チーム開発と Android アプリの構成

νʔϜ։ൃͱ"OESPJEΞϓϦͷߏ੒ ୈճελʔτΞοϓ"OESPJEษڧձ ελʔτΞοϓʹ͓͚ΔΞʔΩςΫνϟͱͷ޲͖߹͍ํ

ٶԼཽେ࿠ $IBU8PSLגࣜձࣾ ΞϓϦέʔγϣϯ։ൃ෦νʔϜϦʔμʔ !SZVHPP@

"OESPJEΞϓϦͷߏ੒ ΞʔΩςΫνϟ ύοέʔδߏ੒

ΞʔΩςΫνϟ .7$ .71 .77. 'MVY 7*1&3 $MFBO"SDIJUFDUVSF FUD

ϥΠϑαΠΫϧʹண໨͢ΔΞʔΩςΫνϟ ‣ 3Y+BWB΍&WFOU#VTΛ࢖͍ͬͯΕ͹ҙࣝ͢Δ͸ͣ PO4UBSUPO4UPQͰTVCTDSJCFVOTVCTDSJCF ߪಡ͕ഁغ͞Εͨͱ͖ͷ؂ࢹର৅ͷద੾ͳഁغ ‣ ϥΠϑαΠΫϧʹண໨͢Δͱ͞Βʹҙࣝ͢Δ͜ͱ
໾ׂͷ෼཭ ը໘ͱ৘ใ ৘ใͱϩδοΫ ϩδοΫͱӬଓԽػߏ

"OESPJE"SDIJUFDUVSF$PNQPOFOUT ‣ (PPHMF*0Ͱൃද͞Εͨ ‣ (PPHMFͷߟ͑ΔਪનΞʔΩςΫνϟ ‣ "DUJWJUZ'SBHNFOUͷϥΠϑαΠΫϧʹண໨ ؍ଌՄೳͳϥΠϑαΠΫϧͱඥ෇͘σʔλ -JGFDZDMF-JWF%BUB
ը໘ճసʹӨڹ͞Εͳ͍σʔλͷอ࣋ 7JFX.PEFM σʔλͷӬଓԽΛखॿ͚͢Δ 3PPN1FSTJTUFODF-JCSBSZ

ΞʔΩςΫνϟ͸ࣅͯ͘Δ ‣ "DUJWJUZ'SBHNFOU$VTUPN7JFX 7JFX6*ͷ੍ޚʹूத͢Δ ‣ 7JFX.PEFM 7JFXͷͨΊͷ஋Λอ࣋͢Δ
7JFXͱϏδωεϩδοΫͷڮ౉͠ ‣ #VTJOFTT-PHJD ஋ΦϒδΣΫτ ϏδωεϩδοΫ

7JFX 7JFX.PEFM #VTJOFTT-PHJD ‣ 3Y+BWB ‣ JOUFSGBDF ‣ &WFOU#VT

"OESPJEͷ7JFX͸΍΍͍͜͠ ‣ "DUJWJUZ 'SBHNFOU %JBMPH'SBHNFOU #PUUPN4IFFU $VTUPN7JFX ‣
ը໘಺ͷίϯϙʔωϯτಉ࢜΋௨৴͕ඞཁ 7JFX.PEFMΛͲͷΑ͏ʹ࢖͏͔ %BUB#JOEJOHͱͲ͏૊Έ߹ΘͤΔ͔

7JFX.PEFMΛͲͷΑ͏ʹ࢖͏͔ ‣ Ϣʔβʔ͕ݟ͍ͯΔlը໘zʹؔ৺Λ޲͚Δ ʷ )PHF"DUJWJUZ⾮)PHF"DUJWJUZ7JFX.PEFM ̋ )PHF"DUJWJUZ )PHF'SBHNFOU )PHF$VTUPN7JFX )PHF7JFX.PEFM
lը໘z΁ͷؔ৺ʹରͯ͠7JFX.PEFM͕͋Δ ۃྗ"OESPJE౎߹ʹҾͬுΒΕͨ͘ͳ͍

7JFX.PEFMΛͲͷΑ͏ʹ࢖͏͔ ‣ "OESPJE"SDIJUFDUVSF$PNQPOFOUT 7JFX.PEFM1SPWJEFSTܦ༝Ͱڞ༗Ͱ͖Δ class MyFragment: Fragment() { val
viewModel: MyViewModel by lazy { ViewModelProviders.of(activity) .get(MyViewModel::class.java) } }

%BUB#JOEJOHͱͲ͏૊Έ߹ΘͤΔ͔ ‣ ֤ϨΠΞ΢τͱ7JFX.PEFMΛόΠϯυ 7JFX.PEFM͸ը໘ͷτοϓίϯϙʔωϯτ͔Βऔಘ <?xml version="1.0" encoding="utf-8"?> <layout> <data>
<variable name="hogeViewModel" type="com.example.view.hoge.HogeViewModel"/> </data> </layout>

