App hibernation🥶

App hibernation🥶
https://developer.android.com/topic/performance/app-hibernation

DroidKaigi: ランチタイムLT会 Vol.1
https://droidkaigi.connpass.com/event/239328/

Transcript

1. App hibernation🥶
   DroidKaigi: ϥϯνλΠϜLTձ Vol.1
   

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2. ࣗݾ঺հ
   • Shinobu Okano
   
   
   • @operandoOS / shinobu.dart
   
   
   • 10X, Inc. / Software Engineer
   
   
   • Flutter / Dart / Android / Automation
   

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3. App hibernationͱ͸ʁ
   • Android 12͔Βೖͬͨ࢓૊Έ
   
   
   • ਺ϲ݄ར༻͞Ε͍ͯͳ͍ΞϓϦΛγεςϜ͕hibernation stateʹ
   

   ͠·͢Αʔͬͯ΍ͭ
   
   
   • Android 11Ͱಋೖ͞ΕͨAuto-reset permissionsΛਐԽͤͨ͞΍ͭ
   

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4. App hibernationͱ͸ʁ
   https://developer.android.com/topic/
   performance/app-hibernation
   

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5. Android11͔Βಋೖ͞ΕͨAuto-reset
   permissionsΛௐ΂ͯΈͯΘ͔ͬͨ͜ͱ
   https://hack-it-iron.hatenablog.com/entry/
   2020/12/14/081217
   

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6. hibernation͕ΞϓϦʹ༩͑ΔӨڹ
   

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7. Making permissions auto-reset available
   to billions more devices
   https://android-
   developers.googleblog.com/2021/09/
   making-permissions-auto-reset-
   available.html
   

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8. γεςϜ͕ΞϓϦΛ࢖༻͍ͯ͠ΔͱΈͳ͢Ξ
   Ϋγϣϯ͸ͳʹ͔ʁ
   

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9. γεςϜ͕ΞϓϦΛ࢖༻͍ͯ͠ΔͱΈͳ͢Ξ
   Ϋγϣϯ͸ͳʹ͔ʁ
   

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10. υΩϡϝϯτΛಡΜͰٙ໰ʹࢥͬͨ͜ͱ
    • ਺ϲ݄ར༻͞Ε͍ͯͳ͍ͬͯ۩ମతͳ਺ࣈ͸ʁ
    
    
    • Ͳͷ͘Β͍ͷස౓ͰhibernationͷνΣοΫ͕ߦΘΕΔͷ͔ʁ
    
    
    • App usageͬͯͲ͏΍ͬͯΧ΢ϯτͯ͠Δͷ͔ʁ
    
    
    • hibernation statusͳΞϓϦͷ࣮ߦ੍ޚΛͲ͏΍ͬͯ΍ͬͯΔͷ
    ͔ʁ
    

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11. ਺ϲ݄ར༻͞Ε͍ͯͳ͍ͬͯ۩ମతͳ਺ࣈ
    ͸ʁ
    • σϑΥϧτͰ͸90೔ؒ = ໿ࡾϲ݄
    
    
    • ݁ߏ௕͍Ͷʂ
    private val DEFAULT_UNUSED_THRESHOLD_MS = TimeUnit.DAYS.toMillis(90)
    
    
    

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12. ਺ϲ݄ར༻͞Ε͍ͯͳ͍ͬͯ۩ମతͳ਺ࣈ
    ͸ʁ
    • ظؒͷ͖͍͠஋Λมߋ͢Δ͜ͱ͸Ͱ͖Δ
    // ະ࢖༻ظؒͷ͖͍͠஋Λ1෼ʹมߋ
    
    
    adb shell device_config put permissions auto_revoke_unused_threshold_millis2 60000
    
    
    // ઃఆͰ͖͍ͯΔ͔Λ֬ೝ
    
    
    adb shell device_config get permissions auto_revoke_unused_threshold_millis2
    
    
    

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13. Ͳͷ͘Β͍ͷස౓ͰhibernationͷνΣοΫ
    ͕ߦΘΕΔͷ͔ʁ
    • σϑΥϧτͰ͸15೔ִؒ
    
    
    • ʢ͋Ε...ʁͦΜͳߴස౓͡Όͳ͍ͷͶ...😂ʣ
    private val DEFAULT_CHECK_FREQUENCY_MS = TimeUnit.DAYS.toMillis(15)
    
    
    

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14. Ͳͷ͘Β͍ͷස౓ͰhibernationͷνΣοΫ
    ͕ߦΘΕΔͷ͔ʁ
    • ͪ͜Β΋ස౓Λมߋ͢Δ͜ͱ͕Ͱ͖Δ
    // ࣮ߦपظΛ15෼ʹมߋ
    
    
    adb shell device_config put permissions auto_revoke_check_frequency_millis 900000
    
    
    // ઃఆͰ͖͍ͯΔ͔Λ֬ೝ
    
    
    adb shell device_config get permissions auto_revoke_check_frequency_millis
    
    
    

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15. App usageͬͯͲ͏΍ͬͯΧ΢ϯτͯ͠Δͷ
    ͔ʁ
    • UsageStatsManager͔ΒͷϦεφʔΛड͚औΕΔ࢓૊Έ͕͋
    ΓɺͦΕͰΧ΢ϯτ͍ͯ͠Δ
    
