Contributeしてない俺がDroidKaigiアプリについてゴニョゴニョ話す会

Contributeしてない俺がDroidKaigiアプリについてゴニョゴニョ話す会

文字起こし
https://github.com/operando/Notes/blob/master/Souzoh_Android_Talk_2/Contribute%E3%81%97%E3%81%A6%E3%81%AA%E3%81%84%E4%BF%BA%E3%81%8CDroidKaigi%E3%82%A2%E3%83%97%E3%83%AA%E3%81%AB%E3%81%A4%E3%81%84%E3%81%A6%E3%82%B4%E3%83%8B%E3%83%A7%E3%82%B4%E3%83%8B%E3%83%A7%E8%A9%B1%E3%81%99%E4%BC%9A.md

Souzoh Android Talk #2
https://mercari.connpass.com/event/78966/

Transcript

1. Contributeͯ͠ͳ͍Զ͕
   DroidKaigiΞϓϦʹ͍ͭͯ

   ΰχϣΰχϣ࿩͢ձ
   Souzoh Android Talk #2
   

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2. DroidKaigiΞϓϦ
   • https://github.com/konifar/droidkaigi2018-flutter
   • https://github.com/DroidKaigi/conference-app-2018
   • https://github.com/kikuchy/DroidKaigi2018iOS
   

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3. ࠓ೔࿩͢ͷ͸

   DroidKaigi/conference-app-2018
   

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4. ߹ΘͤͯಡΈ͍ͨʂ
   • DroidKaigi 2018 App Architecture by takahirom
   • https://speakerdeck.com/takahirom/
   droidkaigi-2018-app-architecture
   • DroidKaigi ΞϓϦͷ಺෦ΛݟΔ by tatsuhama50
   • https://www.slideshare.net/kenichitatsuhama/
   droidkaigi-88921455
   

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5. CircleCIͷΠϝʔδ͸ެࣜͷͰྑͦ͞͏
   • ͖ͬͱެࣜΠϝʔδΛFROMͰࢦఆͯ͠

   RubyΛೖΕͯΔͷ͔ͳʁ
   jobs:
   build:
   docker:
   - image: punchdrunker/android-27-ruby
   

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6. CircleCIͷΠϝʔδ͸ެࣜͷͰྑͦ͞͏
   • ࣮͸ެࣜͷΠϝʔδʹ΋Ruby͸ೖͬͯΔʂ
   • https://github.com/CircleCI-Public/circleci-
   dockerfiles/blob/master/android/images/
   api-27-alpha/Dockerfile#L125-L134
   

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7. CircleCIͷImage
   • CircleCI͕ఏڙͯ͠ΔImageͷDockerfile͸Githubʹ·ͱ·ͬͯΔ
   • https://github.com/CircleCI-Public/circleci-dockerfiles
   • AndroidͷDockerfile΋΋ͪΖΜ͋ΔΑ
   • https://github.com/CircleCI-Public/circleci-dockerfiles/tree/master/
   android/images
   • circleci/android:api-27-alphaͷDockerfileͳΒҎԼ
   • https://github.com/CircleCI-Public/circleci-dockerfiles/blob/master/
   android/images/api-27-alpha/Dockerfile
   

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8. ϖʔδΛอ࣋ͯ͘͠ΕʂཔΉʂ
   • SearchFragment͸ViewPagerͱTabLayoutͷߏ੒
   • SpeakerλϒʹҠಈͯ͠ɺSessionλϒΛ։͘ͱ
   Page͕࠶ߏஙʹͳΔ
   • εΫϩʔϧͯͨ͠ҐஔมΘͬͪΌ͏
   • Sessionλϒʹ੾Γସ͑Δ࣌ʹएׯ΋ͬ͞Γ͢Δ
   

