Application Framework
Developers have full access to the same framework APIs used by the core
applications. The application architecture is designed to simplify the reuse
of components; any application can publish its capabilities and any other
application may then make use of those capabilities (subject to security
constraints enforced by the framework). This same mechanism allows components
to be replaced by the user.
Underlying all applications is a set of services and systems, including:
- A rich and extensible set of Views that can be used to
build an application, including lists, grids, text boxes, buttons, and even
an embeddable web browser
- Content
Providers that enable applications to access data from other
applications (such as Contacts), or to share their own data
- A Resource
Manager, providing access to non-code resources such as localized
strings, graphics, and layout files
- A Notification Manager that enables
all applications to display custom alerts in the status bar
- An Activity Manager that manages the
lifecycle of applications and provides a common navigation backstack
For more details and a walkthrough of an application, see the Notepad Tutorial.
