I made a spreadsheet in Google Docs and used data validation to restrict a range of cells to a list of valid values. When I look at the spreadsheet using a browser, the valid list is correctly shown in the dropdown menu. However, when I look at the spreadsheet in my Android phone, I don't see the list (there is a little [1] shown in the cell, but I don't see how to click this.)
Is there any way to make this list display on a phone?
Using the Google Drive App I created a test spreadsheet to investigate your question. I found the [1] to be a footnote - at the bottom of the spreadsheet is a list of all notes about validation for each applicable cell. The same applies to comments made to cells and, I suspect, other types of advanced cell formatting that don't translate well to small screens. It's clunky, but at least the validation follows to mobile. There doesn't seem to be a way to change how validation information is displayed.
See here below the spreadsheet are two footnotes, one indicating valid data (by displaying the help text, [1]) and the other representing invalid data (by displaying "validationFailed[Help Text]," [2]):
