Guide to app architectureを踏まえた既存アプリの設計改良 / DroidKaigi 2019

by nakamuuu

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Re:valua t ion https://fril.jp/ L ead & Delight User F irst Ownership Fail Smart (VJEFUPBQQBSDIJUFDUVSFΛ౿·͑ͨ طଘΞϓϦͷઃܭվྑ

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3BLVNB4FSWJDF%FWFMPQNFOU(SPVQ 3BLVUFO JOD ࣗݾ঺հ தଜܙଠ !DIJDLNVVV !OBLBNVVV

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(VJEFUPBQQBSDIJUFDUVSFΛ౿·͑ͨ طଘΞϓϦͷઃܭվྑ

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ࠓ೔͓࿩͢͠Δ͜ͱ w ࣗ෼ࣗ਎ɺΞϓϦέʔγϣϯͷઃܭʹରͯ͠՝୊Λɹ ײͭͭ͡΋औͬ෇͖ʹ͘͞Λ͍֮͑ͯͨɻ w ઃܭ࿦͸طଘίʔυͷҠߦͷ؍఺ͰޠΒΕʹ͍͘ʁ ʰ"OESPJEͷॳֶऀʱ ʰطʹϨΨγʔͳίʔυΛ๊͑Δ։ൃऀʱ λʔήοτ

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ࠓ೔͓࿩͢͠Δ͜ͱ ᶃ طଘΞϓϦͷઃܭվྑʹࢸΔόοΫάϥ΢ϯυ ᶄ (VJEFUPBQQBSDIJUFDUVSFͷུ֓ͱଊ͑ํ ᶅ طଘΞϓϦͷઃܭվྑͷ࣮ྫ ๻ΒͷϓϩμΫτͰͷઃܭվྑͷ࣮ྫΛ௨͠ɺɹɹɹɹ ઃܭʹ՝୊Λײ͍ͯ͡ΔਓʹԿ͔ώϯτΛ༩͑ΒΕΕ͹

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طଘΞϓϦͷઃܭվྑʹࢸΔ όοΫάϥ΢ϯυ

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ϓϩμΫτͷόοΫάϥ΢ϯυ ೥ "OESPJE൛ϩʔϯν ೥೥ σβΠϯϦχϡʔΞϧ ೥݄ ৽ʮϥΫϚʯ஀ੜ

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ϓϩμΫτͷόοΫάϥ΢ϯυ w "OESPJEΞϓϦͷઃܭʹର͢Δٞ࿦͸ࠓ΄Ͳਂ͘ͳ͍ w σϑΝΫτͱͳΔٕज़΍πʔϧ΋ఆ·ͬͯͳ͘ɺɹɹ օ͕ख୳ΓͰΞϓϦΛ࡞͍ͬͯΔݹ͖ྑ͖࣌୅ʜʁ ϓϩμΫτͷ஀ੜ͸ʮεϚϗΞϓϦᴈ໌ظʯ ʢ˞౰࣌͸·ͩΤϯδχΞͰͳ͔ͬͨͷͰͨͩͷ఻ฉʣ

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ʁʁʁ "OESPJEΤϯδχΞͷܦݧ஋ ʰࠓ·ͰݟͨதͰҰ൪௕͍"DUJWJUZͷߦ਺ʱ

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ઃܭ໘Ͱͷ՝୊ w ੍໿ͷബ͍ϓϨʔϯͳ.7$ w ࣮૷͕๲Εͨ"DUJWJUZ'SBHNFOU΋ͪΒ΄Βʜ w ੹຿Λڧ͘ҙࣝͰ͖ΔਓͰͳ͚Ε͹ɺ͍͘ΒͰ΋ɹɹ "DUJWJUZ'SBHNFOUʹϏδωεϩδοΫΛॻ͚Δ ͜Ε·ͰͷϥΫϚͷઃܭ

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ઃܭ໘Ͱͷ՝୊ ՝୊ᶃ๲ΒΜͩ7JFXͷ࣮૷΁ͷมߋ΍֦ுͷίετ w ෳࡶʹབྷΈ߹͏੍ޚϑϩʔͷதͰ ΤϯόάΛ๷͙ͷ͸೉͍͠ w ྫ͑͹࿈བྷઌɾॅॴͷઃఆը໘͸ "DUJWJUZ͚ͩͰߦ

