Mobile Application Development Question:

Android application architecture allows the simplification and reuse of any application. It provides a better way to publish the capabilities of the application so that any other application can make good use of those capabilities.
This architecture includes the following components:
☆ Intent to perform some operation on some activity and service
☆ Resource Externalization - such as strings and graphics
☆ Notification signaling users - light, sound, icon etc.
☆ Content Providers - sharing of data between various applications