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「Android/kotlin/DaggerHilt」の版間の差分

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(同じ利用者による、間の4版が非表示)
行1: 行1:
==サンプル==
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[[android/kotlin/DaggerHilt/基本]]
プロジェクト直のbuild.gradleに以下追加
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<pre>
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buildscript {
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    dependencies {
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        classpath "com.android.tools.build:gradle:4.1.1"
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        classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
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        def dagger_hilt_version = "2.31-alpha"
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        classpath "com.google.dagger:hilt-android-gradle-plugin:${dagger_hilt_version}"
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    }
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}
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</pre>
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app/build.gradleに以下追加
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[[android/kotlin/DaggerHilt/バージョンアップ]]
<pre>
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plugins {
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    id 'kotlin-kapt'
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    id 'dagger.hilt.android.plugin'
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}
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dependencies {
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    def dagger_hilt_version = "2.31.2-alpha"
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    implementation "com.google.dagger:hilt-android:${dagger_hilt_version}"
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    kapt "com.google.dagger:hilt-android-compiler:${dagger_hilt_version}"
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    def dagger_hilt_view_model_version = "1.0.0-alpha03"
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    implementation "androidx.hilt:hilt-lifecycle-viewmodel:${dagger_hilt_view_model_version}"
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    kapt "androidx.hilt:hilt-compiler:${dagger_hilt_view_model_version}"
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}
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</pre>
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applicationを追加
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MainApplication.kt
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<pre>
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import android.app.Application
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import dagger.hilt.android.HiltAndroidApp
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@HiltAndroidApp
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class MainApplication : Application()
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</pre>
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AndoridManifest.xml のandroid:nameにpathを追加
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<pre>
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<?xml version="1.0" encoding="utf-8"?>
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<manifest xmlns:android="http://schemas.android.com/apk/res/android"
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    package="com.example.daggerhiltapplication">
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    <application
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        android:name="com.example.daggerhiltapplication.MainApplication"
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</pre>
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MainActivity.kt
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<pre>
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import androidx.appcompat.app.AppCompatActivity
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import android.os.Bundle
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import dagger.hilt.android.AndroidEntryPoint
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import javax.inject.Inject
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@AndroidEntryPoint
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class MainActivity : AppCompatActivity() {
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    @Inject
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    lateinit var usecase: HogeUsecase
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    override fun onCreate(savedInstanceState: Bundle?) {
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        super.onCreate(savedInstanceState)
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        setContentView(R.layout.activity_main)
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        Log.v("MainActivity", "onCreate!!")
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        usecase.print("MainActivity", "usecase.print!!")
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    }
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}
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</pre>
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サービスとユースケースの読み込みモジュール
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ApplicationBindsModule.kt
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<pre>
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import dagger.Binds
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import dagger.Module
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import dagger.hilt.InstallIn
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import dagger.hilt.components.SingletonComponent
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@Module
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@InstallIn(SingletonComponent::class)
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abstract class ApplicationBindsModule {
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    @Binds
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    abstract fun bindHogeService(hogeServiceImpl: HogeServiceImpl) : HogeService
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}
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</pre>
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ApplicationProvidesModule.kt
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<pre>
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import dagger.Module
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import dagger.Provides
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import dagger.hilt.InstallIn
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import dagger.hilt.components.SingletonComponent
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@Module
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@InstallIn(SingletonComponent::class)
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object ApplicationProvidesModule {
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    @Provides
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    fun provideHogeUseCase(hogeService: HogeService) : HogeUsecase {
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        Log.v("ApplicationProvides", "provideHogeUseCase!!")
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        return HogeUsecase(hogeService)
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    }
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}
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</pre>
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HogeService.kt
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<pre>
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import android.util.Log
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import javax.inject.Inject
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interface HogeService {
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    fun print(tag: String, message: String)
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}
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class HogeServiceImpl @Inject constructor(): HogeService {
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    override fun print(tag: String, message: String) {
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        Log.v("HogeServiceImpl", "print!! tag=$tag message=$message")
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    }
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}
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</pre>
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HogeUsecase.kt
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<pre>
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import javax.inject.Inject
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class HogeUsecase @Inject constructor(private val service: HogeService) {
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    fun print(tag: String, message: String) {
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        Log.v("HogeUsecase", "print!! tag=$tag message=$message")
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        service.print(tag, message)
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    }
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}
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</pre>
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出力
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<pre>
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V/ApplicationProvides: provideHogeUseCase!!
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V/MainActivity: onCreate!!
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V/HogeUsecase: print!! tag=MainActivity message=usecase.print!!
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V/HogeServiceImpl: print!! tag=MainActivity message=usecase.print!!
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</pre>
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==MainViewModelを追加==
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app/build.gradle
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<pre>
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dependencies {
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    implementation "androidx.activity:activity-ktx:1.1.0"
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}
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</pre>
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MainViewModel.kt
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<pre>
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import androidx.lifecycle.SavedStateHandle
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import androidx.lifecycle.ViewModel
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import dagger.hilt.android.lifecycle.HiltViewModel
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import javax.inject.Inject
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@HiltViewModel
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class MainViewModel @Inject constructor(
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        private val savedState: SavedStateHandle,
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        private val usecase: HogeUsecase
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): ViewModel() {
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    fun print() {
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        usecase.print("MainViewModel", "print")
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    }
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}
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</pre>
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MainActivity.ktを改修
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<pre>
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import androidx.appcompat.app.AppCompatActivity
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import android.os.Bundle
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import android.util.Log
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import androidx.activity.viewModels
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import dagger.hilt.android.AndroidEntryPoint
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import javax.inject.Inject
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@AndroidEntryPoint
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class MainActivity : AppCompatActivity() {
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    @Inject
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    lateinit var usecase: HogeUsecase
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    private val mainViewModel: MainViewModel by viewModels()
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    override fun onCreate(savedInstanceState: Bundle?) {
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        super.onCreate(savedInstanceState)
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        setContentView(R.layout.activity_main)
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        Log.v("MainActivity", "onCreate!!")
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        usecase.print("MainActivity", "usecase.print!!")
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        mainViewModel.print()
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    }
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}
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</pre>
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==参考==
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https://medium.com/kaleidot725/%E8%A9%B1%E9%A1%8C%E3%81%AE-dagger-hilt-%E3%82%92%E4%BD%BF%E3%81%A3%E3%81%A6%E3%81%BF%E3%81%9F-13acab8163e0
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2021年3月31日 (水) 15:07時点における最新版

android/kotlin/DaggerHilt/基本

android/kotlin/DaggerHilt/バージョンアップ