This document provides an overview of developing applications for the Android platform. It discusses trends in the mobile internet and smartphone market in India. It then covers the Android architecture, including activities, views, services, notifications, content providers, and intents. It demonstrates how to set up an Android development environment and build a simple "Hello World" app. Finally, it walks through developing a sample SMS app to send text messages.

1. Developing Applications for Android Platform Jayakumar Palanivel Founder & Director Thagatpam Tech

3. Why Android

4. Android Architecture

5. Developing Applications for Android

6. Environment

7. SDK

8. Market

11. > 5Lakhs apps

13. Complete OS(iOS, Android) with Application SDK Support

15. From Google and Open Handset Alliance

16. Free and Open Source, Linux based.

17. Adapted by many device makers

19. It is already the largest deployed mobile OS for smart phones

20. Capable of running in Tablets, eBook Readers, etc...

21. Good community support

24. Java

25. Dalvik VM

27. Emulator

28. Android SDK Model Activities View Services Notifications Content Providers Intents AndroidManifest.xml

30. UI Layout

31. Lifecycle & Behaviour

32. Related data

33. Similar to forms in HTML

34. Multiple activities can be live

37. Responds to events

38. Can be grouped as View Trees for creating complex UI

39. Can be defined in XML – Recommended

41. Provides parameters for the activities to use

42. Consists of intended action and the data from previous activity.

44. Example : Media player

45. No user interaction

47. SMS Received

48. New mail arrived

49. Sent through NotificationManager

50. Types

51. Persistent icon

52. Turning LEDS

54. Store

55. Retrieve

56. Only way to make data available across applications

57. Supports File system or SQLite.

58. Mostly SQLite

60. Create new android project

63. Resources

64. Icon

65. Layout

66. Strings

67. AndroidManifest.xml

69. Build Target : Google API 1.6 (API Level 4)

70. Application Name : MySMS

71. Package Name : com.tpm.android.sms

73. Edit String Resources Open res/values/strings.xml and add the following string resources <stringname="enter_sms">Enter SMS Text</string> <stringname="confirm">Send SMS</string>

74. Activity Coding Open src/com.tpm.android.sms/MySMS.java and insert a class member privateEditTextmSmsText; Create a new OnClick Event Listener Class publicclassOnClickListenerimplementsView.OnClickListener { @OverridepublicvoidonClick(View v) { String sms = mSmsText.getText().toString(); if (sms == null || sms.trim().length() ==0) { Toast.makeText(v.getContext(), "Enter a message", Toast.LENGTH_LONG).show(); } else { Toast.makeText(v.getContext(), "SMS Sent : " + sms , Toast.LENGTH_LONG).show(); } } }

75. Activity Coding Edit OnClick Method as shown below public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.main); mSmsText = (EditText)findViewById(R.id.body); Button confirmButton = (Button) findViewById(R.id.confirm); confirmButton.setOnClickListener(new OnClickListener()); } Compile and Run.

76. For on More Android http://developer.android.com Or you can reach us at http://thagatpam.com