I am not sure what you mean by caption, especially in the mobile context. at any case, the scrollview widget supports arbitrary content, including responsive images. The remote view concepts and responsive images concepts are quite different though, so I can't really advise you on the most appropriate usage in your scenario.
Also, notice that the dojo you have posted contains some invalid widget nesting - a header and footer are put in a scrollview page, which is outside of the scrollview itself, too.
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