私はこの 3 つのユース ケースについてより多くの情報を持っています。私はこの 3 つのケースを試しました。それぞれについて、アプリを起動し、サービスをバインドし、アクティビティをバックグラウンドに置いた後 (ホーム ボタンを押す)、「dumpsys アクティビティ プロセス」を実行しました。
最初のケース (onBind() で startService() を呼び出すだけ):
*APP* UID 10137 ProcessRecord{40b01d30 6719:com.mypackage:service_process/10137}
class=com.mypackage.app.MyApp
dir=/data/app/com.mypackage-1.apk publicDir=/data/app/com.mypackage-1.apk data=/data/data/com.mypackage
packageList=[com.mypackage]
thread=android.app.ApplicationThreadProxy@40d1b540 curReceiver=null
pid=6719 starting=false lastPss=0
lastActivityTime=-1m42s491ms lruWeight=671144 keeping=true hidden=false empty=true
oom: max=15 hidden=8 curRaw=4 setRaw=4 cur=4 set=4
curSchedGroup=1 setSchedGroup=1
setIsForeground=false foregroundServices=false forcingToForeground=null
persistent=false removed=false
adjSeq=5157 lruSeq=1017
lastRequestedGc=-1m46s82ms lastLowMemory=-1m46s82ms reportLowMemory=false
services=[ServiceRecord{40a68aa0 com.mypackage/.model.page.ServerConnection}]
connections=[ConnectionRecord{40d11118 com.mypackage/.util.CommonService:@40d12928}, ConnectionRecord{40bca008 com.mypackage/.model.page.ServerConnection:@40d0bd08}, ConnectionRecord{40d64030 com.mypackage/.util.log.LoggerService:@40d34b38}]
Running processes (most recent first):
Proc #16: adj=svc /B 40b01d30 6719:com.mypackage:service_process/10137 (started-services)
2 番目のケース (onCreate() で startForeground() のみを呼び出す):
*APP* UID 10137 ProcessRecord{40c47420 7921:com.mypackage:service_process/10137}
class=com.mypackage.app.MyApp
dir=/data/app/com.mypackage-2.apk publicDir=/data/app/com.mypackage-2.apk data=/data/data/com.mypackage
packageList=[com.mypackage]
thread=android.app.ApplicationThreadProxy@40a044c8 curReceiver=null
pid=7921 starting=false lastPss=0
lastActivityTime=-27s701ms lruWeight=1232643 keeping=true hidden=false empty=false
oom: max=15 hidden=8 curRaw=2 setRaw=2 cur=2 set=2
curSchedGroup=0 setSchedGroup=0
setIsForeground=false foregroundServices=true forcingToForeground=null
persistent=false removed=false
adjSeq=6068 lruSeq=1170
lastRequestedGc=-32s123ms lastLowMemory=-32s123ms reportLowMemory=false
services=[ServiceRecord{40b3b1d0 com.mypackage/.model.page.ServerConnection}]
connections=[ConnectionRecord{40b18da8 com.mypackage/.util.log.LoggerService:@40b18b88}, ConnectionRecord{40c86fa0 com.mypackage/.model.page.ServerConnection:@40c86d80}, ConnectionRecord{40c869a0 com.mypackage/.util.CommonService:@409626c8}]
Running processes (most recent first):
Proc #18: adj=prcp /F 40c47420 7921:com.mypackage:service_process/10137 (foreground-service)
3 番目のケース (onBind() 内の startService() および onCreate() 内の startForeground() のいずれかを呼び出す):
*APP* UID 10137 ProcessRecord{40d35d30 8407:com.mypackage:service_process/10137}
class=com.mypackage.app.MyApp
dir=/data/app/com.mypackage-1.apk publicDir=/data/app/com.mypackage-1.apk data=/data/data/com.mypackage
packageList=[com.mypackage]
thread=android.app.ApplicationThreadProxy@40a6f7a0 curReceiver=null
pid=8407 starting=false lastPss=0
lastActivityTime=-6s98ms lruWeight=1423485 keeping=true hidden=false empty=false
oom: max=15 hidden=7 curRaw=2 setRaw=2 cur=2 set=2
curSchedGroup=0 setSchedGroup=0
setIsForeground=false foregroundServices=true forcingToForeground=null
persistent=false removed=false
adjSeq=6565 lruSeq=1289
lastRequestedGc=-10s334ms lastLowMemory=-10s334ms reportLowMemory=false
services=[ServiceRecord{40ba7650 com.mypackage/.model.page.ServerConnection}]
connections=[ConnectionRecord{40ac5408 com.mypackage/.model.page.ServerConnection:@40ac5228}, ConnectionRecord{40c760e8 com.mypackage/.util.CommonService:@40c31fa8}, ConnectionRecord{40c31c00 com.mypackage/.util.log.LoggerService:@40bc4bf0}]
Running processes (most recent first):
Proc #13: adj=prcp /F 40d35d30 8407:com.mypackage:service_process/10137 (foreground-service)
デフォルトのケース (startService() と startForeground() を呼び出さず、バインド サービスのみ):
*APP* UID 10137 ProcessRecord{40c3eb78 5609:com.mypackage:service_process/10137}
class=com.mypackage.app.MyApp
dir=/data/app/com.mypackage-2.apk publicDir=/data/app/com.mypackage-2.apk data=/data/data/com.mypackage
packageList=[com.mypackage]
thread=android.app.ApplicationThreadProxy@40a34c90 curReceiver=null
pid=5609 starting=false lastPss=0
lastActivityTime=-5m31s175ms lruWeight=227344 keeping=false hidden=true empty=true
oom: max=15 hidden=7 curRaw=7 setRaw=7 cur=7 set=7
curSchedGroup=1 setSchedGroup=1
setIsForeground=false foregroundServices=false forcingToForeground=null
persistent=false removed=false
adjSeq=4483 lruSeq=887
lastWakeTime=0 time used=0
lastCpuTime=0 time used=0
lastRequestedGc=-2m1s649ms lastLowMemory=-6m7s191ms reportLowMemory=false
services=[ServiceRecord{40d559b8 com.mypackage/.model.page.ServerConnection}]
connections=[ConnectionRecord{40beeef0 com.mypackage/.model.page.ServerConnection:@40bd4620}, ConnectionRecord{40bc4c60 com.mypackage/.util.CommonService:@40b69ea0}, ConnectionRecord{40ac74b0 com.mypackage/.util.log.LoggerService:@40ab5d60}]
Running processes (most recent first):
Proc #22: adj=bak+3/B 40c3eb78 5609:com.mypackage:service_process/10137 (bg-empty)
最も重要なことは、すべてのケースで変化し、これらの値を想定するadj の値だと思います。
1) サービス
2) prcp
3) バク