Kotlin Fest 2018 わいわい報告会 / mochicoroutines

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,PUMJO'FTU׻ְ׻ְ㜠デ⠓ !NPDIJDP ,PUMJO'FTU׻ְ׻ְ㜠デ⠓

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"CPVUNF NPDIJDP!@NPDIJDPO@ "OESPJE+BWB,PUMJO 5FDICPPTUFS䪮遭剅Ⱙ

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,PUMJO'FTUֶ气׸圫ד׃׋

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,PUMJO'FTU ˖ ㅷ䊛דꟚ⪵ ˖ 傈劤ⴱך,PUMJOؕٝؿ؋ٖٝأ ˖ ♧菙⿫⸇罏せ 1FBUJY״׶ ˖ إحءّٝ-5

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TUBSUGSPN$POWFSUUP,PUMJO

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$POWFSU+BWB'JMFUP,PUMJO'JMF

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㹋ꥷחכו׿ז؝٦سחז׏גְ׷ךַ

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%FDPNQJMF

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,PUMJO'FTU ֶׅׅ׭إحءّٝ

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չ,PUMJOד何㊣ׅ׷"OESPJE،فٔךㅷ颵պ ֮׿ְׂײֹׁ׿ IUUQTTQFBLFSEFDLDPNZBO[NLPUMJOGFTU ؔـآؙؑز䭷ぢⰅꟌ٥&FDUJWF+BWBזוד䱿׭׵ ׸גְ׷㛙暕ד〳铣䚍ծⱄⵃ欽䚍ך넝ְ؝٦سָ ,PUMJOדוך״ֲח鎉铂➬圫ח《׶Ⰵ׸׵׸ծ ,PUMJOד剅ֻֿהד䖞ֲֿהָדֹ׷ַהְֲֶ鑧

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չ,PUMJO׮ֲ♧娄պ 啾峔⛒ׁ׿ IUUQTTQFBLFSEFDLDPNLPCJUPLBCBLPUMJONPV CV ,PUMJOך㘗ח׮ֲ♧娄驎׫鴥׿׌ֶ鑧կ ؙٓأה㘗ך麩ְծ؟ـة؎فהכծ/VMM鏩㺁䚍ծ ♶㢌٥Ⱏ㢌٥⿾㢌

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չ,PUMJO،فٔךٔؿ؋ؙةؚٔٝه؎ٝزպ ⚥ꅽ湫➂ׁ׿ IUUQTXXXTMJEFTIBSFOFU3FDSVJU-JGFTUZMF SFGBDUPSJOHQPJOUPGLPUMJOBQQMJDBUJPO ,PUMJO׾⢪׏גٔؿ؋ؙةؚׅٔٝ׷կ

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չ)PXUP5FTU4FSWFSTJEF,PUMJOպ ꈿ加⨳㣕ׁ׿٥⵸⾱猕䗗ׁ׿ IUUQTTQFBLFSEFDLDPNNBFIBSJOIPXUPUFTU TFSWFSTJEFLPUMJOOVNCFSLPUMJOGFTU 4FSWFS4JEFד6OJUذأزךٓ؎ـٓٔכׄ׭TQSJOHؿ ٖ٦يٙ٦ؙח屟׏׋剅ֹ倯ծ%#ذأزך⸬桦⻉ז וկ ⵸⼱ךٓ؎ـٓٔ稱➜כ"OESPJEד׮剣欽կ

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չ,PUMJO؝ٕ٦ثٝ׾椚鍑׃״ֲպ Ⱂ加⤥䎢ׁ׿ IUUQTTQFBLFSEFDLDPNTZTZBHJLPUMJO LPSVUJOXPMJKJFTJZPV +BWBדכأذ٦زوءٝה׃ג㹋遤ׁ׸׷ֿהתד 鍑铡׃׋,PUMJO؝ٕ٦ثٝך寸㹀晛

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չ,PUMJOMJOUFSպ ꆏ㹧䡞⛒➜ׁ׿ IUUQTTQFBLFSEFDLDPNLHNZTIJOLPUMJOMJOUFS LUMJOU EFUFLU BOESPJEMJOUך暴䗙ծ鏣㹀ծؕأةي ٕ٦ٕך㼪Ⰵחאְג鍑铡

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չ)PXUP,POUSJCVUF W+1 պ 熖頺⢕Ⱙׁ׿ IUUQTQIPUPTHPPHMFDPNTIBSF "'2JQ/B:@+-(28#'HT.MG(G N26U[R'4MNI%GE'8(NTB$4F)P*PDOH LFZC63%E9#:56E%EM7%/8:U5%I#3['KCO2-7M;3KM3 ,PUMJO׉ך׮ךחفؙٕٔ׾鷏׷$POUSJCVUFׅ׷,POUSJCVUF ך➬倯׾鑫׃ֻ铡僇կ ֿך酅ך-5㣐⠓דז׿ה➂׮ך涫㠡罏ָTIJSBKJׁ׿ח侄׻׏׋ז ו鎉⿹׃גְ׋կ

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չ,PUMJOד䠥ד׷.JDSPTFSWJDFTպ TUPSNDBUׁ׿ IUUQTTQFBLFSEFDLDPNTUPSNDBULPUMJOGFTU 㹋騧涸זغحؙؒٝس,PUMJO鍑铡

