transcript

1. Add Flutter to existing App Thais Aquino Android/Flutter developer from GDG Adelaide @thaisandrade_s
2. Flutter Flutter is Google’s UI toolkit for building beautiful, natively compiled applications for mobile, web, and desktop from a single codebase.
3. Why add Flutter to existing project? Share code logic between Android and iOS (or other platforms) Don’t have time to rewrite everything Serve a feature in Flutter using A/B or feature flag You already have an app in production
5. Add to App feature Released in version 1.12 Limitations: • Running multiple Flutter instances or running in partial screen views may have undefined behavior • Using Flutter in background mode is still a WIP
6. Add Flutter module to Android project 1. Open existing project 2. New Flutter module wizard 3. Use Flutter Android APIs (to start an activity with Flutter screen for example) 4. Build & Run 5. Attach & Hot Reload https://flutter.dev/docs/development/add-to-app#add-to-android-applications
7. Add Flutter module: Wizard File > New > New Module
9. settings.gradle
10. build.gradle
11. AndroidManifest.xml
12. Starting an Activity Every FlutterActivity creates its own FlutterEngine Delay to warm up the engine You can use a cached engine instead and optimize
13. Example in GitHub github.com/tasaquino/add_flutter_to_app_example
14. What about sharing logic? You can use Platform Channels to communicate between the existing app and the Flutter module. In order to write Dart code for logic and use it in the host app.
16. Thank you @thaisandrade_s speakerdeck.com/thaisaquino