Intro To Android App Development presentation that I gave at the Cleveland Java Users Group on Feb 10, 2010

1. Introduction to Android Application Development Mike Kvintus Principal Engineer JDSU

3. What is Android?

4. Android Fundamentals

5. Getting Started with App Development

6. Demo

7. Tips/Links

8. Android Background

10. Part of the Open Handset Alliance

12. 1.6 – Donut Sept 15, 2009

13. 2.0/2.0.1 – Eclair Oct 26, 2009

14. 2.1 – Eclair Jan 12, 2010 Android Background

16. October, 2009, Gartner Inc. predicted that by 2012, Android would become the world's second most popular smartphone platform, behind only Symbian OS

18. Runs a Linux kernel

19. App development uses the Java language syntax

20. What is Android?

22. Dalvik virtual machine optimized for mobile devices

23. Integrated browser based on the open source WebKit engine

24. Optimized graphics powered by a custom 2D graphics library; 3D graphics based on the OpenGL ES 1.0 specification (hardware acceleration optional)

25. SQLite for structured data storage

26. Media support for common audio, video, and still image formats (MPEG4, H.264, MP3, AAC, AMR, JPG, PNG, GIF)

27. GSM Telephony (hardware dependent)

28. Bluetooth, EDGE, 3G, and WiFi (hardware dependent)

29. Camera, GPS, compass, and accelerometer (hardware dependent)

30. Rich development environment including a device emulator, tools for debugging, memory and performance profiling, and a plugin for the Eclipse IDE

31. Android Architecture

33. Content Providers that enable applications to access data from other applications (such as Contacts), or to share their own data

34. A Resource Manager, providing access to non-code resources such as localized strings, graphics, and layout files

35. A Notification Manager that enables all applications to display custom alerts in the status bar

36. An Activity Manager that manages the lifecycle of applications and provides a common navigation backstack

38. Media Libraries - based on PacketVideo's OpenCORE; the libraries support playback and recording of many popular audio and video formats, as well as static image files, including MPEG4, H.264, MP3, AAC, AMR, JPG, and PNG

39. Surface Manager - manages access to the display subsystem and seamlessly composites 2D and 3D graphic layers from multiple applications

40. LibWebCore - a modern web browser engine which powers both the Android browser and an embeddable web view

41. SGL - the underlying 2D graphics engine

42. 3D libraries - an implementation based on OpenGL ES 1.0 APIs; the libraries use either hardware 3D acceleration (where available) or the included, highly optimized 3D software rasterizer

43. FreeType - bitmap and vector font rendering

44. SQLite - a powerful and lightweight relational database engine available to all applications

46. The Dalvik VM executes files in the Dalvik Executable (.dex) format which is optimized for minimal memory footprint

48. Android Fundamentals

52. Reside under the res/ directory

53. Accessed via the generated R class

55. Apps can have 1 or more activities

56. Each activity is given a default window to draw in

57. Visual content of the window is provided by a hierarchy of views

58. One activity is designated the first one shown

59. Move from one activity to another by having the current activity start the next activity

60. Launched by passing an Intent object to Context.startActivity() or Activity.startActivityForResult()

61. Stopped by calling finish() or finishActivity() of another Activity

63. Start a service

65. Code can “bind” to a service and communicate with the service via the interface the service exposes

66. Runs on the app's main thread, so time consuming tasks should spawn another thread to avoid blocking the UI or other components

67. Launched by passing an Intent object to Context.startService()

68. Stopped by calling stopSelf() or Context.stopService()

70. Many broadcasts come from system code but apps can also initiate broadcasts

73. Activated when targeted by a request from a ContentResolver

74. Component Lifecycles

76. Describes the components of the app (activities, services, broadcast receivers, and content providers) **

77. Declares which permissions the app must have in order to access protected parts of the API and interact with other apps

78. Declares the permissions that others are required to have in order to interact with the app's components

79. Declares the minimum level of the Android API required

80. Lists the libraries that the app must be linked against

81. Determines which processes will host app components

83. Main component of the location framework is the LocationManager system service

85. geo nmea $GPRMC,081836,A,3751.65,S,14507.36,E,000.0,360.0,130998,011.3,E*62

87. Main class in the Maps package is com.google.android.maps.MapView, a subclass of ViewGroup

88. Wrapper around Google Maps API

89. Not part of the standard Android library

90. To display Google Maps data in a MapView, you must register with the Google Maps service and obtain a Maps API Key http://code.google.com/android/add-ons/google-apis/mapkey.html

92. Network – java.net.* and android.net.* classes

93. Getting Started with App Development

95. Java 5 or 6 JDK (JRE alone is not sufficient)

96. Apache Ant 1.6.5 or later for Linux and Mac, 1.7 or later for Windows

97. Android SDK ( http://developer.android.com/sdk/index.html )

103. Web apps

105. Get Google Maps API key (required if using Google Maps API)

106. Decide on the lowest release of Android you want to target

107. Create Android Project

108. Create components, layouts, classes, etc

109. Test using emulator

110. Export application package (.apk)

111. Load/test on Android device

112. Publish to Android Market (app must be signed, $25 signup fee ) or make app available for download

113. Android Fragmentation Android Platform Versions http://developer.android.com/resources/dashboard/platform-versions.html Source: http://developer.android.com/resources/dashboard/platform-versions.html Source: http://androidandme.com/2010/01/news/google-updates-android-fragmentation-numbers/

115. Turn on "USB Debugging" on your device

118. Demo Time

120. For ListView, use android:cacheColorHint="#00000000" when using a background image

121. Test with different screen resolutions and different devices if possible

122. Target the appropriate release of Android

124. Ruboto - JRuby on Android http://github.com/headius/ruboto-irb

125. ASE – Android Scripting Environment http://code.google.com/p/android-scripting/

126. Many others

128. THANKS! Q & A