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Xamarin.Android で始めるクロスプラットフォームモバイルアプリ開発 #droidkaigi #droidkaigi1
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amay077
March 09, 2017
Programming
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Xamarin.Android で始めるクロスプラットフォームモバイルアプリ開発 #droidkaigi #droidkaigi1
DroidKaigi2017 -
https://droidkaigi.github.io/2017/
day2 AM10:40-11:30 Room1 の発表資料です。
amay077
March 09, 2017
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Transcript
Xamarin.AndroidͰ࢝ΊΔ ΫϩεϓϥοτϑΥʔϜ ϞόΠϧΞϓϦ։ൃ 2017.3.10 DroidKaigi2017 @amay077
About me • Ԟࢁ ༟ਈ - @amay077ʢ͋Ί͍ʣ • ۀܥϓϩάϥϚ+α •
ѪݝࡏॅͷϑϧϦϞʔτϫʔΧʔ • ཧใγεςϜɺҐஔใϓϩάϥϛϯά • Android, iOS, Xamarin, Java, C#, Salesforce
Work for • B2B͚PaaSɺݿཧɾӡૹۀ͚SaaS • AWS, Elasticsearch, Cassandra, Lambda,
etc • શһ͕ϑϧϦϞʔτϫʔΧʔ ͓ࣄ༰ϦϞʔτͰͷಇ͖ํͳͲڵຯ͋Δํɺؾܰʹฉ͍͍ͯͩ͘͞
Target • Androidॳʙதڃऀ • iOSΞϓϦ։ൃͯ͠Δʗͦ͠͏ͳਓ • Xamarinͬͯฉ͍ͨ͜ͱ͋Δ͚Ͳ࣮ࡍԿͳͷʁ ͱࢥͬͯΔਓ • .NETܥͷ։ൃ͋·Γͨ͠ࣄ͕ͳ͍ਓ
Agenda 1. Xamarinͱʁ 2. ௨ৗͷAndroid։ൃͱͷҧ͍ 3. C#ͷར 4. X-PlatΞϓϦ։ൃͱίʔυͷڞ༗ 5.
Xamarinͷ͍Ͳ͜Ζ
Xamarinͱʁ ⏰ 45
Xamarinͱʁ /&5ϑϨʔϜϫʔΫʢ.POPʣ 9BNBSJO"OESPJE 9BNBSJOJ04 9BNBSJO .BD 9BNBSJO'PSNT Mono(.NETϑϨʔϜϫʔΫͷOSS࣮)Λ ج൫ͱͨ͠։ൃπʔϧΩοτ܈
Xamarin.Androidͱʁ • C#͔ΒAndroid API, Java API͕ݺͼग़ͤΔ ʮബ͍ϥούʔʯ • Activity, Intent,
ϦιʔεXMLΛී௨ʹ͑Δ • தؒίʔυ(MSIL)ͱMono VMΛΞϓϦ(apk) ʹ ಉࠝɺJava 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<Button>(Resource.Id.btn); btn.Click += (s, e) => btn.Text = "Hello World!"; } }
Xamarin.Androidͷ࣮ߦϞσϧ "OESPJE04 +BWB7. .POP7. 9BNBSJO"OESPJE.POP ΞϓϦ $ "OESPJE04
+BWB7. "OESPJE4%, ΞϓϦ +BWB +BWB4%, AndroidωΠςΟϒ Xamarin.Android
Xamarin.iOSͱʁ • iOS SDK(CocoaTouch)͕C#͔Βݺͼ(ry • ViewController, StoryboardΛී௨ʹ͑Δ • ࣄલ(AOT)ίϯύΠϥͰϚγϯޠΛੜ͠Ξϓ Ϧ(ipa)
ʹಉࠝ
Xamarin.iOSͷ࣮ߦϞσϧ "3. "3.Ϛγϯޠ $PDPB5PVDI 9BNBSJOJ04.POP ΞϓϦέʔγϣϯ $ .POP"05ίϯύΠϥ
࣮ػ Xamarin.iOS "3. "3.Ϛγϯޠ $PDPB5PVDI ΞϓϦέʔγϣϯ 4XJGU --7.ίϯύΠϥ ࣮ػ iOSωΠςΟϒ
