Working feature injection

Author: skywall

app/build.gradle

@@ -49,7 +49,7 @@ android {
 }
 
 dependencies {
-    implementation project(":core")
+    api project(":core")
 
     kapt 'com.google.dagger:dagger-compiler:2.27'
 }

app/src/main/java/cz/skywall/multimoduleexample/App.kt

@@ -1,7 +1,44 @@
 package cz.skywall.multimoduleexample
 
 import android.app.Application
+import android.content.SharedPreferences
+import cz.skywall.multimoduleexample.core.injection.CoreSubcomponent
+import cz.skywall.multimoduleexample.core.injection.DaggerModulesComponent
+import cz.skywall.multimoduleexample.core.mapper.toDB
+import cz.skywall.multimoduleexample.database.UserDao
+import cz.skywall.multimoduleexample.injection.DaggerApplicationComponent
+import cz.skywall.multimoduleexample.network.ApiService
+import kotlinx.coroutines.runBlocking
+import javax.inject.Inject
 
 class App : Application() {
 
+    @Inject lateinit var sharedPreferences: SharedPreferences
+    @Inject lateinit var apiService: ApiService
+    @Inject lateinit var userDao: UserDao
+
+    private val modulesComponent by lazy {
+        DaggerModulesComponent.factory().create()
+    }
+
+    private val applicationComponent by lazy {
+        DaggerApplicationComponent.factory()
+            .create(this, coreSubcomponent)
+    }
+
+    val coreSubcomponent: CoreSubcomponent by lazy {
+        modulesComponent.coreSubcomponentFactory().create(this)
+    }
+
+    override fun onCreate() {
+        super.onCreate()
+
+        applicationComponent.inject(this)
+
+        sharedPreferences.all
+        runBlocking {
+            val user = apiService.getUser()
+            userDao.insertUser(user.toDB())
+        }
+    }
 }

app/src/main/java/cz/skywall/multimoduleexample/injection/ApplicationComponent.kt

@@ -0,0 +1,24 @@
+package cz.skywall.multimoduleexample.injection
+
+import cz.skywall.multimoduleexample.App
+import cz.skywall.multimoduleexample.core.injection.CoreSubcomponent
+import dagger.BindsInstance
+import dagger.Component
+
+@Component(
+    modules = [
+        ApplicationModule::class
+    ],
+    dependencies = [
+        CoreSubcomponent::class
+    ]
+)
+interface ApplicationComponent {
+
+    @Component.Factory
+    interface Factory {
+        fun create(@BindsInstance app: App, coreSubcomponent: CoreSubcomponent): ApplicationComponent
+    }
+
+    fun inject(app: App)
+}

app/src/main/java/cz/skywall/multimoduleexample/injection/ApplicationModule.kt

@@ -0,0 +1,13 @@
+package cz.skywall.multimoduleexample.injection
+
+import android.app.Application
+import android.content.res.Resources
+import dagger.Module
+
+@Module
+class ApplicationModule{
+
+    fun resources(application: Application): Resources {
+        return application.resources
+    }
+}

core/build.gradle

@@ -38,8 +38,8 @@ android {
 }
 
 dependencies {
-    implementation project(":database")
-    implementation project(":network")
+    api project(":database")
+    api project(":network")
 
     kapt 'com.google.dagger:dagger-compiler:2.27'
 }

core/src/main/java/cz/skywall/multimoduleexample/core/injection/CoreModule.kt

@@ -0,0 +1,16 @@
+package cz.skywall.multimoduleexample.core.injection
+
+import android.app.Application
+import android.content.Context
+import android.content.SharedPreferences
+import dagger.Module
+import dagger.Provides
+
+@Module
+class CoreModule {
+
+    @Provides
+    fun sharedPreferences(application: Application): SharedPreferences {
+        return application.getSharedPreferences("sp", Context.MODE_PRIVATE)
+    }
+}

core/src/main/java/cz/skywall/multimoduleexample/core/injection/CoreSubcomponent.kt

@@ -0,0 +1,31 @@
+package cz.skywall.multimoduleexample.core.injection
+
+import android.app.Application
+import android.content.SharedPreferences
+import cz.skywall.multimoduleexample.database.DatabaseModule
+import cz.skywall.multimoduleexample.database.UserDao
+import cz.skywall.multimoduleexample.network.ApiService
+import cz.skywall.multimoduleexample.network.NetworkModule
+import dagger.BindsInstance
+import dagger.Subcomponent
+
+@Subcomponent(
+    modules = [
+        CoreModule::class,
+        DatabaseModule::class,
+        NetworkModule::class
+    ]
+)
+interface CoreSubcomponent {
+
+    @Subcomponent.Factory
+    interface Factory {
+        fun create(@BindsInstance application: Application): CoreSubcomponent
+    }
+
+    fun userDao(): UserDao
+
+    fun apiService(): ApiService
+
+    fun sharedPreference(): SharedPreferences
+}

core/src/main/java/cz/skywall/multimoduleexample/core/injection/ModulesComponent.kt

@@ -0,0 +1,15 @@
+package cz.skywall.multimoduleexample.core.injection
+
+import dagger.Component
+
+@Component
+interface ModulesComponent {
+
+    @Component.Factory
+    interface Factory {
+        fun create(): ModulesComponent
+    }
+
+    fun coreSubcomponentFactory(): CoreSubcomponent.Factory
+
+}

core_dependencies.gradle

@@ -16,4 +16,5 @@ dependencies {
     implementation 'androidx.navigation:navigation-fragment-ktx:2.3.0-alpha05'
 
     api 'com.google.dagger:dagger:2.27'
+    api "com.google.dagger:dagger-android-support:2.27"
 }

database/src/main/java/cz/skywall/multimoduleexample/database/DatabaseModule.kt

@@ -0,0 +1,14 @@
+package cz.skywall.multimoduleexample.database
+
+import android.app.Application
+import dagger.Module
+import dagger.Provides
+
+@Module
+class DatabaseModule {
+
+    @Provides
+    fun userDao(application: Application) : UserDao {
+        return UserDao(application)
+    }
+}