Menjadi Android Developer Expert - BDT DAY 2020 -

Transcript

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

6. None

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

15. None

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() } }
22. None

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
28. None
29. None

30. Contact: Instagram: @arif_faizin Medium: @arifaizin Email: arif@dicoding.com