Btukfyl

I have this crash in production which I cannot reproduce and have no idea why it's happening.

android.app.RemoteServiceException: (Bad notification for startForeground: java.lang.RuntimeException: invalid channel for service notification: Notification(channel=null pri=0 contentView=null vibrate=null sound=null tick defaults=0x0 flags=0x4a color=0x00000000 vis=PRIVATE))

at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1771)

at android.os.Handler.dispatchMessage(Handler.java:106)

at android.os.Looper.loop(Looper.java:164)

at android.app.ActivityThread.main(ActivityThread.java:6518)

at java.lang.reflect.Method.invoke(Native Method)

at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)

at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)

That sounds to me like the channel wasn't created but I create the channel every time before I create the notification.

I'm not even sure that it's happening in this part of the code but this is the only place where I'm starting a foreground service so I assume I'm on the right track

Here's the code

String channelId = NotificationChannelConstants.MAIN_NOTIFICATION_CHANNEL_ID;

if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {

    String channelName = NotificationChannelConstants.MAIN_NOTIFICATION_CHANNEL_NAME;

    NotificationChannel chan = new NotificationChannel(channelId,

                channelName, NotificationManager.IMPORTANCE_LOW);

    chan.setLockscreenVisibility(Notification.VISIBILITY_PRIVATE);

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

    service.createNotificationChannel(chan);

}



notificationBuilder = new NotificationCompat.Builder(this, channelId)

            .setWhen(System.currentTimeMillis())

            .setSmallIcon(R.drawable.sb_unknown)

            .setContentTitle(getString(R.string.app_name))

            .setTicker(getString(R.string.app_name)).setContentIntent(broadcastIntent)

            .setContentText(mNotificationText)

            .setAutoCancel(false)

            .setOngoing(true)

            .setOnlyAlertOnce(true);



startForeground(R.id.notification, notificationBuilder.build());

You can use this for version Oreo and higher

if you use service class you can put this code

@Override

public void onCreate(){

    super.onCreate();

    if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O)

        startMyOwnForeground();

    else

        startForeground(1, new Notification());

}



private void startMyOwnForeground(){

    String NOTIFICATION_CHANNEL_ID = "com.example.simpleapp";

    String channelName = "My Background Service";

    NotificationChannel chan = new NotificationChannel(NOTIFICATION_CHANNEL_ID, channelName, NotificationManager.IMPORTANCE_NONE);

    chan.setLightColor(Color.BLUE);

    chan.setLockscreenVisibility(Notification.VISIBILITY_PRIVATE);

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

    assert manager != null;

    manager.createNotificationChannel(chan);



    NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this, NOTIFICATION_CHANNEL_ID);

    Notification notification = notificationBuilder.setOngoing(true)

            .setSmallIcon(R.drawable.icon_1)

            .setContentTitle("App is running in background")

            .setPriority(NotificationManager.IMPORTANCE_MIN)

            .setCategory(Notification.CATEGORY_SERVICE)

            .build();

    startForeground(2, notification);

} 

Of course don not forget ForeGroundService Permission your AndroidManifest.xml

<uses-permission android:name="android.permission.FOREGROUND_SERVICE" />