This document provides an overview of the basics of Android application development. It discusses the requirements to develop Android apps including Java knowledge and development tools. It describes the Android architecture and app lifecycle. The typical structure of an Android app is explained including the main manifest file, XML layout files, Java code files and the app building process. Common Android widgets for user input and views are identified. Layout widgets like linear, relative and grid layouts are also covered. Finally, some recommended books on Android development are listed.

1. ANDROID APPLICATION
DEVELOPMENT - THE
BASICS
ALIYU ABDULLAHI

2. Requirements
1. Basic Knowledge of Java.
2. Java Development Kit (JDK ^v1.7)
3. Android Studio IDE/Eclipse IDE

3. What is Android?
Android is an Operating System.
It is built on Linux kernel which makes it an
open source platform.

4. ANDROID ARCHITECTURE

5. Android Application Parts
Main manifest file
XML file
Java file.

6. Android App Activity Life Cycle
Activity Start 
onStart()
onCreate()
onResume()
onPause()
onStop()
onDestroy()
Activity End

7. Android Application Structure
XML Main manifest Java
ADB
Dalvic VM
(Dexing)
Sign/Compress/Export

8. Android Widgets
Input widgets{
Buttons,EditText
}
View Widgets{
ScrollView,
ListView,Horizontal
scrollview
}

9. Android Layout widgets
Linearlayout*
Relativelayout*
Grid Layout
/*TabHost*/

10. Books For Android Development
Android UI Fundamentals by Jason Ostrander
Learn Java for Android Development
by Jeff Friesen