Android Study Guide
Lesson 2 Introduction to Android
2.1 Activities
Lesson 2 Section 1 Subsection 1
2.2 Fragments
Lesson 2 Section 2 Subsection 1 (2 Overall)
Lesson 2 Section 2 Subsection 2 (3 Overall)
2.3 Intents
Lesson 2 Section 3 Subsection 1 (4 Overall)
Lesson 2 Section 3 Subsection 2 (5 Overall)
2.4 Interview Questions
1. What is an Activity in Android?
User interfaces on Android are managed by extensions of the Activity class. As only one Activity can be displayed at a given time, Activities are often thought to represent individual "screens" visible to the user. As with all other Android components, the Activity class provides a number of lifecycle callbacks to notify of the current state.