DroidKaigi2017 - https://droidkaigi.github.io/2017/ day2 AM10:40-11:30 Room1 の発表資料です。
Xamarin.AndroidͰ࢝ΊΔ ΫϩεϓϥοτϑΥʔϜ ϞόΠϧΞϓϦ։ൃ2017.3.10 DroidKaigi2017@amay077
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About me• Ԟࢁ ༟ਈ - @amay077ʢ͋Ί͍ʣ• ۀܥϓϩάϥϚ+α• ѪݝࡏॅͷϑϧϦϞʔτϫʔΧʔ• ཧใγεςϜɺҐஔใϓϩάϥϛϯά• Android, iOS, Xamarin, Java, C#, Salesforce
Work for• B2B͚PaaSɺݿཧɾӡૹۀ͚SaaS• AWS, Elasticsearch, Cassandra, Lambda, etc• શһ͕ϑϧϦϞʔτϫʔΧʔ͓ࣄ༰ϦϞʔτͰͷಇ͖ํͳͲڵຯ͋Δํɺؾܰʹฉ͍͍ͯͩ͘͞
Target• Androidॳʙதڃऀ• iOSΞϓϦ։ൃͯ͠Δʗͦ͠͏ͳਓ• Xamarinͬͯฉ͍ͨ͜ͱ͋Δ͚Ͳ࣮ࡍԿͳͷʁͱࢥͬͯΔਓ• .NETܥͷ։ൃ͋·Γͨ͠ࣄ͕ͳ͍ਓ
Agenda1. Xamarinͱʁ2. ௨ৗͷAndroid։ൃͱͷҧ͍3. C#ͷར4. X-PlatΞϓϦ։ൃͱίʔυͷڞ༗5. Xamarinͷ͍Ͳ͜Ζ
Xamarinͱʁ⏰ 45
Xamarinͱʁ/&5ϑϨʔϜϫʔΫʢ.POPʣ9BNBSJO"OESPJE 9BNBSJOJ04 9BNBSJO.BD9BNBSJO'PSNTMono(.NETϑϨʔϜϫʔΫͷOSS࣮)Λج൫ͱͨ͠։ൃπʔϧΩοτ܈
Xamarin.Androidͱʁ• C#͔ΒAndroid API, Java API͕ݺͼग़ͤΔʮബ͍ϥούʔʯ• Activity, Intent, ϦιʔεXMLΛී௨ʹ͑Δ• தؒίʔυ(MSIL)ͱMono VMΛΞϓϦ(apk) ʹಉࠝɺJava VMͱฏߦՔಇ
Xamarin.AndroidͷHello World[Activity(Label = "AppTitle",MainLauncher = true, Icon = "@mipmap/icon")]public class MainActivity : Activity{protected override void OnCreate(Bundle state){base.OnCreate(savedInstanceState);SetContentView(Resource.Layout.Main);var btn = FindViewById(Resource.Id.btn);btn.Click += (s, e) => btn.Text = "Hello World!";}}
Xamarin.Androidͷ࣮ߦϞσϧ"OESPJE04+BWB7..POP7.9BNBSJO"OESPJE.POPΞϓϦ $"OESPJE04+BWB7."OESPJE4%,ΞϓϦ +BWB+BWB4%,AndroidωΠςΟϒ Xamarin.Android
Xamarin.iOSͱʁ• iOS SDK(CocoaTouch)͕C#͔Βݺͼ(ry• ViewController, StoryboardΛී௨ʹ͑Δ• ࣄલ(AOT)ίϯύΠϥͰϚγϯޠΛੜ͠ΞϓϦ(ipa) ʹಉࠝ
