Android Oのバックグラウンド制限

Android O のバックグラウンド制限について説明します。

参照：
- Background Check and Other Insights into the Android Operating System Framework (Google I/O '17)
https://www.youtube.com/watch?v=hbLAzwhBjFE
- バックグランド実行制限
https://developer.android.com/preview/features/background.html?hl=ja
- 暗黙的なブロードキャストの例外
https://developer.android.com/preview/features/background-broadcasts.html?hl=ja

Transcript

1. Android O ͷ

   όοΫάϥ΢ϯυ੍ݶ
   

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2. 2
   I/Oηογϣϯ
   #BDLHSPVOE$IFDLBOE0UIFS*OTJHIUTJOUPUIF"OESPJE
   0QFSBUJOH4ZTUFN'SBNFXPSL (PPHMF*0
   
   https://www.youtube.com/watch?v=hbLAzwhBjFE
   

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3. 3
   ੍ݶ
   w όοΫάϥ΢ϯυαʔϏεͷ੍ݶ
   w ϒϩʔυΩϟετͷ੍ݶ
   w όοΫάϥ΢ϯυ-PDBUJPO8J'J
   w "MFSU8JOEPXT
   4:45&.@"-&35@8*/%08
   
   

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4. 4
   όοΫάϥ΢ϯυ੍ݶͱ͸
   "OESPJE0Ͱ͸ɺϢʔβʔΤΫεϖϦΤϯεΛ޲্ͤ͞ΔͨΊʹɺΞϓϦ͕
   όοΫάϥ΢ϯυͰ࣮ߦ͞Ε͍ͯΔͱ͖ͷಈ࡞Λ੍ݶ͍ͯ͠·͢ɻ
   https://developer.android.com/preview/features/background.html?hl=ja
   

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5. 5
   ͳͥʁ
   w 3".Ϛωʔδϝϯτ
   w লిྗ
   

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6. όοΫάϥ΢ϯυαʔϏε
   ͷ੍ݶ
   6
   

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7. 7
   όοΫάϥ΢ϯυαʔϏεͷ੍ݶ
   wՄࢹΞΫςΟϏςΟ͕͋Δ
   wՄࢹΞΫςΟϏςΟ͕ͳ͍
   ˠϑΥΞόοΫ྆ํͷαʔϏεΛ࡞ΕΔ
   ˠϑΥΞάϥ΢ϯυ
   ˠόοΫάϥ΢ϯυ
   ˠόοΫάϥ΢ϯυαʔϏε͸਺෼Ͱఀࢭ͢Δ
   UBSHFU4EL7FSTJPO͕0ͷͱ͖ͷΈʂ
   

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8. 8
   ࣮ߦྫʢόοΫάϥ΢ϯυαʔϏεʣ
   public class MainActivity extends AppCompatActivity {
   @Override
   protected void onCreate(Bundle savedInstanceState) {
   service = new Intent(this, MyService.class);
   startService(service);
   public class MyService extends Service {
   private Timer timer;
   private final TimerTask task = …
   @Override
   public int onStartCommand(Intent intent, int flags,
   int startId) {
   timer = new Timer();
   timer.scheduleAtFixedRate(task, 0,
   TimeUnit.SECONDS.toMillis(10));
   

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9. 9
   ࣮ߦྫʢόοΫάϥ΢ϯυαʔϏεʣ
   

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10. 10
    ࣮ߦྫʢϑΥΞάϥ΢ϯυαʔϏεʣ
    public class MyService extends Service {
    private Timer timer;
    private final TimerTask task = …
    @Override
    public int onStartCommand(Intent intent, int flags,
    int startId) {
    timer = new Timer();
    timer.scheduleAtFixedRate(task, 0,
    TimeUnit.SECONDS.toMillis(10));
    PendingIntent pendingIntent = …
    Notification notification = …
    startForeground(startId, notification);
    

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11. 11
    ࣮ߦྫʢϑΥΞάϥ΢ϯυαʔϏεʣ
    

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12. 12
    ϑΥΞάϥ΢ϯυʹ͢Δʹ͸ʁ
    ͦͷͨΊɺ"OESPJE0Ͱ͸৽͍͠ϝιου
    /PUJpDBUJPO.BOBHFSTUBSU4FSWJDF*O'PSFHSPVOE
    Λಋೖ͍ͯ͠·͢ɻ

