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Service ?????

??????????????????????????????????????????? Service ???????????

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??????????????????????? Activity ????????? Activity ??????????????? Activity ???????????????????????

?? Service ???????????????

?????????????????????

• ?????????????? Activity ???????????????????????????????????????????????????????????????

?????? android:configChanges ??????? Activity ???????

• ?????????????????? ContentView ???????????????

?????? Service

• ???? Service???????????????????

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Service ?????

Service ?????????????????????????? UI ??????????????

1. startService() ??

• ?????? startService() ???? Service??????Service ??????????????? Service ?????????????? start ? Service ???????????????????????????????? Service ???? stopSelf() ???????? stopService() ?????

2. bindService() ??

• ???????? bindService() ????? Service??????? Service ??????????????????????????Service ?????? unBind ?????? Service ???????????????????????? unBind ????? Service ??????

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Service ?????

Service ??????????????????????

Service
??? onCreate()
??? onStartCommand() ? onBind()
?   ??? doWork()
?   ??? ...
??? onDestroy()

???

• Service ????????????????????????
• ???????entire lifetime??? onCreate() ????? onDestroy() ???
• ???????activity lifetime??? onStartCommand() ? onBind() ????????? startService() ? bindService() ???start ?????????????????????????? bind ???? onUnbind() ????Service ??????????

?????

• ??? startService() ?? bindService() ?? Service?onCreate() ? onDestroy() ??????

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Service ? onCreate() ?????????

Service ???????????????????????????????????????

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? Service ???????

???? Service ????????????????

?? Thread???????????????????????????????

?? AsyncTask ? HandlerThread??? Thread ?????

?????????????????????

??IntentService ??????????

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????? IntentService

IntentService ??? Service?? Service ???????????????? IntentService ????????????? onHandleIntent() ????????????? Intent ????????????????????????????????????????????? stopSelf() ???onHandleIntent() ??????????

?? IntentService ????

???????????? onStartCommand() ???? Intent?

???? onHandleIntent() ??????????? Intent ?????????????multi-threading???????

??????????????? Service??????? stopSelf() ???

????? onBind() ?????? null?

????? onStartCommand() ???????? Intent ????????? onHandleIntent()???????????? Intent ???

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??

?????? Service ????????? Service ?????????????????????????????? Service??? Service ????????????????????????????Service ? UI ????????????????????????????????????????????????????????????? Thread??? AsyncTask, ThreadHandler???????

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??????

???????????????????????????? Android ?????????????????????????????????????????????+?????????? + ??????????????????????????????????????

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??

?????????????????????????????????????

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Android ????????????????????

???????????????????????????~

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