To add a new view in the list definition file which file needs to be modified:

In SharePoint list definitions, Schema.xml contains the complete list schema including views, fields, forms, and other list elements. To add a new view to a list definition, you modify the Schema.xml file. Onet.xml defines site definitions and contains references to list templates, Feature.xml defines features, and Fldtypes.xml defines custom field types - none of these directly control list views.