Xamarin.iOSͷ࣮ߦϞσϧ"3."3.Ϛγϯޠ$PDPB5PVDI9BNBSJOJ04.POPΞϓϦέʔγϣϯ $.POP"05ίϯύΠϥ࣮ػXamarin.iOS"3."3.Ϛγϯޠ$PDPB5PVDIΞϓϦέʔγϣϯ 4XJGU--7.ίϯύΠϥ࣮ػiOSωΠςΟϒ
Xamarin.Formsͱʁ• Android, iOS, Win, ͦͷଞͰUIͷ࣮Λڞ௨Խ͢ΔϑϨʔϜϫʔΫ• ωΠςΟϒͷUI͕༻͞ΕΔ• .NETͷσεΫτοϓΞϓϦ։ൃख๏ʹ͍ۙ(XAML<βϜϧ>Ͱը໘Λهड़ͳͲ)• ϚΠΫϩιϑτ͜Εਪ͠
௨ৗͷAndroid։ൃͱXamarin.Androidͷҧ͍
౷߹։ൃڥ• Visual Studio 2017ʗfor Mac Λ͏• AndroidΞϓϦ։ൃʹಛԽͨ͠Android StudioΑΓएׯޮ͕མͪΔ(ओ؍)• UIσβΠφ• XMLϦιʔεͷΠϯϥΠϯදࣔɺ• JetBrains Riderͱ͍͏৽IDEʂ
ϏϧυγεςϜ• Gradle༻Ͱ͖ͳ͍• annotation processorΛ͏πʔϧϥΠϒϥϦ༻Ͱ͖ͳ͍• AndroidσʔλόΠϯσΟϯά• Orma, PermissionsDispatcherͱ͔• .NETͷϏϧυγεςϜʮMSBuildʯΛ͏
ύοέʔδཧγεςϜ• maven, JitPackͳͲ͑ͳ͍• nuget(ʹΎʔ͛ͬͱ)Λ͏• ׂͱ؆୯ʹ୭ͰϥΠϒϥϦΛొՄೳ
JavaͷϥΠϒϥϦ͑Δʁ• “BindingϥΠϒϥϦ”Λ࡞ΔࣄͰ༻Մೳ• “BindingϓϩδΣΫτ”ʹjarΛ์ΓࠐΉ͚ͩ• ෳࡶͳjarͩͱΧελϜϚοϐϯά͕ඞཁ• ஶ໊ͳJavaϥΠϒϥϦطʹଘࡏ͢Δ• Google Play services, Support Libs• Picasso, Glide, OkHttp, LeakCanary, Lottie
C#ͷར⏰ 40
ඇಉظॲཧ(async/await)• ͬͺ͜Ε• Task, TaskΫϥε• async/awaitߏจ• Rxͱ૬ޓมՄೳ
ඇಉظॲཧͷ࿈(Java)void sendZip(String src, String dest)// 1. σʔλΛμϯϩʔυͯ͠downloadAsync(src, data ->// 2. ZIPѹॖͯ͠zipAsync(data, zipped ->// 3. ผͳͱ͜Ζʹૹ৴sendAsync(zipped, dest, () ->activity.runOnUiThread(() ->// ૹ৴ྃ(UIεϨου)))));}ωετͭΒ͍ɾɾɾ
ඇಉظॲཧͷ࿈(C#)async void SendZip(string src, string dest){// 1. σʔλΛμϯϩʔυͯ͠var data = await DownloadAsync(src);// 2. ZIPѹॖͯ͠var zipped = await ZipAsync(data);// 3. ผͳͱ͜Ζʹૹ৴await SendAsync(zipped, dest);// ૹ৴ྃ(UIεϨου)}ϑϥοτʂ
ϥϜμࣜɺLINQ to Objectsvar list=new[]{0,1,2,3,4,5,6,7,8,9}// 0ʙ9Λ.Where(x => x % 2 == 0) // ۮͷΈ.OrderByDescending(x => x) // ߱ॱ.Select(x => x * 10); // 10ഒ// ݁Ռ: 80 60 40 20 0// ↑ͷ݁Ռͱ [40, 20, 10] ͱͷੵू߹Λऔಘ͢Δvar ret = list.Intersect(new[]{40,20,10});// ݁Ռ: 40 20֎෦ϥΠϒϥϦʹཔΒͣͰ͖Δͷ͕ڧ͍ʂ