    ͜ͷϝιουΛݺͼग़͢͜ͱ͸ɺTUBSU4FSWJDF
    Λݺͼग़ͯ͠όοΫάϥ΢
    ϯυͰαʔϏεΛ࡞੒͠ɺ௚ޙʹͦͷαʔϏεͷTUBSU'PSFHSPVOE
    ϝιο
    υΛݺͼग़ͯ͠αʔϏεΛϑΥΞάϥ΢ϯυʹϓϩϞʔτ͢Δ͜ͱͱಉ౳Ͱ
    ͢ɻ
    ݟͨͱ͜ΖɺͦΕΒ͖͠ϝιου͸ͳ͍ɻࠓޙ௥Ճ͞ΕΔʁ

    $POUFYU8SBQQFSTUBSU'PSFHSPVOE4FSWJDF *OUFOU
    ͸͋ͬͨ
    https://developer.android.com/preview/features/background.html?hl=ja
    

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13. ϒϩʔυΩϟετͷ੍ݶ
    13
    

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14. 14
    ϒϩʔυΩϟετͷ੍ݶͱ͸
    "OESPJE0Λର৅ʹ͍ͯ͠ΔΞϓϦ͸ɺ҉໧తͳϒϩʔυ
    Ωϟετʹର͢ΔϒϩʔυΩϟετϨγʔόʔΛϚχϑΣ
    ετͰొ࿥Ͱ͖ͳ͘ͳΓ·ͨ͠ɻ

    ҉໧తͳϒϩʔυΩϟετͱ͸ɺλʔήοτʹ͢ΔΞϓϦ
    Λ໌֬ʹࢦఆ͠ͳ͍ϒϩʔυΩϟετͰ͢ɻ
    https://developer.android.com/preview/features/background.html?hl=ja
    

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15. 15
    ର৅ͱͳΔϒϩʔυΩϟετ
    ର৅ɿ
    w$0//&$5*7*5:@"$5*0/
    w"$5*0/@/&8@1*$563&
    w"$5*0/@/&8@7*%&0
    ର৅֎ɿ
    w#005@$0.1-&5&%
    w-0$"-&@$)"/(&%
    w64#@%&7*$&@"55"$)&%
    w)&"%4&5@1-6(

    FUD
    IUUQTEFWFMPQFSBOESPJEDPNQSFWJFXGFBUVSFTCBDLHSPVOECSPBEDBTUTIUNM IMKB
    

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16. ୅ସखஈ
    16
    

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17. 17
    ୅ସखஈ
    w ఆظతͳνΣοΫʹ͸+PC4DIFEVMFS΍"MBSN.BOBHFS
    w '$.ͳͲͷϓογϡ௨஌Ͱ୅ସ͢Δ͜ͱ΋Մೳ͔΋
    w $POUFU1SPWJEFSͷ಺༰Λಉظ͍ͨ͠ͳΒ4ZOD"EBQUFS
    w ϢʔβʔʹݟͤΔඞཁ͕͋ΔͳΒϑΥΞάϥ΢ϯυαʔϏε
    

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18. 18
    Alarms, Jobs, Services ͷ࢖͍෼͚
    

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19. 19
    JobIntentService?
    

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20. 20
    JobIntentService?
    w *OUFOU4FSWJDFͷΑ͏ʹ࢖͑ͯ
    w +PC4DIFEVMFS͕ϋϯυϧͯ͘͠ΕΔ
    w 8BLFGVM-PDL΋Α͠ͳʹ΍ͬͯ͘ΕΔ
    w 0Ҏલ͓ΑͼҎ߱Ͱ࢖͑Δ
    w 0ͷϩʔϯνલʹग़Δ͸ͣʂ
    

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21. 21
    ·ͱΊ
    w "OESPJE0ͷόοΫάϥ΢ϯυ੍ݶ
    w όοΫάϥ΢ϯυαʔϏε
    w ҉໧తϒϩʔυΩϟετ
    w ୅ସखஈ
    w ϑΥΞάϥ΢ϯυαʔϏε
    w +PC4DIFEVMFS"MBSN.BOBHFS4ZOD"EBQUFS
    w ϓογϡ௨஌
    w +PC*OUFOU4FSWJDF
    
    

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22. 22
    ·ͱΊ
    ϢʔβʔʹΞϯΠϯετʔϧ͞Εͳ͍Α͏ʹ

    ి஑ͱ3".ʹ༏͍͠ΞϓϦʹ͠·͠ΐ͏
    ɹɹ
    

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