Xamarin.Formsͱʁ • Android, iOS, Win, ͦͷଞͰUIͷ࣮Λڞ௨Խ ͢ΔϑϨʔϜϫʔΫ • ωΠςΟϒͷUI͕༻͞ΕΔ •
.NETͷσεΫτοϓΞϓϦ։ൃख๏ʹ͍ۙ (XAML<βϜϧ>Ͱը໘Λهड़ͳͲ) • ϚΠΫϩιϑτ͜Εਪ͠
௨ৗͷAndroid։ൃͱ Xamarin.Androidͷҧ͍
౷߹։ൃڥ • Visual Studio 2017ʗfor Mac Λ͏ • AndroidΞϓϦ։ൃʹಛԽͨ͠Android Studio
ΑΓएׯޮ͕མͪΔ(ओ؍) • UIσβΠφ • XMLϦιʔεͷΠϯϥΠϯදࣔɺ • JetBrains Riderͱ͍͏৽IDEʂ
ϏϧυγεςϜ • Gradle༻Ͱ͖ͳ͍ • annotation processorΛ͏πʔϧϥΠϒϥ Ϧ༻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, Task<T>Ϋϥε • async/awaitߏจ • Rxͱ૬ޓมՄೳ
ඇಉظॲཧͷ࿈(Java) void sendZip(String src, String dest) // 1. σʔλΛμϯϩʔυͯ͠
downloadAsync(src, data -> // 2. ZIPѹॖͯ͠ zipAsync(data, zipped -> // 3. ผͳͱ͜Ζʹૹ৴ sendAsync(zipped, dest, () -> activity.runOnUiThread(() -> // ૹ৴ྃ(UIεϨου) )))); } ωετͭΒ͍ɾɾɾ
ඇಉظॲཧͷ࿈(C#) async void SendZip(string src, string dest) { //
1. σʔλΛμϯϩʔυͯ͠ var data = await DownloadAsync(src); // 2. ZIPѹॖͯ͠ var zipped = await ZipAsync(data); // 3. ผͳͱ͜Ζʹૹ৴ await SendAsync(zipped, dest); // ૹ৴ྃ(UIεϨου) } ϑϥοτʂ
ϥϜμࣜɺLINQ to Objects var 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߹Λऔಘ͢Δ var ret = list.Intersect(new[]{40,20,10}); // ݁Ռ: 40 20 ֎෦ϥΠϒϥϦʹཔΒͣͰ͖Δͷ͕ڧ͍ʂ
ͪΐͬͱnull҆શʁ // hoge ͕ null ͳΒ࣮ߦ͠ͳ͍ hoge?.DoSomething(); // hoge,
fuga ͕ null ͳΒ “none” Λฦ͢ var text = hoge?.fuga?.ToString() ?? “none"; int count = null; // ίϯύΠϧΤϥʔ int? count = null; // null ೖՄೳ ࡶͳnullνΣοΫΛ؆ུԽͰ͖Δ
vs Kotlin • ηϛίϩϯϨεͳͲͷ؆ܿͳߏจ • ڧྗͳnull҆શ • ܕਪɺϥϜμࣜ • ύλʔϯϚον
• ίϧʔνϯ(async/await) C#.NETϑϨʔϜϫʔΫͱڞʹਐԽͰ͖ΔڧΈ ݴޠͷϞμϯͩ͞ͱKotlinͷউͪ
X-PlatΞϓϦ։ൃͱ ίʔυͷڞ༗ ⏰ 30
.NETϑϨʔϜϫʔΫͰڞ௨Խ • .NETͷΫϥεϥΠϒϥϦΛͬͨίʔυ AndroidɺiOSͰڞ༗Մೳ • ྫ:JavaͷArrayList<T> → .NETͷList<T>ɺ JavaͷCalendar →
.NETͷDateTime /&5ϑϨʔϜϫʔΫʢ.POPʣ 9BNBSJO"OESPJE 9BNBSJOJ04 9BNBSJO .BD
.NETϥΠϒϥϦΛ͓͏ • ετϨʔδ - PCLStorage, Stream • σʔλϕʔε - SQLite-net,
Realm Xamarin • ௨৴ - HttpClient • JSON - Json.NET • mBaaS - Azure, AWS, Firebase
MVVM+RxʹΑΔ ϞμϯͳΞϓϦ։ൃ
MVVMύλʔϯ • View: UIύʔπͷஔͱόΠϯσΟϯά • ViewModel: ViewͷͨΊͷσʔλͱॲཧ • Model: ্هҎ֎શͯ