%BUB#JOEJOHͱͲ͏૊Έ߹ΘͤΔ͔ ‣ 0CTFSWBCMF'JFMEͳͲ࢖ͬͯ૒ํ޲όΠϯυ <TextView android:text="@={hogeViewModel.textValue}"> data class HogeViewModel( val textValue:
ObservableField<String> = ObservableField() )

7JFXͱ7JFX.PEFM )PHF "DUJWJUZ )PHF 'SBHNFOU )PHF 7JFX l)PHFz %BUB#JOEJOH l)PHF7JFX.PEFMz
0CTFSWBCMF'JFME SY0CTFSWBCMF $PNNBOE &WFOU

೰Έ ‣ Ϣʔβʔ͕ݟ͍ͯΔlը໘zʹؔ৺Λ޲͚Δ Ͳ͜·Ͱ͕ಉ͡ίϯςΩετͷը໘ͳͷ͔ )PHF"DUJWJUZ͕ΞΫςΟϒͰ͋Ε͹ɺ  ͦ͜ʹදࣔ͞ΕΔ΋ͷ͸ಉ͡ίϯςΩετʁ ྫ͑͹l%JBMPH'SBHNFOUz͸Ͳ͏ͩΖ͏ʁ
)PHF7JFX.PEFMΛ࣋ͭ΂͖͔൱͔ ઐ༻ͷ7JFX.PEFM͕͋ͬͨํ͕ྑ͍ͷ͔ දࣔ͞ΕΔ%JBMPHͷத਎Ͱ΋มΘΓͦ͏͚ͩͲ΋ ʅЏʆʀ řŖƃʜ

ύοέʔδߏ੒

ύοέʔδߏ੒ ‣ "OESPJEΞϓϦͷύοέʔδߏ੒͸ࣗ༝౓͕ߴ͍ ϓϩδΣΫτσϑΥϧτͰ͸.BJO"DUJWJUZ͕  ύοέʔδ௚Լʹυʔϯͱஔ͔Ε͍ͯΔ ‣ ྫ͑͹044ͳ"OESPJEϓϩδΣΫτͰ͸ʁ - root
- ui - activities - fragments - views - viewmodels - root - ui - Activity.java - Fragment.java - model - utils

Ͳ͜ʹ஫໨͢Δ͔ ‣ ύοέʔδߏ଄ΛͲ͏෼ׂ͢Δ͔ lVJz΍lNPEFMzʹ෼͚Δͷ͸ྑ͋͘Δ ෼͔Γ΍͍͢ ‣ Ͱ΋
lBDUJWJUZzͳͲͰ෼͚͍ͯ͘ͷ͕ຊ౰ʹྑ͍ͷ͔ lը໘zʹண໨͢Δͱίʔυ͕෼ࢄͯ͘͠Δ ͞ΒʹlWJFXNPEFMz΋ग़ͯ͘Δͱʜʜʁ ̻̻̻ƅЧƅ űŘŎŎŎ

ఏҊ ‣ Ϣʔβʔ͕ண໨͢Δը໘Λߏ੒͢ΔཁૉͰ·ͱΊΔ - root - ui - hoge -
HogeActivity.kt - HogeFragment.kt - HogeCustomView.kt - HogeViewModel.kt - fuga - ……

ఏҊ ‣ ϝϦοτ ύοέʔδϓϥΠϕʔτʹͰ͖Δ ը໘Λߏ੒͢ΔཁૉͰ·ͱΊΒΕΔͷͰࢄΒ͹Βͳ͍ (JU)VCͷ3FQPTJUPSZ7JFXFSͰݟΔͱ͖΋ָʑ ‣
σϝϦοτ ࢥ͍͔ͭͳ͍ʂ

ʹΌΜͳΜͷͨΊʹ

ͳͥlΞʔΩςΫνϟzʹ஫໨͢Δͷ͔ ‣ ਓͳΒ ଟ෼ ͲΜͳܗͰ΋໰୊͸ͳ͍ ਓ ਓʜʜνʔϜʹͳ͖ͬͯͨΒʁ டং͕ඞཁ
ΞʔΩςΫνϟ͸டং νʔϜͷͨΊʹΞʔΩςΫνϟ͕͋Δ ‣ டং͕ͳ͍ͱͲ͏ͳΔͷ͔ ։ൃ଎౓͕མͪɺόά΋ੜ·ΕɺΧΦεʹͳΔ Ϣʔβʔ΁ͷՁ஋ఏڙ͕ૄ͔ʹͳΔ