ͪΐͬͱnull҆શʁ// hoge ͕ null ͳΒ࣮ߦ͠ͳ͍hoge?.DoSomething();// hoge, fuga ͕ null ͳΒ “none” Λฦ͢var text = hoge?.fuga?.ToString() ?? “none";int count = null; // ίϯύΠϧΤϥʔint? count = null; // null ೖՄೳࡶͳnullνΣοΫΛ؆ུԽͰ͖Δ
vs Kotlin• ηϛίϩϯϨεͳͲͷ؆ܿͳߏจ• ڧྗͳnull҆શ• ܕਪɺϥϜμࣜ• ύλʔϯϚον• ίϧʔνϯ(async/await)C#.NETϑϨʔϜϫʔΫͱڞʹਐԽͰ͖ΔڧΈݴޠͷϞμϯͩ͞ͱKotlinͷউͪ
X-PlatΞϓϦ։ൃͱίʔυͷڞ༗⏰ 30
.NETϑϨʔϜϫʔΫͰڞ௨Խ• .NETͷΫϥεϥΠϒϥϦΛͬͨίʔυAndroidɺiOSͰڞ༗Մೳ• ྫ:JavaͷArrayList → .NETͷListɺJavaͷCalendar → .NETͷDateTime/&5ϑϨʔϜϫʔΫʢ.POPʣ9BNBSJO"OESPJE 9BNBSJOJ04 9BNBSJO.BD
.NETϥΠϒϥϦΛ͓͏• ετϨʔδ - PCLStorage, Stream• σʔλϕʔε - SQLite-net, Realm Xamarin• ௨৴ - HttpClient• JSON - Json.NET• mBaaS - Azure, AWS, Firebase
MVVM+RxʹΑΔϞμϯͳΞϓϦ։ൃ
MVVMύλʔϯ• View: UIύʔπͷஔͱόΠϯσΟϯά• ViewModel: ViewͷͨΊͷσʔλͱॲཧ• Model: ্هҎ֎શͯ7JFX7JFX.PEFM.PEFMσʔλόΠϯσΟϯάMethodCallNotify
RxͱReactive Programing• Rx = Reactive Extensions• LINQͷඇಉظόʔδϣϯ• RxJava, RxSwiftͳͲҠ২͞Εͨ• RxJavaͷਐԽRxΑΓૣ͍• ํݴ͋ΕͲɺجຊಉ͡• Reactive ProgramingࠓඞਢεΩϧ
XamarinʹΑΔ“X-Plat”MVVM+RxΞϓϦ։ൃ⏰ 30
XamarinMVVMRxͱ૬ੑ͕Α͍ʂ• RxɺϚΠΫϩιϑτൃͷOSS͔Βීٴ• MVVMɺͷσεΫτοϓΞϓϦΞʔΩςΫνϟͷՌ(Windows.Forms → WPF)• .NETʹɺݟΛ࣋ͬͨਓؔ࿈ϑϨʔϜϫʔΫ͕๛ʹଘࡏ
MVVMϑϨʔϜϫʔΫ• Prism.Forms ࠷Hotͳਖ਼౷ϑϧελοΫϑϨʔϜϫʔΫ• MvvmCross ݹ͔͘ΒX-Plat MVVMΛࢧ͖͑ͯͨ NHKߚനΞϓϦͰ࠾༻• ReactiveUI MVVMʹRxΛ࣋ͪࠐΜͩ࠷ॳͷϑϨʔϜϫʔΫ
ReactiveProperty• ModelͷStreamΛViewʹ”ܨ͙”ϥΠϒϥϦ• ॳظ։ൃऀUniRxͷ࡞ऀ(a.k.a “Rxਆ”)• JavaʹҠ২ͨ͠ “RxProperty Android” ͋ΔΑ
MVVM+RxͰ࡞ͬͯΈ͓ͨ: GPSड৴ΞϓϦ(14ͷҢܦΛඵ͓͖ʹߋ৽։࢝ͱఀࢭʮʯ͔ʮඵʯʹΓସ͑
