Android Architecture Componentsをメルカリカウルに入れてみた話

by protosd

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Android Architecture Components ΛϝϧΧϦ Χ΢ϧʹೖΕͯΈͨ࿩ גࣜձࣾι΢κ΢Ֆ഼࿨໵

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Souzoh confidential and proprietary ࣗݾ঺հ w ໊લՖ഼࿨໵ ͸ͨʹΌΜ w ৬छ"OESPJEΤϯδχΞܾಆऀ w ॴଐϝϧΧϦι΢κ΢ w (JUΞΧ΢ϯτQSPUPTEIL 2

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Souzoh confidential and proprietary 3

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Souzoh confidential and proprietary Android Architecture Components 4

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Souzoh confidential and proprietary Android Architecture Components 5 • Lifecycle  Activity/Fragmentͱಉظͯ͠ঢ়ଶ͝ͱʹॲཧΛࠩ͠ࠐΊΔ • LiveData  Activity/Fragment ͕ੜଘ͍ͯ͠Δ৔߹ʹͷΈσʔλΛྲྀͯ͘͠ΕΔ • ViewModel  ը໘ճస࣌ʹActivity/Fragment ͕࠶ੜ੒͞Εͯ΋σʔλΛҾ͖ܧ͛Δ • Room  SQLite ͷ Object Mapper

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Souzoh confidential and proprietary ϝϧΧϦΧ΢ϧͷߏ੒ 6 w .71 w 3Y+BWB Activity / Fragment Presenter onCreate onDestroy Viewͷొ࿥ CompositeDisposable.add CompositeDisposable.dispose Viewͷදࣔ etc

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Souzoh confidential and proprietary Lifecycle 7

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Souzoh confidential and proprietary Lifecycle 8 w 1SFTFOUFSͷվम w "DUJWJUZ'SBHNFOUͷվम

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Souzoh confidential and proprietary Lifecycle 9 w ಋೖʹ͓͚ΔϝϦοτ w .71Ͱ͸ಉ͡Α͏ͳ໾ׂΛ࣋ͭ1SFTFOUFS͕طʹଘࡏ͍ͯ͠ΔͷͰมߋ͕؆୯ w ຖճϥΠϑαΠΫϧܥͷϝιουͰ1SFTFOUFSΛݺͼग़͢ॲཧ͔Β։์ w ؾΛ͚͍ͭͨϙΠϯτ w 'SBHNFOU"DUJWJUZͱ1SFTFOUFSʹը໘ͷঢ়ଶύϥϝʔλ͕෼ࢄͯ͠͠·͍ͬͯ Δ৔߹ͳͲ͸7JFX㱻1SFTFOUFSؒͷແବͳ΍ΓऔΓ͕૿͑Δ w 1SFTFOUFSʹدͤΔɺ૒ํ͔ΒΞΫηεͰ͖Δ4UBUFΫϥεΛ͓͍࣋ͬͯͨ΄͏͕ ྑ͍͔΋

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Souzoh confidential and proprietary LiveData 10

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Souzoh confidential and proprietary LiveData 11 w ϝϧΧϦɹΧ΢ϧͰ͸ΞϓϦશମʹσʔλΛ౉ͨ͢Ίʹ  1VCMJTI4VCKFDU#FIBWJPS4VCKFDUΛ࣮૷  1SFTFOUFSͰߪಡొ࿥Λ͍ͯ͠Δ ɾ֤੡඼ηϧʹ͍͍ͭͯΔ-JLF6O-JLFϘλϯ  ɾ੡඼ͷຊ୨΁ͷ௥Ճॲཧ  ɾӾཡཤྺͷߋ৽ॲཧ  ɾϐοΫΞοϓͷ௥Ճ → LiveDataʹஔ͖׵͑

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Souzoh confidential and proprietary LiveData 12 w 1VCMJTI4VCKFDU#FIBWJPS4VCKFDUʹมΘΔ.VUBCMF-JWF%BUBΛੜ੒ w 1SFTFOUFSʹߪಡॲཧΛ௥Ճ

