Android Alarm闹钟

1，设置闹钟(只响一次)

Intent intent = new Intent(AlarmController.this, OneShotAlarm.class);
            PendingIntent sender = PendingIntent.getBroadcast(AlarmController.this,0, intent, 0);

            Calendar calendar = Calendar.getInstance();
            calendar.setTimeInMillis(System.currentTimeMillis());
            calendar.add(Calendar.SECOND, 30);

            // Schedule the alarm!
            AlarmManager am = (AlarmManager)getSystemService(ALARM_SERVICE);
            am.set(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), sender);

2,重复闹钟

Intent intent = new Intent(AlarmController.this, RepeatingAlarm.class);
            PendingIntent sender = PendingIntent.getBroadcast(AlarmController.this,0, intent, 0);
            
            long firstTime = SystemClock.elapsedRealtime();
            firstTime += 15*1000;

            AlarmManager am = (AlarmManager)getSystemService(ALARM_SERVICE);
            am.setRepeating(AlarmManager.ELAPSED_REALTIME_WAKEUP,firstTime, 15*1000, sender);

3，取消闹钟

Intent intent = new Intent(AlarmController.this, RepeatingAlarm.class);
            PendingIntent sender = PendingIntent.getBroadcast(AlarmController.this,0, intent, 0);
            
            AlarmManager am = (AlarmManager)getSystemService(ALARM_SERVICE);
            am.cancel(sender);

-----------------------------------分割线----------------------------------

一：OneShotAlarm.class/RepeatingAlarm.class

另外的Activity（Activity，Service，BroadcastReceiver）

二：PendingIntent字面意思是挂件意图

英文解释：*AdescriptionofanIntentandtargetactiontoperformwithit.

*Instancesofthisclassarecreatedwith{@link#getActivity},

*{@link#getBroadcast},{@link#getService};thereturnedobjectcanbe

*handedtootherapplicationssothattheycanperformtheactionyou

*describedonyourbehalfatalatertime.

PendingIntent就是一个Intent的描述，我们可以把这个描述交给别的程序，别的程序根据这个描述在后面的别的时间做你安排做的事情