Foss con2011

Android DevelopmentIntroduction to

Vanji! [email protected]

Introduction to Android

Identify unique features of android platform

Compare android against other platforms

Understand android building blocks

After this section you will...

WE’RE COVERING

TOOLS NEEDED (~5 MINS)

ANDROID FRAMEWORK INTRO (~5-8 MINS)

BUILDING A REAL APP (MAJORITY OF TIME)

QUESTIONS

FYI: THIS IS A LOT OF INFO! WE’RE GOING TO MOVE VERY FAST!

What is Android ?

android is the first complete, open and free mobile platform

software stack than includes•operating system•Middleware•key applications•rich set of APIs

Is android linux ?

android is based on a linux kernel but it's not GNU/Linux

so is android java ?

● uses the java language● implements part of the Java5 SE specification● runs on a dalvik virtual machine instead of JVM android is not an implementation of any of the Java variants

Android linux kernel

Android is based on a linux 2.6 kernel, providing•Security•Memory management•Process management•Network stack•Driver model•abstraction layer

THE APP

Emulator!

What You’ll Need

ARCHITECTURE

APPLICATION BUILDING BLOCKS

• UI Component Typically Corresponding to one screen.

Activity

• Responds to notifications or status changes. Can wake up your process.

IntentReceiver

• Faceless task that runs in the background.

Service

• Enable applications to share data.ContentProvider

APPLICATION REPLACING& REUSING

Client component makes a request for a specific action.

System picks the best component for that action.

Components can be replaced at any time.

INTENTS: APPLICATION REPLACING& REUSING

WRITING THE APP