2017೥ʹ৽نΞϓϦ Λ্ཱͪ͛ͨ࿩ Keisuke Kobayashi (@kobakei) shibuya.apk #20 

About Me • Keisuke Kobayashi • GitHub, Qiita: kobakei • Twitter: kobakei122 • Kyash, Inc • ݸਓࣄۀओ΋΍ͬͯ·͢ 

2017೥ʹ৽͘͠ΞϓϦΛ
 ্ཱͪ͛ͨ࿩Λ͠·͢ 

Kyash • ݸਓؒૹۚαʔϏε • 2017೥4݄ʹiOS൛ϦϦʔε • 2017೥7݄ʹAndroid൛ϦϦʔε 

Kyash • ݸਓؒૹۚαʔϏε • 2017೥4݄ʹiOS൛ϦϦʔε • 2017೥5݄ʹԶೖࣾ • 2017೥7݄ʹAndroid൛ϦϦʔε 

2͔݄ͪΐͬͱͰϦϦʔε • AndroidΤϯδχΞ1ਓ • େମ40ը໘ • αʔόʔͷAPI͸͢Ͱʹ͋Δ • ͍͔ʹͯ͠ϦϦʔε͔ͨ͠ 

Kotlin • Google I/Oલʹ࠾༻ • Kotlinͷํ͕։ൃ଎౓ૣ͍Β͍͠ͱ͍͏ᷚ • ษڧ͠ͳ͕Βॻ͖͢͢ΊΔ • Better Javaͱͯ͠ॻ͚ͩ͘ͳΒ͙͢׳ΕΔ 

࣮ࡍͲ͏͔ͩͬͨ • λΠϓྔ͕ݮͬͨ • Data class • Delegated property • NPE͕ݮͬͨ • Nullڐ༰ or ඇڐ༰ 

ྫ: Delegated property class MainActivity : AppCompatActivity { companion object { fun createIntent(context: Context, hoge: String?, fuga: Int): Intent { return Intent(context, MainActivity::class.java).apply { putExtra(MainActivity::hoge.name, hoge) putExtra(MainActivity::fuga.name, fuga) } } } val hoge: String? by ExtraNullable() val fuga: Int by ExtraNonNull() } 

ࠔͬͨͱ͜Ζ • είʔϓؔ਺ͷ࢖͍ํʹ໎ͬͨ • ࠷ۙ͸ͨΖ͏͞Μͷϑϩʔνϟʔτʹै͏ • ParcelizeΛಋೖͨ͠ΒJBͰىಈ͠ͳ͘ͳͬͨ • ͋͘·ͰExperimentalͳͷͰ஫ҙ 

ઃܭ • MVVM + ϨΠϠʔυΞʔΩςΫνϟ • Data binding • ֤֊૚ΛRxJavaͰͭͳ͙ • ϥΠϑαΠΫϧʹԠͯ͡dispose͞ΕΔ࢓૊ Έ 

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ϥΠϒϥϦ • ͍͍ͩͨఆ൪Λ࢖͍ͬͯΔ • ϒϩάʹ·ͱΊ·ͨ͠ • Android։ൃʹ͓͚Δఆ൪ϥΠϒϥϦ22બ 

ఆ൪Ҏ֎ʹศརͬΆ͍΋ͷ • DeepLinkDispatch • Airbnb࡞ɻΞϊςʔγϣϯͰσΟʔϓϦϯΫͷίʔυΛࣗಈੜ ੒ • debot • ϝϧΧϦͷࠓҪ͞Μ࡞ɻ୺຤ΛৼͬͯσόοάϝχϡʔΛग़͢ • MaterialChipsInput • GmailͷѼઌબ୒UIͬΆ͍ΞϨ 

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Architecture Components • ։ൃ౰࣌·ͩbetaͩͬͨͷͰ࢖Θͳ͔ͬͨ • RxLifecycleͬΆ͍࢓૊ΈΛࣗ࡞ͨ͠ • ͍͍ײ͡ʹCompositeDisposableʹadd͢Δ ࢓૊Έ • ORM͸OrmaΛ࢖ͬͨ 

ࣗ࡞ͨ͠ϥΠϒϥϦ • FabSpeedDial • طଘͷϥΠϒϥϦ͕ඍົͩͬͨͷͰ࡞ͬͨ • ͍͔ͭ͘ͷUIϥΠϒϥϦ͸forkͨ͠ • UIϥΠϒϥϦ͸์ஔ͞Ε͕ͪ 

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ςετ • ୯ମςετ • Rolectric + mockito-kotlin • Mockito-kotlin͸͍͍ͧ • UIςετ • ͪΐͬͱԿݴͬͯΔ͔Θ͔Βͳ͍Ͱ͢ 

Mockito-kotlin val mock = mock { on { hoge() } doReturn "hoge" on { fuga() } doReturn "fuga" } 

·ͱΊ • Kyash Android൛ͷ։ൃΛࢧٕ͑ͨज़Λ঺հ͠·ͨ͠ • Kotlin • ઃܭ • ϥΠϒϥϦ • ςετ 

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