Android - Getting started with Android

Android Application
Development with Java

OverviewOverview

What is Android?

Why teach Android?

What do you need in order to teach Android?

Hello, Android

Basic Android graphics

Part 2: More Android!

What is Android?What is Android?

An open source Linux-based operating system intended
for mobile computing platforms

Includes a Java API for developing applications

It is not a device or product

Engaging Students with AndroidEngaging Students with Android

Android has a lot of “buzz” now
– Newness
– Coolness
– Googleness

UI and graphics made simple(r)

Advanced Java skills

What Skills Will Students Learn?What Skills Will Students Learn?

Reinforce the basics: OOP, decomposition, etc.

Separation of UI design and functionality

XML and resource files

Events and Listeners

Callback methods

Threads

Android vs. iPhoneAndroid vs. iPhone

Java vs. Objective-C

Direct install vs. Marketplace vs.
App Store

Open source?

What do you need in order
to teach Android?

What Should Students Already Know?What Should Students Already Know?

Java!
– inheritance, method overriding
– interfaces, casting
– exceptions
– debugging
– reading API documentation

Eclipse
– easy to pick up quickly, though

Do I Need Phones?Do I Need Phones?

The emulator that is part of the Android toolset for Eclipse is quite good
(though a bit slow)

You may be able to get free “developer phones” from Google

Online ResourcesOnline Resources

developer.android.com

code.google.com/p/apps-for-android/

stackoverflow.com

videos from Google I/O conferences

Creating Your First(?) Android AppCreating Your First(?) Android App
1. Set up your development environment
2. Create a new Android project in Eclipse
3. Run it in the emulator
4. Hilarity ensues

11. Set Up Your Android Environment. Set Up Your Android Environment

http://developer.android.com/sdk

Install Eclipse

Install Android SDK (Android libraries)

Install ADT plugin (Android development tools)

Create AVD (Android virtual device)

We’ve already done this for you!!

2.2. Create an Android Project in EclipseCreate an Android Project in Eclipse

File → New → Project

Select “Android Project”

Fill in Project details...

Name that appears
on device
Directory
name
Class to
automatically
create
Java package
Android
version

3. Run the Android3. Run the Android

Run → Run (or click the “Run” button)

Select “Android Application”

The emulator may take a few minutes to start, so be patient!

You don't need to restart the emulator when you have a new version of your
application

Source
code
Auto-generated
code
UI
layout
String
constants
Configuration

1 public class HelloAndroid extends Activity {
2 /** Called when the activity is first created. */
3 @Override
4 public void onCreate(Bundle savedInstanceState)
5 {
6 super.onCreate(savedInstanceState);
7 setContentView(R.layout.main);
8 }
9 }
HelloAndroid.javaHelloAndroid.java

1 <?xml version="1.0" encoding="utf-8"?>
2 <LinearLayout
3 xmlns:android="http://schemas.android.com/apk/res/android"
4 android:orientation="vertical"
5 android:layout_width="fill_parent"
6 android:layout_height="fill_parent"
7 >
8 <TextView
9 android:layout_width="fill_parent"
10 android:layout_height="wrap_content"
11 android:text="@string/hello "
12 />
13 </LinearLayout>
main.xmlmain.xml

2 <resources>
3 <string name="hello">Hello World, HelloAndroid!
4 </string>
5 <string name="app_name">Hello, Android</string>
6 </resources>
strings.xmlstrings.xml

2 <manifest
3 xmlns:android="http://schemas.android.com/apk/res/android"
4 package="edu.upenn.cis542"
5 android:versionCode="1"
6 android:versionName="1.0">
7 <application android:icon="@drawable/icon"
8 android:label="@string/app_name">
9 <activity android:name=".HelloAndroid"
10 android:label="@string/app_name">
11 <intent-filter>
12 <action
13 android:name="android.intent.action.MAIN" />
14 <category
15 android:name="android.intent.category.LAUNCHER"/>
16 </intent-filter>
17 </activity>
18 </application>
19 </manifest>
AndroidManifest.xmlAndroidManifest.xml

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Android - Getting started with Android

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