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9. ϖʔδΛอ࣋ͯ͘͠ΕʂཔΉʂ
   • ͦ͜ͰViewPagerͷoffscreenPageLimitͰ͢ΑͶʂ
   • offscreenͷlimitΛมߋ͢Δ
   • σϑΥϧτͰ͸1
   • σϑΥϧτ 1ͳͷͰɺSpeakerλϒʹҠಈ͢Δͱ
   Sessionλϒ͕ফ͑Δ
   

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10. ϖʔδΛอ࣋ͯ͘͠ΕʂཔΉʂ
    • SpeakerλϒʹҠಈͯ͠΋Sessionλϒ͕

    ফ͑ͳ͍Α͏ʹ͍ͨ͠ʂ
    • offscreenPageLimitΛ2ʹ͢Ε͹Αͦ͞͏ʂ
    • binding.sessionsViewPager.offscreenPageLimit = 2
    

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11. Demo
    

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12. ϖʔδอ࣋Ͱ͖ͨʂ
    • ΍ͬͨͶʂ
    • ϖʔδ਺͕ͲΕ͘Β͍͔Θ͔ͬͯΔͳΒ

    ࠷దԽ͢Δ΄͏͕͍͍
    • ϖʔδͷอ࣋͢Δ෼ɺϝϞϦΛ࢖͏ͷͰ஫ҙ
    

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13. ViewPager#offscreenPageLimit
    • ViewPager#offscreenPageLimit API Document
    • https://developer.android.com/reference/
    android/support/v4/view/
    ViewPager.html#setOffscreenPageLimit(int)
    

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14. OkHttpͷLog͸ϦϦʔε൛͸

    ग़͞ͳ͍ํ͕͍͍ʂ
    

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15. OkHttpͷLog͸ϦϦʔε൛͸

    ग़͞ͳ͍ํ͕͍͍ʂ
    

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16. OkHttpͷLog͸ϦϦʔε൛͸

    ग़͞ͳ͍ํ͕͍͍ʂ
    

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17. OkHttpͷLog͸ϦϦʔε൛͸

    ग़͞ͳ͍ํ͕͍͍ʂ
    

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18. OkHttpͷLog͸ϦϦʔε൛͸

    ग़͞ͳ͍ํ͕͍͍ʂ
    

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19. ͭ·Γ
    

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20. OkHttpͷLog͸ϦϦʔε൛͸

    ग़͞ͳ͍ํ͕͍͍ʂ
    • ϦϦʔε൛ͷΞϓϦͰ͸HttpLoggingInterceptorΛ
    Interceptorʹઃఆ͠ͳ͍ํ͕͍͍
    • ·ͨ͸NONEʹઃఆ͢Δ
    • OkHttpͷݶΒͣɺLogcatʹྲྀ͢಺༰͸ϚδͰؾΛͭ
    ͚͍ͯͩ͘͞ʂ
    

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21. λϒ λοϓͨ࣌͠ʹ

    Listͷઌ಄ʹ໭Δͷ͍͍ΑͶʂ
    • ·ͨ·ͨSearchFragment͞ΜͰ͢
    • TabLayout.OnTabSelectedListenerΛ࢖ͬͯɺλοϓΠϕϯτΛ
    औͬͯΔ
    • λϒ͕λοϓ͞ΕΔͱɺViewPagerʹΞλον͞ΕͯΔ
    FragmentʹλονΠϕϯτ͕఻ΘΔ
    • FragmentͷRecyclerViewʹsmoothScrollToPosition(0)ͯ͠

    ઌ಄·ͰεΫϩʔϧͤ͞Δ
    

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22. Demo
    

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23. λϒ λοϓͨ࣌͠ʹ

    Listͷઌ಄ʹ໭Δͷ͍͍ΑͶʂ
    • ࣮૷؆୯͚ͩͲɺΊͬͪΌศརʹͳΔͷͰ

    ؾʹೖͬͨΒΈΜͳ࣮૷ͯ͠ΈͯͶʂ
    • ϝϧΧϦ Χ΢ϧͰ΋ࣅͨΑ͏ͳ࣮૷ͯ͠ΔΑʂ
    

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24. @CheckResult Annotation
    • APIͱ͔DBͱ͔Repositoryͷ໭Γ஋ͱ͔ʹ

