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1年ぶりにやりなおすKotlinアプリ開発
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Kazuya Kitahara
July 12, 2017
Programming
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1.7k
1年ぶりにやりなおすKotlinアプリ開発
Kazuya Kitahara
July 12, 2017
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Transcript
1ͿΓʹΓͳ͓͢KotlinΞϓϦ։ൃ .HSBN*OD ݪ
ࣗݾհ w ݪ w גࣜձࣾNHSBNʢچגࣜձࣾ-JQʣΤϯδχΞ w ۀϝϯόʔͷ̍ਓͰ͢ɻ w લʹϛΫγΟ͔Βస৬͠·ͨ͠ɻ w
"OESPJEϝΠϯɻ8FCɾJ04ঢ়گʹԠͯ͡։ൃ w झຯөըɾອը
γϯɾΰδϥͷҠಈܦ࿏Λਤ্ͰΞχϝʔγϣϯ w U (&0(3"1)*$0'(0%;*--" IUUQHFPHPE[JMMBUL
ΤϜάϥϜੑ֨அ w ͷ࣭Ͱੑ֨Λਖ਼֬அ w ΩϟονʔͳΞτϓοτ w ແྉ w ϲ݄Ͱສਓͷํ͕அ
1ͿΓʹΓͳ͓͢KotlinΞϓϦ։ൃ
͢ࣄ w ͿΓʹ,PUMJOΛ৮ͬͯࢥͬͨࣄ w ,PUMJOͱҰॹʹར༻ՄೳͳϥΠϒϥϦ
ͿΓʹ,PUMJOΛ৮ͬͯࢥͬͨࣄ
͑ΔϥΠϒϥϦ͕૿͑ͯΔ w "OOPUBUJPOϓϩηοαʔΛར༻͍ͯ͠ΔϥΠϒϥϦ ͑ͨΓ͑ͳ͔ͬͨΓ͍ͯͨ͠ w %BHHFS%BUB#JOEJOH͏·͘ಈ͔ͳ͔ͬͨΑ͏ʹه Ա w ৭ΜͳϥΠϒϥϦ͕͑ΔΑ͏ʹͳͬͯΔʂ
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ͬͺΓ,PUMJO͍͍͢ w FOVN w ԆϓϩύςΟ w HFUUFSTFUUFS w ֦ுؔ ಛʹ͖͢ͳػೳ
FOVN (FOEFSLU FOVNDMBTT(FOEFS WBMKQ4USJOH \ NBMF உੑ GFNBMF ঁੑ
PUIFS ͦͷଞ ^ w ྻڍܕ w ,PUMJOͷFOVN؆୯ʹΛ࣋ͨͤΔࣄ͕Ͱ͖ͯศར w 'SBHNFOU1BHFS"EBQUFSͷදࣔॱΛFOVNͰཧͯ͠·͢
FOVN .BJO1BHFLU FOVNDMBTT.BJO1BHF\ 1"(&\ PWFSSJEFGVOGSBHNFOU 'SBHNFOU\ SFUVSO1"(&'SBHNFOUOFX*OTUBODF ^ ^
1"(&\ PWFSSJEFGVOGSBHNFOU 'SBHNFOU\ SFUVSO1"(&'SBHNFOUOFX*OTUBODF ^ ^ BCTUSBDUGVOGSBHNFOU 'SBHNFOU ^
FOVN .BJO1BHFS"EBQUFSLU DMBTT.BJO1BHFS"EBQUFS GN'SBHNFOU.BOBHFS 'SBHNFOU4UBUF1BHFS"EBQUFS GN \ PWFSSJEFGVOHFU*UFN QPTJUJPO*OU