7JFX 7JFX .PEFM .PEFM σʔλόΠϯσΟϯά Method Call Notify
RxͱReactive Programing • Rx = Reactive Extensions • LINQͷඇಉظόʔδϣϯ •
RxJava, RxSwiftͳͲҠ২͞Εͨ • RxJavaͷਐԽRxΑΓૣ͍ • ํݴ͋ΕͲɺجຊಉ͡ • Reactive ProgramingࠓඞਢεΩϧ
XamarinʹΑΔ “X-Plat” MVVM+RxΞϓϦ։ൃ ⏰ 30
Xamarin MVVMRxͱ૬ੑ͕Α͍ʂ • RxɺϚΠΫϩιϑτൃͷOSS͔Βීٴ • MVVMɺͷσεΫτοϓΞϓϦΞʔΩ ςΫνϟͷՌ(Windows.Forms → WPF) •
.NETʹɺݟΛ࣋ͬͨਓؔ࿈ϑϨʔϜ ϫʔΫ͕๛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࡞ͬͯΈͨ ͓: GPSड৴ΞϓϦ (14ͷҢܦΛ ඵ͓͖ʹߋ৽ ։࢝ͱఀࢭ ʮʯ͔ʮඵʯʹ Γସ͑
Android-JavaͰͷ࣮ύλʔϯ .BJO"DUJWJUZ .BJO7JFX.PEFM ViewModel View Model -PDBUJPO6TFDBTF Ңܦ 5FYU7JFX
දࣔܗࣜ 4XJUDI TUBSU 3Y+BWB MPDBUJPO 0CTFSWBCMF MPDBUJPO ։࢝ #VUUPO PO$IFDLFE PO$MJDL "OESPJEσʔλόΠϯσΟϯά -PDBUJPO"QJ -PDBUJPO.BOBHFS 'VTFE-PDBUJPO"QJ
iOS-SwiftͰͷ࣮ύλʔϯ .BJO7JFX$POUSPMMFS .BJO7JFX.PEFM ViewModel View Model -PDBUJPO6TFDBTF Ңܦ 6*5FYU'JFME
දࣔܗࣜ 6*4XJUDI TUBSU 3Y4XJGU MPDBUJPO 0CTFSWBCMF MPDBUJPO ։࢝ 6*#VUUPO PO4XJUDI TUBSU 4XJGU#POE -PDBUJPO"QJ $--PDBUJPO.BOBHFS
Xamarin.FormsͰͷ࣮ύλʔϯ .BJO1BHF .BJO7JFX.PEFM ViewModel View Model -PDBUJPO6TFDBTF Ңܦ -BCFM
දࣔܗࣜ 4XJUDI 4UBSU 3FBDUJWF&YUFOTJPOT -PDBUJPO 0CTFSWBCMF -PDBUJPO ։࢝ #VUUPO *T%NT'PSNBU 4UBSU 9BNBSJO'PSNTσʔλόΠϯσΟϯά -PDBUJPO"QJ -PDBUJPO.BOBHFS <Inject> -PDBUJPO"QJ $--PDBUJPO.BOBHFS
.BJO1BHF .BJO7JFX.PEFM ViewModel View Model -PDBUJPO6TFDBTF Ңܦ -BCFM දࣔܗࣜ
4XJUDI 4UBSU 3FBDUJWF&YUFOTJPOT -PDBUJPO 0CTFSWBCMF -PDBUJPO ։࢝ #VUUPO *T%NT'PSNBU 4UBSU 9BNBSJO'PSNTσʔλόΠϯσΟϯά -PDBUJPO"QJ -PDBUJPO.BOBHFS <Inject> -PDBUJPO"QJ $--PDBUJPO.BOBHFS AndroidσʔλόΠϯσΟϯά SwiftBond ↓ Xamarin.Forms σʔλόΠϯσΟϯά Xamarin.FormsͰͷ࣮ύλʔϯ
.BJO1BHF .BJO7JFX.PEFM ViewModel View Model -PDBUJPO6TFDBTF Ңܦ -BCFM දࣔܗࣜ
4XJUDI 4UBSU 3FBDUJWF&YUFOTJPOT -PDBUJPO 0CTFSWBCMF -PDBUJPO ։࢝ #VUUPO *T%NT'PSNBU 4UBSU 9BNBSJO'PSNTσʔλόΠϯσΟϯά -PDBUJPO"QJ -PDBUJPO.BOBHFS <Inject> -PDBUJPO"QJ $--PDBUJPO.BOBHFS RxJava RxSwift ↓ Reactive Extensions Xamarin.FormsͰͷ࣮ύλʔϯ