Android-JavaͰͷ࣮ύλʔϯ.BJO"DUJWJUZ .BJO7JFX.PEFMViewModelView Model-PDBUJPO6TFDBTFҢܦ5FYU7JFXදࣔܗࣜ4XJUDITUBSU 3Y+BWBMPDBUJPO0CTFSWBCMFMPDBUJPO։࢝#VUUPOPO$IFDLFEPO$MJDL"OESPJEσʔλόΠϯσΟϯά-PDBUJPO"QJ-PDBUJPO.BOBHFS'VTFE-PDBUJPO"QJ
iOS-SwiftͰͷ࣮ύλʔϯ.BJO7JFX$POUSPMMFS .BJO7JFX.PEFMViewModelView Model-PDBUJPO6TFDBTFҢܦ6*5FYU'JFMEදࣔܗࣜ6*4XJUDITUBSU 3Y4XJGUMPDBUJPO0CTFSWBCMFMPDBUJPO։࢝6*#VUUPOPO4XJUDITUBSU4XJGU#POE-PDBUJPO"QJ$--PDBUJPO.BOBHFS
Xamarin.FormsͰͷ࣮ύλʔϯ.BJO1BHF .BJO7JFX.PEFMViewModelView Model-PDBUJPO6TFDBTFҢܦ-BCFMදࣔܗࣜ4XJUDI4UBSU 3FBDUJWF&YUFOTJPOT-PDBUJPO0CTFSWBCMF-PDBUJPO։࢝#VUUPO*T%NT'PSNBU4UBSU9BNBSJO'PSNTσʔλόΠϯσΟϯά-PDBUJPO"QJ-PDBUJPO.BOBHFS-PDBUJPO"QJ$--PDBUJPO.BOBHFS
.BJO1BHF .BJO7JFX.PEFMViewModelView Model-PDBUJPO6TFDBTFҢܦ-BCFMදࣔܗࣜ4XJUDI4UBSU 3FBDUJWF&YUFOTJPOT-PDBUJPO0CTFSWBCMF-PDBUJPO։࢝#VUUPO*T%NT'PSNBU4UBSU9BNBSJO'PSNTσʔλόΠϯσΟϯά-PDBUJPO"QJ-PDBUJPO.BOBHFS-PDBUJPO"QJ$--PDBUJPO.BOBHFSAndroidσʔλόΠϯσΟϯάSwiftBond↓Xamarin.FormsσʔλόΠϯσΟϯάXamarin.FormsͰͷ࣮ύλʔϯ
.BJO1BHF .BJO7JFX.PEFMViewModelView Model-PDBUJPO6TFDBTFҢܦ-BCFMදࣔܗࣜ4XJUDI4UBSU 3FBDUJWF&YUFOTJPOT-PDBUJPO0CTFSWBCMF-PDBUJPO։࢝#VUUPO*T%NT'PSNBU4UBSU9BNBSJO'PSNTσʔλόΠϯσΟϯά-PDBUJPO"QJ-PDBUJPO.BOBHFS-PDBUJPO"QJ$--PDBUJPO.BOBHFSRxJavaRxSwift↓Reactive ExtensionsXamarin.FormsͰͷ࣮ύλʔϯ
.BJO1BHF .BJO7JFX.PEFMViewModelView Model-PDBUJPO6TFDBTFҢܦ-BCFMදࣔܗࣜ4XJUDI4UBSU 3FBDUJWF&YUFOTJPOT-PDBUJPO0CTFSWBCMF-PDBUJPO։࢝#VUUPO*T%NT'PSNBU4UBSU9BNBSJO'PSNTσʔλόΠϯσΟϯά-PDBUJPO"QJ-PDBUJPO.BOBHFS-PDBUJPO"QJ$--PDBUJPO.BOBHFSandoid:LocationaManagerios:CLLocationManager↓ϓϥοτϑΥʔϜݻ༗APIΛ࣮ͬͨΛDI(Dependency Injection)Xamarin.FormsͰͷ࣮ύλʔϯ
