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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 #jxug

amay077
April 07, 2017

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 #jxug

2017/04/08 - Xamarin 勉強会 in 名古屋 with JXUG, MSP, JXUG学生支部 https://jxug.connpass.com/event/52683/ の発表資料です。タイトル以外は DroidKaigi2017 の資料とまったく同じです。

amay077

April 07, 2017
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  1. Xamarin.AndroidͰ࢝ΊΔ

    ΫϩεϓϥοτϑΥʔϜ

    ϞόΠϧΞϓϦ։ൃ
    2017.4.8
    Xamarin ษڧձ in ໊ݹ԰ with JXUGֶੜࢧ෦, MSP
    @amay077

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  2. About me
    • Ԟࢁ ༟ਈ - @amay077ʢ͋Ί͍ʣ
    • ۀ຿ܥϓϩάϥϚ+α
    • Ѫ஌ݝࡏॅͷϑϧϦϞʔτϫʔΧʔ
    • ஍ཧ৘ใγεςϜɺҐஔ৘ใϓϩάϥϛϯά
    • Android, iOS, Xamarin, Java, C#, Salesforce

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  3. Work for

    • B2B޲͚PaaSɺ૔ݿ؅ཧɾӡૹۀ޲͚SaaS
    • AWS, Elasticsearch, Cassandra, Lambda, etc
    • શһ͕ϑϧϦϞʔτϫʔΧʔ
    ͓࢓ࣄ಺༰΍ϦϞʔτͰͷಇ͖ํͳͲڵຯ͋Δํɺؾܰʹฉ͍͍ͯͩ͘͞

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  4. Target
    • Androidॳʙதڃऀ
    • iOSΞϓϦ΋։ൃͯ͠Δʗͦ͠͏ͳਓ
    • Xamarinͬͯฉ͍ͨ͜ͱ͋Δ͚Ͳ࣮ࡍԿͳͷʁ
    ͱࢥͬͯΔਓ
    • .NETܥͷ։ൃ͸͋·Γͨ͠ࣄ͕ͳ͍ਓ

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  5. Agenda
    1. Xamarinͱ͸ʁ
    2. ௨ৗͷAndroid։ൃͱͷҧ͍
    3. C#ͷར఺
    4. X-PlatΞϓϦ։ൃͱίʔυͷڞ༗
    5. Xamarinͷ࢖͍Ͳ͜Ζ

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  6. Xamarinͱ͸ʁ
    ⏰ 45

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  7. Xamarinͱ͸ʁ

    /&5ϑϨʔϜϫʔΫʢ.POPʣ
    9BNBSJO"OESPJE 9BNBSJOJ04 9BNBSJO
    .BD
    9BNBSJO'PSNT
    Mono(.NETϑϨʔϜϫʔΫͷOSS࣮૷)Λ
    ج൫ͱͨ͠։ൃπʔϧΩοτ܈

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  8. Xamarin.Androidͱ͸ʁ
    • C#͔ΒAndroid API, Java API͕ݺͼग़ͤΔ
    ʮബ͍ϥούʔʯ
    • Activity, Intent, ϦιʔεXML౳Λී௨ʹ࢖͑Δ
    • தؒίʔυ(MSIL)ͱMono VMΛΞϓϦ(apk) ʹ
    ಉࠝɺJava VMͱฏߦՔಇ

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  9. 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!";
    }
    }

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  10. Xamarin.Androidͷ࣮ߦϞσϧ

    "OESPJE04
    +BWB7.
    .POP7.
    9BNBSJO"OESPJE.POP
    ΞϓϦ $

    "OESPJE04
    +BWB7.
    "OESPJE4%,
    ΞϓϦ +BWB

    +BWB4%,
    AndroidωΠςΟϒ Xamarin.Android

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  11. Xamarin.iOSͱ͸ʁ
    • iOS SDK(CocoaTouch)͕C#͔Βݺͼ(ry
    • ViewController, Storyboard౳Λී௨ʹ࢖͑Δ
    • ࣄલ(AOT)ίϯύΠϥͰϚγϯޠΛੜ੒͠Ξϓ
    Ϧ(ipa) ʹಉࠝ

