Hands-On Android UI Development

Android application structure

An Android application is very different in its internal structure when compared to applications on other platforms, in even the simplest details. Most platforms see their applications as monolithic systems with a fixed entry point. When the entry point returns or exits, the platform assumes that the application has finished running. On Android, an application may have several different entry points for the user, and others for the system. Each entry point has a different type, and different ways for the system to reach it (called intent filters). The most important part of an application from the user perspective is its activities. These (as the name suggests) are supposed to represent an action that the user ...