Android Tsm

twincling.org

Mobile Application Development

August 8th, 2009 Hyderabad, India

twincling.org

We appreciate

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Outline ●

Hello Android World

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Android Architecture

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Android SDK Overview

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UI Development

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3D with OpenGL

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What is Android? An Open Platform for Mobile Development ●

A hardware reference design for mobiles

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A Linux operating system kernel

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Open source libraries

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A run time environment

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An application framework and UI framework

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Some pre-installed applications and

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Software Development Kit

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Android SDK ●

No licensing, distribution, or development fees

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Hardware access like network, Camera, accelerometer

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GSM, EDGE, and 3G networks

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GPS with location-based services

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Full multimedia hardware control including playback and recording using the camera and microphone

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Accelerometer and compass hardware

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IPC message passing

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Shared data stores

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An integrated open source WebKit-based browser

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Applications that integrate Map controls as part of their user interface

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Peer-to-peer (P2P) support using Google Talk

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Mobile-optimized hardware-accelerated graphics, both 2D and 3D

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Optimized memory and process management

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Software Stack

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Android Application ●

Activity Manager

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Views

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Notification Manager

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Content Providers

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Resource Manager

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Android Libraries ●

android.util – string formatters, XML

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android.os – message passing, IPC, clock, debugging

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android.graphics – canvas, colors, primitives

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android.text – display, parse text

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android.database – cursors, database

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android.content – data access, content providers

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android.view – user interface

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android.widget – buttons, text boxes, list boxes etc

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com.google.android.maps – Google Maps

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android.app – Application, Activity and Services

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android.provider – standard content provider like Contacts

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android.telephony – phone stack

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android.webkit – Web-based content

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Android Advanced Libraries ●

android.location – Location access

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android.media – Audio and Video

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android.opengl – OpenGL ES API for 3D

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android.hardware – Camera, Accelerometer, Compass

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android.bluetooth - Bluetooth

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android.net.wifi - WiFi

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SDK includes.. ●

Android APIs

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Android project development tools

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Android executable(.dex) and packaging(.apk) tools

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Android Emulator

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Dalvik Debug Monitoring Service (DDMS)

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Documentation and Sample Code

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SDK Setup ●

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http://code.google.com/android/download.html Android pluging available for Eclipse, Netbeans and IntelliJ with JDK 5 or later Android Development Toolkit (ADT) plugin https://dl-ssl.google.com/android/eclipse/

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Types of Android apps ●

Foreground Activity

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Background Service

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Intermittent Activity

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Component of an application ●

Activities

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Services

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Content Providers

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Intents

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Broadcast Receivers

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Notifications

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Process States and Priority

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Activity Stack

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Activity States ●

Active

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Paused

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Stopped

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Inactive

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State Changes

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In code. package org.twincling.hello; import android.app.Activity; import android.os.Bundle; public class HelloWorld extends Activity { /** Called when the activity is first created. */ // Called at the start of the full lifetime. @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); // Initialize activity. setContentView(R.layout.main); } // Called after onCreate has finished, use to restore UI state @Override public void onRestoreInstanceState(Bundle savedInstanceState) { super.onRestoreInstanceState(savedInstanceState); // Restore UI state from the savedInstanceState. // This bundle has also been passed to onCreate. }

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//Called before subsequent visible lifetimes //for an activity process. @Override public void onRestart(){ super.onRestart(); //Load changes knowing that the activity has already //been visible within this process. } //Called at the start of the visible lifetime. @Override public void onStart(){ super.onStart(); //Apply any required UI change now that the Activity is visible. } //Called at the start of the active lifetime. @Override public void onResume(){ super.onResume(); //Resume any paused UI updates, threads, or processes required //by the activity but suspended when it was inactive. } //Called to save UI state changes at the //end of the active lifecycle. @Override

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//Called to save UI state changes at the //end of the active lifecycle. @Override public void onSaveInstanceState(Bundle savedInstanceState) { //Save UI state changes to the savedInstanceState. // This bundle will be passed to onCreate if the process is // killed and restarted. super.onSaveInstanceState(savedInstanceState); } // Called at the end of the active lifetime. @Override public void onPause(){ // Suspend UI updates, threads, or CPU intensive processes // that don’t need to be updated when the Activity isn’t // the active foreground activity. super.onPause(); }

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// Called at the end of the visible lifetime. @Override public void onStop(){ // Suspend remaining UI updates, threads, or processing // that aren’t required when the Activity isn’t visible. // Persist all edits or state changes // as after this call the process is likely to be killed. super.onStop(); } // Called at the end of the full lifetime. @Override public void onDestroy(){ // Clean up any resources including ending threads, // closing database connections etc. super.onDestroy(); } }

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Summary / Take home ●

Android overview

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Get started on mobile app development

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Resources ●

Android http://developer.android.com/

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Books

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Special thanks

AppLabs Pvt. Ltd. http://www.applabs.com/

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freedom of innovation

[email protected] 5,000+ members TSM (2nd Sat) BoF Hackathon Workshops 95+ college sessions and workshops Industry – Student interaction 7-member board of directors

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Hyderabad, A. P. India

Largest independent society in A.P.