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  12. Xamarin.iOSͷ࣮ߦϞσϧ

    "3.
    "3.Ϛγϯޠ
    $PDPB5PVDI
    9BNBSJOJ04.POP
    ΞϓϦέʔγϣϯ $

    .POP"05ίϯύΠϥ
    ࣮ػ
    Xamarin.iOS
    "3.
    "3.Ϛγϯޠ
    $PDPB5PVDI
    ΞϓϦέʔγϣϯ 4XJGU

    --7.ίϯύΠϥ
    ࣮ػ
    iOSωΠςΟϒ

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  13. Xamarin.Formsͱ͸ʁ
    • Android, iOS, Win, ͦͷଞͰUIͷ࣮૷Λڞ௨Խ
    ͢ΔϑϨʔϜϫʔΫ
    • ωΠςΟϒͷUI͕࢖༻͞ΕΔ
    • .NETͷσεΫτοϓΞϓϦ։ൃख๏ʹ͍ۙ
    (XAML<βϜϧ>Ͱը໘Λهड़ͳͲ)
    • ϚΠΫϩιϑτ͸͜Εਪ͠

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  14. ௨ৗͷAndroid։ൃͱ
    Xamarin.Androidͷҧ͍

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  15. ౷߹։ൃ؀ڥ
    • Visual Studio 2017ʗfor Mac Λ࢖͏
    • AndroidΞϓϦ։ൃʹಛԽͨ͠Android Studio
    ΑΓ͸एׯޮ཰͕མͪΔ(ओ؍)
    • UIσβΠφ
    • XMLϦιʔεͷΠϯϥΠϯදࣔɺ౳
    • JetBrains Riderͱ͍͏৽IDE΋ʂ

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  16. ϏϧυγεςϜ
    • Gradle͸࢖༻Ͱ͖ͳ͍
    • annotation processorΛ࢖͏πʔϧ΍ϥΠϒϥ
    Ϧ͸࢖༻Ͱ͖ͳ͍
    • AndroidσʔλόΠϯσΟϯά
    • Orma, PermissionsDispatcherͱ͔
    • .NETͷϏϧυγεςϜʮMSBuildʯΛ࢖͏

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  17. ύοέʔδ؅ཧγεςϜ
    • maven, JitPackͳͲ͸࢖͑ͳ͍
    • nuget(ʹΎʔ͛ͬͱ)Λ࢖͏
    • ׂͱ؆୯ʹ୭Ͱ΋ϥΠϒϥϦΛొ࿥Մೳ

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  18. JavaͷϥΠϒϥϦ͸࢖͑Δʁ
    • “BindingϥΠϒϥϦ”Λ࡞ΔࣄͰ࢖༻Մೳ
    • “BindingϓϩδΣΫτ”ʹjarΛ์ΓࠐΉ͚ͩ
    • ෳࡶͳjarͩͱΧελϜϚοϐϯά͕ඞཁ
    • ஶ໊ͳJavaϥΠϒϥϦ͸طʹଘࡏ͢Δ
    • Google Play services, Support Libs
    • Picasso, Glide, OkHttp, LeakCanary, Lottie

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  19. C#ͷར఺
    ⏰ 40

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  20. ඇಉظॲཧ(async/await)
    • ΍ͬͺ͜Ε
    • Task, TaskΫϥε
    • async/awaitߏจ
    • Rxͱ૬ޓม׵Մೳ

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  21. ඇಉظॲཧͷ࿈࠯(Java)

    void sendZip(String src, String dest)
    // 1. σʔλΛμ΢ϯϩʔυͯ͠
    downloadAsync(src, data ->
    // 2. ZIPѹॖͯ͠
    zipAsync(data, zipped ->
    // 3. ผͳͱ͜Ζʹૹ৴
    sendAsync(zipped, dest, () ->
    activity.runOnUiThread(() ->
    // ૹ৴׬ྃ(UIεϨου)
    ))));
    }
    ωετͭΒ͍ɾɾɾ

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  22. ඇಉظॲཧͷ࿈࠯(C#)

    async void SendZip(string src, string dest)
    {
    // 1. σʔλΛμ΢ϯϩʔυͯ͠
    var data = await DownloadAsync(src);
    // 2. ZIPѹॖͯ͠
    var zipped = await ZipAsync(data);
    // 3. ผͳͱ͜Ζʹૹ৴
    await SendAsync(zipped, dest);
    // ૹ৴׬ྃ(UIεϨου)
    }
    ϑϥοτʂ