ελʔτΞοϓͱΞʔΩςΫνϟ ‣ Ϗδωε͸੒ޭ͢Δ͔෼͔Βͳ͍ ϐϘοτ͢Δ͜ͱ΋͋Δ ૉૣ͘։ൃͯ͠ɺՁ஋ͷݕূΛߦ͍͍ͨ Ͱ΋ɺϢʔβʔͷ໨͸ͱͯ΋੒ख़͍ͯ͠Δ ͸͡Ί͔Βҙਤ͢ΔػೳΛਖ਼͘͠ಈ࡞ͤ͞Δඞཁ͕͋Δ
ૉૣ͍։ൃWTਖ਼͘͠ಈ࡞͢ΔϓϩάϥϜ ΞʔΩςΫνϟʹΑͬͯடংΛखʹೖΕΑ͏ டংʹΑͬͯϢʔβʔ΁ͷՁ஋ఏڙΛखॿ͚͢Δ

டং͋Δ։ൃΛߦ͏஥ؒΛ୳͍ͯ͠·͢ ‣ $IBU8PSLͰ͸"OESPJEJ04ΤϯδχΞΛืूத ΞʔΩςΫνϟͱڞʹ͋Δ։ൃΛ͠·ͤΜ͔ʁ ౦ژΦϑΟεେࡕΦϑΟε ౦ژΦϑΟε͸݄ʹ౦ژλϫʔͦ͹ʹҠస͠·͢ ࠓ͸ઙ૲ ͔ͬͺڮಓ۩֗ͷத
ʹ͋Γ·͢ IUUQDPSQDIBUXPSLDPNKBSFDSVJUFOHJOFFS

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チーム開発と Android アプリの構成

チーム開発と Android アプリの構成

Ryutaro Miyashita

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νʔϜ։ൃͱ"OESPJEΞϓϦͷߏ੒ ୈճελʔτΞοϓ"OESPJEษڧձ ελʔτΞοϓʹ͓͚ΔΞʔΩςΫνϟͱͷ޲͖߹͍ํ

ٶԼཽେ࿠ $IBU8PSLגࣜձࣾ ΞϓϦέʔγϣϯ։ൃ෦νʔϜϦʔμʔ !SZVHPP@

ߏ੒

"OESPJEΞϓϦͷߏ੒ ΞʔΩςΫνϟ ύοέʔδߏ੒

ΞʔΩςΫνϟ .7$ .71 .77. 'MVY 7*1&3 $MFBO"SDIJUFDUVSF FUD

ϥΠϑαΠΫϧʹண໨͢ΔΞʔΩςΫνϟ ‣ 3Y+BWB΍&WFOU#VTΛ࢖͍ͬͯΕ͹ҙࣝ͢Δ͸ͣ PO4UBSUPO4UPQͰTVCTDSJCFVOTVCTDSJCF ߪಡ͕ഁغ͞Εͨͱ͖ͷ؂ࢹର৅ͷద੾ͳഁغ ‣ ϥΠϑαΠΫϧʹண໨͢Δͱ͞Βʹҙࣝ͢Δ͜ͱ

"OESPJE"SDIJUFDUVSF$PNQPOFOUT ‣ (PPHMF*0Ͱൃද͞Εͨ ‣ (PPHMFͷߟ͑ΔਪનΞʔΩςΫνϟ ‣ "DUJWJUZ'SBHNFOUͷϥΠϑαΠΫϧʹண໨ ؍ଌՄೳͳϥΠϑαΠΫϧͱඥ෇͘σʔλ -JGFDZDMF-JWF%BUB

ΞʔΩςΫνϟ͸ࣅͯ͘Δ ‣ "DUJWJUZ'SBHNFOU$VTUPN7JFX 7JFX6*ͷ੍ޚʹूத͢Δ ‣ 7JFX.PEFM 7JFXͷͨΊͷ஋Λอ࣋͢Δ

7JFX 7JFX.PEFM #VTJOFTT-PHJD ‣ 3Y+BWB ‣ JOUFSGBDF ‣ &WFOU#VT

7JFX 7JFX.PEFM #VTJOFTT-PHJD ‣ 3Y+BWB ‣ JOUFSGBDF ‣ &WFOU#VT

"OESPJEͷ7JFX͸΍΍͍͜͠ ‣ "DUJWJUZ 'SBHNFOU %JBMPH'SBHNFOU #PUUPN4IFFU $VTUPN7JFX ‣

7JFX.PEFMΛͲͷΑ͏ʹ࢖͏͔ ‣ Ϣʔβʔ͕ݟ͍ͯΔlը໘zʹؔ৺Λ޲͚Δ ʷ )PHF"DUJWJUZ⾮)PHF"DUJWJUZ7JFX.PEFM ̋ )PHF"DUJWJUZ )PHF'SBHNFOU )PHF$VTUPN7JFX )PHF7JFX.PEFM