'SBHNFOU \ SFUVSO.BJO1BHFWBMVFT <QPTJUJPO>GSBHNFOU ^ PWFSSJEFGVOHFU$PVOU *OU\ SFUVSO.BJO1BHFWBMVFT TJ[F ^ PWFSSJEFGVOHFU1BHF5JUMF QPTJUJPO*OU $IBS4FRVFODF\ SFUVSO.BJO1BHFWBMVFT <QPTJUJPO>TDSFFO/BNF ^ ^
ԆϓϩύςΟ WBMHSBNCZMB[Z\lNHSBNz^ w ͡ΊͯΞΫηε͞Εͨͱ͖ʹܭࢉ͞ΕΔϓϩύςΟ w ฐࣾͰɺ'SBHNFOUʹ͢ͱ͖ʹ1BSDFMBSͱ߹Θͤͯ ͬͯ·͢ɻ
ԆϓϩύςΟ 'SBHNFOUͰͷར༻ྫ DPNQBOJPOPCKFDU\ GVOOFX*OTUBODF VTFS6TFS 6TFS%JBMPH'SBHNFOU\ WBMBSHT#VOEMF BQQMZ\ QVU1BSDFMBCMF 4FSJBMJ[F,FZ64&3OBNF
1BSDFMTXSBQ VTFS ^ SFUVSO6TFS%JBMPH'SBHNFOU BQQMZ\ BSHVNFOUTBSHT ^ ^ ^
ԆϓϩύςΟ ԆϓϩύςΟͰWBMʹͰ͖Δ QSJWBUFWBMVTFS6TFSCZMB[Z\ 1BSDFMTVOXSBQ6TFS BSHVNFOUTHFU1BSDFMBCMF 4FSJBMJ[F,FZ64&3OBNF
^ ԆϓϩύςΟΛར༻͠ͳ͍߹ QSJWBUFMBUFJOJUWBSVTFS6TFS PWFSSJEFGVOPO$SFBUF TBWFE*OTUBODF4UBUF#VOEMF \ TVQFSPO$SFBUF TBWFE*OTUBODF4UBUF VTFS1BSDFMTVOXSBQ6TFS BSHVNFOUTHFU1BSDFMBCMF 4FSJBMJ[F,FZ64&3OBNF ^
HFUUFSTFUUFS w ,PUMJOͰHFUUFSTFUUFSͷఆָ͕ٛ͘͢͝Ͱ͢ɻ w ฐࣾͰɺ%BUBCJOEJOHʹ͢0CTFSWBCMFͳ.PEFM 7JFX.PEFMΛ࡞͢ΔࡍʹΑ͍ͬͯ͘·͢ɻ
HFUUFSTFUUFS 7JFX.PEFM DMBTT6TFS7JFX.PEFM #BTF0CTFSWBCMF \ !#JOEBCMF WBSNBJM4USJOH TFU NBJM \
pFMENBJM OPUJGZ1SPQFSUZ$IBOHFE #3NBJM OPUJGZ1SPQFSUZ$IBOHFE #3WBMJE ^ !HFU#JOEBCMF WBSWBMJE#PPMFBOGBMTF HFU \ JG UIJTNBJMJT/VMM0S&NQUZ SFUVSOGBMTF WBMNBUDIFS1BUUFSOT&."*-@"%%3&44NBUDIFS UIJTNBJM SFUVSONBUDIFSNBUDIFT ^ ^
֦ுؔ w طଘͷΫϥεʹରͯ͠ޙ͔ΒϝιουΛՃ͢Δࣄ͕Ͱ͖ Δػೳ w #JOEJOH"EBQUFSΛՃ͢Δͱ͖ʹΑͬͯ͘·͢ɻ
֦ுؔར༻͠ͳ͍߹ 1JDBTTPͷMPBE*NBHF PCKFDU*NBHF7JFX#JOEJOH"EBQUFS\ !#JOEJOH"EBQUFS CJOEJNBHF6SM !+WN4UBUJD GVOMPBE*NBHF WJFX*NBHF7JFX VSM4USJOH
\ 1JDBTTPXJUI WJFXDPOUFYU MPBE JNBHF6SM JOUP WJFX ^ ^
֦ுؔར༻ͨ͠߹ 1JDBTTPͷMPBE*NBHF !#JOEJOH"EBQUFS CJOEJNBHF6SM GVO*NBHF7JFXMPBE*NBHF JNBHF6SM4USJOH \ 1JDBTTPXJUI UIJTDPOUFYU
