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Understanding Dagger2 ਂ͍͍ษڧձ#8 Fuji

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What’s Dagger2, why use it? • DI (Dependency Injection) Library • Easy to test • Manage Lifecycle • Module sharing, reusing, replacing • Auto code generating with annotation • Ikeike, Cool, Kacchoiiiiiiiiiii

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Կ͕ศརʁ • ଞͷΫϥεͷґଘؔ܎ΛݮΒͤΔͨΊɺΫϥε͝ ͱͷςετΛॻ͖΍͘͢ͳΔ • ࢖͍·Θ͍ͨ͠ΠϯελϯεΛ؆୯ʹఆٛͰ͖Δ& Ұݩ؅ཧͰ͖Δ • ϘΠϥʔϓϨʔτͳίʔυΛݮΒͤΔ • ContextΛߦّͷྑ͍ํ๏Ͱ֤Ϋϥεʹ౉ͤΔ

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Constitution • @Inject
 - ϑΟʔϧυσʔλ΍ίϯετϥΫλʹ෇͚Δͱର৅ΦϒδΣΫτΛnew͠ͳͯ͘ ΋injectΛݺΜͩλΠϛϯάͰউखʹ࡞ͬͯ͘ΕΔ • Module
 - new ͍ͨ͠΋ͷΛఆ͓ٛͯ͘͠ͱ͜Ζ • Component
 - ֤Moduleಉ࢜ΛͲͷΑ͏ʹඥ෇͚(ґଘ)ͤ͞Δ͔Λఆٛ͢Δ΋ͷ
 - Moduleಉ͕࢜਌ࢠؔ܎ͱͳΓɺࢠ͸਌ͷModule΋ࢀরͰ͖Δ • Scope
 - ComponentΛͲΕ͘Β͍ͷؒੜଘͤ͞Δ͔Λ؅ཧ͢Δ΋ͷ

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Component & Module & Scope

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͞Βʹࡉ͔͘ʂ

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Jake͞ΜͷεϥΠυ͕Θ͔Γ ΍͍͢ͷͰҠಈʂ

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Ͳ͏͍͏෩ʹΦϒδΣΫτ͕ ΠϯδΣΫτ͞Ε͍ͯ͘ͷ͔

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΋͏গ͠ࡉ͔͘ʂ

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Jake͞ΜͷεϥΠυ͕Θ͔Γ ΍͍͢ͷͰҠಈύʔτ2ʂ

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طଘͷnanaͷDaggerͷ࢓૊ ΈΑΓ΋΋ͬͱྑ͍ํ๏Λߟ ͑ͯΈΔ

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΋ͬͱྑ͍ํ๏Ҋ • Dagger.android֦ுΛ࢖ͬͯ͞ΒʹϘΠϥʔϓϨʔτίʔ υΛݮΒ͍ͯ͘͠ • ActivityComponent/ModuleͱFragmentComponent/ ModuleΛ͞Βʹݫີʹ؅ཧ͢Δ
 - MainActivityModuleɺSetupActivityModuleɺ RecordActivityModuleͳͲ
 - RepositoryΫϥε(SwaggerͷΧςΰϦͷཻ౓)ͱಉ͡ྖҬ Ͱ෼͚ͨΓͯ͠΋ྑͦ͞͏

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࣮ࡍʹॻ͍ͯΈͨ

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ଓ͘ɻ
 (Ϗϧυ͸௨ͬͨ)

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References • Dagger2 ೖ໳ղઆ
 - https://qiita.com/MoyuruAizawa/items/ 26cb093adbc778013467 • Dependency Injection with Dagger2
 - https://jakewharton.com/dependency-injection-with-dagger-2/ • Dagger Android֦ுͷ࢖͍ํ
 - https://medium.com/@star_zero/dagger- android%E6%8B%A1%E5%BC%B5%E3%81%AE%E4%BD%BF %E3%81%84%E6%96%B9-6527dcb74531

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Next Steps • Helping Dagger Help You
 - https://jakewharton.com/helping-dagger-help-you/ • Dagger2 - Subcomponent vs dependencies
 - http://yuki312.blogspot.com/2016/02/android- dagger2-subcomponent-vs.html • Dagger2 - MultibindingͰComponentΛ៉ྷʹ࢓্͛Δ
 - http://yuki312.blogspot.com/2017/02/dagger2- multibindingcomponent.html

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Fin.