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我有在状态栏中显示通知的代码。我知道可以通过setLatestEventInfo()再次调用来完成更新，但我希望每半小时完成一次更新。
我如何跟踪时间？有人知道有什么功能吗？
我什至想过使用每半小时递增一次的计数器，但再次检索时间是一个问题。

String ns = Context.NOTIFICATION_SERVICE;

NotificationManager mNotificationManager = (NotificationManager) getSystemService(ns);

int icon = R.drawable.index1;
CharSequence tickerText = "Hello";

long when = System.currentTimeMillis();
Notification notification = new Notification(icon, tickerText, when);
Context context = getApplicationContext();
CharSequence notificationTitle = "My notification";
CharSequence notificationText = "Hello World!";

Intent notificationIntent = new Intent(this, NotificationAppActivity.class);
PendingIntent contentIntent = PendingIntent.getActivity(this, 0, notificationIntent, 0);
notification.setLatestEventInfo(context, notificationTitle, notificationText, contentIntent);

final int HELLO_ID = 1;

mNotificationManager.notify(HELLO_ID, notification);
notification.defaults |= Notification.DEFAULT_SOUND;
notification.defaults |= Notification.DEFAULT_VIBRATE;
notification.defaults |= Notification.DEFAULT_LIGHTS;
}
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2 回答 2

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您必须使用AlarmManager并每 30 分钟安排一次重复事件。然后您需要处理此事件并在广播接收器中onReceive()更新您的通知，但通常发送Intent到您的服务来完成这项工作。

示例代码：

Intent intent = new Intent(this, MyAlarmBroadcastReceiver.class);
PendingIntent sender = PendingIntent.getBroadcast(this, 0, intent, PendingIntent.FLAG_UPDATE_CURRENT);
AlarmManager am = (AlarmManager) this.getSystemService(Context.ALARM_SERVICE);
long recurring = (30 * 60000);  // in milliseconds
am.setRepeating(AlarmManager.RTC, Calendar.getInstance().getTimeInMillis(), recurring, sender);

并且您MyAlarmBroadcastReceiver的BroadcastReceiver代码在onReceive(). 我更喜欢使用一个广播接收器，因此我还向意图添加了一些额外的数据，以便我的广播接收器知道它应该做什么，但如果你愿意，你可以将它分开。

public class MyBroadcastReceiver extends BroadcastReceiver {
   @Override
   public void onReceive( Context context, Intent intent ) {

     // ... do what you need to do here...

   }
}
于 2012-09-27T17:38:40.703 回答
0

使用 alarmManager，如下例所示：

AlarmManager mgr=(AlarmManager)context.getSystemService(Context.ALARM_SERVICE);
Intent i=new Intent(context, OnAlarmReceiver.class);
PendingIntent pi=PendingIntent.getBroadcast(context, 0, i, 0);

mgr.setRepeating(AlarmManager.ELAPSED_REALTIME_WAKEUP, SystemClock.elapsedRealtime(), PERIOD, pi);
于 2012-09-27T18:11:02.607 回答