AlarmManager and NotificationManager sample code

This is not a complete tutorial on how to use AlarmManager and NotificationManager, but a simple sample.

The scenario is I want to have an alarm set to certain time. When it goes off, it show notification icon on status bar. When click on the notification, it will start an activity.

1. Create the BroadcastReceiver

public class AlarmReceiver extends BroadcastReceiver {
    @Override
    public void onReceive(Context context, Intent intent) {
        NotificationManager mNM;
        mNM = (NotificationManager)context.getSystemService(context.NOTIFICATION_SERVICE);
        // Set the icon, scrolling text and timestamp
        Notification notification = new Notification(R.drawable.icon, "Test Alarm",
        System.currentTimeMillis());
        // The PendingIntent to launch our activity if the user selects this notification
        PendingIntent contentIntent = PendingIntent.getActivity(context, 0, new Intent(context, TestActivity.class), 0);
        // Set the info for the views that show in the notification panel.
        notification.setLatestEventInfo(context, context.getText(R.string.alarm_service_label), "This is a Test Alarm", contentIntent);
        // Send the notification.
        // We use a layout id because it is a unique number. We use it later to cancel.
        mNM.notify(R.string.alarm_service_label, notification);
    }
}

2. Add Receiver to Manifest.xml

<receiver android:process=":remote" android:name="AlarmReceiver"></receiver>

3. Set the alarm

public class AlarmService {
    private Context context;
    private PendingIntent mAlarmSender;
    public AlarmService(Context context) {
        this.context = context;
        mAlarmSender = PendingIntent.getBroadcast(context, 0, new Intent(context, AlarmReceiver.class), 0);
    }

    public void startAlarm(){
        //Set the alarm to 10 seconds from now
        Calendar c = Calendar.getInstance();
        c.add(Calendar.SECOND, 10);
        long firstTime = c.getTimeInMillis();
        // Schedule the alarm!
        AlarmManager am = (AlarmManager)context.getSystemService(Context.ALARM_SERVICE);
        am.set(AlarmManager.RTC_WAKEUP, firstTime, mAlarmSender);
    }
}