Slide 1
Slide 1 text
Get started with Kotlin
Multiplatform Mobile
2021.03.05 YUMEMI.apk #3
Hiroyuki Kusu ( @hkusu_ )
Slide 2
Slide 2 text
About me
Slide 3
Slide 3 text
https://blog.jetbrains.com/ja/kotlin/2020/09/kotlin-multiplatform-mobile-goes-alpha-ja/
Slide 4
Slide 4 text
https://kotlinlang.org/docs/mobile/home.html
KMM ͷυΩϡϝϯτ
Slide 5
Slide 5 text
Android Studio ༻ͷϓϥάΠϯ
Slide 6
Slide 6 text
৽ن KMM ϓϩδΣΫτ࡞༻ͷςϯϓϨʔτ
Slide 7
Slide 7 text
KMMϓϩδΣΫτͷܗ͕࡞͞ΕΔ
Slide 8
Slide 8 text
https://github.com/hkusu/KmmSampleApp
؆୯ͳαϯϓϧΛ࡞ͬͯΈͨ
Slide 9
Slide 9 text
6TF$BTF
3FQPTJUPSZ
"QJ
%BUB$MBTT
"DUJWJUZ
7JFX.PEFM
BOESPJE"QQ
JPT"QQ
※ ࠓճݕূͰ͖͍ͯ·ͤΜ
(JU)VC"1*
TIBSFE
Slide 10
Slide 10 text
• ಈ࡞֬ೝͨ͠ϩʔΧϧڥ
• Android Studio 4.1.2
• Android Studio Plugin
• Kotlin: 1.4.31-release-Studio4.1-1
• Kotlin Multiplatform Mobile: 0.2.0-release-65-Studio4.1
• ϏϧυπʔϧϥΠϒϥϦͷόʔδϣϯ GitHub ͷίʔυͷํΛΈ͍ͯͩ͘͞
Slide 11
Slide 11 text
plugins {
// ...
id("kotlinx-serialization")
}
kotlin {
// ...
sourceSets {
val commonMain by getting {
dependencies {
// ...
implementation("org.jetbrains.kotlinx:kotlinx-coroutines-core:1.4.2")
implementation("org.jetbrains.kotlinx:kotlinx-serialization-json:1.1.0")
implementation("io.ktor:ktor-client-core:1.5.2")
implementation("io.ktor:ktor-client-serialization:1.5.2")
}
}
// ...
val androidMain by getting {
dependencies {
// ...
implementation("io.ktor:ktor-client-android:1.5.2")
}
}
// ...
val iosMain by getting {
dependencies {
implementation("io.ktor:ktor-client-ios:1.5.2")
}
}
// ...
}
}
build.gradle.kts
shared
Coroutines + serialization + Ktor ͷಋೖ
※ ਖ਼֬ͳઃఆ GitHub ͷίʔυͷํΛݟ͍ͯͩ͘͞
Slide 12
Slide 12 text
plugins {
// ...
id("kotlin-kapt")
}
kotlin {
// ...
sourceSets {
// ...
val androidMain by getting {
dependencies {
// ...
implementation("com.google.dagger:hilt-android:2.31.2-alpha")
// javax.annotation.Generated ͕ݟ͔ͭΒͳ͍Τϥʔ͕ग़ΔͷͰ..
compileOnly("javax.annotation:javax.annotation-api:1.3.2")
}
}
// ...
}
}
// ref: https://www.reddit.com/r/Kotlin/comments/ack2r6/problem_using_kapt_in_a_multiplatform_project/
dependencies {
"kapt"("com.google.dagger:hilt-android-compiler:2.31.2-alpha")
}
build.gradle.kts
shared
※ ਖ਼֬ͳઃఆ GitHub ͷίʔυͷํΛݟ͍ͯͩ͘͞
Dagger Hilt ͷಋೖ(Androidͷํʹ͚ͩ)
Slide 13
Slide 13 text
buildscript {
repositories {
gradlePluginPortal()
jcenter()
google()
mavenCentral()
}
dependencies {
classpath("org.jetbrains.kotlin:kotlin-gradle-plugin:1.4.30")
classpath("com.android.tools.build:gradle:4.1.2")
classpath("org.jetbrains.kotlin:kotlin-serialization:1.4.30")
classpath("com.google.dagger:hilt-android-gradle-plugin:2.31.2-alpha")
}
}
allprojects {
repositories {
google()
jcenter()
mavenCentral()
}
}
ϓϩδΣΫτϧʔτͷ build.gradle.kts
Slide 14
Slide 14 text
shared/commonMain
Ktor ෦Ҏ֎ී௨ͷ Kotlin + Coroutines ͷίʔυͳͷͰ Ktor ෦͚ͩҎ߱Ͱઆ໌
ڞ௨ιʔε෦
Slide 15
Slide 15 text
internal object Libs {
internal val httpClient: HttpClient by lazy {
HttpClient {
install(JsonFeature) {
serializer = KotlinxSerializer(json = Json {
ignoreUnknownKeys = true
})
}
}
}
}
shared/commonMain
Ktor ͷ HTTP ΫϥΠΞϯτͷੜͱ Kotlin serialization ͷઃఆ
Android/iOS Ͱڞ௨ͷઃఆͰOK
Slide 16
Slide 16 text
internal class GitHubApi(private val httpClient: HttpClient) {
suspend fun getUserList(): List {
return httpClient.get("${BASE_URL}/users")
}
companion object {
private const val BASE_URL = "https://api.github.com"
}
}
shared/commonMain
