Exception: android.app.RemoteServiceException: Bad notification posted from package : Couldn’t create icon: StatusBarIcon

#Android

Fix

Use alpha only icon.

What are alpha only icons?

Alpha only icons are transparent icons, where white acts as the visible area and black acts as the transparent area. For example, all material icons are alpha only.

Reason

Since android L onwards :

The system ignores all non-alpha channels in action icons and the main notification icon. You should assume that these icons are alpha-only.

So this exception occurs when colored image resource is used as a notification icon.

Why can’t use colored image resource ?

Device status bar backgrounds color could be of any color. There are tons of manufactures and people apply themes etc.

So Android framework only allows alpha only icons as they will be visible on any colored status bar.

 NotificationCompat.Builder(context, channelId)
 .setSmallIcon(R.drawable.ic_alpha_icon_for_notifications) //alpha only icon
 .setColor(ContextCompat.getColor(applicationContext, R.color.green)) 
 // adds your brand color over alpha icon