.BJO1BHF .BJO7JFX.PEFMViewModelView Model-PDBUJPO6TFDBTFҢܦ-BCFMදࣔܗࣜ4XJUDI4UBSU 3FBDUJWF&YUFOTJPOT-PDBUJPO0CTFSWBCMF-PDBUJPO։࢝#VUUPO*T%NT'PSNBU4UBSU9BNBSJO'PSNTσʔλόΠϯσΟϯά-PDBUJPO"QJ-PDBUJPO.BOBHFS-PDBUJPO"QJ$--PDBUJPO.BOBHFSڞ௨ԽͰ͖ͳ͍ͷ͚ͩ͜͜Xamarin.FormsͰͷ࣮ύλʔϯ
X-Platڞ௨ԽͰ͖ΔʁͰ͖ͳ͍ʁ• ViewModelɿશʹڞ௨ԽͰ͖Δ• Model• Usecaseɿશʹڞ௨ԽͰ͖Δ• APIɿҰ෦ڞ௨ԽͰ͖ΔɺͰ͖ͳ͚ΕDI• ViewɿҰ෦ڞ௨ԽͰ͖ΔɺͰ͖ͳ͚ΕDI⏰ 20
ڞ௨Խࣄྫ1:B2B͚ ंӡߦཧΞϓϦ• 20ը໘• ڞ௨Ͱͳ͍ॲཧ: GPS, Push௨, Ի࠶ੜ, Toast• ૯ίʔυߦ: 22,816Android:9%2,134ߦiOS:6%1,407ߦڞ௨:85% 19,275ߦ
ڞ௨Խࣄྫ2:ΤΠνɾΤεূ݊ εϚג• 70ը໘• ViewC#ɺViewModelͱModel F# Λ༻• ૯ίʔυߦ: 72,445Android:3%2,130ߦiOS:4%2,897ߦڞ௨:93%67,418ߦJXUG#17ʮূ݊औҾΞϓϦͱNote app࡞ͬͯΈͨʯΑΓ
Open Xamarin,ɹɹOpen Microsoft• Xamarin.Android .iOS .Forms શͯOSS• .NET Core• .NETϑϨʔϜϫʔΫ(ͷҰ෦)ΛOSS&X-PlatԽ• AWS LambdaGCP͕.NET/C#ʹରԠϚΠΫϩιϑτ = ϓϩϓϥΠΤλϦ.NET = Windows ඇৗࣝʂ
Xamarinͷ͍Ͳ͜Ζʙۜͷؙͳ͍ΑͶʙ
Xamarin͕͍͍ͯͳ͍έʔε• AndroidɺiOSͷτοϓΤϯδχΞ͕ډΔ ˠAndroidͷΤʔεʹXamarinෆཁ• ΞϓϦͷαΠζΛؾʹ͢ΔϓϩμΫτ ˠ.NETϥϯλΠϜΛಉࠝ͢ΔͷͰ༰ྔ૿͑Δ• फڭ্ͷཧ༝ →͏Μ͏ΜͦΕ͋ΔΑͶ
XamarinΛ͏͖έʔε• B2BͳϞόΠϧɾλϒϨοτΞϓϦ• Win, Android, iOSͰڞ௨ϩδοΫΛ࠷େԽ• ӡ༻อकίετ㽊ɺཁһ֬อ• ελʔτΞοϓاۀ• ϏδωεϞσϧݕূ༻ʹαΫοͱ։ൃ• AndroidͱiOSࢢʹಉ࣌ೖ• ϑΟʔυόοΫɾϧʔϓΛૉૣ͘ճͤΔ
·ͱΊ
Xamarin.AndroidͰ࢝ΊΔ ɹɹɹɹX-PlatϞόΠϧΞϓϦ։ൃ1. JavaͷAndroidΞϓϦΛɺXamarin.AndroidʹҠ২ͯ͠ΈΑ͏2. iOSΞϓϦΛXamarin.iOSͰ࡞ͬͯΈΑ͏3. ڞ௨ϩδοΫΛ.NETͰॻ͖ͯ͠ΈΑ͏4. Xamarin.FormsͰը໘ڞ௨ʹͯ͠ΈΑ͏5. MVVMRxΛద༻ͯ͠ΈΑ͏
Android iOS .NET ͥΜͿֶΜͰC# Ͱ D.R.Y ͢Δͷ͕Xamarin
ଓ͖ʮٕज़ॻయ̎ʯͰʂ• ͏-13ʮXamaritansʢ͟·ΓͨΜͣʣʯ• Xamarinͷ࠷ઌใΛ·ͱΊͨຊΛ͠·͢• ٕज़ॻయ(in χίχίձٞ2017)ʂ
͝ਗ਼ௌ͋Γ͕ͱ͏͍͟͝·ͨ͠$
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