android闹钟功能报告.docVIP

ADROID 2.1 架构解析闹钟 1 设置定时时间 文件：packages/apps/alarmclock/src/com/android/alarmclock/Alarms.java private static void enableAlert(Context context, final Alarm alarm, ??????????? final long atTimeInMillis) { ??????? AlarmManager am = (AlarmManager) ??????????????? context.getSystemService(Context.ALARM_SERVICE); ????????????? ... ??????? am.set(AlarmManager.RTC_WAKEUP, atTimeInMillis, sender); ?????? ?????? ... ??? } 由闹钟管理器设置定时时间。 2 闹钟管理器 2.1 定时设置 文件：frameworks/base/core/java/android/app/AlarmManager.java public static final int RTC_WAKEUP = 0; ??? public static final int RTC = 1; ??? public static final int ELAPSED_REALTIME_WAKEUP = 2; public static final int ELAPSED_REALTIME = 3; ? ??? AlarmManager(IAlarmManager service) { ??????? mService = service; ??? } ??? public void set(int type, long triggerAtTime, PendingIntent operation) { ??????? try { ??????????? mService.set(type, triggerAtTime, operation); ??????? } catch (RemoteException ex) { ??????? } ??? } 将type, triggerAtTime, operation等参数转向闹钟管理器服务。 3 闹钟管理器服务 文件：frameworks/base/services/java/com/android/server/AlarmManagerService.java 3.1 定时设置 public AlarmManagerService(Context context) { ???????? mDescriptor = init(); ?????? ????? ... } public void set(int type, long triggerAtTime, PendingIntent operation) { ??????? setRepeating(type, triggerAtTime, 0, operation); ??? } ??? ??? public void setRepeating(int type, long triggerAtTime, long interval, ??????????? PendingIntent operation) { ??????? if (operation == null) { ??????????? Log.w(TAG, set/setRepeating ignored because there is no intent); ??????????? return; ??????? } ??????? synchronized (mLock) { ??????????? Alarm alarm = new Alarm(); ??????????? alarm.type = type; ??????????? alarm.when = triggerAtTime; ??????????? alarm.repeatInterval = interval; ??????????? alarm.operation = operation; ? ??????????? // Remove this alarm if already scheduled. ??????????? removeLocked(operation); ? ??????????? if (localLOGV) Log.v(TAG, set: + alarm); ? ??????????? int