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Building an Android client

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rohitnayak

The document discusses building an Android client, highlighting the differences between Android and iPhone app development, as well as core Android concepts and architecture. It covers technical details about the Android platform, including its application framework, components, and development tools. Additionally, it provides a demo app example, 'Poolster,' detailing its structure, functionalities, and how to deploy it.

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Building an Android client Rohit Nayak Talentica Software
Agenda iPhone and the Mobile App Explosion How mobile apps differ Android philosophy Development Platform Core Android Concepts App Demo App Dissection
The iPhone Phenomenon
http://en.wikipedia.org/wiki/File:IPhone_sales_per_quarter.svg
http://www.techcrunch.com/2009/10/21/how-the-iphone-is-blowing-everyone-else-away-in-charts/
Mobile Limitations Screen size Battery Limitations CPU tick, memory refresh, screen lighting Speed Memory Keyboard
Usage Traits Universal, Always Available Small attention span Interruptible (calls, green light!) GPS Tap, Flick, Rotate, Pinch, Shake Accelerometer Voice, Texting Handwriting recognition Dropped calls, lack of coverage
Motorola Droid
Motorola Droid Android 2.0, 256MB 4.56-by-2.36-inch, 0.54 inch thick, 6oz, 480-by-854-pixel, 6hrs Camera: 5MP/4X flash, video rec Slide-out QWERTY keyboard Mail: Gmail, MS Exchange Google Maps Navigation
The Android mobile platform Linux 2.6 kernel Dalvik VM (.dex, .apk) Application framework SQLite, Integrated browser (Webkit) OpenGL graphics Media support GSM/CDMA, Wireless Camera, GPS, Accelerometer
Core Applications Email client SMS Calendar Maps Contacts
Criticisms / Issues Not a std linux distribution Not Java ME/SE, limited libraries Apps run only from on-board memory Version compatibility Obsolete search results
Android Stack
Demo Android Contacts App
Application Framework Activity Manager: app life cycle, navigation stack Views: layout, widgets Content Providers: data storage/sharing Resource Manager: strings, images Notification Manager: alert mechanisms
Key Building Blocks Activities Services Intents Receivers Content Providers
Intents Describes operation to be performed Action / Data pair ACTION_VIEW content://contacts/people ACTION_DIAL content://contacts/people/4 ACTION_DIAL tel:9822012345 Category (LAUNCHER, HOME, PREFERENCE) Type (data mime type) Extras (hashmap for custom data)
Activities Application consists of activities Interacts with user Associated with views Requests data or services via Intents Calls other activities Services Background process MP3 player, polling sub-system
Receivers Broadcast receivers (low battery, call, sms) Intent Receivers Intents registered with Android Content Providers Share data with activities / services Queries in the form of a URI content://contacts/people
 
Installing Dev Environment Java 5/6 Eclipse Android SDK $PATH ADT plugin Install Updates
ADT Plugin Emulator, Device Controls Android Virtual Device Manager Dalvik Debug Monitor Service Debugger, LogCat File Explorer, Threads, Heap Physical Device Testing
Demo App Preview
Poolster Online “football pools” application Entities: Game, User Game  Stake, Option, Ends To join User chooses an Option REST Webservice backend Clients: iPhone, Grails, Android, Silverlight
Inside Poolster Directory Structure Manifest File App Launching Layout Files Menu
Directory Structure /src /res /drawable (-ldpi, -hdpi) /layout (-small, -large, -land) /menu /raw /values /bin .class, .dex, .apk /gen R.java - constants
AndroidManifest.xml <?xml version=&quot;1.0&quot; encoding=&quot;utf-8&quot;?> <manifest xmlns:android=&quot;http://schemas.android.com/apk/res/android&quot; package=&quot;com.talentica.poolster&quot; android:versionCode=&quot;1&quot; android:versionName=&quot;1.0&quot;> <uses-permission android:name=&quot;android.permission.INTERNET&quot;></uses-permission> <application android:icon=&quot;@drawable/icon&quot; android:label=&quot;@string/app_name&quot;> <activity android:name=&quot;.Main&quot; android:label=&quot;@string/app_name&quot;> <intent-filter> <action android:name=&quot;android.intent.action.MAIN&quot; /> <category android:name=&quot;android.intent.category.LAUNCHER&quot; /> </intent-filter> </activity> <activity android:name=&quot;.GamesList&quot; android:label=&quot;@string/app_name&quot;> </activity> <activity android:name=&quot;.Login&quot; android:label=&quot;@string/app_name&quot;> </activity> </application> <uses-sdk android:minSdkVersion=&quot;3&quot; /> </manifest>
The Main activity Intent Action = android.intent.action.MAIN Category = android.intent.category.LAUNCHER Set layout Initialise views Set title, menu Launching another activity
Layouts Absolute, Relative, Linear, Table Dips vs pixels Screen size/density Landscape Widgets: TextView , ListView, ImageView, EditText, RadioGroup, Gallery, Button
Inside Poolster - 2 REST Client Xstream Internationalization Location, Maps Database Contacts AdMobs Integration
Deploying Join Android Developer Program Eclipse Android Tool “Export Signed Package” Upload .apk file to Android Market
Resources http://developer.android.com Professional Android Application Development (Wrox) Android Application Development (O’Riley) http://www.screaming-penguin.com/AndroidResources
Thanks

