毕业论文外文翻译-广播接收者

《毕业论文外文翻译-广播接收者》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、本科生毕业设计（论文）外文翻译　题　　目手机防盗系统的设计与实现姓　　名　　　　　　　　　　学　　号　　　　　学　院　信息工程学院　　　　专　　业　计算机科学与技术　　指导教师　　　　　　　　　　　2014年　4　月　10　日原文：BroadcastReceiverpublicabstractclassBroadcastReceiverextendsObjectjava.lang.Object↳android.content.BroadcastReceiverKnownDirectSubclassesAppWidgetProvider,DeviceAdmi

2、nReceiver,WakefulBroadcastReceiverClassOverviewBaseclassforcodethatwillreceiveintentssentbysendBroadcast().Ifyoudon'tneedtosendbroadcastsacrossapplications,considerusingthisclasswithLocalBroadcastManagerinsteadofthemoregeneralfacilitiesdescribedbelow.Thiswillgiveyouamuchmoreeffici

3、entimplementation(nocross-processcommunicationneeded)andallowyoutoavoidthinkingaboutanysecurityissuesrelatedtootherapplicationsbeingabletoreceiveorsendyourbroadcasts.YoucaneitherdynamicallyregisteraninstanceofthisclasswithContext.registerReceiver()orstaticallypublishanimplementati

4、onthroughthetaginyourAndroidManifest.xml.Note:IfregisteringareceiverinyourActivity.onResume()implementation,youshouldunregisteritinActivity.onPause().(Youwon'treceiveintentswhenpaused,andthiswillcutdownonunnecessarysystemoverhead).DonotunregisterinActivity.onSaveInstance

5、State(),becausethiswon'tbecallediftheusermovesbackinthehistorystack.Therearetwomajorclassesofbroadcaststhatcanbereceived:Normalbroadcasts(sentwithContext.sendBroadcast)arecompletelyasynchronous.Allreceiversofthebroadcastareruninanundefinedorder,oftenatthesametime.Thisismoreefficie

6、nt,butmeansthatreceiverscannotusetheresultorabortAPIsincludedhere.Orderedbroadcasts(sentwithContext.sendOrderedBroadcast)aredeliveredtoonereceiveratatime.Aseachreceiverexecutesinturn,itcanpropagatearesulttothenextreceiver,oritcancompletelyabortthebroadcastsothatitwon'tbepassedtoot

7、herreceivers.Theorderreceiversrunincanbecontrolledwiththeandroid:priorityattributeofthematchingintent-filter;receiverswiththesameprioritywillberuninanarbitraryorder.Eveninthecaseofnormalbroadcasts,thesystemmayinsomesituationsreverttodeliveringthebroadcastonereceiveratatime.Inparti

8、cular,forreceiversthatmayrequiret