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Dagger2 has been released!
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Masaki Ogata
April 15, 2015
Programming
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Dagger2 has been released!
Migrated story from Dagger1 to Dagger2 in Qiitanium App
Masaki Ogata
April 15, 2015
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Transcript
Dagger 2.0 has been released! at potatotips #16
About me Job $> Android Engineer v0.1 GitHub $> https://github.com/ogaclejapan
Company $> CyberAgent, Inc. Name $> Masaki Ogata (@ogaclejapan)
Qiitanium
http://github.com/ogaclejapan/qiitanium ɾRxJava ɾClean Architecture + MVVMʢࣗশʣ ɾDagger ɾOkHttp
http://github.com/ogaclejapan/qiitanium ɾ ɾ ɾDagger ɾ
http://github.com/ogaclejapan/qiitanium ɾ ɾ ɾDagger 1.x ɾ Dagger 2.0 Migrated!
About Dagger
About Dagger Let me ask Wasabeef !! https://speakerdeck.com/wasabeef/dagger at potatotips
#9
Dagger2.0 Overview
100% Proguard friendly @Generated("dagger.internal.codegen.ComponentProcessor") public final class AppModule_ProvideApplicationFactory implements Factory<Application>
{ private final AppModule module; @Override public Application get() { Application provided = module.provideApplication(); if (provided == null) { throw new NullPointerException("Cannot return null from a non-@Nullable @Provides method"); } return provided; } }
100% Proguard friendly ɾ θϩϦϑϨΫγϣϯ ɾ ࣗಈੜίʔυσόοάτϨʔε͕Մೳ ɾύϑΥʔϚϯε্͕
@Component Dagger1: FeatureModule ObjectGraph SubModule1 SubModule2 SubModule3 load Includes AppModule
plus SubGraph
@Component Dagger1: @Module(includes={Module1.class, …}, injects={…}) public class AppModule { @Provided
public Hoge provideHoge() { return new Hoge(); } } ObjectGraph graph = ObjectGraph.create(new Object[] { new AppModule()}); graph.inject(this); ObjectGraph sub = graph.plus(new FeatureModule());
@Component Dagger2: AppComponent FeatureComponent Module1 Module2 Module3 modules FeatureModule AppModule
modules dependencies
@Component Dagger2: @Component(modules={ AppModule.class, …}) public interface AppComponent { public
void inject(Application app); } @Generated(“…”) public class DaggerAppComponent { //… } Annotation Processor AppComponent component = DaggerAppComponent.builder() .appModule(…).build(); component.inject(this);
Migrate Dagger 1.x to 2.0 (ͦͷұ)
Scope @Module public class Module1 { @Singleton @Provided public Hoge
provideHoge() { return new Hoge(); } } @Component(modules = { Module1.class }) public interface AppComponent { //… }
Error: AppComponent (unscoped) may not reference scoped bindings: @Singleton @Provides
Hoge Compile Error…
Fix @Module public class @Provided public return new } }
@Component(modules = { public interface AppComponent { //… } @Singleton
Custom Scope Component୯ҐͰΠϯελϯεΛཧ͍ͯ͠Δ @Generated(“…”) public final class DaggerAppComponent { //…
private void initialize(final Builder builder) { this.…Provider = ScopedProvider.create(…); } //… } ScopedProviderͰSingleton੍ޚ͕͞Ε͍ͯΔ
Custom Scope @Scope @Retention(RetentionPolicy.RUNTIME) public @interface PerActivity { } @Module(modules={…})
public class ActivityModule { @PerActivity @Provided public Hoge provideHoge() { return new Hoge(); } } Dagger2ͰScopeΛಠࣗʹఆٛͯ͠͏
Migrate Dagger 1.x to 2.0 (ͦͷ್)
Override Module Dagger1: src/debug/java/.. @Module(addsTo=AppModule.class, override=true, …) public class DebugAppModule
{ @Singleton @Provided public Hoge provideHoge() { return new DebugHoge(); } } class Modules { Object[] list() { return ObjectGraph.create(new Object[] { new AppModule(), new DebugAppModule }); } }
Override Module Dagger2: src/debug/java/.. @Module(addsTo=AppModule.class, override=true, …) public class DebugAppModule
{ @Singleton @Provided public Hoge provideHoge() { return new DebugHoge(); } } class Modules { Object[] list() { return ObjectGraph.create(new Object[] { new AppModule(), new DebugAppModule }); } }
Override Module Dagger2: src/debug/java/.. @Module(addsTo=AppModule.class, override=true, …) public class DebugAppModule
extends AppModule { @Singleton @Provided public Hoge provideHoge() { return new DebugHoge(); } } class Modules { Object[] list() { return ObjectGraph.create(new Object[] { new AppModule(), new DebugAppModule }); } }
Override Module Dagger2: src/debug/java/.. @Module(addsTo=AppModule.class, override=true, …) public class DebugAppModule
extends AppModule { @Singleton @Provided @Override public Hoge provideHoge() { return new DebugHoge(); } } class Modules { Object[] list() { return ObjectGraph.create(new Object[] { new AppModule(), new DebugAppModule }); } }
Override Module Dagger2: src/debug/java/.. @Module(addsTo=AppModule.class, override=true, …) public class DebugAppModule
extends AppModule { @Singleton @Provided @Override public Hoge provideHoge() { return new DebugHoge(); } } class Modules { Object[] list() { return ObjectGraph.create(new Object[] { new AppModule(), new DebugAppModule }); } }
Override Module Dagger2: src/debug/java/.. @Module(addsTo=AppModule.class, override=true, …) public class DebugAppModule
extends AppModule { @Singleton @Provided @Override public Hoge provideHoge() { return new DebugHoge(); } } class Modules { AppModule appModule() { return new DebugAppModule(); } }
Override Module Dagger2: src/main/java/.. public class MyApplication extends Application {
@Inject Hoge mHoge; @Override public void onCreate() { AppComponent component = DaggerAppComponent.builder() .appModule(Modules.appModule()) .build(); component.inject(this); System.out.println(mHoge instanceof DebugHoge); //true } }
Let’s enjoy Dagger2 !!
͝੩ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠ m(_ _)m