Android Architecture Componentsを使って、改善・効率化するAndroidアプリ開発

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©2019 Wantedly, Inc. Android architecture components   are a collection of libraries that help you design robust, testable, and maintainable apps. Page Title Page Subtitle https://developer.android.com/topic/libraries/architecture

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©2019 Wantedly, Inc. !0O-JGFDZDMF&WFOU ʜ -JGFDZDMF"XBSF$PNQPOFOUT @OnLifecycleEvent(Lifecycle.Event.ON_START) fun start() { // startObserveSomething { result -> // callback(result) // } } @OnLifecycleEvent(Lifecycle.Event.ON_STOP) fun stop() { // ઀ଓΛղআ͢Δ }

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©2019 Wantedly, Inc. -JGFDZDMF&WFOU0/@45"35 -JGFDZDMF"XBSF$PNQPOFOUT @OnLifecycleEvent(Lifecycle.Event.ON_START) fun start() { // startObserveSomething { result -> // callback(result) // } } @OnLifecycleEvent(Lifecycle.Event.ON_STOP) fun stop() { // ઀ଓΛղআ͢Δ } w 3FBDU w DPNQPOFOU%JE.PVOU w J04 w WJFX%JE"QQFBS ଞͷϑϨʔϜϫʔΫʹ౰ͯ͸ΊΔͱ͜Μͳײ͡

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©2019 Wantedly, Inc. -JGFDZDMF&WFOU0/@4501 -JGFDZDMF"XBSF$PNQPOFOUT @OnLifecycleEvent(Lifecycle.Event.ON_START) fun start() { // startObserveSomething { result -> // callback(result) // } } @OnLifecycleEvent(Lifecycle.Event.ON_STOP) fun stop() { // ઀ଓΛղআ͢Δ } ଞͷϑϨʔϜϫʔΫʹ౰ͯ͸ΊΔͱ͜Μͳײ͡ w 3FBDU w DPNQPOFOU8JMM6ONPVOU w J04 w WJFX8JMM%JTBQQFBS

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©2019 Wantedly, Inc. -JGFDZDMFΛߟྀͯ͘͠ΕΔɺ0CTFSWBCMF ϑϨʔϜϫʔΫͷ-JGFDZDMFʹ͏·͘৐͔ͬͬͯ͘ΕΔ w -JGFDZDMFతʹɺը໘ͷߋ৽Λͯ͠΋ྑ͍ঢ়ଶͷ ࣌ʹ͸஋͕ྲྀΕͯ͘Δɻͦ͏͡Όͳ͍ͱ͖͸ྲྀΕ ͯ͜ͳ͍ ‎ ը໘͕ࢮΜͩޙʹ7JFXΛߋ৽͠Α͏ͱͯ͠ࢮͳ ͳ͍ ‎ ։ൃऀ͸-JGFDZDMF΁ͷҙࣝΛ͜Ε·ͰΑΓ΋ɺ ͠ͳ͘ͱ΋7JFXͷߋ৽ॲཧ͕Ͱ͖ΔΑ͏ʹͳͬ ͯɺޮ཰తͰɺੜ࢈ੑ͕ߴ͍ ͦ΋ͦ΋ͲΜͳ΋ͷʁ -JWF%BUB

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©2019 Wantedly, Inc. -JGFDZDMF0XOFS -JGFDZDMFͷঢ়ଶΛ஌͍ͬͯΔଘࡏ public interface LifecycleOwner { /** * Returns the Lifecycle of the provider. * * @return The lifecycle of the provider. */ @NonNull Lifecycle getLifecycle(); }

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©2019 Wantedly, Inc. ը໘ճసΛ৐Γ੾Δ͜ͱ͕Ͱ͖Δ ը໘͕ճసͨ࣌͠ɺը໘͸࠶ੜ੒͞ΕΔ͕ɺ7JFX.PEFM͸มΘΒͳ͍ w ͭ·Γɺ7JFX.PEFM͸ը໘Λੜ੒ͨ࣌͠ʹ࡞Β ΕΔͦͷΠϯελϯεͱมΘΒͳ͍ͷͰɺը໘Λ ࠶ੜ੒ͨ࣌͠ʹ΋ɺಉ͡΋ͷΛ࢖͏͜ͱ͕Ͱ͖ Δɻ ‎ Αͬͯɺը໘Λճసͨ࣌͠ͷॲཧͳͲΛؾΛͭ ͚ͯॻ͔ͳͯ͘΋Α͘ͳͬͨ 7JFX.PEFMͷ͍͢͝ͱ͜Ζ 7JFX.PEFM

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©2019 Wantedly, Inc. $POTUSBJOUT#VJMEFS 8PSL.BOBHFSͷδϣϒͷىಈʹඞཁͳ੍໿Λઃ͚Δ w TFU3FRVJSFE/FUXPSL5ZQF w TFU3FRVJSFT#BUUFSZ/PU-PX w TFU3FRVJSFT$IBSHJOH w TFU3FRVJSFT%FWJDF*EMF w TFU3FRVJSFT4UPSBHF/PU-PX σόΠεͷঢ়ଶͰ࣮ߦ͢Δ͔Ͳ͏͔ΛܾΊΔ 8PSL.BOBHFS