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  23. ϥϜμࣜɺLINQ to Objects

    var list=new[]{0,1,2,3,4,5,6,7,8,9}// 0ʙ9Λ
    .Where(x => x % 2 == 0) // ۮ਺ͷΈ
    .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

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  24. ͪ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

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  25. vs Kotlin
    • ηϛίϩϯϨεͳͲͷ؆ܿͳߏจ
    • ڧྗͳnull҆શ
    • ܕਪ࿦ɺϥϜμࣜ
    • ύλʔϯϚον
    • ίϧʔνϯ(async/await)

    C#͸.NETϑϨʔϜϫʔΫͱڞʹਐԽͰ͖ΔڧΈ
    ݴޠͷϞμϯͩ͞ͱKotlinͷউͪ

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  26. X-PlatΞϓϦ։ൃͱ
    ίʔυͷڞ༗
    ⏰ 30

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  27. .NETϑϨʔϜϫʔΫͰڞ௨Խ
    • .NETͷΫϥεϥΠϒϥϦΛ࢖ͬͨίʔυ͸
    AndroidɺiOSͰڞ༗Մೳ
    • ྫ:JavaͷArrayList → .NETͷListɺ
    JavaͷCalendar → .NETͷDateTime

    /&5ϑϨʔϜϫʔΫʢ.POPʣ
    9BNBSJO"OESPJE 9BNBSJOJ04 9BNBSJO
    .BD

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  28. .NET੡ϥΠϒϥϦΛ࢖͓͏
    • ετϨʔδ - PCLStorage, Stream
    • σʔλϕʔε - SQLite-net, Realm Xamarin
    • ௨৴ - HttpClient
    • JSON - Json.NET
    • mBaaS - Azure, AWS, Firebase

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  29. MVVM+RxʹΑΔ
    ϞμϯͳΞϓϦ։ൃ

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  30. MVVMύλʔϯ
    • View: UIύʔπͷ഑ஔͱόΠϯσΟϯά
    • ViewModel: ViewͷͨΊͷσʔλͱॲཧ
    • Model: ্هҎ֎શͯ

    7JFX
    7JFX
    .PEFM
    .PEFM
    σʔλόΠϯσΟϯά
    Method
    Call
    Notify

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  31. RxͱReactive Programing
    • Rx = Reactive Extensions
    • LINQͷඇಉظόʔδϣϯ
    • RxJava, RxSwiftͳͲ΁Ҡ২͞Εͨ
    • RxJavaͷਐԽ͸RxΑΓૣ͍
    • ํݴ͸͋ΕͲɺجຊ͸ಉ͡
    • Reactive Programing͸ࠓ΍ඞਢεΩϧ

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  32. XamarinʹΑΔ
    “X-Plat”
    MVVM+RxΞϓϦ։ൃ
    ⏰ 30

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  33. Xamarin͸
    MVVM΍Rxͱ૬ੑ͕Α͍ʂ
    • Rx͸ɺϚΠΫϩιϑτൃͷOSS͔Βීٴ
    • MVVM͸ɺ௕೥ͷσεΫτοϓΞϓϦΞʔΩ
    ςΫνϟͷ੒Ռ(Windows.Forms → WPF)
    • .NETʹ͸ɺ஌ݟΛ࣋ͬͨਓ΍ؔ࿈ϑϨʔϜ
    ϫʔΫ͕๛෋ʹଘࡏ

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  34. MVVMϑϨʔϜϫʔΫ
    • Prism.Forms

    ࠷΋Hotͳਖ਼౷೿ϑϧελοΫϑϨʔϜϫʔΫ
    • MvvmCross

    ݹ͔͘ΒX-Plat MVVMΛࢧ͖͑ͯͨ

    NHKߚനΞϓϦͰ࠾༻
    • ReactiveUI

    MVVMʹRxΛ࣋ͪࠐΜͩ࠷ॳͷϑϨʔϜϫʔΫ

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  35. ReactiveProperty
    • ModelͷStreamΛViewʹ”ܨ͙”ϥΠϒϥϦ
    • ॳظ։ൃऀ͸UniRxͷ࡞ऀ(a.k.a “Rxਆ”)
    • JavaʹҠ২ͨ͠ “RxProperty Android” ΋͋ΔΑ

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  36. MVVM+RxͰ࡞ͬͯΈͨ
    ͓୊: GPSड৴ΞϓϦ