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ઃܭ໘Ͱͷ՝୊ ՝୊ᶄ7JFX͕࣋ͭϩδοΫͷςετ͕ଘࡏ͠ͳ͍ w Ұ෦ͷϩδοΫΛ੾Γग़ͯ͠ແཧ΍Γݕূ͢Δ͜ͱ͸ Ͱ͖͕ͨɺઃܭϨϕϧͰڧ੍͞ΕΔ͜ͱ͸ͳ͔ͬͨɻ w ςετʹΑΓ୲อͰ͖ͨͰ͋Ζ͏ෆ۩߹΋গͳ͔Βͣ ଘࡏͨ͠ʢྫ͑͹Τϥʔදࣔ౳ͷҟৗܥʜʣ w ద੾ʹϏδωεϩδοΫ͕෼཭͍ͯ͠Ε͹๷͛ͨʁ

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ઃܭ໘Ͱͷ՝୊ ՝୊ᶅը໘ճస࣌ͳͲͷ"DUJWJUZ࠶ੜ੒΁ͷऑ͞ w "DUJWJUZͷߏ੒ͷมߋ࠶ੜ੒ʹ ର͢ΔέΞΛޮ཰తʹߦ͑ͳ͍ w ΦϨΦϨͳΞϓϩʔν͕ԣߦ

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ઃܭ໘Ͱͷ՝୊ ՝୊ᶅը໘ճస࣌ͳͲͷ"DUJWJUZ࠶ੜ੒΁ͷऑ͞ ˞ৄࡉ͸ڈ೥ͷ%SPJE,BJHJͷࢿྉࢀর IUUQTTQFBLFSEFDLDPNOBLBNVVVESPJELBJHJ

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ઃܭ໘Ͱͷ՝୊ ҰํͰʜ w ৔౰ͨΓతͳٕज़ͷಋೖ͸ϙϦγʔͱͯ͠ආ͚͖ͯͨ w ϨΨγʔͳϥΠϒϥϦͷґଘ͸গͳ͍ํʁ w ը໘͝ͱʹΑͬͯઃܭ͕ҧ͏ʜͱ͍͏͜ͱ΋ͳ͍ w 7JFX͔Β෼཭Ͱ͖͍ͯΔϏδωεϩδοΫʹؔͯ͠͸ ςετ΋ॻ͔Ε͍ͯΔ͠ɺઃܭ΋ഁ୼͍ͯ͠ͳ͍

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ઃܭ໘Ͱͷ՝୊ ՝୊ᶃ๲ΒΜͩ7JFXͷ࣮૷΁ͷมߋ΍֦ுͷίετ ՝୊ᶄ7JFX͕࣋ͭϩδοΫͷςετ͕ଘࡏ͠ͳ͍ ՝୊ᶅը໘ճస࣌ͳͲͷ"DUJWJUZ࠶ੜ੒΁ͷऑ͞ ઃܭͷ՝୊͸ݟ͕͑ͨͲ͔͜ΒखΛ͚ͭΕ͹ʜ

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ઃܭ໘Ͱͷ՝୊ (VJEFUPBQQBSDIJUFDUVSFc"OESPJE%FWFMPQFST IUUQTEFWFMPQFSBOESPJEDPNKFUQBDLEPDTHVJEF

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(VJEFUPBQQBSDIJUFDUVSFͷུ֓ͱଊ͑ํ

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(VJEFUPBQQBSDIJUFDUVSFͷུ֓ͱଊ͑ํ w .PCJMFBQQVTFSFYQFSJFODFT w ϞόΠϧΞϓϦͷ69ʹ͍ͭͯͷલఏ w $PNNPOBSDIJUFDUVSBMQSJODJQMFT w ΞʔΩςΫνϟʹؔ͢Δڞ௨ͷݪଇ w 3FDPNNFOEFEBQQBSDIJUFDUVSF w ΞϓϦͷਪ঑ΞʔΩςΫνϟͷৄઆ w #FTUQSBDUJDFT w ίʔυϕʔεͷݎ࿚ੑΛߴΊΔͨΊͷਪ঑ࣄ߲ ଟ෼ϝΠϯ

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(VJEFUPBQQBSDIJUFDUVSFͷུ֓ͱଊ͑ํ 3FDPNNFOEFEBQQBSDIJUFDUVSF σʔλιʔεͷந৅Խ 7JFX.PEFM ""$ 6*༻ͷσʔλ௨஌ͱϞσϧૢ࡞

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(VJEFUPBQQBSDIJUFDUVSFͷུ֓ͱଊ͑ํ %SPJE,BJHJDPOGFSFODFBQQ IUUQTHJUIVCDPN%SPJE,BJHJDPOGFSFODFBQQ

