Project Tool Window | context menu of a package with the application classes | New - Android Component
In this dialog box, specify the class that implements the new Android component, the component type, and the title to be displayed to the user.
In this text box, type the name of the class that implements the component.
In this drop-down list, specify the component type. The available options are:
Activity: implements a window where you place your UI to interact with the user.
Fragment: represents a behavior or a part of user interface in an activity.
Application: an Android package, i.e. an .apk archive that
contains the contents of an Android app and the installer.
Service: represents an application's
desire either to perform an operation without interacting with the user, or to supply functionality for other applications.
enables the reception of intents
from the system or another application without running other components of this application.
Remote Interface: an Android Interface Definition
Language (AIDL) interface used for interprocess communication.
In this text box, type the title that will be displayed to the user.
Mark as startup Activity
Select this check box to have the new component of the Activity type displayed by default when the application starts.
Create layout file
Select this check box to have IntelliJ IDEA generate a stub of the related layout definition file, that is, the content view of the new activity or fragment.
In the Create Layout dialog box that opens, specify the layout name, its root element,
and the folder where the layout definition will be stored relative to the res folder.
If your application does not need to be compatible with various Android devices and, therefore, no multiple screens
support is required, accept the default layout subfolder.
To provide alternative resources,
specify the resource qualifiers that determine
a specific device configuration. Move the relevant qualifiers from the Available qualifiers list to the Chosen qualifiers list
and specify their values. IntelliJ IDEA appends all the selected qualifiers to the Directory name field with a dash character as separator.