我在前台运行服务.有时它会被终止,大概是出于内存的原因(尽管我对LogCat日志并不是100%肯定).已终止的其他服务计划在5000毫秒内重新启动,但查看日志,我的服务重新启动时间很长,例如:
11-15 15:39:48.756: W/ActivityManager(375): Scheduling restart of crashed service com.example.app/com.example.SensorService in 1019562ms
解决方法
从
com/android/server/am/ActiveServices.java(未曝光)
// How long we wait for a service to finish executing. static final int SERVICE_TIMEOUT = 20*1000; // How long a service needs to be running until restarting its process // is no longer considered to be a relaunch of the service. static final int SERVICE_RESTART_DURATION = 5*1000; // How long a service needs to be running until it will start back at // SERVICE_RESTART_DURATION after being killed. static final int SERVICE_RESET_RUN_DURATION = 60*1000; // Multiplying factor to increase restart duration time by,for each time // a service is killed before it has run for SERVICE_RESET_RUN_DURATION. static final int SERVICE_RESTART_DURATION_FACTOR = 4; // The minimum amount of time between restarting services that we allow. // That is,when multiple services are restarting,we won't allow each // to restart less than this amount of time from the last one. static final int SERVICE_MIN_RESTART_TIME_BETWEEN = 10*1000; // Maximum amount of time for there to be no activity on a service before // we consider it non-essential and allow its process to go on the // LRU background list. static final int MAX_SERVICE_INACTIVITY = 30*60*1000;
你发生的事情可能是你的服务比SERVICE_RESET_RUN_DURATION快死,然后重启时间乘以SERVICE_RESTART_DURATION_FACTOR.
从第881行开始:
// If it has been a "reasonably long time" since the service // was started,then reset our restart duration back to // the beginning,so we don't infinitely increase the duration // on a service that just occasionally gets killed (which is // a normal case,due to process being killed to reclaim memory). if (now > (r.restartTime+resetTime)) { r.restartCount = 1; r.restartDelay = minDuration; } else { if ((r.serviceInfo.applicationInfo.flags &ApplicationInfo.FLAG_PERSISTENT) != 0) { // Services in peristent processes will restart much more // quickly,since they are pretty important. (Think systemUI). r.restartDelay += minDuration/2; } else { r.restartDelay *= SERVICE_RESTART_DURATION_FACTOR; if (r.restartDelay < minDuration) { r.restartDelay = minDuration; } } }
下面的行将支持您的服务.
r.restartDelay *= SERVICE_RESTART_DURATION_FACTOR;
因此,如果您的服务在运行SERVICE_RESET_RUN_DURATION之前死亡,您应该修复此案例.