Modern REST Communicate for Android

by kobayashi_kento

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Modern REST Communicate for Android 2016.5.20 @kobaken42

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Agenda • Keyword • ΍Βͳ͍͜ͱ • RESTʹ͍ͭͯ • ࢖༻ϥΠϒϥϦ঺հ • αϯϓϧΞϓϦͷ࣮૷(ϨϏϡϫʔ͋Γ) • Keyword(͓͞Β͍)

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Keyword • REST(RESTful) • (ؔ਺ܕ)ϦΞΫςΟϒϓϩάϥϛϯά(FRP) • ReactiveX(ϦΞΫςΟϒΤΫεςϯγϣϯ) • Parse(ύʔε)

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΍Βͳ͍͜ͱ • Androidʹؔ͢Δઆ໌(Activity, Fragment, Lifecycle etc…) • RESTɺFRPʹؔ͢Δৄࡉͳઆ໌ • ϨΨγʔͳ࣮૷ͱͷൺֱ

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ʊਓਓਓਓʊ ʼ REST ʻ ʉY^Y^Y^Yʉ

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Webͷ ΞʔΩςΫνϟελΠϧͷҰͭ

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ύϥϝʔλΛࢦఆͯ͠ ಛఆURLʹHTTP(s)ͰΞΫηε XML or jsonͰ݁Ռ͕ฦ٫͞ΕΔ

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ύϥϝʔλ(Input)͕ಉҰͳΒ ৗʹಉ݁͡Ռ(Output)͕ظ଴Ͱ͖Δ (γεςϜͷঢ়ଶ΍ηογϣϯʹґଘ͠ͳ͍)

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(ͪΐͬͱཚ๫͚ͩͲ) ҰߦͰݴ͏ͱ

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Ϧιʔεॏࢹઃܭ

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RESTful item_url -> items/:id new_item_url -> items/new edit_item_url -> items/:id/edit items_url -> items

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Not RESTful

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ίϨͰΘ͔Βͳ͍ਓ͸ ϫγϫγMAX΍Ͱʙʂʂ ͦΜͳͷ͋Μ·Γʹ͜ʙʂʂ

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ຊ୊΁

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ϦΞΫςΟϒͳ REST௨৴Λ࣮ݱͨ͠ αϯϓϧΞϓϦΛ࡞੒͍͖ͯ͠·͢

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༏लͳϨϏϡϫʔͷྗΛ आΓͳ͕Β࣮૷͍͖ͯ͠·͢Αʂ

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࢖༻ϥΠϒϥϦͷ঺հ

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࢖༻ϥΠϒϥϦ(Plugin) • Retroﬁt • RxAndroid • Retrolambda • Lombok • butterknife(DataBindingʹஔ͖׵͑·ͨ͠)

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Retroﬁt v2.0.2 • AndroidͱJavaͷͨΊͷܕ҆શͳ HTTPΫϥΠΞϯτ • ಺෦ͰOkhttpΛ࢖༻ • AsyncLoaderͱ͸΋͏͓͞Β͹ • jsonύʔεͱ͔ॾʑ΍ͬͯ͘ΕΔ • Apache HTTP ClientʁūŬťƀŘŶƂŜƃūŘ!!

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RxAndroid v1.2.0 • RxJavaΛ಺แ͍ͯ͠ΔAndroid޲͚ ReactiveX • ϦΞΫςΟϒϓϩάϥϛϯάग़དྷΔ • ඇಉظॲཧ͕؆୯ʹॻ͚Δ (AsyncTaskͳΜͯͳ͔ͬͨ) • ڞ௨ͷΠϯλʔϑΣʔεͱͯ͠׆༻ • View͔ΒͷΠϕϯτΛड͚औΔ • ίʔϧόοΫͷҰݩ؅ཧ etc…

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Retrolambda • AndroidͰϥϜμ͕ࣜॻ͚ΔΑ͏ʹ ͳΔPlugin • Method Referenceʹ΋ରԠ • RxAndroid, Stream APIͱͷซ༻ར ༻Ͱ΄΅Java8؀ڥʹʂ

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Lombok v1.16.8 • JavaͰΑ͋͘ΔϘΠϥʔϓϨʔτ ίʔυΛγϯϓϧʹͯ͘͠ΕΔ • getter, setterͷهड़ෆཁʹ • nullνΣοΫΛࣗಈͰ΍ͬͯ͘ΕΔ • MITϥΠηϯε

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ϥΠϒϥϦ঺հ͸͜͜·Ͱ

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΍Δ͜ͱ

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΍Δ͜ͱ • ࢖༻ϥΠϒϥϦΛGradleͰએݴ • REST௨৴ͷͨΊͷAPIΠϯλʔϑΣʔε࡞੒ • Ϩεϙϯε༻ͷΦϒδΣΫτΛ࡞੒ • ϦΞΫςΟϒϓϩάϥϛϯάͰREST௨৴ʂ

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Ͱ͸ૣ଎

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gradleʹهड़ͯ͘͠Ͱ

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build.gradle(app௚Լ)

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࣍

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WebAPIͷInterface ࡞ΔͰ

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ࠓճ͸ొ࿥ෆཁͳ͓खܰAPIΛ ར༻͍ͨ͠Μ΍ʂ

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࢖༻API • WeatherHacks

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WeatherHacksApi.java

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ResponseObject(Entity) ࡞ΔͰ

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ResponseObject.java

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Լ४උऴΘΓ

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ͦΕ͡Όɺຊ൪ߦ͘΍Ͱ

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͜Ε͔Β΍Δ͜ͱ

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ࡾߦͰ

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Activity(Fragment)ʹ RetroﬁtΦϒδΣΫτΛੜ੒ͯ͠ subscribeʂ

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MainActivity.java

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MainActivity.java

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MainActivity.java

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͜Ε͚ͩʂ

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ࢥΘͤͯ

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AndroidManifest.xmlʹ Internet௨৴ͷͨΊͷ Permissionهड़͕ඞཁͦ͏ɾɾɾ

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AndroidManifest.xml

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AndroidManifest.xml

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Keyword(͓͞Β͍) • REST(RESTful) • (ؔ਺ܕ)ϦΞΫςΟϒϓϩάϥϛϯά(FRP) • ReactiveX(ϦΞΫςΟϒΤΫεςϯγϣϯ) • Parse(ύʔε) • ঁਆͷΜͨΜ