1. Introduction to Android Programming

2. Contents Basic Concepts Environment Setup
Creating and Building Android App

3. Android Android apps are written in Java
The Android OS is a multi-user Linux system
Android app lives in its own security sandbox
System assigns each app a unique Linux user ID
Each process has its own virtual machine
Every application runs in its own Linux process

4. Application Components
Android Application
.apk : Android package
Four Application Components
Activity
Service
Content Provider
Broadcast Receiver
Communication among components except Content Provider
Intent
extension

5. Activity
Activity Lifecycle
Implement Lifecycle Callbacks

6. Activity Start an Activity Start an Activity for a Result
Caller Activity
Callee Activity

7. Activities and Stack

8. Services
A service is a component that runs in the background to perform long-running operations
A service does not provide a user interface
Activity can start the service and let it run or bind to it in order to interact with it
e.g., a service might play music in the background while the
user is in a different app

9. Broadcast Receivers
A broadcast receiver is a component that responds to system-wide broadcast announcements
Apps can also initiate broadcasts
Although broadcast receivers don't display a UI, they may create a status bar notification to alert the user when a broadcast event occurs

10. Content Providers A content provider manages a shared set of app data
Through the content provider, other apps can query or even modify the data
Any app with the proper permissions can query part of the content provider

11. Intent
An intent is an abstract description of an operation to be performed
startActivity
sendBroadcast
startService (bindService) …

12. Environment Setup
Step 1: Install JDK

13. JDK Installation
Can download the JDK for your OS at
Alternatively,
OS X:
Open "Terminal”
Type javac at command line
Install Java when prompt appears
Linux:
Type sudo apt–get install default–jdk at command line (Debian, Ubuntu)
Other distributions: consult the documentation
JDK and JRE are different!

14. Environment Setup
Step 2: Configure the Android SDK

15. SDK Configuration
Download Android SDK from Or
Simplest: Download and install Android Studio bundle
(including Android SDK)
Software development kit

16. Eclipse IDE- Official IDE for Android development
Integrated development environment
Eclipse IDE- Official IDE for Android development
Apache Ant for building projects

17. Android focused IDE, designed specifically for Android development.
Contains all SDK tools for develop, debug, or test.

18. Android Studio Android Development Environment based on IntelliJ IDEA
Software development kit

19. Android Studio Android uses Gradle
Gradle is an open source build system that combines the power of Ant and Maven
Software development kit

21. Android Studio
Software development kit

22. Run Android SDK Manager
Recommended: Install Android 2.2, APIs and 4.x API
Do not worry about Intel x86 Atom, MIPS system images
Settings

23. Now you are ready for
Android development!

25. Create New Android Project

27. Create Activity

30. The Manifest File
Identify any user permissions the application requires
Declare the minimum API level required by the application
Declare hardware and software features used or required
by the application
API libraries the application needs to be linked

31. The Manifest File

32. The Manifest File
Do not forget to declare Components in the Manifest

33. Permission
Add following permissions to the Manifest file

34. Sample Code

35. UI – Declaring Layout
Initiated when called setContentView() on onCreate()
Use Visual Layout Editor for initial layout design
Edit XML file extensively

36. Editing Sample Code “@+id/helloId” Add id to main.xml
Edit HelloWorldActivity.java

37. A Sample Code Important points UI Element has an Id
Variables in our code link to UI elements
Update UI
element content from the program 1 2
Hello world! 3

38. UI – Handling UI Events
onClick, onLongClick, onKey, onTouch, …

39. Sample Implementation
MainActivity
Option menu
Context menu
Capture
Play click
CaptureActivity
Upload Service
Capture Button Click
PlayerActivity
Background Upload

40. Building Process
Running

41. Running Sample App

42. App Failure

43. Debugging, look at DDMS !!!
“Dalvik Debug Monitor Service”

44. Enabling USB Debugging

45. Thank You! Any questions
*These slides are based on the slides from