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Java Swing vs. Android App
 

Java Swing vs. Android App

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This presents my experience with building Swing apps vs. Android apps in the past 10+ years. It is not intended to go into deep details of technology but rather highlighting the main aspects and ...

This presents my experience with building Swing apps vs. Android apps in the past 10+ years. It is not intended to go into deep details of technology but rather highlighting the main aspects and differences between the 2 platforms

This presentation was given at The Ceara Java User Group meeting in Fortaleza, Ceara, Brasil December 9, 2011 by Johnny Hujol.

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    Java Swing vs. Android App Java Swing vs. Android App Presentation Transcript

    • Disclaimer-  The views expressed in this presentation are my personal views.-  Any opinions, comments, solutions or other commentary expressed by me are based on my experience.-  This presentation is presented for educational purposes and is therefore supplementary and not to be considered exhaustive. Swing vs. Android - Johnny Hujol - CEJUG Fortaleza, Brasil - 2011/12/09
    • BuildingSwing vs. Android Applications By Johnny Hujol
    • Who am I-  A French leaving in Boston.-  Software Engineer for a US pharmaceuticals company.-  10+ years in Biotech/Pharmaceuticals sector developing scientific applications.-  10+ years in Java.-  1+ year in Android.-  Co-published book on Java called‘Java for Bioinformatics and Biomedical Applications’.•  10+ years kitesurfing •  4th time in Taiba, Ceara, Brasil. Swing vs. Android - Johnny Hujol - CEJUG Fortaleza, Brasil - 2011/12/09
    • Agenda-  History-  Swing Application-  Android Application-  Development Environment-  Comparison-  Building Applications-  Conclusion Swing vs. Android - Johnny Hujol - CEJUG Fortaleza, Brasil - 2011/12/09
    • History-  1995: Oak (Java) was released for Sun machines.-  1996: Java 1 initial release.-  1998: Swing part of JDK 1.2.-  September 23, 2008: Android 1.0.-  July 28, 2011: JSE 7.0.-  October 2011: Android 4.0 (Ice Cream Sandwich). Swing vs. Android - Johnny Hujol - CEJUG Fortaleza, Brasil - 2011/12/09
    • Swing App Swing vs. Android - Johnny Hujol - CEJUG Fortaleza, Brasil - 2011/12/09
    • Swing App - Anatomy-  JFrame, JButton, custom Java classes, events, exceptions, etc.-  Implement algorithms, business rules, etc.-  Connect to some storage to deal with data i.e. database, web service, file system, memory, etc.-  Might have multiple background tasks running.-  Offline or online app.-  Goal: help people to do things better. Swing vs. Android - Johnny Hujol - CEJUG Fortaleza, Brasil - 2011/12/09
    • Swing App - Life Cycle-  Main() method as starting point of program. Swing vs. Android - Johnny Hujol - CEJUG Fortaleza, Brasil - 2011/12/09
    • Swing App – Multi-Threaded-  A Swing application is multi-threaded by nature.-  Single thread model for Event Dispatching Thread (EDT).-  Importance of (EDT) for UI responsiveness.-  EventQueue.invokeLater(Runnable).-  SwingWorker doInBackground() and done(). Swing vs. Android - Johnny Hujol - CEJUG Fortaleza, Brasil - 2011/12/09
    • Swing App – Multi-Threaded Swing vs. Android - Johnny Hujol - CEJUG Fortaleza, Brasil - 2011/12/09
    • Swing App – Multi-Threaded-  Do heavy work in the background.-  More fine and advanced control with java.util.concurrent package.-  Executors to do background works to keep UI responsive.-  FutureTask (java.util.concurrent). Swing vs. Android - Johnny Hujol - CEJUG Fortaleza, Brasil - 2011/12/09
    • Swing App – Multi-Threaded Swing vs. Android - Johnny Hujol - CEJUG Fortaleza, Brasil - 2011/12/09
    • Swing App - More-  Exception handling policy based on requirements.-  Custom exceptions.-  Asynchronous messaging mechanism with java.awt.event i.e. event classes and listener classes.-  System events i.e. MouseEvent, KeyboardEvent, screen, etc.-  Semantic events i.e. ActionEvent, TextEvent, etc.-  Events are always fired in the EDT. Swing vs. Android - Johnny Hujol - CEJUG Fortaleza, Brasil - 2011/12/09
    • Swing App – And More-  Internationalization.-  2D/3D/OpenGL, Media APIs, etc…-  Debugging tools.-  Logging, Tests, Profiling APIs.-  Compilers, JVMs.-  Encryption.-  More… Swing vs. Android - Johnny Hujol - CEJUG Fortaleza, Brasil - 2011/12/09
