Add local background image to Habpanel on Android App

Hello everyone,

I would like to use a JPG lying locally on the Raspberry Pi as background image in the habpandel. For this purpose I have saved the image under etc/openhab2/html and called it up via “http://myPiaddress:8080/static/image.jpg”. On my pc it works very well. But with the Android App it does not work. If I call the link manually via browser on my smartphone, the picture is loaded. If I use an external URL on Habpanel, it also works. Only the locally saved image cannot be loaded. Does anyone have an idea?

Best regards
Tacitus