1.
Architecture Components
In Real Life
Season 2
@akexorcist
Lovely Android Developer @ Nextzy

2.
Architecture
Component
• Lifecycles
• LiveData
• ViewModel
• Room

3.
Architecture
Component
• Lifecycles
• LiveData
• ViewModel
• Room
• Navigation
• Paging
• ViewModel SavedState
• Data Binding

4.
Dialog Event Listener
Use case

5.
Activity/Fragment
DialogFragment
Normal
CreateEvent Listener

6.
Activity/Fragment
DialogFragment
Activity destroyed then restored
CreateEvent Listener

7.
Activity/Fragment DialogFragment
Handle dialog event with view model
ViewModel

8.
Activity/Fragment DialogFragment
Handle dialog event with view model
ViewModel
Create

9.
Activity/Fragment DialogFragment
Handle dialog event with view model
ViewModel
Event Listener Event Listener

10.
Activity/Fragment DialogFragment
Handle dialog event with view model
Mapper
Event Listener Event Listener
ViewModel
LiveDataLiveData

11.
DialogManager.showConfirm(
message = message,
key = KEY_DELETE_CONFIRMATION,
fragmentManager = supportFragmentManager
)

12.
dialogViewModel.confirmation.observe(this, object : ConfirmDialogListener {
override fun onConfirmButtonClick(key: String?, data: Bundle?) {
when (key) {
KEY_DELETE_CONFIRMATION -> deleteTask(true)
}
}
override fun onCancelButtonClick(key: String?, data: Bundle?) {
}
})

13.
MVVM + Clean Architecture
With Architecture Components

14.
Reason
• Able to write the testable code
• Suitable for write the code with others

15.
Activity/Fragment
ViewModel
Repository
Database Network

16.
Activity/Fragment
ViewModel
UseCase
Database Network
Repository

17.
Data Layer
Presentation Layer
Domain Layer
Activity/Fragment
ViewModel
UseCase
Database Network
Repository

18.
Activity/Fragment
ViewModel
UseCase
Database Network
Repository
UseCaseUseCase

19.
LiveDataLiveDataLiveData
LiveData
Activity/Fragment
ViewModel
UseCase
Database Network
Repository
UseCaseUseCase

20.
class ValidateUsernameUseCase : UseCase<String?, Boolean>() {
override fun execute(parameters: String?): Boolean {
return parameters?.isNotEmpty() ?: false
}
}

21.
class ValidateUsernameUseCase : UseCase<String?, Boolean>() {
override fun execute(parameters: String?): Boolean {
return parameters?.isNotEmpty() ?: false
}
}

22.
class ValidateUsernameUseCase : UseCase<String?, Boolean>() {
override fun execute(parameters: String?): Boolean {
return parameters?.isNotEmpty() ?: false
}
}

23.
class ValidateUsernameUseCase : UseCase<String?, Boolean>() {
override fun execute(parameters: String?): Boolean {
return parameters?.isNotEmpty() ?: false
}
}

24.
class GetProfileUseCase constructor(
private val repository: ProfileRepository
) : MediatorUseCase<GetProfileRequest, String?>() {
override fun execute(parameters: GetProfileRequest) {
result.addSource(repository.getTermCondition(parameters)) { response ->
result.postValue(response)
}
}
}

25.
class GetProfileUseCase constructor(
private val repository: ProfileRepository
) : MediatorUseCase<GetProfileRequest, String?>() {
override fun execute(parameters: GetProfileRequest) {
result.addSource(repository.getTermCondition(parameters)) { response ->
result.postValue(response)
}
}
}

26.
class GetProfileUseCase constructor(
private val repository: ProfileRepository
) : MediatorUseCase<GetProfileRequest, String?>() {
override fun execute(parameters: GetProfileRequest) {
result.addSource(repository.getTermCondition(parameters)) { response ->
result.postValue(response)
}
}
}

27.
class GetProfileUseCase constructor(
private val repository: ProfileRepository
) : MediatorUseCase<GetProfileRequest, String?>() {
override fun execute(parameters: GetProfileRequest) {
result.addSource(repository.getTermCondition(parameters)) { response ->
result.postValue(response)
}
}
}

28.
class ValidateUsernameUseCase : UseCase<String?, Boolean>() {
override fun execute(parameters: String?): Boolean {
return parameters?.isNotEmpty() ?: false
}
}
class GetProfileUseCase constructor(
private val repository: ProfileRepository
) : MediatorUseCase<GetProfileRequest, String?>() {
override fun execute(parameters: GetProfileRequest) {
result.addSource(repository.getTermCondition(parameters)) { response ->
result.postValue(response)
}
}
}
Synchronous Logic
Asynchronous Logic

29.
LiveDataLiveDataLiveData
LiveData
Activity/Fragment
ViewModel
UseCase
Database Network
Repository
UseCaseUseCase

30.
class ValidateUsernameUseCaseTest {
@Before
fun setup() {
MockitoAnnotations.initMocks(this)
}
@Test
fun `Validate the username with normally username - should be true`() {
val useCase = ValidateUsernameUseCase()
val username = "Akexorcist"
val result = useCase.executeNow(username)
Assert.assertTrue(result is Result.Success)
Assert.assertTrue((result as Result.Success).data ?: false)
}
@Test
fun `Validate the username with empty username - should be false`() {
val useCase = ValidateUsernameUseCase()
val username = ""

31.
class ValidateUsernameUseCaseTest {
@Before
fun setup() {
MockitoAnnotations.initMocks(this)
}
@Test
fun `Validate the username with normally username - should be true`() {
val useCase = ValidateUsernameUseCase()
val username = "Akexorcist"
val result = useCase.executeNow(username)
Assert.assertTrue(result is Result.Success)
Assert.assertTrue((result as Result.Success).data ?: false)
}
@Test
fun `Validate the username with empty username - should be false`() {
val useCase = ValidateUsernameUseCase()
val username = ""

32.
Activity/Fragment
ViewModel
UseCase
Database Network
Repository
UseCaseUseCase

33.
Activity/Fragment
ViewModel
UseCase
Database Network
Repository
UseCaseUseCase
Data Layer
Presentation Layer
Domain Layer

34.
Activity/Fragment
ViewModel
UseCase
Database Network
Repository
UseCaseUseCase
Developer A
Developer B

35.
Activity/Fragment
ViewModel
UseCase
Database Network
Repository
UseCaseUseCase
Developer A
Developer B

36.
Activity/Fragment
ViewModel
UseCase
Database Network
Repository
UseCaseUseCase
Developer A
Developer B

37.
Activity/Fragment
ViewModel
UseCase
Database Network
Repository
Data Layer
Presentation Layer
Domain Layer
Navigation
Data Binding
ViewModel SavedState
Coroutine

38.
Activity/Fragment
Paging
Data Layer
Presentation Layer
Domain Layer

39.
Do the
Proof of Concept
every time when you learn
something new

40.
Thank you!
@akexorcist
Lovely Android Developer @ Nextzy