    (14ͷҢ౓ܦ౓Λ
    ඵ͓͖ʹߋ৽
    ։࢝ͱఀࢭ
    ʮ౓ʯ͔ʮ౓෼ඵʯʹ
    ੾Γସ͑

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  37. Android-JavaͰͷ࣮૷ύλʔϯ

    .BJO"DUJWJUZ .BJO7JFX.PEFM
    ViewModel
    View Model
    -PDBUJPO6TFDBTF
    Ң౓ܦ౓
    5FYU7JFX
    දࣔܗࣜ
    4XJUDI
    TUBSU

    3Y+BWB
    MPDBUJPO
    0CTFSWBCMF
    MPDBUJPO
    ։࢝
    #VUUPO
    PO$IFDLFE
    PO$MJDL
    "OESPJEσʔλόΠϯσΟϯά
    -PDBUJPO"QJ
    -PDBUJPO.BOBHFS
    'VTFE-PDBUJPO"QJ

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  38. iOS-SwiftͰͷ࣮૷ύλʔϯ

    .BJO7JFX$POUSPMMFS .BJO7JFX.PEFM
    ViewModel
    View Model
    -PDBUJPO6TFDBTF
    Ң౓ܦ౓
    6*5FYU'JFME
    දࣔܗࣜ
    6*4XJUDI
    TUBSU

    3Y4XJGU
    MPDBUJPO
    0CTFSWBCMF
    MPDBUJPO
    ։࢝
    6*#VUUPO
    PO4XJUDI
    TUBSU
    4XJGU#POE
    -PDBUJPO"QJ
    $--PDBUJPO.BOBHFS

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  39. Xamarin.FormsͰͷ࣮૷ύλʔϯ

    .BJO1BHF .BJO7JFX.PEFM
    ViewModel
    View Model
    -PDBUJPO6TFDBTF
    Ң౓ܦ౓
    -BCFM
    දࣔܗࣜ
    4XJUDI
    4UBSU

    3FBDUJWF&YUFOTJPOT
    -PDBUJPO
    0CTFSWBCMF
    -PDBUJPO
    ։࢝
    #VUUPO
    *T%NT'PSNBU
    4UBSU
    9BNBSJO'PSNTσʔλόΠϯσΟϯά
    -PDBUJPO"QJ
    -PDBUJPO.BOBHFS

    -PDBUJPO"QJ
    $--PDBUJPO.BOBHFS

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  40. .BJO1BHF .BJO7JFX.PEFM
    ViewModel
    View Model
    -PDBUJPO6TFDBTF
    Ң౓ܦ౓
    -BCFM
    දࣔܗࣜ
    4XJUDI
    4UBSU

    3FBDUJWF&YUFOTJPOT
    -PDBUJPO
    0CTFSWBCMF
    -PDBUJPO
    ։࢝
    #VUUPO
    *T%NT'PSNBU
    4UBSU
    9BNBSJO'PSNTσʔλόΠϯσΟϯά
    -PDBUJPO"QJ
    -PDBUJPO.BOBHFS

    -PDBUJPO"QJ
    $--PDBUJPO.BOBHFS
    AndroidσʔλόΠϯσΟϯά
    SwiftBond

    Xamarin.Forms
    σʔλόΠϯσΟϯά
    Xamarin.FormsͰͷ࣮૷ύλʔϯ

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  41. .BJO1BHF .BJO7JFX.PEFM
    ViewModel
    View Model
    -PDBUJPO6TFDBTF
    Ң౓ܦ౓
    -BCFM
    දࣔܗࣜ
    4XJUDI
    4UBSU

    3FBDUJWF&YUFOTJPOT
    -PDBUJPO
    0CTFSWBCMF
    -PDBUJPO
    ։࢝
    #VUUPO
    *T%NT'PSNBU
    4UBSU
    9BNBSJO'PSNTσʔλόΠϯσΟϯά
    -PDBUJPO"QJ
    -PDBUJPO.BOBHFS

    -PDBUJPO"QJ
    $--PDBUJPO.BOBHFS
    RxJava
    RxSwift

    Reactive Extensions
    Xamarin.FormsͰͷ࣮૷ύλʔϯ

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  42. .BJO1BHF .BJO7JFX.PEFM
    ViewModel
    View Model
    -PDBUJPO6TFDBTF
    Ң౓ܦ౓
    -BCFM
    දࣔܗࣜ
    4XJUDI
    4UBSU

