Set Drawable or Bitmap as icon In Notification in Android

Question

I download a image from server as bitmap and convert it to drawable now i want to use this drawable as notification icon. But i am unable to do that. here is my code:

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Answer 1

There is some points about this question, mainly related with API 23+, if you are only interested in setSmallIcon, go to the 2nd and 3rd topics.

1st :

You can set the LargeIcon from a Drawable (instead of Resource id), like the following

Drawable drawable= ContextCompat.getDrawable(this,R.drawable.your_drawable);

            Bitmap bitmap = ((BitmapDrawable)drawable).getBitmap();

            NotificationCompat.Builder mBuilder =
                    new NotificationCompat.Builder(context)
                            .setLargeIcon(bitmap)
                            .setContentTitle("hahah")
                            .setContentText("Tap to stop")
                            .setOngoing(true);

2nd :

If you need to set a small icon in API below 23, you will need to set a resource id like R.drawable.your_resource. The NotificationCompat.Builder does not allow you to use Drawables or Bitmaps in setSmallIcon().

3rd :

fortunately , the support has been expanded to Icon type on setSmallIcon() in version 23+, using the Notification.Builder, like following :

 Drawable drawable = ContextCompat.getDrawable(this,R.drawable.your_drawable);

            Bitmap bitmap = ((BitmapDrawable)drawable).getBitmap();

            Notification.Builder mBuilder =
                    new Notification.Builder(context)
                            .setSmallIcon(Icon.createWithBitmap(bitmap))
                            .setLargeIcon(bitmap)
                            .setContentTitle("hahah")
                            .setContentText("Tap to stop")
                            .setOngoing(true);