Android6.0 设备Idle状态(二)AlarmManagerService setIdleUntil接口.doc

Android6.0 设备Idle状态（二）AlarmManagerService setIdleUntil接口 一、set接口对flag中带了FLAG_IDLE_UNTIL的Alarm处理 先来看AlarmManager中： [java] view plain copy 在CODE上查看代码片派生到我的代码片 public void setIdleUntil(int type, long triggerAtMillis, PendingIntent operation) { setImpl(type, triggerAtMillis, WINDOW_EXACT, 0, FLAG_IDLE_UNTIL, operation, null, null); } 这个接口就是在flag中带了FLAG_IDLE_UNTIL。 我们再来看下AlarmManagerService中的set函数： [java] view plain copy 在CODE上查看代码片派生到我的代码片 private final IBinder mService = new IAlarmManager.Stub() { @Override public void set(int type, long triggerAtTime, long windowLength, long interval, int flags, PendingIntent operation, WorkSource workSource, AlarmManager.AlarmClockInfo alarmClock) { final int callingUid = Binder.getCallingUid(); if (workSource != null) { getContext().enforcePermission( android.Manifest.permission.UPDATE_DEVICE_STATS, Binder.getCallingPid(), callingUid, AlarmManager.set); } // No incoming callers can request either WAKE_FROM_IDLE or // ALLOW_WHILE_IDLE_UNRESTRICTED -- we will apply those later as appropriate. flags = ~(AlarmManager.FLAG_WAKE_FROM_IDLE | AlarmManager.FLAG_ALLOW_WHILE_IDLE_UNRESTRICTED); // Only the system can use FLAG_IDLE_UNTIL -- this is used to tell the alarm // manager when to come out of idle mode, which is only for DeviceIdleController. if (callingUid != Process.SYSTEM_UID) {//如果不是系统应用不能拥有该flag flags = ~AlarmManager.FLAG_IDLE_UNTIL; } 不是系统应用不能应有该flag。注释的说明也是这个flag只给DeviceIdleController用。 二、setImplLocked函数 继续分析setImplLocked函数 [java] view plain copy 在CODE上查看代码片派生到我的代码片 private void setImplLocked(Alarm a, boolean rebatching, boolean doValidate) { if ((a.flagsAlarmManager.FLAG_IDLE_UNTIL) != 0) {//是该flag // This is a special alarm that will put the system into idle until it