AlarmManager的使用

節(jié)約紙巾 · 發(fā)表于 2013-8-28 16:30

5AlarmManager--全局定時(shí)器

（1）在指定時(shí)長(zhǎng)后執(zhí)行某項(xiàng)操作

// 發(fā)送一個(gè)廣播，廣播接收后Toast提示定時(shí)操作完成
Intent intent =newIntent(Main.this, alarmreceiver.class);
intent.setAction("short");
PendingIntent sender=PendingIntent.getBroadcast(Main.this, 0, intent, 0);
// 設(shè)定一個(gè)五秒后的時(shí)間
Calendar calendar=Calendar.getInstance();
calendar.setTimeInMillis(System.currentTimeMillis());
calendar.add(Calendar.SECOND, 5);       AlarmManager alarm=(AlarmManager)getSystemService(ALARM_SERVICE);
alarm.set(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(), sender);

Toast.makeText(Main.this, "五秒后alarm開啟", Toast.LENGTH_LONG).show();

（2）周期性的執(zhí)行某項(xiàng)操作

Intent intent =newIntent(Main.this, alarmreceiver.class);
intent.setAction("repeating");
PendingIntent  sender=PendingIntent       .getBroadcast(Main.this, 0, intent, 0);
//開始時(shí)間
long firstime=SystemClock.elapsedRealtime();
AlarmManager am=(AlarmManager)getSystemService(ALARM_SERVICE);
//5秒一個(gè)周期，不停的發(fā)送廣播 am.setRepeating(AlarmManager.ELAPSED_REALTIME_WAKEUP, firstime, 5*1000, sender);

//注意：receiver記得在manifest.xml注冊(cè)

public static class alarmreceiver extends BroadcastReceiver{
@Override
public void onReceive(Context context, Intent intent) {
// TODO Auto-generated method stub
if
(intent.getAction().equals("short")){
Toast.makeText(context, "short alarm",Toast.LENGTH_LONG).show();
}else{
Toast.makeText(context, "repeating alarm", Toast.LENGTH_LONG).show();
}
}
}

AlarmManager的取消：（其中需要注意的是取消的Intent必須與啟動(dòng)Intent保持絕對(duì)一致才能支持取消AlarmManager）

Intent intent =new Intent(Main.this, alarmreceiver.class);
intent.setAction("repeating");
PendingIntent sender=PendingIntent.getBroadcast(Main.this, 0, intent, 0);
AlarmManager alarm=(AlarmManager)getSystemService(ALARM_SERVICE);
alarm.cancel(sender);

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AlarmManager的使用

AlarmManager的使用

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