    ͪΐ͍ͪΐ͍͚ͭΒΕͯͨ
    • DroidKaigiΞϓϦͰ࢖ΘΕͯΔͱ͜Ζ
    • https://github.com/DroidKaigi/conference-
    app-2018/search?
    q=CheckResult&type=Code&utf8=%E2%9C%93
    

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25. @CheckResult Annotation
    “ϝιουͷ݁Ռ·ͨ͸໭Γ஋͕࣮ࡍʹ࢖༻͞Ε͍ͯ
    Δ͔Ͳ͏͔Λݕূ͢Δʹ͸ @CheckResult Ξϊςʔ
    γϣϯΛ࢖༻͠·͢ɻ

    

    ͢΂ͯͷඇ void ϝιουʹ @CheckResult Ξϊςʔ
    γϣϯΛ෇͚ΔͷͰ͸ͳ͘ɺෳࡶͳϝιουͷ݁Ռ
    Λ໌֬ʹ͢ΔͨΊʹΞϊςʔγϣϯΛ௥Ճ͠·͢ɻ”
    

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26. @CheckResult Annotation
    “ͨͱ͑͹ɺܦݧͷઙ͍ Java σϕϩούʔ͸ɺ
    .trim() ͕ݩͷจࣈྻ͔ΒۭനΛ࡟আ͢
    Δ΋ͷͩͱצҧ͍͢Δ͜ͱ͕͋Γ·͢ɻϝιο
    υʹ @CheckResult ΞϊςʔγϣϯΛ෇͚Δ
    ͱɺݺͼग़͠ݩͰ .trim() ͷ໭Γ஋Λ
    Ұ੾࢖༻͍ͯ͠ͳ͍৔߹ʹܯࠂ͕ग़·͢ɻ”
    

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27. ࢖͍ํͱઆ໌͕

    ׬ᘳ͗ͯ͢਒͑ͨ͆
    

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28. @CheckResult Annotation
    • https://developer.android.com/studio/write/
    annotations.html#check-result
    • https://developer.android.com/reference/
    android/support/annotation/
    CheckResult.html
    

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29. ࠃࡍԽΛҙࣝͨ͠Notification Channel
    • Notification Channelͱ͸ʁ
    • ௨஌ΛChannelͱ͍͏୯ҐʹΧςΰϥΠζ͠Α͏ʂ
    • ৄ͘͠͸υΩϡϝϯτಡΜͰʂ
    • https://developer.android.com/guide/topics/ui/
    notifiers/notifications.html#ManageChannels
    

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30. ͳͥࠃࡍԽΛҙࣝ͠ͳ͍ͱ͍͚ͳ͍ͷ͔
    • NotificationChannelΛnew͢Δ࣌ͷname͸Ϣʔβʹ

    ݟ͑Δνϟϯωϧͷ֓ཁతͳ΍ͭ
    • ͜ΕઃఆΞϓϦͱ͔͕resource͔Βग़͢Θ͚Ͱ͸ͳ͍
    • ChannelΛੜ੒ͨ࣌͠ͷݴޠͷϦιʔεʹґଘ͢Δͬͯ͜ͱ
    • ೔ຊޠઃఆͰChannelΛ࡞੒ͯ͠ɺӳޠઃఆʹ͢Δͱ
    Channelͷઆ໌͕೔ຊޠʹͳΔͱ͍͏໰୊͕ى͖Δ
    

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31. ࠃࡍԽΛҙࣝͨ͠Notification Channel
    • ݴޠઃఆ͕มΘͬͨλΠϛϯάͰChannelΛ࡞Γ௚͢
    • android.intent.action.LOCALE_CHANGEDΛ

    BroadcastReceiverͰϑοΫ͢Δ
    • ͦͷλΠϛϯάͰνϟϯωϧΛ࡞Γ௚͢
    • NotificationManager.createNotificationChannel͸

