notification method NotificationCompat - no errors - no notification

Question

I am trying to get a simple notification. I've seen lots of examples using old API methods, but i want to use the newer method. I have put this code together from the API resource, and it runs without error. However, i am not seeing any notifications. I have the minimum required to view a notification, at least, i believe so from what i have read. Here is my code :

public class Login extends Activity {
    public static Context ctx;

public void onCreate(Bundle savedInstanceState) {
    ctx = this;
 }

private static void notice(String msgfrom, String msg) {
    NotificationCompat.Builder mBuilder =   new NotificationCompat.Builder(ctx);
    mBuilder.setSmallIcon(R.drawable.ic_launcher);
    mBuilder.setContentTitle("New message from " + msgfrom.toString());
    mBuilder.setContentText(msg);
    mBuilder.build();
}
}

THANKS TO HELP BELOW, I MODIFIED MY CODE TO THIS

NotificationCompat.Builder nb =   new NotificationCompat.Builder(ctx);
nb.setSmallIcon(R.drawable.ic_launcher);
nb.setContentTitle("New message from " + msgfrom.toString());
nb.setContentText(msg);
nb.setAutoCancel(true);

Notification notification = nb.build();
NotificationManager NM = (NotificationManager)         
ctx.getSystemService(NOTIFICATION_SERVICE);
NM.notify(0, notification);

score 2 · Accepted Answer · edited May 23 '17 at 12:23

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If you want to run Notification in All Android device <= android 4.2 then just add android-support-v4.jar file in you Project and

use below code:

NotificationCompat.Builder mBuilder =
        new NotificationCompat.Builder(this)
        .setSmallIcon(R.drawable.notification_icon)
        .setContentTitle("My notification")
        .setContentText("Hello World!");
// Creates an explicit intent for an Activity in your app
Intent resultIntent = new Intent(this, ResultActivity.class);

// The stack builder object will contain an artificial back stack for the
// started Activity.
// This ensures that navigating backward from the Activity leads out of
// your application to the Home screen.
TaskStackBuilder stackBuilder = TaskStackBuilder.create(this);
// Adds the back stack for the Intent (but not the Intent itself)
stackBuilder.addParentStack(ResultActivity.class);
// Adds the Intent that starts the Activity to the top of the stack
stackBuilder.addNextIntent(resultIntent);
PendingIntent resultPendingIntent =
        stackBuilder.getPendingIntent(
            0,
            PendingIntent.FLAG_UPDATE_CURRENT
        );
mBuilder.setContentIntent(resultPendingIntent);
NotificationManager mNotificationManager =
    (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
// mId allows you to update the notification later on.
mNotificationManager.notify(mId, mBuilder.build());

this code is work in android 2.1 to 4.2.

for more details check this and this links.

Most excellent.. Thank you... I shorted down my code for my situation, but it was your code that got me there! — iBoston, Apr 09 '13 at 13:43

score 1 · Answer 2 · answered Apr 09 '13 at 13:43

You are missing the last step. You are building your notification, and you still need to post it to the system, in the following manner :

( (NotificationManager) ctx.getSystemService ( Context.NOTIFICATION_SERVICE ) ).notify ( 100 , mBuilder.build () );

EDIT :

The integer 100 (that I chose randomly) used in the notify method is a unique identifier for the notification. You should use the same identifier if you ever need to update or cancel your notification.

NOTE :

You might have a memory leak by storing your activity's contact in a static variable ! Instead of that, you can change this :

private static void notice(String msgfrom, String msg)

to this

private static void notice(Context ctx , String msgfrom, String msg)

and hence delete the static variable.

Thanks, yea, i derived that from 'Dhaval Sodha Parmar' response. It's a learning curve... — iBoston, Apr 09 '13 at 13:54
As for you suggestion to not storing my activity in a static variable. Good suggestion - I will try that. — iBoston, Apr 09 '13 at 14:03

score 0 · Answer 3 · answered Apr 09 '13 at 12:29

Try this

Just call inside your onCreate()

    Public void Player_Notification()
    {
    final String myBlog = "http://android-er.blogspot.com/";
    notificationManager = (NotificationManager) getSystemService(Context.NOTIFICATION_SERVICE);
    myNotification = new Notification(R.drawable.ic_launcher,"Audio Track is playing in background!",System.currentTimeMillis());
    Context context = getApplicationContext();

     // here is title
    String notificationTitle = Title;
     // here is sub title
    String notificationText = data; 
    // write your activity name which you want to open when user click on notification
    Intent myIntent = new Intent(this, Activty.class);
    PendingIntent pendingIntent = PendingIntent.getActivity(Activty.this, 0, myIntent,
    Intent.FLAG_ACTIVITY_NEW_TASK);

  // intent will call your activity as you want
   myNotification.defaults |= Notification.DEFAULT_SOUND;
   myNotification.flags |= Notification.FLAG_AUTO_CANCEL;
   myNotification.setLatestEventInfo(context, notificationTitle,
   notificationText, pendingIntent);
   notificationManager.notify(MY_NOTIFICATION_ID, myNotification);

    }

this isn't using the NotificationCompat – iBoston Apr 09 '13 at 13:04 — iBoston, Apr 09 '13 at 13:04

notification method NotificationCompat - no errors - no notification

3 Answers3