7JFX.PEFMΛͲͷΑ͏ʹ࢖͏͔ ‣ "OESPJE"SDIJUFDUVSF$PNQPOFOUT 7JFX.PEFM1SPWJEFSTܦ༝Ͱڞ༗Ͱ͖Δ class MyFragment: Fragment() { val

%BUB#JOEJOHͱͲ͏૊Έ߹ΘͤΔ͔ ‣ ֤ϨΠΞ΢τͱ7JFX.PEFMΛόΠϯυ 7JFX.PEFM͸ը໘ͷτοϓίϯϙʔωϯτ͔Βऔಘ <?xml version="1.0" encoding="utf-8"?> <layout> <data>

%BUB#JOEJOHͱͲ͏૊Έ߹ΘͤΔ͔ ‣ 0CTFSWBCMF'JFMEͳͲ࢖ͬͯ૒ํ޲όΠϯυ <TextView android:text="@={hogeViewModel.textValue}"> data class HogeViewModel( val textValue:

7JFXͱ7JFX.PEFM )PHF "DUJWJUZ )PHF 'SBHNFOU )PHF 7JFX l)PHFz %BUB#JOEJOH l)PHF7JFX.PEFMz

೰Έ ‣ Ϣʔβʔ͕ݟ͍ͯΔlը໘zʹؔ৺Λ޲͚Δ Ͳ͜·Ͱ͕ಉ͡ίϯςΩετͷը໘ͳͷ͔ )PHF"DUJWJUZ͕ΞΫςΟϒͰ͋Ε͹ɺ  ͦ͜ʹදࣔ͞ΕΔ΋ͷ͸ಉ͡ίϯςΩετʁ ྫ͑͹l%JBMPH'SBHNFOUz͸Ͳ͏ͩΖ͏ʁ

ύοέʔδߏ੒

ύοέʔδߏ੒ ‣ "OESPJEΞϓϦͷύοέʔδߏ੒͸ࣗ༝౓͕ߴ͍ ϓϩδΣΫτσϑΥϧτͰ͸.BJO"DUJWJUZ͕  ύοέʔδ௚Լʹυʔϯͱஔ͔Ε͍ͯΔ ‣ ྫ͑͹044ͳ"OESPJEϓϩδΣΫτͰ͸ʁ - root

Ͳ͜ʹ஫໨͢Δ͔ ‣ ύοέʔδߏ଄ΛͲ͏෼ׂ͢Δ͔ lVJz΍lNPEFMzʹ෼͚Δͷ͸ྑ͋͘Δ ෼͔Γ΍͍͢ ‣ Ͱ΋

ఏҊ ‣ Ϣʔβʔ͕ண໨͢Δը໘Λߏ੒͢ΔཁૉͰ·ͱΊΔ - root - ui - hoge -

ఏҊ ‣ ϝϦοτ ύοέʔδϓϥΠϕʔτʹͰ͖Δ ը໘Λߏ੒͢ΔཁૉͰ·ͱΊΒΕΔͷͰࢄΒ͹Βͳ͍ (JU)VCͷ3FQPTJUPSZ7JFXFSͰݟΔͱ͖΋ָʑ ‣

ʹΌΜͳΜͷͨΊʹ

ͳͥlΞʔΩςΫνϟzʹ஫໨͢Δͷ͔ ‣ ਓͳΒ ଟ෼ ͲΜͳܗͰ΋໰୊͸ͳ͍ ਓ ਓʜʜνʔϜʹͳ͖ͬͯͨΒʁ டং͕ඞཁ

ελʔτΞοϓͱΞʔΩςΫνϟ ‣ Ϗδωε͸੒ޭ͢Δ͔෼͔Βͳ͍ ϐϘοτ͢Δ͜ͱ΋͋Δ ૉૣ͘։ൃͯ͠ɺՁ஋ͷݕূΛߦ͍͍ͨ Ͱ΋ɺϢʔβʔͷ໨͸ͱͯ΋੒ख़͍ͯ͠Δ ͸͡Ί͔Βҙਤ͢ΔػೳΛਖ਼͘͠ಈ࡞ͤ͞Δඞཁ͕͋Δ

டং͋Δ։ൃΛߦ͏஥ؒΛ୳͍ͯ͠·͢ ‣ $IBU8PSLͰ͸"OESPJEJ04ΤϯδχΞΛืूத ΞʔΩςΫνϟͱڞʹ͋Δ։ൃΛ͠·ͤΜ͔ʁ ౦ژΦϑΟεେࡕΦϑΟε ౦ژΦϑΟε͸݄ʹ౦ژλϫʔͦ͹ʹҠస͠·͢ ࠓ͸ઙ૲ ͔ͬͺڮಓ۩֗ͷத

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