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וךإحءّٝ׮ֶ׮׃׹ְךד׫ג׫גֻ׌ְׁ

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$PSPVUJOFהכ ˖ Ⳣ椚ך鷿⚥ד♧儗⨡姺ָ〳腉 ˖ ⴽךأٖحسדⱄꟚָ〳腉 ˖ ⚥倖٥ⱄꟚך֮׷؝٦سꬊず劍Ⳣ椚זו׾ءٝ فٕח剅ֽ׷ ˖ 3Y+BWBהכ㹋植׃׋ְֿהָ殯ז׷

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IUUQTTQFBLFSEFDLDPNTZTZBHJLPUMJOLPSVUJOXPMJKJFTJZPV ©2018 Lang-8 Inc. ALL Rights Reserved. ܧଓঢ়گΛ༰қʹॻ͘ ίϧʔνϯ BTZODBXBJU fun loadProfile(id: Int) { getProfile(token) { profile -> showProgile(profile) } } ίʔϧόοΫελΠϧ fun loadProfile(id: Int) { val profile = getProfile(id).await() showProfile(profile) } ˞ٖࣅίʔυͰ͢

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$PSPVUJOFדֹ׉ֲז孡ָ׃גֹ׋

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וַֿ׵㨣׭׸לְְ׿׌׹ֲ

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IUUQTTQFBLFSEFDLDPNTZTZBHJLPUMJOLPSVUJOXPMJKJFTJZPV ©2018 Lang-8 Inc. ALL Rights Reserved. PO"DUJWJUZ3FTVMUΛTVTQFOE launch(UI) { val result = activityResult(intent) if (result.isOk) { // ok val data: Intent? = result.flatMap() } else { // ng } } IUUQTHJUIVCDPNQEWSJF[FBOESPJEDPSPVUJOFT BOESPJEDPSPVUJOFTͱ͍͏αʔυύʔςΟϥΠϒϥϦ͕ ఏڙɻSFRVFTU1FSNJTTJPO΋͋ΔΑ

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USZ BOESPJEDPSPVUJOFT

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橆㞮圓眠 kotlin_version = ‘1.2.61’ kotlin { experimental { coroutines 'enable' } } implementation 'org.jetbrains.kotlinx:kotlinx-coroutines-core: 0.25.3'

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橆㞮圓眠 kotlin_version = ‘1.2.61’ kotlin { experimental { coroutines 'enable' } } implementation ‘org.jetbrains.kotlinx:kotlinx-coroutines-core:0.25.3' implementation 'net.devrieze:android-coroutines:0.7.0'

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BOESPJEDPSPVUJOFT IUUQTHJUIVCDPNQEWSJF[FBOESPJEDPSPVUJOFT

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PO"DUJWJUZ3FTVMU startActivityForResult( requestIntent, REQUEST_CODE) override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) { super.onActivityResult(requestCode, resultCode, data) when (requestCode) { REQUEST_CODE -> { if (resultCode == Activity.RESULT_OK) { data ?: return setResult(RESULT_OK, data) finish() } } } }

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PO"DUJWJUZ3FTVMU launch(UI) { val result = activityResult(requestIntent) if (result.isOk) { // ok val data: Intent? = result.flatMap() setResult(RESULT_OK, data) finish() } else { // ng } }

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USZBOESPJEDPSPVUJOFT׃ג׫׋䠬䟝 ˖ ׅ׀ֻءٝفٕ ˖ ؙٔؒأزהٖأهٝأָずׄ㜥䨽חתהת׷ךד 铣׫װְׅ ˖ 3Y+BWBך縧ֹ䳔ִ״׶䕦갟眔㔲ָ㼰זְ ˖ 㸣Ⰻח傊䒭ה⢘欽〳腉

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3Y+BWB׾⢪׏גְ׷傀㶷،فٔח ,PUMJO$PSPVUJOFT׾㼪Ⰵ׃״ֲ IUUQTRJJUBDPNUBLBIJSPNJUFNTBDBCDEEF

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USZBOESPJEDPSPVUJOFT׃ג׫׋䠬䟝 ˖ DPSPVUJOF荈⡤ָת׌♧䘔FYQFSJNFOUBM ˖ BOESPJEDPSPVUJOF׮FYQFSJNFOUBM ˖ فٗتؙزפך㼪Ⰵכ荈䊹顑⟣ד

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&OKPZ,PUMJO

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SFG ˖ (FUUJOHTUBSUFEXJUI"OESPJEBOE,PUMJO,PUMJO 1SPHSBNNJOH-BOHVBHFIUUQTLPUMJOMBOHPSH EPDTUVUPSJBMTLPUMJOBOESPJEIUNM ˖ (FU4UBSUFEXJUI,PUMJOPO"OESPJE]"OESPJE %FWFMPQFSTIUUQTEFWFMPQFSBOESPJEDPNLPUMJO HFUTUBSUFE ˖ <,PUMJO؎ٝ٥،ؙءّٝ]و؎شؽـحؙأ> IUUQT CPPLNZOBWJKQFDQSPEVDUTEFUBJMJE