    
    • ͪͳΈʹΞϓϦ͕ར༻͞Ε͍ͯΔΠϕϯτ͕ඈΜͰ͖ͨΒɺ͙͢
    ʹhibernation͔Βͷ෮ؼ͕࣮ߦ͞ΕΔ
    

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16. App usageͬͯͲ͏΍ͬͯΧ΢ϯτͯ͠Δͷ
    ͔ʁ
    private final UsageEventListener mUsageEventListener = (userId, event) -> {
    
    
    if (!isAppHibernationEnabled()) {
    
    
    return;
    
    
    }
    
    
    final int eventType = event.mEventType;
    
    
    if (eventType == UsageEvents.Event.USER_INTERACTION
    
    
    || eventType == UsageEvents.Event.ACTIVITY_RESUMED
    
    
    || eventType == UsageEvents.Event.APP_COMPONENT_USED) {
    
    
    final String pkgName = event.mPackage;
    
    
    setHibernatingForUser(pkgName, userId, false);
    
    
    setHibernatingGlobally(pkgName, false);
    
    
    }
    
    
    };
    
    
    

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17. hibernation statusͳΞϓϦͷ࣮ߦ੍ޚΛͲ
    ͏΍ͬͯ΍ͬͯΔͷ͔ʁ
    • Θ͔Βͳ͔ͬͨ...🙏
    

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18. ͦͷଞ ಺෦ߏ଄Λௐ΂ͯΘ͔ͬͨ͜ͱ
    • Android 12Ͱ͸Ancroid 11ͰͷAuto-reset permissionsͷ࣮
    ૷͕HibernationPolicyͱ͔ʹมΘͬͯͦ͏
    
    
    • AppHibernationService͸؅ཧ͢Δ໾ׂΛ΍͍ͬͯΔɻ
    HibernationController͸PermissionͳͲͷແޮԽͳͲͷॲཧ
    Λ͍ͯ͠Δɻ؅ཧͱ࣮ߦͰ໾ׂ͕෼͔Ε͍ͯΔͬΆ͍ɻ
    

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19. ͦͷଞ ಺෦ߏ଄Λௐ΂ͯΘ͔ͬͨ͜ͱ
    • adb shell dumpsys app_hibernation͢Ε͹
    AppHibernationServiceΛdumpͰ͖Δ
    
    
    • hibernation͔Β෮ؼ͢ΔͱɺACTION_BOOT_COMPLETED
    ͱACTION_LOCKED_BOOT_COMPLETED͕broadcastͰൃՐ
    ͢Δ
    

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20. ͦͷଞ ಺෦ߏ଄Λௐ΂ͯΘ͔ͬͨ͜ͱ
    • hibernationͷ৘ใ͸ҎԼΈ͍ͨͳ৔ॴʹอଘ͍ͯ͠Δ
    
    
    • /data/system/hibernation/states
    
    
    • /data/system_ce/0/hibernation/states
    

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21. ࢀߟίʔυʢ͋Γ͗͢…😇ʣ
    • https://cs.android.com/android/platform/superproject/+/master:packages/modules/Permission/PermissionController/src/com/android/permissioncontroller/hibernation/
    
    
    • https://cs.android.com/android/platform/superproject/+/master:frameworks/base/core/java/android/apphibernation/AppHibernationManager.java
    
    
    • https://cs.android.com/android/platform/superproject/+/master:packages/modules/Permission/PermissionController/src/com/android/permissioncontroller/hibernation/HibernationController.kt
    
    
    • https://cs.android.com/android/platform/superproject/+/master:frameworks/base/services/core/java/com/android/server/apphibernation/
    
    
    • https://cs.android.com/android/platform/superproject/+/master:frameworks/base/services/core/java/com/android/server/apphibernation/AppHibernationService.java
    
    
    • https://cs.android.com/android/platform/superproject/+/master:frameworks/base/services/core/java/com/android/server/apphibernation/AppHibernationShellCommand.java
    
    
    • https://cs.android.com/android/platform/superproject/+/master:frameworks/base/services/core/java/com/android/server/apphibernation/GlobalLevelState.java
    
    
    • https://cs.android.com/android/platform/superproject/+/master:frameworks/base/services/core/java/com/android/server/apphibernation/UserLevelState.java
    
    
    • https://cs.android.com/android/platform/superproject/+/master:frameworks/base/services/core/java/com/android/server/apphibernation/HibernationStateDiskStore.java
    
    
    • https://cs.android.com/android/platform/superproject/+/master:packages/modules/Permission/PermissionController/src/com/android/permissioncontroller/hibernation/HibernationPolicy.kt
    
    
    • https://cs.android.com/android/platform/superproject/+/master:packages/modules/Permission/PermissionController/src/com/android/permissioncontroller/permission/service/
    AutoRevokePermissions.kt
    
    
    • https://cs.android.com/android/platform/superproject/+/master:packages/apps/Settings/src/com/android/settings/applications/HibernatedAppsPreferenceController.java
    
    
    • https://cs.android.com/android/platform/superproject/+/master:frameworks/base/core/java/android/apphibernation/AppHibernationManager.java
    

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22. App hibernationͷ಺෦ߏ଄Ͳ͏ௐ΂͔ͨ
    • DroidKaigi 2021 ʮͰ͖ΔʂAndroid Framework Code Readingʯ
    
    
    • https://speakerdeck.com/operando/dekiru-android-framework-
    code-reading
    
    
    • https://www.youtube.com/watch?
    v=44ChiZXry1E&list=PLaOdaBFokChxuuWf0eXWaf5H35R1Aroaz
    
    
    • ͪ͜ΒΛͥͻࢀߟʹ🙏
    

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23. Thanks🙏
    

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