It would be great to add some markup to the config.xml file so that you could specify different loading screens images to use for different form factors or Landscape/Portrait
For instance explicitly calling out the screen resolution images as part of the attributes.
<rim:loadingScreen backgroundImage="foo.png" foregroundImage="bar.png"
backgroundImage640x320="foo640x320.png" foregroundImage640x320="bar.640x320.png" />
This would allow for all different scenarios and form factors. If the screen resolution is not explicitly set then it would default back to the backgroundImage and foregroundImage attributes
Some details from the forums
Great idea! Too bad this idea has been around for almost a year now without anyone picking it up..
Actually, this is supported now in the BlackBerry 10 WebWorks SDK: https://developer.blackberry.com/html5/documentation/rim_splash_element.html
Recommend closing this request.
@astanley We're not only writing apps for BlackBerry 10 and it would be great if this was also supported for WebWorks apps that are targeted for BlackBerry OS <= 7