Nie można znaleźć symbolu NOTIFICATION_SERVICE?

Question

package com.test.app; 
import android.app.Notification; 
import android.app.NotificationManager; 
import android.app.PendingIntent; 
import android.content.BroadcastReceiver; 
import android.content.Context; 
import android.content.Intent; 

public class runOnBoot extends BroadcastReceiver{ 

    @Override 
    public void onReceive(Context context, Intent intent) { 

      NotificationManager nm = (NotificationManager)getSystemService(NOTIFICATION_SERVICE); 
    } 
} 

Kiedy próbuję zbudować pakiet, to mówi

compile: 
    [javac] Compiling 2 source files to /home/mrburns/Desktop/myapp/bin/classes 
    [javac] /home/mrburns/Desktop/myapp/src/com/test/app/runOnBoot.java:14: cannot find symbol 
    [javac] symbol : variable NOTIFICATION_SERVICE 
    [javac] location: class runOnBoot 
    [javac]   NotificationManager nm = (NotificationManager)getSystemService(NOTIFICATION_SERVICE); 
    [javac]                       ^
    [javac] 1 error 

BUILD FAILED 

Answer 1

ten powinien być Context.NOTIFICATION_SERVICE:

NotificationManager nm = (NotificationManager)getSystemService(Context.NOTIFICATION_SERVICE); 

Answer 2

Powinieneś lepiej spróbować tego

NotificationManager nm = (NotificationManager)getSystemService(getApplicationContext().NOTIFICATION_SERVICE); 

Answer 3

znalazłem nazywając to sposób działa:

NotificationManager nm = (NotificationManager) context.getSystemService(Context.NOTIFICATION_SERVICE); 

Answer 4

NotificationManager mNotifyMgr = (NotificationManager)context.getSystemService(Context.NOTIFICATION_SERVICE);