MPBE JNBHF6SM JOUP UIJT ^
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,PUMJOͱҰॹʹར༻ՄೳͳϥΠϒϥϦ
௨৴ɾඇಉظॲཧपΓ w 3FUSPpU w 0L)UUQ w 3Y+BWB
௨৴ɾඇಉظॲཧपΓ .BJO"DUJWJUZ7JFX.PEFMLU UIJTDMJFOUHFU"DDPVOU CJOE5P-JGFDZDMF BDUJWJUZ TVCTDSJCF0O 4DIFEVMFSTOFX5ISFBE
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1BSDFMFS 6TFS1SPpMFLU !1BSDFM EBUBDMBTT6TFS1SPpMF!1BSDFM$POTUSVDUPS DPOTUSVDUPS !1BSDFM1SPQFSUZ JDPO WBMJDPO4USJOH
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QVU1BSDFMBCMF 4FSJBMJ[F,FZ64&3@1SPpMFOBNF 1BSDFMTXSBQ VTFS1SPpMF ^
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WBMOBNF4USJOH \ ^ w KTPOͷύʔεΛࣗಈԽ͢ΔϥΠϒϥϦ w ฐࣾͰQSPHVBSEରԠʹΞϊςʔγϣϯΛར༻ͯ͠ର Ԡ͍ͯ͠·͢ɻ
%BSU w *OUFOUʹσʔλΛ͢ͷΛָʹ͢ΔϥΠϒϥϦ w ,&:ͷࢦఆ͕ෆཁʹͳΔ
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%BSUΛ'SBHNFOUͰར༻͢Δʁ 6TFS'SBHNFOULU HFU*OUFOU QVU&YUSBT )FOTPOXJUI UIJT HPUP.Z'SBHNFOU BSH
BSH CVJME HFU4VQQPSU'SBHNFOU.BOBHFS CFHJO5SBOTBDUJPO SFQMBDF 3JEDPOUBJOFS OFX.Z'SBHNFOU DPNNJU w IUUQTHJUIVCDPNGQSBUFFLEBSUJTTVFTʮ୭͔པΉʯ w ࡌ͍ͬͯΔํ๏ඍົͳͷͰɺ'SBHNFOUͰར༻͍ͯ͠·ͤΜɻ
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BOESPJETUBUF .BJO"DUJWJUZLU PWFSSJEFGVOPO$SFBUF TBWFE*OTUBODF4UBUF#VOEMF \ TVQFSPO$SFBUF TBWFE*OTUBODF4UBUF 4UBUF4BWFSSFTUPSF*OTUBODF4UBUF UIJT
TBWFE*OTUBODF4UBUF ^ .BJO"DUJWJUZLU !4UBUF WBSOBNF4USJOH OVMM
·ͱΊ w ͿΓʹ,PUMJOΛͬͯΈͨΒ͑ΔϥΠϒϥϦ͕͢͝ ͘૿͑ͯͯศརͩͬͨ w ,PUMJOͷجຊػೳ૬มΘΒͣૉఢ w ͜Ε͔Βͷ։ൃ,PUMJOͰ࢝ΊΔͷ͕ྑͦ͞͏ ͿΓʹͬͨΒͬͺΓ,PUMJOྑ͔ͬͨ
גࣜձࣾNHSBNΤϯδχΞੵۃ࠾༻தͰ͢ɻ ਓͷΤϯδχΞΛ୳͍ͯ͠·͢ʂ ΤϯδχΞਓͰ͕Μ͍ͬͯ·͢ɻ ৽͍͠ͷେ͖ ࠊ͕ॏ͍