potatotips #56 (iOS/Android開発Tips共有会)

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1. Copyright © ZOZO Technologies, Inc. All Right Reserved. גࣜձࣾ;0;0ςΫϊϩδʔζ
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2. ϓϩϑΟʔϧ 5XJUUFS ;0;0ςΫϊϩδʔζ
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   ঘޗ Copyright © ZOZO Technologies, Inc. All Right Reserved. !ZTIPHP (JUIVC !ZTIPHP ݸਓͰ͸'MVUUFSʹϋϚ͍ͬͯΔ
3. Copyright © ZOZO Technologies, Inc. All Right Reserved. ࠓ೔࿩͢͜ͱ ɾ,PUMJO
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4. Copyright © ZOZO Technologies, Inc. All Right Reserved. ,PUMJO
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5. Copyright © ZOZO Technologies, Inc. All Right Reserved.
6. Copyright © ZOZO Technologies, Inc. All Right Reserved. ,PUMJO
   $PSPVUJOFͬͯͳʹʁʁ XJLJQFEJBͰ$PSPVUJOFΛݕࡧ͢Δͱ
   αϒϧʔνϯ͕ΤϯτϦʔ͔ΒϦλʔϯ·ͰΛҰͭͷॲཧ୯Ґͱ͢Δͷʹର ͠ɺίϧʔνϯ͸͍ͬͨΜॲཧΛதஅͨ͠ޙɺଓ͖͔ΒॲཧΛ࠶։Ͱ͖Δɻ ઀಄ࣙ
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   ͸ڠௐΛҙຯ͢Δ͕ɺෳ਺ͷίϧʔνϯ͕தஅɾܧଓʹΑΓڠௐ ಈ࡞Λߦ͏͜ͱʹΑΔɻ
7. Copyright © ZOZO Technologies, Inc. All Right Reserved.
8. Copyright © ZOZO Technologies, Inc. All Right Reserved. ,PUMJO
   $PSPVUJOFͬͯͳʹʁʁ ʮதஅՄೳͳܭࢉॲཧΠϯελϯεʯ
9. Copyright © ZOZO Technologies, Inc. All Right Reserved.
10. Copyright © ZOZO Technologies, Inc. All Right Reserved. ,PUMJO
    $PSPVUJOFͬͯͳʹʁʁ ཁ͸ ؔ਺ͷ్தͰதஅͤͨ͞Γɺ࠶։ͨ͠Γ͢Δ΍ͭ
11. Copyright © ZOZO Technologies, Inc. All Right Reserved. ,PUMJO
    $PSPVUJOFͬͯͳʹʁʁ "OESPJEͰ͸
    ɾඇಉظॲཧͷ଴ͪ߹Θͤ
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    ɾ͍ΖΜͳඇಉظॲཧΛҰؾʹࢭΊΔ
    ͞·͟·ͳඇಉظॲཧΛ؅ཧ͢Δ΋ͷͱߟ͍͍͑ͯ
12. Copyright © ZOZO Technologies, Inc. All Right Reserved. ,PUMJO
    $PSPVUJOFͬͯͳʹʁʁ 3Y+BWBͷ୅ସ͑Ͱ͸ͳ͍
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    σʔλϑϩʔΛએݴతʹॻ͘ϦΞΫςΟϒϓϩάϥϛϯά $PSPVUJOF
    தஅՄೳܭࢉΠϯελϯε
13. Copyright © ZOZO Technologies, Inc. All Right Reserved. ࢖͍ํ fun main() { GlobalScope.launch { delay(1000L) println("World!") } println("Hello,") Thread.sleep(2000L) }
14. Copyright © ZOZO Technologies, Inc. All Right Reserved. ࢖͍ํ 5JNFPVU fun main() = runBlocking { //sampleStart withTimeout(1300L) { repeat(1000) { i -> println("I'm sleeping $i ...") delay(500L) } } //sampleEnd }
15. ࢖͍ํ ଴ͪ߹Θͤ fun main() = runBlocking<Unit> { //sampleStart val time = measureTimeMillis { println("The answer is ${concurrentSum()}") } println("Completed in $time ms") //sampleEnd } suspend fun concurrentSum(): Int = coroutineScope { val one = async { doSomethingUsefulOne() } val two = async { doSomethingUsefulTwo() } one.await() + two.await() } suspend fun doSomethingUsefulOne(): Int { delay(1000L) // pretend we are doing something useful here return 13 } suspend fun doSomethingUsefulTwo(): Int { delay(1000L) // pretend we are doing something useful here, too return 29 }
16. Copyright © ZOZO Technologies, Inc. All Right Reserved. // retorofit implementation 'com.jakewharton.retrofit:retrofit2-kotlin-coroutines-adapter:0.9.2' // coroutines implementation "org.jetbrains.kotlinx:kotlinx-coroutines-core:1.0.1" implementation "org.jetbrains.kotlinx:kotlinx-coroutines-android:1.0.1" ˞,PUMJO
    ͔ΒͷઃఆͰ͢ ઃఆ "OESPJEͰͲ͏࢖͏ͷ͔
17. Copyright © ZOZO Technologies, Inc. All Right Reserved. interface MainService { companion object { const val baseUrl = “URL" } @GET(“/id“) fun getUser(): Deferred<Response<Main>> } 3FUSPpUͱҰॹʹ࢖͏ "OESPJEͰͲ͏࢖͏ͷ͔
18. Copyright © ZOZO Technologies, Inc. All Right Reserved. fun getUserInfo() = Retrofit.Builder() .baseUrl(MainService.baseUrl) .addConverterFactory(MoshiConverterFactory.create()) .addCallAdapterFactory(CoroutineCallAdapterFactory()) .build().create(MainService::class.java) } 3FUSPpUͱҰॹʹ࢖͏ "OESPJEͰͲ͏࢖͏ͷ͔
19. Copyright © ZOZO Technologies, Inc. All Right Reserved. "OESPJEͰͲ͏࢖͏ͷ͔ GlobalScope.launch { val info = repository.getUserInfo() val userRequest = info.getUser() val userResponse = userRequest.await() if (!userResponse.isSuccessful) { ɹɹɹɹɹɹɹɹɹ// ΤϥʔॲཧΛ࣮ߦ͢Δ return@launch } userModel.set(userResponse.body() ?: return@launch) } 3FUSPpUͱҰॹʹ࢖͏
20. Copyright © ZOZO Technologies, Inc. All Right Reserved. ·ͱΊ ɾ$PSPVUJOFͱ͸ʮؔ਺ͷ్தͰதஅͤͨ͞Γɺ ࠶։ͨ͠Γ͢Δ΍ͭʯ
    ɾ3Y+BWBͷ୅ସ͑Ͱ͸ͳ͍
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21. Copyright © ZOZO Technologies, Inc. All Right Reserved. ίϧʔνϯΛੵۃతʹಋೖ͍ͯͧ͘͠ʂʂ
22. Copyright © ZOZO Technologies, Inc. All Right Reserved. ͝੩ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