So i followed the guide from Pepper robot portal. That i must add
Domain: com.aldebaran.system.tablet
Key: MainActivity
Value: image (default: opengl for th
you need to place your image in a folder with the name html.
So in your application "app-uuid", create a folder html. Place your image in and write your pref like behind :
Domain: com.aldebaran.system.tablet
Key: MainResourceURL
Value: http://198.18.0.1/apps/app-uuid/image.jpg
Hint : test on a browser to display your image with ip-robot/apps/app-uuid/image.png . If it works so your url path is good.