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(VJEFUPBQQBSDIJUFDUVSFͷུ֓ͱଊ͑ํ 3FDPNNFOEFEBQQBSDIJUFDUVSFͷ ΞʔΩςΫνϟΛͦͷ··औΓೖΕΔʜʁ ΞʔΩςΫνϟͷݪཧɾݪଇΛཧղ্ͨ͠Ͱ ΑΓϓϩμΫτʹద੾ͳܗΛ୳Γ͍ͨ λʔήοτ͸طଘϓϩμΫτͷϚΠάϨʔτʜ

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(VJEFUPBQQBSDIJUFDUVSFͷུ֓ͱଊ͑ํ w ඪ४తͳ"OESPJEΞϓϦ͸ɺ"DUJWJUZ'SBHNFOU 4FSWJDFͳͲͷl"QQDPNQPOFOUTz͔Βߏ੒͞ΕΔ w ͦΕΒͷίϯϙʔωϯτ͸ݸผʹॱෆಉͰىಈ͞Εɺɹ Ϣʔβʔ΍04ʹΑͬͯਵ࣌ഁغ͞ΕΔՄೳੑ͕͋Δ w σʔλ΍ঢ়ଶΛ"QQDPNQPOFOUTͰอ࣋͢΂͖Ͱͳ͍ લఏ.PCJMFBQQVTFSFYQFSJFODFT

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(VJEFUPBQQBSDIJUFDUVSFͷུ֓ͱଊ͑ํ w 4FQBSBUJPOPGDPODFSOTؔ৺ͷ෼཭ w "QQDPNQPOFOUTʹ͸6*΍04Λѻ͏ϩδοΫؚ͚ͩΊΔ w %SJWF6*GSPNBNPEFM6*ΛϞσϧͰૢ࡞͢Δ w σʔλͷ؅ཧ੹೚Λ࣋ͭج൫Λ"QQ$PNQPOFOUT͔Βɹɹ ෼཭ͤͯ͞ߏங͢ΔʢՄೳͳΒӬଓϞσϧʣ ݪଇ$PNNPOBSDIJUFDUVSBMQSJODJQMFT

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(VJEFUPBQQBSDIJUFDUVSFͷུ֓ͱଊ͑ํ w "QQ$PNQPOFOUTΛσʔλιʔεͱͯ͠ࢦఆ͠ͳ͍ w ΞϓϦͷ֤छϞδϡʔϧؒͷ੹೚ͷڥքΛ໌֬ʹఆٛ w ֤ϞδϡʔϧΛݸผʹςετͰ͖ΔΑ͏ʹ͢Δ ਪ঑ࣄ߲#FTUQSBDUJDFT

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(VJEFUPBQQBSDIJUFDUVSFͷུ֓ͱଊ͑ํ w ❌ʮཧ૝ͷઃܭύλʔϯΛςʔϒϧʹฒ΂ͯબఆʯ w ⭕ʮ՝୊Λղܾ͢ΔͨΊʹඞཁͳมߋΛߦ͏ʯ w ਓతϦιʔε΍ઃܭͷকདྷੑͳͲ΋ߟྀͭͭ͠ɺɹ ݱ࣮తͳ൑அ͕ඞཁʹͳΔ λʔήοτ͸ʮطଘϓϩμΫτͷϚΠάϨʔτʯ

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(VJEFUPBQQBSDIJUFDUVSFͷུ֓ͱଊ͑ํ ՝୊ᶃ๲ΒΜͩ7JFXͷ࣮૷΁ͷมߋ΍֦ுͷίετ ՝୊ᶄ7JFX͕࣋ͭϩδοΫͷςετ͕ଘࡏ͠ͳ͍ ՝୊ᶅը໘ճస࣌ͳͲͷ"DUJWJUZ࠶ੜ੒΁ͷऑ͞ ઃܭ໘Ͱͷ՝୊ (VJEFUPBQQBSDIJUFDUVSFͰͷݪཧɾݪଇΛࢀߟʹ ՝୊ΛղܾͰ͖Δ࠷খͷ੍໿ΛઃܭʹՃ͑Δ

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طଘΞϓϦͷઃܭվྑͷ࣮ྫ

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طଘΞϓϦͷઃܭվྑ 7JFX "DUJWJUZ'SBHNFOU .PEFM 7JFX "DUJWJUZ'SBHNFOU .PEFM

