A Drawable resource providing an extended graphical logo for its associated item. Use with the application tag (to supply a default logo for all application components), or with the activity, receiver, service, or instrumentation tag (to supply a specific logo for that component). It may also be used with the intent-filter tag to supply a logo to show to the user when an activity is being selected based on a particular Intent.

The given logo will be used to display to the user a graphical representation of its associated component; for example as the header in the Action Bar. The primary differences between an icon and a logo are that logos are often wider and more detailed, and are used without an accompanying text caption. This must be a reference to a Drawable resource containing the image definition.

Must be a reference to another resource, in the form "@[+][package:]type:name" or to a theme attribute in the form "?[package:][type:]name".

[Android Documentation]