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Building an Android client

  • 1. Building an Android client Rohit Nayak Talentica Software
  • 2. Agenda iPhone and the Mobile App Explosion How mobile apps differ Android philosophy Development Platform Core Android Concepts App Demo App Dissection
  • 6. Mobile Limitations Screen size Battery Limitations CPU tick, memory refresh, screen lighting Speed Memory Keyboard
  • 7. Usage Traits Universal, Always Available Small attention span Interruptible (calls, green light!) GPS Tap, Flick, Rotate, Pinch, Shake Accelerometer Voice, Texting Handwriting recognition Dropped calls, lack of coverage
  • 9. Motorola Droid Android 2.0, 256MB 4.56-by-2.36-inch, 0.54 inch thick, 6oz, 480-by-854-pixel, 6hrs Camera: 5MP/4X flash, video rec Slide-out QWERTY keyboard Mail: Gmail, MS Exchange Google Maps Navigation
  • 10. The Android mobile platform Linux 2.6 kernel Dalvik VM (.dex, .apk) Application framework SQLite, Integrated browser (Webkit) OpenGL graphics Media support GSM/CDMA, Wireless Camera, GPS, Accelerometer
  • 11. Core Applications Email client SMS Calendar Maps Contacts
  • 12. Criticisms / Issues Not a std linux distribution Not Java ME/SE, limited libraries Apps run only from on-board memory Version compatibility Obsolete search results
  • 15. Application Framework Activity Manager: app life cycle, navigation stack Views: layout, widgets Content Providers: data storage/sharing Resource Manager: strings, images Notification Manager: alert mechanisms
  • 16. Key Building Blocks Activities Services Intents Receivers Content Providers
  • 17. Intents Describes operation to be performed Action / Data pair ACTION_VIEW content://contacts/people ACTION_DIAL content://contacts/people/4 ACTION_DIAL tel:9822012345 Category (LAUNCHER, HOME, PREFERENCE) Type (data mime type) Extras (hashmap for custom data)
  • 18. Activities Application consists of activities Interacts with user Associated with views Requests data or services via Intents Calls other activities Services Background process MP3 player, polling sub-system
  • 19. Receivers Broadcast receivers (low battery, call, sms) Intent Receivers Intents registered with Android Content Providers Share data with activities / services Queries in the form of a URI content://contacts/people
  • 20.  
  • 21. Installing Dev Environment Java 5/6 Eclipse Android SDK $PATH ADT plugin Install Updates
  • 22. ADT Plugin Emulator, Device Controls Android Virtual Device Manager Dalvik Debug Monitor Service Debugger, LogCat File Explorer, Threads, Heap Physical Device Testing
  • 24. Poolster Online “football pools” application Entities: Game, User Game  Stake, Option, Ends To join User chooses an Option REST Webservice backend Clients: iPhone, Grails, Android, Silverlight
  • 25. Inside Poolster Directory Structure Manifest File App Launching Layout Files Menu
  • 26. Directory Structure /src /res /drawable (-ldpi, -hdpi) /layout (-small, -large, -land) /menu /raw /values /bin .class, .dex, .apk /gen R.java - constants
  • 27. AndroidManifest.xml <?xml version=&quot;1.0&quot; encoding=&quot;utf-8&quot;?> <manifest xmlns:android=&quot;http://schemas.android.com/apk/res/android&quot; package=&quot;com.talentica.poolster&quot; android:versionCode=&quot;1&quot; android:versionName=&quot;1.0&quot;> <uses-permission android:name=&quot;android.permission.INTERNET&quot;></uses-permission> <application android:icon=&quot;@drawable/icon&quot; android:label=&quot;@string/app_name&quot;> <activity android:name=&quot;.Main&quot; android:label=&quot;@string/app_name&quot;> <intent-filter> <action android:name=&quot;android.intent.action.MAIN&quot; /> <category android:name=&quot;android.intent.category.LAUNCHER&quot; /> </intent-filter> </activity> <activity android:name=&quot;.GamesList&quot; android:label=&quot;@string/app_name&quot;> </activity> <activity android:name=&quot;.Login&quot; android:label=&quot;@string/app_name&quot;> </activity> </application> <uses-sdk android:minSdkVersion=&quot;3&quot; /> </manifest>
  • 28. The Main activity Intent Action = android.intent.action.MAIN Category = android.intent.category.LAUNCHER Set layout Initialise views Set title, menu Launching another activity
  • 29. Layouts Absolute, Relative, Linear, Table Dips vs pixels Screen size/density Landscape Widgets: TextView , ListView, ImageView, EditText, RadioGroup, Gallery, Button
  • 30. Inside Poolster - 2 REST Client Xstream Internationalization Location, Maps Database Contacts AdMobs Integration
  • 31. Deploying Join Android Developer Program Eclipse Android Tool “Export Signed Package” Upload .apk file to Android Market
  • 32. Resources http://developer.android.com Professional Android Application Development (Wrox) Android Application Development (O’Riley) http://www.screaming-penguin.com/AndroidResources