Android

Info mostly based on Pro Android 3

User Applications Java Libraries – most of Java standard edition

◦ Activities/Services◦ UI/Graphics/View – modern UI, not Swing◦ Resources/Content Providers◦ Telephone/Camera◦ Multi-Media◦ SQLite Database◦ Http/Connectivity◦ Java SE/Java Apache

Dalvik VM – Virtual machine (optimized JVM) Core C libraries Linux

Where is Dalvik?

Processor Emulator Mimics most device features (headphones,

bluetooth, battery, etc.)

C-based framework

C++ Microsoft Foundation Classes

Java-based Swing Design flexibility, portability

Android UI, JavaFX, Microsoft Silverlight, Mozilla XML User Interface Language (XUL)

UI is declarative and independently themed

http://androidstutorial.blogspot.com/2012/08/lifecycle-of-android-activity.html

Lifecycle is managed by the system•Limited resources•System determines priority, may shut down to free resourcesCallbacks to handle state changes•onCreate, onStart, onRestart, onResume, onPause, onStop, onDestroy•App doesn’t need to respond to all of these•Mostly handle onCreate, onResume, onPause•Be sure to call superclass versions for any method you write

View. UI elements. Activity. UI concept. Usually a single

screen. May contain one or more views. An app may contain several activities. Example: view data, create data, edit data.

Intent. Intention to do some work. May: broadcast a message, start a service, launch an app, etc.

Content Provider. Work with data. Service. Background processes that can

run for along time. May be local or remote.

LogCat Log.v(TAG, “Message”); Can’t use with MyLyn (remove plugin)

Install Eclipse for Mobile Developers (or use existing Eclipse)

Remove the MyLyn files so LogCat will work Install the ADT plugin from: https://dl-ssl.google.com/android/eclipse/ Update the ADT tools (Window->ADT

manager, see next slide)

Manage your list of devices

Click the AVD Manager button

Click New to add a new one (this list is initially blank)

Create a Device

Add Keyboard support

Specify memory

Pick target

Click on your device

Press Start (will also start if you run a program)Don’t close between runs!

Launch the Emulator

Launch the Emulator, second screen

Use the Android Project wizard

Mostly accept prompts Do tutorials