    ಉ͡Channel IDʹରͯ͠࠶౓ੜ੒Λݺͼग़͢ͱname΍
    descriptionΛߋ৽Ͱ͖Δ
    

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32. ࠃࡍԽΛҙࣝͨ͠Notification Channel
    • ͜ͷ͜ͱͪΌΜͱυΩϡϝϯτʹ΋ॻ͍ͯ͋Δ
    • https://developer.android.com/reference/
    android/app/
    NotificationChannel.html#NotificationChannel
    (java.lang.String, java.lang.CharSequence, int)
    

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33. ࠃࡍԽΛҙࣝͨ͠Notification Channel
    “You can rename this channel when the
    system locale changes by listening for the
    ACTION_CHANGED broadcast.”
    

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34. ࠃࡍԽΛҙࣝͨ͠Notification Channel
    • Incomplete Implementation of Notification Channel
    • https://github.com/DroidKaigi/conference-
    app-2018/pull/406
    • ʲAndroid Oʳ௨஌νϟϯωϧΛࠃࡍԽ͢Δ
    • https://qiita.com/Shiozawa/items/
    095e77d38fc00681e898
    

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35. DrawerLayout
    • Α͘Ͱ͖ͯΔʂ
    • ͔͠΋Ͳͷը໘Ͱ΋Drawerग़ͤΔΑ͏ʹͳͬͯΔʂ
    • Google͕ਪ঑??ͯ͠Δಈ͘ͳͷͰΑ͍
    

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36. resValue
    • Gradle͔ΒResouce΋ੜ੒Ͱ͖Δʂ
    • ศརʂ
    

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37. resValue
    • app/build/generated/res/resValues/debug/
    values഑Լʹੜ੒͞ΕΔ
    
    
    
    
    1.0.0-debug
    
    DroidKaigi 2018 Dev
    
    

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38. BindingAdapter
    • TextBinding.ktʹͳΔ΄Ͳʔ͍ͬͯ͏ͷ͋ͬͨʂ
    • android:textͰDate౉ͤΔΑ͏ʹ͢Δ࣮૷ʂ
    @BindingAdapter(value = ["android:text"])
    fun TextView.setDateText(date: Date?) {
    date ?: return
    text = date.toReadableDateTimeString()
    }
    

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39. ͋ͱͳΜ͔ΞϓϦΫϥογϡͨ͆͠
    Shutting down VM
    FATAL EXCEPTION: main
    Process: io.github.droidkaigi.confsched2018, PID: 11577
    b.a
    at io.github.droidkaigi.confsched2018.presentation.feed.a.a$a.onPreDraw(FeedItem.kt:58)
    at android.view.ViewTreeObserver.dispatchOnPreDraw(ViewTreeObserver.java:977)
    at android.view.ViewRootImpl.performTraversals(ViewRootImpl.java:2349)
    at android.view.ViewRootImpl.doTraversal(ViewRootImpl.java:1392)
    at android.view.ViewRootImpl$TraversalRunnable.run(ViewRootImpl.java:6752)
    at android.view.Choreographer$CallbackRecord.run(Choreographer.java:911)
    at android.view.Choreographer.doCallbacks(Choreographer.java:723)
    at android.view.Choreographer.doFrame(Choreographer.java:658)
    at android.view.Choreographer$FrameDisplayEventReceiver.run(Choreographer.java:897)
    at android.os.Handler.handleCallback(Handler.java:790)
    at android.os.Handler.dispatchMessage(Handler.java:99)
    at android.os.Looper.loop(Looper.java:164)
    at android.app.ActivityThread.main(ActivityThread.java:6494)
    at java.lang.reflect.Method.invoke(Native Method)
    at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)
    

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40. ͞ΒʹಡΉͱ໘നͦ͏ͳͱ͜Ζ
    • Mapper͍͍ͬ͢Ͷ
    • Room
    • binding.prevSession = prevSessionͱ
    binding.nextSession = nextSession
    • RTLରԠ
    