.BJO1BHF .BJO7JFX.PEFM ViewModel View Model -PDBUJPO6TFDBTF Ңܦ -BCFM දࣔܗࣜ
4XJUDI 4UBSU 3FBDUJWF&YUFOTJPOT -PDBUJPO 0CTFSWBCMF -PDBUJPO ։࢝ #VUUPO *T%NT'PSNBU 4UBSU 9BNBSJO'PSNTσʔλόΠϯσΟϯά -PDBUJPO"QJ -PDBUJPO.BOBHFS <Inject> -PDBUJPO"QJ $--PDBUJPO.BOBHFS andoid:LocationaManager ios:CLLocationManager ↓ ϓϥοτϑΥʔϜݻ༗APIΛ ࣮ͬͨΛDI (Dependency Injection) Xamarin.FormsͰͷ࣮ύλʔϯ
.BJO1BHF .BJO7JFX.PEFM ViewModel View Model -PDBUJPO6TFDBTF Ңܦ -BCFM දࣔܗࣜ
4XJUDI 4UBSU 3FBDUJWF&YUFOTJPOT -PDBUJPO 0CTFSWBCMF -PDBUJPO ։࢝ #VUUPO *T%NT'PSNBU 4UBSU 9BNBSJO'PSNTσʔλόΠϯσΟϯά -PDBUJPO"QJ -PDBUJPO.BOBHFS <Inject> -PDBUJPO"QJ $--PDBUJPO.BOBHFS ڞ௨ԽͰ͖ͳ͍ͷ͚ͩ͜͜ Xamarin.FormsͰͷ࣮ύλʔϯ
X-Platڞ௨ԽͰ͖ΔʁͰ͖ͳ͍ʁ • ViewModelɿશʹڞ௨ԽͰ͖Δ • Model • Usecaseɿશʹڞ௨ԽͰ͖Δ • APIɿҰ෦ڞ௨ԽͰ͖ΔɺͰ͖ͳ͚ΕDI •
ViewɿҰ෦ڞ௨ԽͰ͖ΔɺͰ͖ͳ͚ΕDI ⏰ 20
ڞ௨Խࣄྫ1: B2B͚ ंӡߦཧΞϓϦ • 20ը໘ • ڞ௨Ͱͳ͍ॲཧ: GPS, Push௨,
Ի࠶ੜ, Toast • ૯ίʔυߦ: 22,816 Android:9% 2,134ߦ iOS:6% 1,407ߦ ڞ௨:85% 19,275ߦ
ڞ௨Խࣄྫ2: ΤΠνɾΤεূ݊ εϚג • 70ը໘ • ViewC#ɺViewModelͱModel F# Λ༻
• ૯ίʔυߦ: 72,445 Android:3% 2,130ߦ iOS:4% 2,897ߦ ڞ௨:93% 67,418ߦ JXUG#17ʮূ݊औҾΞϓϦͱNote app࡞ͬͯΈͨʯΑΓ
Open Xamarin, ɹɹOpen Microsoft • Xamarin.Android .iOS .Forms શͯOSS •
.NET Core • .NETϑϨʔϜϫʔΫ(ͷҰ෦)ΛOSS&X-PlatԽ • AWS LambdaGCP͕.NET/C#ʹରԠ ϚΠΫϩιϑτ = ϓϩϓϥΠΤλϦ .NET = Windows ඇৗࣝʂ
Xamarinͷ͍Ͳ͜Ζ ʙۜͷؙͳ͍ΑͶʙ
Xamarin͕͍͍ͯͳ͍έʔε • AndroidɺiOSͷτοϓΤϯδχΞ͕ډΔ ˠAndroidͷΤʔεʹXamarinෆཁ • ΞϓϦͷαΠζΛؾʹ͢ΔϓϩμΫτ ˠ.NETϥϯλΠϜΛಉࠝ͢ΔͷͰ༰ྔ૿͑Δ • फڭ্ͷཧ༝ →͏Μ͏ΜͦΕ͋ΔΑͶ
XamarinΛ͏͖έʔε • B2BͳϞόΠϧɾλϒϨοτΞϓϦ • Win, Android, iOSͰڞ௨ϩδοΫΛ࠷େԽ • ӡ༻อकίετ㽊ɺཁһ֬อ •
ελʔτΞοϓاۀ • ϏδωεϞσϧݕূ༻ʹαΫοͱ։ൃ • AndroidͱiOSࢢʹಉ࣌ೖ • ϑΟʔυόοΫɾϧʔϓΛૉૣ͘ճͤΔ
·ͱΊ
Xamarin.AndroidͰ࢝ΊΔ ɹɹɹɹX-PlatϞόΠϧΞϓϦ։ൃ 1. JavaͷAndroidΞϓϦΛɺXamarin.Android ʹҠ২ͯ͠ΈΑ͏ 2. iOSΞϓϦΛXamarin.iOSͰ࡞ͬͯΈΑ͏ 3. ڞ௨ϩδοΫΛ.NETͰॻ͖ͯ͠ΈΑ͏ 4.
Xamarin.FormsͰը໘ڞ௨ʹͯ͠ΈΑ͏ 5. MVVMRxΛద༻ͯ͠ΈΑ͏
Android iOS .NET ͥΜͿֶΜͰ C# Ͱ D.R.Y ͢Δͷ͕
Xamarin
ଓ͖ʮٕज़ॻయ̎ʯͰʂ • ͏-13ʮXamaritansʢ͟·ΓͨΜͣʣʯ • Xamarinͷ࠷ઌใΛ·ͱΊͨຊΛ͠·͢ • ٕज़ॻయ(in χίχίձٞ2017)ʂ
͝ਗ਼ௌ ͋Γ͕ͱ͏͍͟͝·ͨ͠$