What's behind BMW Connected?

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Agenda What is Connected? Project structure Technology stack Patterns Team practices

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What is Connected? Personal mobility companion app Journey management Time-to-leave noti cations Personal-assistant features

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What is Connected? Direct access to vehicle features Vehicle location Remote services Vehicle status

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Let's talk about Android

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Project Structure How do we support BMW, MINI, Rolls Royce, BMW Motorrad... only maintaining one code base?

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Library project

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Library Contains almost all JAVA code Unit tests 3rd party libraries Dependency Injection

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App UI Theming Spece c con gurations Product avors + build types Espresso tests

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Bene ts Write once, use everywhere Bug xes are solved in all brands at the same time Focus on features, not on maintenance

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Technology Stack JAVA (sorry Kotlin, you're not fully supported by Google ðŸ˜ž) RxJava + RxAndroid Dagger 2 Retro t + OkHttp DBFlow Calligraphy Mockito

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Patterns Pragmatic MVVM (Model View ViewModel) Dependency Injection Unit tests (100% coverage in POJO les)

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Pragmatic MVVM?

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Pragmatic MVVM Not using Android's Data Binding Not ready for prime time yet Try to use RxJava as much as we can, but... Sometimes declarative programming is easier to understand and, therfore, maintain Sometimes it feels like MVP (Model View Presenter)

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Dependency Injection In Android classes -> eld injection In POJO classes -> constructor injection Easier to test and setup Mock dependencies Heavy use of interfaces Provide different implementations based on context/brand/settings...

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Unit tests ~2500 tests in less than a minute We love Mockito We love less PowerMockito Helpful for mocking 3rd party dependencies Jenkins builds every opened pull requests and runs all the tests Lint checks for missing translations, styling...

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Team Practices

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Team Practices 1-week sprints Freedom to grab anything from the board 90% of the time working on Android 10% working on backend Weekly worldwide demos

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Team practices Weekly technology reviews http://androidweekly.net/ Team culture is really important to us Collaboration with teams in Chicago, Munich and Shanghai