multi-module dagger

app/build.gradle

@@ -22,6 +22,9 @@ android {
 }
 
 dependencies {
+    implementation project(path: ':core')
+    implementation project(path: ':mymodule')
+
     implementation fileTree(dir: 'libs', include: ['*.jar'])
     implementation"org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
 

app/src/main/AndroidManifest.xml

@@ -8,6 +8,7 @@
         android:label="@string/app_name"
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="true"
+        android:name="com.marcosholgado.MyApplication"
         android:theme="@style/AppTheme">
         <activity android:name=".MainActivity">
             <intent-filter>
@@ -16,6 +17,8 @@
                 <category android:name="android.intent.category.LAUNCHER" />
             </intent-filter>
         </activity>
+
+        <activity android:name="com.marcosholgado.mymodule.OtherActivity" />
     </application>
 
 </manifest>

app/src/main/java/com/marcosholgado/MyApplication.kt

@@ -0,0 +1,20 @@
+package com.marcosholgado
+
+import android.app.Application
+import com.marcosholgado.core.di.CoreComponentProvider
+import com.marcosholgado.daggerplayground.di.CoreComponent
+import com.marcosholgado.daggerplayground.di.DaggerCoreComponent
+
+class MyApplication : Application(), CoreComponentProvider {
+
+    private lateinit var coreComponent: CoreComponent
+
+    override fun provideCoreComponent(): CoreComponent {
+        if (!this::coreComponent.isInitialized) {
+            coreComponent = DaggerCoreComponent
+                .builder()
+                .build()
+        }
+        return coreComponent
+    }
+}

app/src/main/java/com/marcosholgado/daggerplayground/MainActivity.kt

@@ -1,26 +1,32 @@
 package com.marcosholgado.daggerplayground
 
+import android.content.Intent
 import android.os.Bundle
 import androidx.appcompat.app.AppCompatActivity
-import com.marcosholgado.daggerplayground.di.DaggerMainComponent
-import com.marcosholgado.daggerplayground.di.MyModule
-import dagger.Lazy
+import com.marcosholgado.core.ExpensiveObject
+import com.marcosholgado.core.di.CoreInjectHelper
+import com.marcosholgado.daggerplayground.di.DaggerFeature2Component
+import com.marcosholgado.mymodule.OtherActivity
 import kotlinx.android.synthetic.main.activity_main.*
 import javax.inject.Inject
 
 class MainActivity : AppCompatActivity() {
 
     @Inject
-    lateinit var expensiveObject: Lazy<ExpensiveObject>
+    lateinit var expensiveObject: ExpensiveObject
 
     override fun onCreate(savedInstanceState: Bundle?) {
         super.onCreate(savedInstanceState)
         setContentView(R.layout.activity_main)
 
-        DaggerMainComponent.builder().myModule(MyModule()).build().inject(this)
+        DaggerFeature2Component
+            .builder()
+            .coreComponent(CoreInjectHelper.provideCoreComponent(applicationContext))
+            .build()
+            .inject(this)
 
         button.setOnClickListener {
-            textView.text = "Size is ${expensiveObject.get().intArray?.size}"
+            startActivity(Intent(this, OtherActivity::class.java))
         }
     }
 }

app/src/main/java/com/marcosholgado/daggerplayground/di/Feature2Component.kt

@@ -0,0 +1,11 @@
+package com.marcosholgado.daggerplayground.di
+
+import com.marcosholgado.core.di.FeatureScope
+import com.marcosholgado.daggerplayground.MainActivity
+import dagger.Component
+
+@Component(modules = [Feature2Module::class], dependencies = [CoreComponent::class])
+@FeatureScope
+interface Feature2Component {
+    fun inject(mainActivity: MainActivity)
+}

app/src/main/java/com/marcosholgado/daggerplayground/di/Feature2Module.kt

@@ -0,0 +1,10 @@
+package com.marcosholgado.daggerplayground.di
+
+import dagger.Module
+import dagger.Provides
+
+@Module
+class Feature2Module {
+    @Provides
+    fun provideInt() = 1
+}