    3FBDUJWF&YUFOTJPOT
    -PDBUJPO
    0CTFSWBCMF
    -PDBUJPO
    ։࢝
    #VUUPO
    *T%NT'PSNBU
    4UBSU
    9BNBSJO'PSNTσʔλόΠϯσΟϯά
    -PDBUJPO"QJ
    -PDBUJPO.BOBHFS

    -PDBUJPO"QJ
    $--PDBUJPO.BOBHFS
    andoid:LocationaManager
    ios:CLLocationManager

    ϓϥοτϑΥʔϜݻ༗APIΛ
    ࢖࣮ͬͨ૷ΛDI
    (Dependency Injection)
    Xamarin.FormsͰͷ࣮૷ύλʔϯ

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  43. .BJO1BHF .BJO7JFX.PEFM
    ViewModel
    View Model
    -PDBUJPO6TFDBTF
    Ң౓ܦ౓
    -BCFM
    දࣔܗࣜ
    4XJUDI
    4UBSU

    3FBDUJWF&YUFOTJPOT
    -PDBUJPO
    0CTFSWBCMF
    -PDBUJPO
    ։࢝
    #VUUPO
    *T%NT'PSNBU
    4UBSU
    9BNBSJO'PSNTσʔλόΠϯσΟϯά
    -PDBUJPO"QJ
    -PDBUJPO.BOBHFS

    -PDBUJPO"QJ
    $--PDBUJPO.BOBHFS
    ڞ௨ԽͰ͖ͳ͍ͷ͸͚ͩ͜͜
    Xamarin.FormsͰͷ࣮૷ύλʔϯ

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  44. X-Platڞ௨ԽͰ͖ΔʁͰ͖ͳ͍ʁ
    • ViewModel૚ɿ׬શʹڞ௨ԽͰ͖Δ
    • Model૚
    • Usecaseɿ׬શʹڞ௨ԽͰ͖Δ
    • APIɿҰ෦ڞ௨ԽͰ͖ΔɺͰ͖ͳ͚Ε͹DI
    • View૚ɿҰ෦ڞ௨ԽͰ͖ΔɺͰ͖ͳ͚Ε͹DI

    ⏰ 20

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  45. ڞ௨Խࣄྫ1:
    B2B޲͚ ं᫑ӡߦ؅ཧΞϓϦ

    • ໿20ը໘
    • ڞ௨Ͱͳ͍ॲཧ: GPS, Push௨஌, Ի੠࠶ੜ, Toast౳
    • ૯ίʔυߦ਺: 22,816
    Android:9%
    2,134ߦ
    iOS:6%
    1,407ߦ
    ڞ௨:85%

    19,275ߦ

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  46. ڞ௨Խࣄྫ2:
    ΤΠνɾΤεূ݊ εϚג

    • ໿70ը໘
    • View͸C#ɺViewModelͱModel͸ F# Λ࢖༻
    • ૯ίʔυߦ਺: 72,445
    Android:3%
    2,130ߦ
    iOS:4%
    2,897ߦ
    ڞ௨:93%
    67,418ߦ
    JXUG#17ʮূ݊औҾΞϓϦͱNote app࡞ͬͯΈͨʯΑΓ

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  47. Open Xamarin,
    ɹɹOpen Microsoft
    • Xamarin.Android .iOS .Forms ͸શͯOSS
    • .NET Core
    • .NETϑϨʔϜϫʔΫ(ͷҰ෦)ΛOSS&X-PlatԽ
    • AWS Lambda΍GCP͕.NET/C#ʹରԠ

    ϚΠΫϩιϑτ = ϓϩϓϥΠΤλϦ
    .NET = Windows ͸΋͸΍ඇৗࣝʂ

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  48. Xamarinͷ࢖͍Ͳ͜Ζ
    ʙۜͷ஄ؙ͸ͳ͍ΑͶʙ

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  49. Xamarin͕޲͍͍ͯͳ͍έʔε
    • AndroidɺiOSͷτοϓΤϯδχΞ͕ډΔ

    ˠAndroidͷΤʔεʹXamarin͸ෆཁ
    • ΞϓϦͷ഑෍αΠζΛؾʹ͢ΔϓϩμΫτ

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