Sending a notification from a service in Android

Question

I have a service running  and would like to send a notification  Too bad  the notification object requires a Context  like an Activity  and not a Service   Do you know any way to by pass that   I tried to create an Activity for each notification but it seems ugly  and I can t find a way to launch an Activity without any View

User · Answer

Well  I m not sure if my solution is best practice  Using the NotificationBuilder my code looks like that   private void showNotification         Intent notificationIntent   new Intent this  MainActivity class        PendingIntent contentIntent   PendingIntent getActivity                  this  0  notificationIntent  PendingIntent FLAG UPDATE CURRENT       builder setContentIntent contentIntent       NotificationManager notificationManager                NotificationManager  getSystemService Context NOTIFICATION SERVICE       notificationManager notify NOTIFICATION ID  builder build             Manifest         lt activity         android name   MainActivity          android launchMode  singleInstance       lt  activity gt    and here the Service        lt service         android name   services ProtectionService          android launchMode  singleTask  gt       lt  service gt    I don t know if there really is a singleTask at Service but this works properly at my application

User · Answer

If none of these work  try getBaseContext    instead of context or this

User · Answer

TargetApi Build VERSION CODES JELLY BEAN  public void PushNotification         NotificationManager nm    NotificationManager context getSystemService NOTIFICATION SERVICE       Notification Builder builder   new Notification Builder context       Intent notificationIntent   new Intent context  MainActivity class       PendingIntent contentIntent   PendingIntent getActivity context 0 notificationIntent 0          set     builder setContentIntent contentIntent       builder setSmallIcon R drawable cal icon       builder setContentText  Contents        builder setContentTitle  title        builder setAutoCancel true       builder setDefaults Notification DEFAULT ALL        Notification notification   builder build        nm notify  int System currentTimeMillis   notification

User · Answer

Both Activity and Service actually extend Context so you can simply use this as your Context within your Service   NotificationManager notificationManager        NotificationManager  getSystemService Service NOTIFICATION SERVICE   Notification notification   new Notification    your notification      PendingIntent pendingIntent      your intent     notification setLatestEventInfo this     your content     pendingIntent   notificationManager notify    id     notification

User · Answer

This type of Notification is deprecated as seen from documents    java lang Deprecated public Notification int icon  java lang CharSequence tickerText  long when       compiled code       public Notification android os Parcel parcel       compiled code        java lang Deprecated public void setLatestEventInfo android content Context context  java lang CharSequence contentTitle  java lang CharSequence contentText  android app PendingIntent contentIntent       compiled code        Better way You can send a notification like this      prepare intent which is triggered if the    notification is selected  Intent intent   new Intent this  NotificationReceiver class   PendingIntent pIntent   PendingIntent getActivity this  0  intent  0       build notification    the addAction re-use the same intent to keep the example short Notification n    new Notification Builder this           setContentTitle  New mail from      test gmail com            setContentText  Subject            setSmallIcon R drawable icon           setContentIntent pIntent           setAutoCancel true           addAction R drawable icon   Call   pIntent           addAction R drawable icon   More   pIntent           addAction R drawable icon   And more   pIntent  build      NotificationManager notificationManager       NotificationManager  getSystemService NOTIFICATION SERVICE    notificationManager notify 0  n      Best way Code above needs minimum API level 11  Android 3 0   If your minimum API level is lower than 11  you should you use support library s NotificationCompat class like this      So if your minimum target API level is 4   Android 1 6   use this       import android support v4 app NotificationCompat      -------------     NotificationCompat Builder builder               new NotificationCompat Builder this                       setSmallIcon R drawable mylogo                       setContentTitle  My Notification Title                        setContentText  Something interesting happened        int NOTIFICATION ID   12345       Intent targetIntent   new Intent this  MyFavoriteActivity class       PendingIntent contentIntent   PendingIntent getActivity this  0  targetIntent  PendingIntent FLAG UPDATE CURRENT       builder setContentIntent contentIntent       NotificationManager nManager    NotificationManager  getSystemService Context NOTIFICATION SERVICE       nManager notify NOTIFICATION ID  builder build

[android] Sending a notification from a service in Android

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