android - AltBeacon 应用程序在几分钟后重新启动

Question

我的应用程序有一些问题。在我禁用 regionBootstrap 并通过 System.exit(0) 关闭应用程序后，我的应用程序会在几分钟后(通常是 3-4 分钟)自行重启。

这是我每次重新启动应用程序时发现的 Logcat 行:

2018-11-24 14:54:34.883 897-1339/? V/AlarmManager: Triggering alarm #1: 2 when =969099760 package =walkenrollment.com.acc operation =*walarm*:walkenrollment.com.acc/org.altbeacon.beacon.startup.StartupBroadcastReceiver flags =0x0
2018-11-24 14:54:34.941 897-1136/? I/ActivityManager: Start proc 11637:walkenrollment.com.acc/u0a181 for broadcast walkenrollment.com.acc/org.altbeacon.beacon.startup.StartupBroadcastReceiver
2018-11-24 14:54:35.037 897-11631/? D/OnePlusSmartBoostManager: writeHotCount walkenrollment.com.acc, pid=11637
2018-11-24 14:54:35.107 11637-11637/walkenrollment.com.acc I/ollment.com.ac: The ClassLoaderContext is a special shared library.
2018-11-24 14:54:35.210 11637-11637/walkenrollment.com.acc W/ollment.com.ac: JIT profile information will not be recorded: profile file does not exits.
2018-11-24 14:54:35.211 11637-11637/walkenrollment.com.acc I/chatty: uid=10181(walkenrollment.com.acc) identical 10 lines
2018-11-24 14:54:35.212 11637-11637/walkenrollment.com.acc W/ollment.com.ac: JIT profile information will not be recorded: profile file does not exits.
2018-11-24 14:54:35.219 11637-11637/walkenrollment.com.acc I/Perf: Connecting to perf service.
2018-11-24 14:54:35.207 11637-11637/walkenrollment.com.acc W/ollment.com.acc: type=1400 audit(0.0:2234740): avc: denied { read } for name="u:object_r:vendor_iop_prop:s0" dev="tmpfs" ino=17676 scontext=u:r:untrusted_app_27:s0:c512,c768 tcontext=u:object_r:vendor_iop_prop:s0 tclass=file permissive=0
2018-11-24 14:54:35.207 11637-11637/walkenrollment.com.acc W/ollment.com.acc: type=1400 audit(0.0:2234741): avc: denied { read } for name="u:object_r:vendor_iop_prop:s0" dev="tmpfs" ino=17676 scontext=u:r:untrusted_app_27:s0:c512,c768 tcontext=u:object_r:vendor_iop_prop:s0 tclass=file permissive=0
2018-11-24 14:54:35.222 11637-11637/walkenrollment.com.acc E/libc: Access denied finding property "vendor.perf.iop_v3.enable"
2018-11-24 14:54:35.222 11637-11637/walkenrollment.com.acc E/libc: Access denied finding property "vendor.perf.iop_v3.enable.debug"
2018-11-24 14:54:35.233 11637-11637/walkenrollment.com.acc I/InstantRun: starting instant run server: is main process
2018-11-24 14:54:35.235 11637-11637/walkenrollment.com.acc V/Font: Change font:2
2018-11-24 14:54:35.242 11637-11637/walkenrollment.com.acc I/BeaconManager: BeaconManager started up on pid 11637 named 'walkenrollment.com.acc' for application package 'walkenrollment.com.acc'.  isMainProcess=true
2018-11-24 14:54:35.245 11637-11637/walkenrollment.com.acc D/BeaconParser:          Parsing beacon layout: m:2-3=beac,i:4-19,i:20-21,i:22-23,p:24-24,d:25-25
2018-11-24 14:54:35.246 11637-11637/walkenrollment.com.acc D/BeaconParser: Parsing beacon layout: m:0-3=4c000215,i:4-19,i:20-21,i:22-23,p:24-24
2018-11-24 14:54:35.247 11637-11637/walkenrollment.com.acc D/BeaconParser: Parsing beacon layout: x,s:0-1=feaa,m:2-2=20,d:3-3,d:4-5,d:6-7,d:8-11,d:12-15

可能是什么原因？ OnePlusSmartBoostManager 是问题的根源吗？如何避免我的应用以这种方式重启？

这些是重启前几分钟来自 logcat 的其他行:

2018-11-24 14:48:40.989 897-2922/? I/ActivityManager: Process walkenrollment.com.acc (pid 11211) has died: fore RCVR
2018-11-24 14:48:40.991 897-912/? I/WindowManager: WIN DEATH: Window{b786f1c u0 walkenrollment.com.acc/walkenrollment.com.acc.MainActivity}
2018-11-24 14:48:40.991 897-912/? W/InputDispatcher: Attempted to unregister already unregistered input channel 'b786f1c walkenrollment.com.acc/walkenrollment.com.acc.MainActivity (server)'
2018-11-24 14:51:30.213 897-1132/? D/RestartProcessManager: updateSelf :  walkenrollment.com.acc, size : 30
2018-11-24 14:51:30.214 897-1132/? D/RestartProcessManager: walkenrollment.com.acc got score 0.45182973997082543 in DayDuration for duration : 16565
2018-11-24 14:51:30.214 897-1132/? D/RestartProcessManager: walkenrollment.com.acc got score 100.0 in DayLRU for LRU diff : 49716982
2018-11-24 14:51:30.214 897-1132/? D/RestartProcessManager: walkenrollment.com.acc got score 33.33333333333333 in DayLaunchTimes for launch times : 5
2018-11-24 14:51:30.215 897-1132/? D/RestartProcessManager: walkenrollment.com.acc : X : 11871.538678708397, Y : 3274.222404673991, Z : 23827.1189741647

Answer 1

一旦您开始测距或监控，该库将尝试在后台甚至在应用程序终止后继续运行。该库之所以这样做，是因为操作系统或用户通常会在内存不足或用户在前台使用完应用程序时终止该应用程序。

自动重启是通过多种技术实现的，包括 5 分钟的 AlarmManager 计时器和 START_STICKY 服务标志 (Android 4.3-7.x) 以及 15 分钟的 JobService (Android 8+)。这允许在后台扫描信标以在发现时自动启动您的应用程序逻辑，并且默认情况下以最少的系统资源执行此操作。

应用程序自动重启，因为 System.exit(0) 有效地使您的应用程序崩溃，使库扫描处于启用状态。

如果您不希望这种情况发生，您必须先干净地关闭扫描。停止测距和/或监控，然后解除与 BeaconManager 的绑定(bind)(如果您绑定(bind)到它)或调用 RegionBootstrap 上的 disable()(如果您使用它来启动扫描)。