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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 • ଞͷΫϥεͷґଘؔΛݮΒͤΔͨΊɺΫϥε͝ ͱͷςετΛॻ͖͘͢ͳΔ • ͍·Θ͍ͨ͠ΠϯελϯεΛ؆୯ʹఆٛͰ͖Δ& ҰݩཧͰ͖Δ • ϘΠϥʔϓϨʔτͳίʔυΛݮΒͤΔ • ContextΛߦّͷྑ͍ํ๏Ͱ֤ΫϥεʹͤΔ
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Constitution • @Inject - ϑΟʔϧυσʔλίϯετϥΫλʹ͚ΔͱରΦϒδΣΫτΛnew͠ͳͯ͘ injectΛݺΜͩλΠϛϯάͰউखʹ࡞ͬͯ͘ΕΔ • Module - new ͍ͨ͠ͷΛఆ͓ٛͯ͘͠ͱ͜Ζ • Component - ֤Moduleಉ࢜ΛͲͷΑ͏ʹඥ͚(ґଘ)ͤ͞Δ͔Λఆٛ͢Δͷ - Moduleಉ͕࢜ࢠؔͱͳΓɺࢠͷModuleࢀরͰ͖Δ • Scope - ComponentΛͲΕ͘Β͍ͷؒੜଘͤ͞Δ͔Λཧ͢Δͷ
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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 ΈΑΓͬͱྑ͍ํ๏Λߟ ͑ͯΈΔ
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ͬͱྑ͍ํ๏Ҋ • Dagger.android֦ுΛͬͯ͞ΒʹϘΠϥʔϓϨʔτίʔ υΛݮΒ͍ͯ͘͠ • ActivityComponent/ModuleͱFragmentComponent/ ModuleΛ͞Βʹݫີʹཧ͢Δ - MainActivityModuleɺSetupActivityModuleɺ RecordActivityModuleͳͲ - RepositoryΫϥε(SwaggerͷΧςΰϦͷཻ)ͱಉ͡ྖҬ Ͱ͚ͨΓͯ͠ྑͦ͞͏
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࣮ࡍʹॻ͍ͯΈͨ
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ଓ͘ɻ (Ϗϧυ௨ͬͨ)
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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 Android֦ுͷ͍ํ - 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 - MultibindingͰComponentΛ៉ྷʹ্͛Δ - http://yuki312.blogspot.com/2017/02/dagger2- multibindingcomponent.html
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Fin.