Baparekraf Digital Talent Day: Monitoring dan Coaching Penerima Fasilitasi BDT TA 2020 Android Session Nama materi: Menjadi Android Developer Expert Narasumber: Ahmad Arif Faizin (Google Associate Android Developer, Curriculum Developer Dicoding)

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