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
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2. 2 I/Oηογϣϯ #BDLHSPVOE
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    https://www.youtube.com/watch?v=hbLAzwhBjFE
3. 3 ੍ݶ w όοΫάϥ΢ϯυαʔϏεͷ੍ݶ
   w ϒϩʔυΩϟετͷ੍ݶ
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4. 4 όοΫάϥ΢ϯυ੍ݶͱ͸ "OESPJE
   0
   Ͱ͸ɺϢʔβʔ
   ΤΫεϖϦΤϯεΛ޲্ͤ͞ΔͨΊʹɺΞϓϦ͕ όοΫάϥ΢ϯυͰ࣮ߦ͞Ε͍ͯΔͱ͖ͷಈ࡞Λ੍ݶ͍ͯ͠·͢ɻ
   https://developer.android.com/preview/features/background.html?hl=ja
5. 5 ͳͥʁ w 3".Ϛωʔδϝϯτ
   w লిྗ
6. όοΫάϥ΢ϯυαʔϏε ͷ੍ݶ 6
7. 7 όοΫάϥ΢ϯυαʔϏεͷ੍ݶ wՄࢹΞΫςΟϏςΟ͕͋Δ wՄࢹΞΫςΟϏςΟ͕ͳ͍ ˠ
   ϑΥΞόοΫ྆ํͷαʔϏεΛ࡞ΕΔ ˠ
   ϑΥΞάϥ΢ϯυ ˠ
   όοΫάϥ΢ϯυ ˠ
   όοΫάϥ΢ϯυαʔϏε͸਺෼Ͱఀࢭ͢Δ UBSHFU4EL7FSTJPO͕0ͷͱ͖ͷΈʂ
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));
9. 9 ࣮ߦྫʢόοΫάϥ΢ϯυαʔϏεʣ
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);
11. 11 ࣮ߦྫʢϑΥΞάϥ΢ϯυαʔϏεʣ
12. 12 ϑΥΞάϥ΢ϯυʹ͢Δʹ͸ʁ ͦͷͨΊɺ"OESPJE
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    Ͱ͸৽͍͠ϝιου
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    Λಋೖ͍ͯ͠·͢ɻ
 ͜ͷϝιουΛݺͼग़͢͜ͱ͸ɺTUBSU4FSWJDF
    Λݺͼग़ͯ͠όοΫάϥ΢ ϯυͰαʔϏεΛ࡞੒͠ɺ௚ޙʹͦͷαʔϏεͷ
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    ϝιο υΛݺͼग़ͯ͠αʔϏεΛϑΥΞάϥ΢ϯυʹϓϩϞʔτ͢Δ͜ͱͱಉ౳Ͱ ͢ɻ
    ݟͨͱ͜ΖɺͦΕΒ͖͠ϝιου͸ͳ͍ɻࠓޙ௥Ճ͞ΕΔʁ
 $POUFYU8SBQQFSTUBSU'PSFHSPVOE4FSWJDF *OUFOU ͸͋ͬͨ https://developer.android.com/preview/features/background.html?hl=ja
13. ϒϩʔυΩϟετͷ੍ݶ 13
14. 14 ϒϩʔυΩϟετͷ੍ݶͱ͸ "OESPJE
    0
    Λର৅ʹ͍ͯ͠ΔΞϓϦ͸ɺ҉໧తͳϒϩʔυ Ωϟετʹର͢ΔϒϩʔυΩϟετϨγʔόʔΛϚχϑΣ ετͰొ࿥Ͱ͖ͳ͘ͳΓ·ͨ͠ɻ
 ҉໧తͳϒϩʔυΩϟετͱ͸ɺλʔήοτʹ͢ΔΞϓϦ Λ໌֬ʹࢦఆ͠ͳ͍ϒϩʔυΩϟετͰ͢ɻ https://developer.android.com/preview/features/background.html?hl=ja
15. 15 ର৅ͱͳΔϒϩʔυΩϟετ ର৅ɿ
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16. ୅ସखஈ 16
17. 17 ୅ସखஈ w ఆظతͳνΣοΫʹ͸
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    w ϢʔβʔʹݟͤΔඞཁ͕͋ΔͳΒϑΥΞάϥ΢ϯυαʔϏε
18. 18 Alarms, Jobs, Services ͷ࢖͍෼͚
19. 19 JobIntentService?
20. 20 JobIntentService? w *OUFOU4FSWJDF
    ͷΑ͏ʹ࢖͑ͯ
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    w 0Ҏલ͓ΑͼҎ߱Ͱ࢖͑Δ
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21. 21 ·ͱΊ w "OESPJE
    0ͷόοΫάϥ΢ϯυ੍ݶ
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    w ҉໧తϒϩʔυΩϟετ
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22. 22 ·ͱΊ ϢʔβʔʹΞϯΠϯετʔϧ͞Εͳ͍Α͏ʹ
 ి஑ͱ3".ʹ༏͍͠ΞϓϦʹ͠·͠ΐ͏ ɹɹ