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©2019 Wantedly, Inc. 1BHFE-JTU ϖʔδωʔγϣϯʹඞཁͳ1BHFͷσʔλΛ࣋ͭ w ͜ͷ1BHFE-JTUΛ-JWF%BUBͰฦ͢Α͏ͳ࣮૷Λࣗ෼Ͱ͔͘ w ࠓ·ͰɺಠࣗʹΞΠςϜΧ΢ϯτΛͯ͠Լ·ͰߦͬͨΒʜͱ ߦͬͨ෩ʹॻ͍͍࣮ͯͨ૷Λڞ௨Խ͢Δ͜ͱ͕Ͱ͖Δ w ݱࡏ͸ओʹ3PPNͷσʔλ͔ΒͷಡΈࠐΈ͕ϝΠϯ w ωοτϫʔΫ͔ΒͷಡΈࠐΈΛαϙʔτ͸͍ͯ͠Δ͕ɺࠓޙ͞ Βʹ࢖͍΍͘͢ͳΓͦ͏ͳػೳ͕ఏڙ͞ΕΔݟࠐΈ͕͋Δ 1BHJOHͷओ໾ 1BHJOH

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©2019 Wantedly, Inc. ౰ॳͷઃܭ ਆ"DUJWJUZਆ'SBHNFOU͕͍ͯɺڊେͳ.BOBHFSΫϥε͕͍ΔΈ͍ͨͳઃܭ w ͜Εࣗ਎͸ѱ͘ͳ͍ͱࢥ͍ͬͯΔ w ݶΒΕͨϦιʔεͷதͰϢʔβʹՁ஋Λಧ͚Δඞཁ͕͋ͬͨ w ݩʑͷ։ൃऀ͕ҰਓͰશͯ࡞Γ੾ͬͨͷͰɺҰਓ͕։ൃΛ͢Δ ʹ͋ͨͬͯ࠷଎ͷઃܭʹͳ͍ͬͯͨ w ڊେͳΫϥεͰ͸͋Δ͕ɺΠϯλʔϑΣΠεઃܭ͕͖ͪΜͱ͠ ͍ͯͨͨΊɺΫϥε੹຿͕ͬͪ͝Όʹͳ͍ͬͯΔՕॴ͸গͳ ͔ͬͨ 8BOUFEMZ1FPQMF طଘϓϩμΫτ΁ͷಋೖͱͦͷมԽ

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©2019 Wantedly, Inc. .71ͷಋೖ .77.Ͱ7JFX.PEFMͷಋೖͷલʹ.71Ͱ·ͣ͸ബ͘࡞Δͱ͜Ζ͔Β w ੾Γग़ͨ͠ɺϩδοΫΛ1SFTFOUFSͰ࢖༻Ͱ͖Δ w ςετ͕͠΍͍͢ w ςετ͕ॻ͖΍͍͢ w ίʔυΛॻ͘ྔ͕ѹ౗తʹ૿͑Δ w ඇੜ࢈త w .77.Ͱ-JWF%BUBΛ࢖ͬͯYNMʹ௚઀όΠϯυͨ͠ํ͕ྑ͍ͷ Ͱ͸ʁͱ͍͏൑அʹͳΔ 8BOUFEMZ1FPQMF 6*૚ͷվળ

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©2019 Wantedly, Inc. "OESPJE%FWFMPQFST$PEFMBCT ·ͣ͸ެ͔ࣜΒ w IUUQTEFWFMPQFSBOESPJEDPNUPQJDMJCSBSJFTBSDIJUFDUVSF w ެࣜͷυΩϡϝϯτ͕ྑ͍ w ڵຯͷ༙͍ͨίϯϙʔωϯτ͕͋Ε͹$PEFMBCTΛ࢖ͬͯɺ  Ұ௨Γͷجຊతͳ࢖͍ํ͸ֶͿ͜ͱ͕Ͱ͖Δ w IUUQTEFWFMPQFSBOESPJEDPNUPQJDMJCSBSJFTBSDIJUFDUVSFBEEJUJPOBMSFTPVSDFTIUNM w 4BNQMFɺ$PEFMBCT΍#MPH΁ͷϦϯΫू w ͜͜ʹॻ͍ͯ͋Δ͜ͱΛಡΉͱ΋ͬͱ৭ʑͳ5JQTΛݟΔ͜ͱ͕Ͱ͖Δ ৘ใͷΩϟονΞοϓ Ͳ͕͍͍͜ʁ

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©2019 Wantedly, Inc. ࠷ۙͷ"OESPJE։ൃ͸͍ͩͿΜਐԽͨ͠ ""$͸طଘΞϓϦͷઃܭମݧΛஈ֊తʹվળͰ͖Δ w গͣͭ͠ಋೖͰ͖Δ w ಋೖεςοϓͷΦεεϝ͸ɺΞϓϦ಺ͷ௿͍ϨΠϠʔ͔Β͕Φεεϝ w 6*૚पΓ͸ࠓޙ΋มΘ͍ͬͯ͘ͱࢥ͍ͬͯΔ w J04ͳΒ4XJGU6* "OESPJEͳΒ+FUQBDL$PNQPTF w ΞϓϦ಺ͷσʔλपΓΛ͖ͪΜͱݻΊ͓ͯ͘ͷ͕େࣄ w ͦͷ఺ɺ3PPN͸ςελϏϦςΟ΋ߴ͘ɺ࠷ॳͷಋೖʹ͸Φεεϝ w ͨͩɺͦͷલʹݱࡏͷઃܭͱͷ݉Ͷ߹͍΋͋Δ͔Βͦ͜͸͏·͘΍ͬͯཉ͍͠ ·ͱΊ

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