Menjadi Android Developer Expert - BDT DAY 2020 -

How to not only make apps, but how to make good apps with architecture that easy to understand, easy to maintain, and easy to change.
https://youtu.be/60tbLQzS8g4?t=6776

1. Menjadi Android Developer Expert Ahmad Arif Faizin Curriculum Developer - Dicoding Indonesia
2. “Even bad code can function. But if code isn’t clean, it can bring a development organization to its knees.” -Uncle Bob
3. Software Design Principle • Understandable (mudah dipahami) • Maintainable (mudah dikelola) • Flexible (mudah diubah)
4. • Independent of Framework • Testable • Independent of UI • Independent of Database • Independent of External Clean Architecture
5. Clean Architecture Layer
7. Dependency Inversion Principle
8. Reactive Programming Asynchronous Data Stream
9. 3 “o” • observable • observer • operator
10. Chaining Operator
11. Rx Operator
12. Reactive UI
13. Callback vs Rx
14. Reactive Library
16. Dependency Injection (DI)
17. • Without DI class Car { private val engine = Engine() fun start() { engine.start() } } fun main() { val car = Car() car.start() } • With DI class Car(private val engine: Engine){ fun start() { engine.start() } } fun main() { val engine = Engine() val car = Car(engine) car.start() } DI Manual Manual DI
18. DI Library
19. Automated Injection with Koin • Before class MainActivity : AppCompatActivity() { lateinit var engine: Engine override fun onCreate(...) { ... engine = Engine() val car = Car(engine) car.start() } } • After class MainActivity : AppCompatActivity() { val engine: Engine by inject() override fun onCreate(...) { ... val car = Car(engine) car.start() } }
20. Automated Injection with Dagger • Before class MainActivity : AppCompatActivity() { lateinit var engine: Engine override fun onCreate(...) { ... engine = Engine() val car = Car(engine) car.start() } } • After class MainActivity : AppCompatActivity() { @Inject lateinit var engine: Engine override fun onCreate(...) { appComponent.inject(this) ... val car = Car(engine) car.start() } }
21. Automated Injection with Dagger Hilt • Before class MainActivity : AppCompatActivity() { lateinit var engine: Engine override fun onCreate(...) { ... engine = Engine() val car = Car(engine) car.start() } } • After @AndroidEntryPoint class MainActivity : AppCompatActivity() { @Inject lateinit var engine: Engine override fun onCreate(...) { ... val car = Car(engine) car.start() } }
23. Modularization
24. Why Modularization? • Separation of concern • Proses build jadi lebih cepat • Code ownership • Reusability • Lebih aman ketika crash • Batasan yang lebih jelas daripada package • Bisa membuat Instant App dan Dynamic Feature Replace Me! (Bisa ditambahkan dengan image yang relevan)
25. Dynamic Delivery with AAB (Android App Bundle)
26. Dynamic Feature
27. Summary • Ingat Software Design Principle • Pelajari Clean Architecture supaya kode lebih mudah dikembangkan • Pelajari Reactive Programming supaya kode lebih mudah dipahami • Pelajari Dependency Injection supaya kode lebih mudah digunakan kembali • Pelajari Modularization supaya kode lebih mudah dikelola
30. Contact: Instagram: @arif_faizin Medium: @arifaizin Email: arif@dicoding.com