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Souzoh confidential and proprietary LiveData 13 w ಋೖʹ͓͚ΔϝϦοτ w ֤ը໘Ͱશମ௨஌ܥͷ$PNQPTJUF%JTQPTBCMFEJTQPTF͕ෆཁʹ w ؾΛ͚͍ͭͨϙΠϯτ w 1SFTFOUFSͰར༻͢Δ৔߹͸-JGFDZDMF0XOFSΛ౉͓ͯ͘͠ඞཁ͕͋Δ w ༷ʑͳը໘Ͱ͞ΕΔ1VCMJTI4VCKFDU#FIBWJPS4VCKFDUΛஔ͖׵͑Δ ͷ͸ख͔ؒͳ͋ ແཧͯ͠ஔ͖׵͑ͳͯ͘ྑ͍͔΋஌Εͳ͍

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Souzoh confidential and proprietary ViewModel 14

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Souzoh confidential and proprietary ViewModel 15 w ϝϧΧϦΧ΢ϧ͸ॎը໘Λલఏʹ࣮૷͞Ε͍ͯΔ w ग़඼ը໘ͷύϥϝʔλೖྗɺ࿈ଓεΩϟϯը໘ͳͲͷը໘ભҠΛ લఏͱͨ͠ϨΠΞ΢τͷͨΊTBWFE*OTUBODF4UBUFΛར༻  w ແݶεΫϩʔϧͷ7JFX1BHFSΛ࣋ͭϥϯΩϯάը໘ͳͲͰ͸Ұ౓ දࣔͨ͠λϒ಺ͷ৘ใΛϝϞϦΩϟογϡ͍ͯ͠Δ  → ViewModelʹஔ͖׵͑ → ViewModelʹஔ͖׵͑Ͱ͖ͦ͏

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Souzoh confidential and proprietary ViewModel 16 w ಉҰͷ7JFX.PEFMͰ΋LFZͰෳ਺ੜ੒Մೳ  ਌ͷ'SBHNFOUʹඥ෇͚Δ͜ͱͰແݶ7JFX1BHFS ݫີʹ͸ผͷ 'SBHNFOU Ͱ΋Ҏલͷը໘ঢ়ଶΛҾ͖ग़ͤΔ

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Souzoh confidential and proprietary ViewModel 17 w ಋೖʹ͓͚ΔϝϦοτ w 7JFXͷॳظԽɺݺͼग़͠ॲཧΛ*OTUBODF4UBUFܥͷϝιουʹ෼ࢄͤ͞ Δඞཁ͕ͳ͘ͳΓίʔυ͕·ͱ·ͬͨ w ؾΛ͚͍ͭͨϙΠϯτ w 7JFX.PEFMͷதʹ͸৭ʑೖΕΔ͜ͱ͕Ͱ͖Δ͕ɺԿΛೖΕ͓ͯ͘ͷ͔ ໌֬ʹ͓ͯ͘͜͠ͱ͕େࣄ

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Souzoh confidential and proprietary ·ͱΊ 18 • ϝϧΧϦ Χ΢ϧͰҰ෦ػೳΛLifecycle,LiveData,ViewModelͰ࡞੒ • ΋ͱ΋ͱͷߏ଄͕Lifecycleʹ͍ͦͬͯͨ͜ͱ΋͋Γɺಋೖ͸؆୯ͩͬͨ • RxJava2Ͱ׬݁Ͱ͖͍ͯΔ෦෼Λࠩ͠ସ͑Δͷ͸͋·Γࢫຯ͕ͳ͍

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Souzoh confidential and proprietary ࠷ޙʹ 19 ※ٕज़ॻͳͷʹԆʑͱΞχϝιϯάʹ͍ͭͯ೤͘ޠ͍ͬͯΔͷ෇࿥ίʔφʔ͕͓͢͢ΊͰ͢ ϝϧΧϦ Χ΢ϧͰಉਓຊΛग़͠·ͨ͠

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Souzoh confidential and proprietary ͋Γ͕ͱ͏͍͟͝·ͨ͠ 20