    • Android Application Swing vs. Android - Johnny Hujol - CEJUG Fortaleza, Brasil - 2011/12/09
    • Android App - Anatomy-  Activity, TextView, custom Java classes, exceptions, etc.-  Implement algorithms, business rules, etc.-  Connect to some storage to deal with data i.e. database, web service, file system, SD card, etc.-  Might have multiple background tasks running.-  Offline or online app.-  Goal: help people to do things better. Swing vs. Android - Johnny Hujol - CEJUG Fortaleza, Brasil - 2011/12/09
    • Android App - Components-  Activity = UI.-  Service = background tasks.-  Content Provider: sharing data uniformly from multiple apps.-  Broadcast receiver = big announcer across components or apps i.e. a broader event mechanism. Swing vs. Android - Johnny Hujol - CEJUG Fortaleza, Brasil - 2011/12/09
    • Android App – Life Cycle-  Components Life Cycle well defined.-  Activity (UI) starts with onCreate() in UI thread.-  Visible lifetime between onStart() and onStop().-  Foreground lifetime between onResume() and onPause(). Swing vs. Android - Johnny Hujol - CEJUG Fortaleza, Brasil - 2011/12/09
    • Android App – Activity Swing vs. Android - Johnny Hujol - CEJUG Fortaleza, Brasil - 2011/12/09
    • Android App - Multi-Threaded-  Single thread model for UI toolkit.-  The Andoid UI toolkit is not thread-safe.-  Do not block the UI thread.-  Do not access the Android UI toolkit outside the UI thread. Swing vs. Android - Johnny Hujol - CEJUG Fortaleza, Brasil - 2011/12/09
    • Android App - Multi-Threaded-  Activity.runOnUiThread(Runnable)-  View.post(Runnable)-  View.postDelayed(Runnable, long) Swing vs. Android - Johnny Hujol - CEJUG Fortaleza, Brasil - 2011/12/09
    • Android App - Multi-Threaded-  AsyncTask similar to SwingWorker.-  Package java.util.concurrent for Executors, etc. Swing vs. Android - Johnny Hujol - CEJUG Fortaleza, Brasil - 2011/12/09
    • Android App - More-  Exception handling policy based on requirements.-  Custom exceptions.-  Separation of layout from UI logic with XML.-  Notifications with Toast, Status Bar and Progress.-  Listeners.-  Sensor APIs for GPS, camera, telephony, accelerometer, etc. Swing vs. Android - Johnny Hujol - CEJUG Fortaleza, Brasil - 2011/12/09
    • Android App – And More-  Internalionalization.-  2D/3D, OpenGL, etc.-  Database, SD card, FS access.-  Configuration for multiple device specs.-  Encryption.-  And More… Swing vs. Android - Johnny Hujol - CEJUG Fortaleza, Brasil - 2011/12/09
    • Questions so far? Swing vs. Android - Johnny Hujol - CEJUG Fortaleza, Brasil - 2011/12/09
    • Development Environment-  I use IntelliJ IDEA for Swing and Android apps.-  Ant.-  Android command line to build initial Android project.-  Adb for interacting with USB plugged devices.-  XML layout profiler with Hierarchy Viewer.-  Android project libraries to share between apps. Swing vs. Android - Johnny Hujol - CEJUG Fortaleza, Brasil - 2011/12/09
    • Development Environment-  LogCat.-  Junit for testing, logging APIs.-  Monkey and monkeyrunner.-  Emulator.-  SensorSimulator.-  AndroidScreencast. Swing vs. Android - Johnny Hujol - CEJUG Fortaleza, Brasil - 2011/12/09
    • Development Environment Swing vs. Android - Johnny Hujol - CEJUG Fortaleza, Brasil - 2011/12/09
    • Comparison – Life Cycle-  Life Cycle for Android is well defined.-  All Android activities changes through states the same way.-  Save/restore state in the foreground lifetime onResume() and onPause().-  Important to release resources and kill background tasks when going on onPause().-  Save state in onPause() needs to execute quickly. Swing vs. Android - Johnny Hujol - CEJUG Fortaleza, Brasil - 2011/12/09
    • Comparison – Life Cycle-  Cannot ‘quit’ an Android application.-  Allow fast switching to Android apps.-  Users use many apps back and forth.-  Similar to opening lots of apps on computer when working. Swing vs. Android - Johnny Hujol - CEJUG Fortaleza, Brasil - 2011/12/09
    • Comparison – Multi-Threaded-  Transfer knowledge of Swing multi-threaded apps.-  Less frequent cases on Android apps than Swing apps.-  Simpler Android apps = less synchronization.-  New methods runOnUiThread, AsyncTack (SwingWorker).-  Cancelling policy more important on Android apps.-  Does user allow background services. Swing vs. Android - Johnny Hujol - CEJUG Fortaleza, Brasil - 2011/12/09