core/.gitignore

@@ -0,0 +1 @@
+/build

core/build.gradle

@@ -0,0 +1,72 @@
+apply plugin: 'com.android.library'
+apply plugin: 'kotlin-android'
+apply plugin: 'kotlin-android-extensions'
+apply plugin: 'kotlin-kapt'
+
+android {
+    compileSdkVersion 28
+
+    defaultConfig {
+        minSdkVersion 23
+        targetSdkVersion 28
+        versionCode 1
+        versionName "1.0"
+
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+
+
+    }
+
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+        }
+    }
+
+}
+
+dependencies {
+    implementation fileTree(dir: 'libs', include: ['*.jar'])
+    implementation"org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
+
+    implementation 'androidx.appcompat:appcompat:1.0.0'
+    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
+    implementation 'androidx.core:core-ktx:1.0.0'
+
+    // Dagger
+    implementation "com.google.dagger:dagger:2.19"
+    implementation "com.google.dagger:dagger-android:2.19"
+    implementation "com.google.dagger:dagger-android-support:2.19"
+
+    kapt "com.google.dagger:dagger-compiler:2.19"
+    kapt "com.google.dagger:dagger-android-processor:2.19"
+
+    testImplementation 'junit:junit:4.12'
+
+    // Core library
+    androidTestImplementation 'androidx.test:core:1.0.0'
+    androidTestUtil 'androidx.test:orchestrator:1.1.0'
+
+    // AndroidJUnitRunner and JUnit Rules
+    androidTestImplementation 'androidx.test:runner:1.1.0'
+    androidTestImplementation 'androidx.test:rules:1.1.0'
+
+    // Assertions
+    androidTestImplementation 'androidx.test.ext:junit:1.0.0'
+    androidTestImplementation 'androidx.test.ext:truth:1.0.0'
+    androidTestImplementation 'com.google.truth:truth:0.42'
+
+    // Espresso dependencies
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.0'
+    androidTestImplementation 'androidx.test.espresso:espresso-contrib:3.1.0'
+    androidTestImplementation 'androidx.test.espresso:espresso-intents:3.1.0'
+    androidTestImplementation 'androidx.test.espresso:espresso-accessibility:3.1.0'
+    androidTestImplementation 'androidx.test.espresso:espresso-web:3.1.0'
+    androidTestImplementation 'androidx.test.espresso.idling:idling-concurrent:3.1.0'
+    androidTestImplementation 'androidx.test.janktesthelper:janktesthelper:1.0.1'
+    androidTestImplementation 'androidx.test.uiautomator:uiautomator:2.2.0'
+
+    androidTestImplementation 'io.reactivex.rxjava2:rxandroid:2.0.2'
+    androidTestImplementation 'io.reactivex.rxjava2:rxjava:2.1.10'
+}

core/proguard-rules.pro

@@ -0,0 +1,21 @@
+# Add project specific ProGuard rules here.
+# You can control the set of applied configuration files using the
+# proguardFiles setting in build.gradle.
+#
+# For more details, see
+#   http://developer.android.com/guide/developing/tools/proguard.html
+
+# If your project uses WebView with JS, uncomment the following
+# and specify the fully qualified class name to the JavaScript interface
+# class:
+#-keepclassmembers class fqcn.of.javascript.interface.for.webview {
+#   public *;
+#}
+
+# Uncomment this to preserve the line number information for
+# debugging stack traces.
+#-keepattributes SourceFile,LineNumberTable
+
+# If you keep the line number information, uncomment this to
+# hide the original source file name.
+#-renamesourcefileattribute SourceFile

core/src/main/AndroidManifest.xml

@@ -0,0 +1,2 @@
+<manifest xmlns:android="http://schemas.android.com/apk/res/android"
+    package="com.marcosholgado.core" />

core/src/main/java/com/marcosholgado/core/ExpensiveObject.kt

@@ -0,0 +1,3 @@
+package com.marcosholgado.core
+
+class ExpensiveObject

core/src/main/java/com/marcosholgado/core/di/CoreComponent.kt

@@ -0,0 +1,11 @@
+package com.marcosholgado.daggerplayground.di
+
+import com.marcosholgado.core.ExpensiveObject
+import dagger.Component
+import javax.inject.Singleton
+
+@Component(modules = [CoreModule::class])
+@Singleton
+interface CoreComponent {
+    fun getExpensiveObject(): ExpensiveObject
+}

core/src/main/java/com/marcosholgado/core/di/CoreComponentProvider.kt

@@ -0,0 +1,7 @@
+package com.marcosholgado.core.di
+
+import com.marcosholgado.daggerplayground.di.CoreComponent
+
+interface CoreComponentProvider {
+    fun provideCoreComponent(): CoreComponent
+}

core/src/main/java/com/marcosholgado/core/di/CoreInjectHelper.kt

@@ -0,0 +1,14 @@
+package com.marcosholgado.core.di
+
+import android.content.Context
+import com.marcosholgado.daggerplayground.di.CoreComponent
+
+object CoreInjectHelper {
+    fun provideCoreComponent(applicationContext: Context): CoreComponent {
+        return if (applicationContext is CoreComponentProvider) {
+            (applicationContext as CoreComponentProvider).provideCoreComponent()
+        } else {
+            throw IllegalStateException("The application context you have passed does not implement CoreComponentProvider")
+        }
+    }
+}

app/src/main/java/com/marcosholgado/daggerplayground/di/MyModule.kt → core/src/main/java/com/marcosholgado/core/di/CoreModule.kt