suspending function ʹରԠ
APIͷఆٛ
Slide 17
Slide 17 text
@Module
@InstallIn(SingletonComponent::class)
internal object Module {
@Provides
fun provideGitHubApi(): GitHubApi {
return GitHubApi(Libs.httpClient)
}
@Provides
@Singleton
fun provideUserRepository(gitHubApi: GitHubApi): UserRepository {
return UserRepositoryImpl(gitHubApi)
}
@Provides
fun provideGetUserUseCase(userRepository: UserRepository): GetUserUseCase {
return GetUserUseCase(userRepository)
}
}
shared/androidMain
Dagger Hilt ͷϞδϡʔϧ
※ commonMain ʹ Dagger ແ͘ίϯετϥΫλΠϯδΣΫγϣϯͰ͖ͳ͍ͷͰ
͜͜ͰΠϯελϯεੜํ๏Λఆٛ
(SharedͷதͷOSผ࣮)
Slide 18
Slide 18 text
plugins {
id("com.android.application")
kotlin("android")
id("kotlin-kapt")
id("dagger.hilt.android.plugin")
}
dependencies {
implementation(project(":shared"))
implementation("org.jetbrains.kotlinx:kotlinx-coroutines-android:1.4.2")
implementation("androidx.appcompat:appcompat:1.2.0")
implementation("androidx.core:core-ktx:1.3.2")
implementation("androidx.activity:activity-ktx:1.2.0")
implementation("androidx.fragment:fragment-ktx:1.3.0")
implementation("androidx.lifecycle:lifecycle-viewmodel-ktx:2.3.0")
implementation("androidx.lifecycle:lifecycle-livedata-ktx:2.3.0")
implementation("androidx.constraintlayout:constraintlayout:2.0.4")
implementation("com.google.android.material:material:1.3.0")
implementation("com.google.dagger:hilt-android:2.31.2-alpha")
kapt("com.google.dagger:hilt-android-compiler:2.31.2-alpha")
}
android {
compileSdkVersion(29)
// ...
build.gradle.kts
androidApp
͓ͳ͡ΈͷϥΠϒϥϦୡ
Slide 19
Slide 19 text
plugins {
id("com.android.application")
kotlin("android")
id("kotlin-kapt")
id("dagger.hilt.android.plugin")
}
dependencies {
implementation(project(":shared"))
implementation("org.jetbrains.kotlinx:kotlinx-coroutines-android:1.4.2")
implementation("androidx.appcompat:appcompat:1.2.0")
implementation("androidx.core:core-ktx:1.3.2")
implementation("androidx.activity:activity-ktx:1.2.0")
implementation("androidx.fragment:fragment-ktx:1.3.0")
implementation("androidx.lifecycle:lifecycle-viewmodel-ktx:2.3.0")
implementation("androidx.lifecycle:lifecycle-livedata-ktx:2.3.0")
implementation("androidx.constraintlayout:constraintlayout:2.0.4")
implementation("com.google.android.material:material:1.3.0")
implementation("com.google.dagger:hilt-android:2.31.2-alpha")
kapt("com.google.dagger:hilt-android-compiler:2.31.2-alpha")
}
android {
compileSdkVersion(29)
// ...
build.gradle.kts
androidApp
Dagger Hilt
Slide 20
Slide 20 text
@HiltViewModel
class MainViewModel @Inject constructor(getUser: GetUserUseCase) : ViewModel() {
private val _userList: MutableLiveData> = MutableLiveData()
val userList = _userList as LiveData>
init {
viewModelScope.launch {
_userList.value = getUser()
}
}
}
ViewModel
androidApp
Dagger Hilt
Slide 21
Slide 21 text
@HiltViewModel
class MainViewModel @Inject constructor(getUser: GetUserUseCase) : ViewModel() {
private val _userList: MutableLiveData> = MutableLiveData()
val userList = _userList as LiveData>
init {
viewModelScope.launch {
_userList.value = getUser()
}
}
}
ViewModel
androidApp
shared ʹஔ͍ͨ UseCase Λ inject
Slide 22
Slide 22 text
• Android ෦ʹؔͯ͠ී௨ʹ࡞Εͦ͏
• Android ͔ΒݟΕී௨ͷϚϧνϞδϡʔϧߏ
• ڞ௨ιʔε෦ʹ͍ͭͯ..
• ϚϧνϓϥοτϑΥʔϜରԠͷϥΠϒϥϦΛར༻͢Δඞཁ͕͋Δ
• ͜͜Λ iOS ͚ʹͲ͏ఏڙ͍͔͕ͯ͘͠ϙΠϯτʹͳΓͦ͏
• iOS ͚ʹ DI ͢ΔͳΒ KOIN Kodein Λར༻ͨ͠ํ͕Αͦ͞͏
Slide 23
Slide 23 text
Thank you !
@hkusu_