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طଘΞϓϦͷઃܭվྑ 7JFX "DUJWJUZ'SBHNFOU .PEFM 7JFX.PEFM ""$ w 7JFXϩδοΫΛ੾Γग़͢૚ͷ ৽ઃ͸ඞਢ w ͦͷ૚͸"DUJWJUZͷ࠶ੜ੒΍ ը໘ճసͳͲͷߏ੒ͷมߋʹ ڧ͍͜ͱ͕ཁ݅ 7JFX.PEFMΛ࠾༻ "OESPJE"SDIJUFDUVSF$PNQPOFOUT

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طଘΞϓϦͷઃܭվྑ 7JFX.PEFM ""$ ͸"DUJWJUZͷഁغΛ৐Γӽ͑ͳ͍ PO4BWF*OTUBODF4UBUF 7JFX.PEFM ""$ ʲࢀߟʳ"QQMJDBUJPO 4JOHMFUPO*OTUBODF ߏ੒ͷมߋʢը໘ճసͳͲʣ "DUJWJUZͷഁغ ϓϩηεͷഁغ

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w TBWFE*OTUBODF4UBUFͷߟྀΛڧ੍͢Δ7JFX.PEFMΛ ࡞੒͠ɺݪଇશͯͷ7JFX.PEFM͸͜ΕΛܧঝͤ͞Δ طଘΞϓϦͷઃܭվྑ ˞0G#VOEMFTBOE7JFX.PEFMTc1SP"OESPJE%FWࢀߟ IUUQTQSPBOESPJEEFWDPNDVTUPNJ[JOHUIFOFXWJFXNPEFMDGCBDG

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طଘΞϓϦͷઃܭվྑ ͍͔ʹ7JFX.PEFMͷอ࣋͢Δσʔλɾঢ়ଶΛ 7JFX "DUJWJUZ'SBHNFOU ʹ൓өͤ͞Δ͔ w 7JFX.PEFM͸"DUJWJUZΑΓੜଘظ͕ؒ௕͍ w ΫϥεؒͷΠϯλʔϑΣʔεΛᐆດʹͯ͠͠·͏ͱɺ ੹຿ͷ໌ྎ͞΍ߏ੒ͷมߋ΁ͷݎ࿚ੑ͕٘ਜ਼ʹʜ

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طଘΞϓϦͷઃܭվྑ 7JFX "DUJWJUZ'SBHNFOU 7JFX.PEFM ""$ .PEFM ͜͜ͷΠϯλʔϑΣʔεʹ ੍໿ɾϧʔϧΛઃ͚Δ

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طଘΞϓϦͷઃܭվྑ Πϕϯτʢشൃੑʣ ঢ়ଶʢෆشൃੑʣ w ը໘ભҠ w μΠΞϩάͷදࣔ w 5PBTU4OBDLCBSͷදࣔ w ಡΈࠐΈதͷεςʔλε w ը໘ͷදࣔ಺༰ ˢͬ͘͟Γݴ͏ͱ ʮϨΠΞ΢τʹ൓өͰ͖Δ΋ͷʯ 7JFXʹ൓ө͢Δ΋ͷ

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طଘΞϓϦͷઃܭվྑ Πϕϯτʢشൃੑʣ ୯ൃͷ௨஌ʹ࠷దԽͨ͠-JWF%BUB w 4JOHMF-JWF&WFOUʢ"SDIJUFDUVSF#MVFQSJOUTΑΓʣ w "DUJWJUZ'SBHNFOUͷϥΠϑαΠΫϧʹԠͨ͡ɹ σʔλ௨஌ʹదͨ͠ʮ-JWF%BUBʯΛܧঝͨ͠΋ͷ w ߏ੒ͷมߋޙʹ࠶౓PCTFSWFͯ͠΋௨஌͞Εͳ͍

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طଘΞϓϦͷઃܭվྑ

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طଘΞϓϦͷઃܭվྑ 5JQTΠϕϯτΛෳ਺0CTFSWFSͰ؂ࢹ͍ͨ࣌͠͸ʜʁ w 4JOHMF-JWF&WFOU͸࢖༻ෆՄ w ෳ਺ͷ0CTFSWFSͷ಺ɺҰ͚ͭͩʹ௨஌͞ΕΔڍಈ w 7JFX.PEFM͔Βͷ୯ൃͷΠϕϯτ௨஌ʹ͍ͭͯɹɹ 4JOHMF-JWF&WFOUͱ͸ผͷख๏΋ଘࡏ͢ΔͷͰཁࢀর ˞-JWF%BUBXJUI4OBDL#BS /BWJHBUJPOBOEPUIFSFWFOUTc"OESPJE%FWFMPQFST.FEJVNࢀߟ

