Show Notification at particular time with AlarmManager

问题

I need to display a notification daily at particular time (for example: 4.25PM). I am using AlarmManager and Notification. I set the alarm on landing page of the application. I also have implemented the BroadcastReceiver for it.

Code to set the alarm:

Calendar calendar = Calendar.getInstance();
calendar.set(Calendar.HOUR_OF_DAY, 16);
calendar.set(Calendar.MINUTE, 25);
calendar.set(Calendar.SECOND, 0);

Intent notificationmassage = new Intent(getApplicationContext(),Notificationmassage.class);

//This is alarm manager
PendingIntent pi = PendingIntent.getService(this, 0 , notificationmassage, PendingIntent.FLAG_UPDATE_CURRENT);
AlarmManager am = (AlarmManager) getSystemService(ALARM_SERVICE);
am.setRepeating(AlarmManager.RTC_WAKEUP, calendar.getTimeInMillis(),
        AlarmManager.INTERVAL_DAY, pi);

This is the broadcast receiver

public class Notificationmassage extends BroadcastReceiver {

    @Override
    public void onReceive(Context context, Intent arg1) {
        showNotification(context);
    }

    private void showNotification(Context context) {
        Log.i("notification", "visible");

        PendingIntent contentIntent = PendingIntent.getActivity(context, 0,
                new Intent(context, Notificationmassage.class), 0);

        NotificationCompat.Builder mBuilder =
            new NotificationCompat.Builder(context)
                .setSmallIcon(R.drawable.ic_launcher)
                .setContentTitle("xyz")
                .setContentText("It will contain dummy content");
        mBuilder.setContentIntent(contentIntent);
        mBuilder.setDefaults(Notification.DEFAULT_SOUND);
        mBuilder.setAutoCancel(true);
        NotificationManager mNotificationManager = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE);
        mNotificationManager.notify(1, mBuilder.build());
    }  
}

What is wrong with this approach?

回答1:

Add reciever to Manifest.xml if you don't do this before.

 <receiver android:name="org.yourapp.Notificationmassage"></receiver>

in application section

    <application>
       ....

       <receiver android:name="org.yourapp.Notificationmassage"></receiver>

    </application>

If you already do that, please edit your question and show your Manifest.xml

来源：https://stackoverflow.com/questions/26037211/show-notification-at-particular-time-with-alarmmanager