In Salesforce1, there is cancel and save buttons available for object-specific action when source is visualforce. When I click on Save, nothing happens. I have custom logic on the save button. So can I override the save button so that I can hide my own custom save button and use the standard save and cancel buttons.
Yes, you can override the Save/Submit button from an action when using Visualforce as a source. Maybe this post will help to clarify how to accomplish this override to implement your logic: