Android development beginners faq

Android Dev 101 Dis 20, 2011Khirulnizam Abd Rahman fb.com/khirulnizam blog.kerul.net

Agenda DAY 1  Android Apps Development Beginner’s FAQs  The IDE, Android SDK, Emulator and Project structure  Widget Interaction - Textbox and Button  HTML and WebView DAY 2 12/19/2011 http://blog.kerul.net 2

Android Phones12/19/2011 http://blog.kerul.net 3

Android Story http://www.techsavys.info/2011/07/the- android-story-an-android-infographic- discussing-about-its-beginning-on- going-changes-and-worldwide-market- shares.html12/19/2011 http://blog.kerul.net 4

Faq1: What is Android?  Android is a software stack for mobile devices that includes an operating system, middleware and key applications (platform). The Android SDK provides the tools and APIs necessary to begin developing applications on the Android platform using the Java programming language.  The kernel of most Android version is based on Linux 2.6 (3.0 for ICS).  Android architecture;12/19/2011 http://blog.kerul.net 5

Android Architecture12/19/2011 http://blog.kerul.net 6

Faq2: Who developAndroid?  Initially developed by Andrew (Andy) Rubin and his team in Android Inc.  Google acquired Android Inc. in 2005.  Now, it is developed by Google under Andy Rubin (Senior Vice President of Mobile)12/19/2011 http://blog.kerul.net 7

Faq3: How many versions(distributions) Android has?12/19/2011 http://blog.kerul.net 8

 Source: http://developer.android.com/resources/dashb oard/platform-versions.html12/19/2011 http://blog.kerul.net 9

Faq4: What is API Level?  API Level is an integer value that uniquely identifies the framework API revision offered by a version of the Android platform.  The Android platform provides a framework API that applications can use to interact with the underlying Android system.12/19/2011 http://blog.kerul.net 10

Faq5: What is Androidapp?  Developer can develop application that runs on top of Android.  App is actually a simpler version of application.  Uses *.apk for the installer file extension.12/19/2011 http://blog.kerul.net 11

App samples12/19/2011 http://blog.kerul.net 12

Faq6: What is the languageused to develop Androidapp?  Java  compiled into Dalvik Bytecode (NOTJava bytecode).  Android provides Dalvik virtual machine- DVM inside Android (NOT Java virtual machine-JVM)  Using Android API – (with some Java APIs).12/19/2011 http://blog.kerul.net 13

Faq7: What is Dalvik VirtualMachine, is it similar as JVM?  Author - Dan Bornstein  Dalvik VM implementing slightly different architecture to JVM.  Dalvik VM is a register-based architecture.  Being optimized for low memory and slower processing speed.  The VM was slimmed down to use less space.12/19/2011 http://blog.kerul.net 14

Faq8: What are tools neededto develop Android App?  Latest JDK – version 6 - http://www.oracle.com/technetwork/java/javase/downl oads/jdk-6u27-download-440405.html (not yet tested against JDK 7)  Eclipse (as the IDE) - http://www.eclipse.org/downloads/packages/eclipse- ide-java-developers/indigor  Android Development Toolkit (ADT 12) for Eclipse - http://developer.android.com/sdk/eclipse-adt.html  Android SDK - http://developer.android.com/sdk/  Installation guide - http://blog.kerul.net/2011/06/eclipse- helios-android-development.html  Third parties: Titanium, PhoneGap, Unity3D12/19/2011 http://blog.kerul.net 15

IDE12/19/2011 http://blog.kerul.net 16

Dalvik Debugger12/19/2011 http://blog.kerul.net 17

Faq8: Where to distribute myApp?  market.android.com  MobileApps.com  GetJar.com12/19/2011 http://blog.kerul.net 18

12/19/2011 http://blog.kerul.net 19

Android Project Structure Inside Android Project, there should be; /src – the Java codes are here /gen – generated automatically /assets – put your fonts, videos, sounds here /res – images, layout and global variables /drawable-hdpi –for high spec phones /drawable-ldpi –for low spec phones /drawable-mdpi –for medium spec phones /layout – all XML file for the screen(s) layout /values – global constant variables12/19/2011 http://blog.kerul.net 21

AndroidManifest AndroidManifest.xml – app’s permissions need to be registered here – (eg: app can access Internet, phone contacts, camera, etc must be mentioned here)12/19/2011 http://blog.kerul.net 23

<?xml version="1.0" encoding="utf-8"?> <manifest xmlns:android="http://schemas.android.com/apk/res/android" android:versionCode="7" android:versionName="1.7" package="net.kerul.mMathurat"> <application android:icon="@drawable/icon" android:label="@string/app_name" android:taskAffinity=".mMathuratActivity"> <activity android:name=".mMathuratActivity" android:label="@string/app_name" android:screenOrientation="portrait"> <intent-filter> <action android:name="android.intent.action.MAIN" /> <category android:name="android.intent.category.LAUNCHER" /> </intent-filter> </activity> <activity android:name=".Aboutus" class=".Aboutus" android:label="Mengenai kami..." android:screenOrientation="portrait"> </activity> <activity android:name=".Berterusan" class=".Berterusan" android:label="Mod pemanduan..." android:screenOrientation="portrait"> </activity> </application> <uses-sdk android:minSdkVersion="7" /> <receiver android:name=".DetectIncomingCall"> <intent-filter> <action android:name="android.intent.action.PHONE_STATE" /> </intent-filter> </receiver> <uses-permission android:name="android.permission.READ_PHONE_STATE" /> <uses-permission android:name="android.permission.INTERNET" /> <uses-permission android:name="android.permission.VIBRATE"></uses-permission> </manifest>12/19/2011 http://blog.kerul.net 24

DEMO Demo 0: The IDE (Eclipse + ADT) Demo 1: Creating a new Android Project (and the project structure). Demo 2: Widgets and interaction – Textbox and Button. Demo 3: HTML and WebView Demo 4: APK and Distribution12/19/2011 http://blog.kerul.net 25

TQvm Q&A12/19/2011 http://blog.kerul.net 26

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Android development beginners faq

by Khirulnizam Abd Rahman on Sep 17, 2011

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