@@ -1,13 +1,13 @@
 package com.marcosholgado.daggerplayground.di
 
-import com.marcosholgado.daggerplayground.ExpensiveObject
+import com.marcosholgado.core.ExpensiveObject
 import dagger.Module
 import dagger.Provides
+import javax.inject.Singleton
 
 @Module
-class MyModule {
-
+class CoreModule {
     @Provides
+    @Singleton
     fun provideExpensiveObject(): ExpensiveObject = ExpensiveObject()
-
 }

core/src/main/java/com/marcosholgado/core/di/FeatureScope.kt

@@ -0,0 +1,7 @@
+package com.marcosholgado.core.di
+
+import javax.inject.Scope
+
+@Scope
+@Retention
+annotation class FeatureScope

core/src/main/res/values/strings.xml

@@ -0,0 +1,3 @@
+<resources>
+    <string name="app_name">core</string>
+</resources>

mymodule/.gitignore

@@ -0,0 +1 @@
+/build

mymodule/build.gradle

@@ -0,0 +1,73 @@
+apply plugin: 'com.android.library'
+apply plugin: 'kotlin-android'
+apply plugin: 'kotlin-android-extensions'
+apply plugin: 'kotlin-kapt'
+
+android {
+    compileSdkVersion 28
+
+    defaultConfig {
+        minSdkVersion 23
+        targetSdkVersion 28
+        versionCode 1
+        versionName "1.0"
+
+        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
+
+    }
+
+    buildTypes {
+        release {
+            minifyEnabled false
+            proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
+        }
+    }
+
+}
+
+dependencies {
+    implementation project(path: ':core')
+
+    implementation fileTree(dir: 'libs', include: ['*.jar'])
+    implementation"org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
+
+    implementation 'androidx.appcompat:appcompat:1.0.0'
+    implementation 'androidx.constraintlayout:constraintlayout:1.1.3'
+    implementation 'androidx.core:core-ktx:1.0.0'
+
+    // Dagger
+    implementation "com.google.dagger:dagger:2.19"
+    implementation "com.google.dagger:dagger-android:2.19"
+    implementation "com.google.dagger:dagger-android-support:2.19"
+
+    kapt "com.google.dagger:dagger-compiler:2.19"
+    kapt "com.google.dagger:dagger-android-processor:2.19"
+
+    testImplementation 'junit:junit:4.12'
+
+    // Core library
+    androidTestImplementation 'androidx.test:core:1.0.0'
+    androidTestUtil 'androidx.test:orchestrator:1.1.0'
+
+    // AndroidJUnitRunner and JUnit Rules
+    androidTestImplementation 'androidx.test:runner:1.1.0'
+    androidTestImplementation 'androidx.test:rules:1.1.0'
+
+    // Assertions
+    androidTestImplementation 'androidx.test.ext:junit:1.0.0'
+    androidTestImplementation 'androidx.test.ext:truth:1.0.0'
+    androidTestImplementation 'com.google.truth:truth:0.42'
+
+    // Espresso dependencies
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.0'
+    androidTestImplementation 'androidx.test.espresso:espresso-contrib:3.1.0'
+    androidTestImplementation 'androidx.test.espresso:espresso-intents:3.1.0'
+    androidTestImplementation 'androidx.test.espresso:espresso-accessibility:3.1.0'
+    androidTestImplementation 'androidx.test.espresso:espresso-web:3.1.0'
+    androidTestImplementation 'androidx.test.espresso.idling:idling-concurrent:3.1.0'
+    androidTestImplementation 'androidx.test.janktesthelper:janktesthelper:1.0.1'
+    androidTestImplementation 'androidx.test.uiautomator:uiautomator:2.2.0'
+
+    androidTestImplementation 'io.reactivex.rxjava2:rxandroid:2.0.2'
+    androidTestImplementation 'io.reactivex.rxjava2:rxjava:2.1.10'
+}