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طଘΞϓϦͷઃܭվྑ ঢ়ଶʢෆشൃੑʣ %BUB#JOEJOHͰ൓ө w ϨΠΞ΢τͷߋ৽͸ݪଇ%BUB#JOEJOHܦ༝ w 6*Πϕϯτ΋%BUB#JOEJOHͰ7JFX.PEFMʹ௨஌

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طଘΞϓϦͷઃܭվྑ Πϕϯτʢشൃੑʣ 4JOHMF-JWF&WFOUͰ໋ྩ ঢ়ଶʢෆشൃੑʣ %BUB#JOEJOHͰ൓ө 7JFX "DUJWJUZ'SBHNFOU 7JFX.PEFM ""$ .PEFM

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طଘΞϓϦͷઃܭվྑ 7JFX "DUJWJUZ'SBHNFOU ͷ࣮૷͕࠷খݶʹ

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طଘΞϓϦͷઃܭվྑ w "DUJWJUZ'SBHNFOU͸4JOHMF-JWF&WFOUͷએݴతͳ ؂ࢹͱ%BUB#JOEJOHͷॳظԽΛߦ͏͚ͩ w ߏ੒ͷมߋ࣌΋ϨΠΞ΢τͷදࣔঢ়ଶ͕෮ݩ͞ΕΔ w ෳࡶͳΞχϝʔγϣϯͷ࣮૷ͳͲ͕๲ΒΜͰ΋ɺɹɹ 7JFXͷ࣮૷͕ഁ୼͢Δ͜ͱ͸ͳͦ͞͏ʜʁ 7JFX "DUJWJUZ'SBHNFOU ͷ࣮૷͕࠷খݶʹ

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طଘΞϓϦͷઃܭվྑ ՝୊ᶃ๲ΒΜͩ7JFXͷ࣮૷΁ͷมߋ΍֦ுͷίετ ՝୊ᶄ7JFX͕࣋ͭϩδοΫͷςετ͕ଘࡏ͠ͳ͍ ՝୊ᶅը໘ճస࣌ͳͲͷ"DUJWJUZ࠶ੜ੒΁ͷऑ͞ ઃܭ໘Ͱͷ՝୊ ઃܭ໘Ͱͷ՝୊ͷղܾΛ௨ͯ͠ɺ (VJEFUPBQQBSDIJUFDUVSFͷݪଇʹ४ڌͰ͖ͨʁ

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طଘΞϓϦͷઃܭվྑ .PEFM 7JFX "DUJWJUZ'SBHNFOU ஈ֊తͳ Ҡߦ͕༰қ 7JFX "DUJWJUZ'SBHNFOU 7JFX.PEFM ""$

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αϯϓϧΞϓϦ OBLBNVVVKFUQBDLBSDIJUFDUVSFQMBZHSPVOE IUUQTHJUIVCDPNOBLBNVVVKFUQBDLBSDIJUFDUVSFQMBZHSPVOE

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αϯϓϧΞϓϦ w &$ܥΞϓϦʹΑ͋͘Δݸਓ৘ใͷ ೖྗը໘͕୊ࡐ w ϥΫϚͷ࿈བྷઌɾॅॴͷઃఆը໘ Ͱ΋ಉ༷ͷઃܭʹมߋࡁΈ w "DUJWJUZͷ࠶ੜ੒ɾߏ੒ͷมߋʹ ର͢Δڧ͞΋֬อͰ͖ͨɻ

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·ͱΊ

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·ͱΊ w طଘΞϓϦͷઃܭվྑʹ͍ͭͯͭͷ࣮ྫΛࣔͨ͠ɻ w ઈରతͳਖ਼ղͰ͸ͳ͍͕ɺઃܭʹ੍໿Λ΋ͨΒ͢ɹ ͜ͱͰղফͰ͖ͨ՝୊͸ଟ͔ͬͨɻ w "OESPJEϓϥοτϑΥʔϜ͕஀ੜͯ͠೥ɻɹɹɹɹ ࣅͨΑ͏ͳ՝୊Λ࣋ͭϓϩμΫτ΋૿͑ͯ͘ΔͷͰ͸ʁ ͥͻօ͞ΜͷϓϩμΫτͰͷ࣮ྫ΋ฉ͔͍ͤͯͩ͘͞ʜʂ

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͝ਗ਼ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠ʂ