Notification icon displaying as white color in Android-O/26

I have used following code to display the notification .
But it is working in all Android versions other than Android 26.



Following is my Code :

NotificationCompat.Builder getBaseNotificationBuilder() {

  NotificationCompat.Builder builder = new NotificationCompat.Builder(getContext(), NotificationConstants.NOTIFICATION_CHANNEL);
  builder.setContentTitle(getContext().getString(R.string.title));
  builder.setSmallIcon(R.drawable.icon);
  builder.setOnlyAlertOnce(true);
  return builder;

} 

My Solution to Fix this :

To fix this i have tried many possible solutions but none of them are working.

But strangely , tried following solution and it works perfectly.

I have moved all my notification icons from res/drawable folder to res/drawable-xxhdpi folder.

Then issue is resolved.