    • Comparison – Storage-  API for local Database (DB) like SQLLite.-  API for Web Services like Amazon S3.-  File System (FS) on device or remote.-  Harder to test web services on the emulator. Swing vs. Android - Johnny Hujol - CEJUG Fortaleza, Brasil - 2011/12/09
    • Comparison – Storage-  Internal storage with Context class.-  External storage i.e. SD card. Swing vs. Android - Johnny Hujol - CEJUG Fortaleza, Brasil - 2011/12/09
    • Comparison – Device Resources-  Battery is the most precious resource on Android devices.-  Do not write intensive computation in the background.-  Screen size very small with 2 mode landscape & portrait.-  Memory because no ‘quit’ manage the listeners i.e. like GPS location manager, etc. Swing vs. Android - Johnny Hujol - CEJUG Fortaleza, Brasil - 2011/12/09
    • Comparison – Device Resources-  Code impact on memory.-  Extends listener instead of creating inner class.-  Use primitive int instead of Enum class = less memory. Swing vs. Android - Johnny Hujol - CEJUG Fortaleza, Brasil - 2011/12/09
    • Comparison – Network-  Checking availability. Swing vs. Android - Johnny Hujol - CEJUG Fortaleza, Brasil - 2011/12/09
    • Comparison – Development Cycle-  Emulator might not be consistent to real device.-  Test directly on device more than emulator.-  Faster release because less features.-  Simpler application architecture on Android.-  Send logging info to network.-  Once deployed on production harder to debug. Swing vs. Android - Johnny Hujol - CEJUG Fortaleza, Brasil - 2011/12/09
    • Comparison – Sensors-  Native support on Android devices.-  Available on Swing through integration.-  Can have different specs depending on device.-  Getting easier with WiFi-Direct, Bluetooth, etc.-  Location based application more natural on Android. Swing vs. Android - Johnny Hujol - CEJUG Fortaleza, Brasil - 2011/12/09
    • Questions so far? Swing vs. Android - Johnny Hujol - CEJUG Fortaleza, Brasil - 2011/12/09
    • Building Apps-  Mobile nature of Android apps.-  New mobile paradigms to manipulate UI.-  Swing will adopt mobile paradigms.-  Android devices, computers and the cloud.-  Component model of Android apps.-  Similarity between 2 platforms. Swing vs. Android - Johnny Hujol - CEJUG Fortaleza, Brasil - 2011/12/09
    • Building Apps - Architecture-  Importance of separation of UI, business logic and storage in design of an app.-  Can reuse non-UI logic from Swing i.e. Data Access Object, etc.-  Easier to build an Android app from a multi-tier Swing apps, no need to test business logic again.-  Allow offline vs. online mode.-  Develop and reuse libraries. Swing vs. Android - Johnny Hujol - CEJUG Fortaleza, Brasil - 2011/12/09
    • Building Apps - Software Engineering-  Get your users involved.-  Deploy often.-  Continuously testing the system.-  Design Patterns.-  Design for reusability and maintenance.-  Network back-end for intensive computation tasks.-  Use primitive int in Android apps. Swing vs. Android - Johnny Hujol - CEJUG Fortaleza, Brasil - 2011/12/09
    • Building Apps - Assurance Quality-  Mock, Unit Test, MonkeyTest (Android), etc.-  Code static analysis.-  Use code reviews.-  Performance on memory with profiler.-  Multi-threaded apps easier on Android.-  Use logging API. Swing vs. Android - Johnny Hujol - CEJUG Fortaleza, Brasil - 2011/12/09
    • Conclusion-  Easy transition from Swing to/from Android.-  Faster to develop Android app.-  Well defined Life Cycle of Android app.-  Keep a design of apps simple.-  Allow offline and online mode for apps.-  Design apps more in a mobile way.-  Cloud based applications. Swing vs. Android - Johnny Hujol - CEJUG Fortaleza, Brasil - 2011/12/09
    • Questions & Answers Swing vs. Android - Johnny Hujol - CEJUG Fortaleza, Brasil - 2011/12/09
    • References•  Android –  http://developer.android.com•  Screencast –  http://code.google.com/p/androidscreencast/•  SensorSimulator –  http://code.google.com/p/openintents/wiki/SensorSimulator•  Android Way on Multitasking -  http://developer.android.com/resources/articles/multitasking-android-way.html Swing vs. Android - Johnny Hujol - CEJUG Fortaleza, Brasil - 2011/12/09