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41. ͞ΒʹಡΉͱ໘നͦ͏ͳͱ͜Ζ
    • FirebaseFirestore
    • Firestore offline͸ແޮԽͯ͠Δ
    • in memory cache͸͋Δʁ
    • https://firebase.google.com/docs/firestore/manage-data/enable-
    offline?hl=ja
    • ͍͍ͶʂΦϑϥΠϯͷঢ়ଶͰ։͘ͱΞϓϦͷProcess kill͢Δ·Ͱऔಘ
    Ͱ͖ͳ͍ʁʁ
    • ΦϯϥΠϯʹͯ͠ProcessϨϕϧͰΞϓϦ্ཱͪ͛௚͢ͱऔಘͰ͖Δ
    

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42. ࿩͔͚ͨͬͨ͠Ͳ࣌ؒͷ౎߹্
    ࿩ͤͳ͔ͬͨ͜ͱ
    • EmojiCompat
    • Support LibraryͷDownloadable Fonts΍EmojiCompatʹରԠ

    ͨ͠ΞϓϦΛ࡞Ζ͏ by takahirom
    • https://speakerdeck.com/takahirom/support-
    libraryfalsedownloadable-fontsyaemojicompatnidui-ying-
    sitaapuriwozuo-rou
    • Resultύλʔϯ
    • FeedItemͳΜ͔bugͬͯΔ
    

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43. ࿩͔͚ͨͬͨ͠Ͳ࣌ؒͷ౎߹্
    ࿩ͤͳ͔ͬͨ͜ͱ
    • NotificationHelper.kt
    • NotificationChannelTypeΑ͞
    • Gradle Versions Plugin
    • ೖͬͯΔ͚ͲCIͱ͔Ͱ͸࢖ΘΕͯͳ͍ͷͰ๨Ε͕͚ͪͩͲΊͬͪΌศར
    • https://github.com/ben-manes/gradle-versions-plugin
    • AlarmManager.setAndAllowWhileIdle + Doze
    • https://qiita.com/FumihikoSHIROYAMA/items/
    b1d6dbda120462d0e209
    

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44. ࿩͔͚ͨͬͨ͠Ͳ࣌ؒͷ౎߹্
    ࿩ͤͳ͔ͬͨ͜ͱ
    • Open Source Notices
    • https://developers.google.com/android/guides/opensource
    • https://qiita.com/sho5nn/items/f63ebd7ccc0c86d98e4b
    • Kotlin DSL
    • https://github.com/gradle/kotlin-dsl
    • Kotlin + buildSrc for Better Gradle Dependency Management
    • https://handstandsam.com/2018/02/11/kotlin-buildsrc-for-better-gradle-
    dependency-management/
    • Ϛϧν Ϟδϡʔϧ͔ͩΒόʔδϣϯͷ؅ཧ͸͜͏ͨ͠ํָ͕
    

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45. ࿩͔͚ͨͬͨ͠Ͳ࣌ؒͷ౎߹্
    ࿩ͤͳ͔ͬͨ͜ͱ
    • MessageProcessorΛฦ͢ͷ͔
    • ͳΔ΄Ͳʔ
    • ॲཧΛMessageProcessor͝ͱʹॻ͚ΔͷͰྑͦ͞͏
    • ࣅͨΑ͏ͳ͜ͱΛϝϧΧϦ Χ΢ϧͰ΋Custom URLͰ
    ΍ͬͯΔ
    

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46. ͞Βʹ͜ͷ࣮૷΋͋Ε͹ྑ͔ͬͨʔ
    • Runtime Permission
    • ͍Βͳ͍ͳΒແཧʹ΍Δඞཁͳ͍ΑͶ
    

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47. DroidKaigi 2018 Flutter App
    • https://github.com/konifar/droidkaigi2018-flutter
    • git clone͔ͯ͠ΒAndroidϏϧυͰ͖Ͷʔw
    

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48. Thanks
    

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