1. Marc Lester Tan
+ http://gplus.to/marctan
t @mharkus
in http://sg.linkedin.com/in/marclestertan

2. Exploring Android
A GTUG-PH Singapore Chapter Event
Marc Lester Tan
+ http://gplus.to/marctan
t @mharkus
in http://sg.linkedin.com/in/marclestertan

3. What is Android?

4. What is Android?
Application framework

5. What is Android?
Application framework
Dalvik VM

6. What is Android?
Application framework
Dalvik VM
Integrated browser based on WebKit

7. What is Android?
Application framework
Dalvik VM
Integrated browser based on WebKit
Optimized Graphics (skia for 2D and OpenGL ES for
3D)

8. What is Android?
Application framework
Dalvik VM
Integrated browser based on WebKit
Optimized Graphics (skia for 2D and OpenGL ES for
3D)
SQLite

9. What is Android?
Application framework
Dalvik VM
Integrated browser based on WebKit
Optimized Graphics (skia for 2D and OpenGL ES for
3D)
SQLite
Media Support

10. What is Android?
Application framework
Dalvik VM
Integrated browser based on WebKit
Optimized Graphics (skia for 2D and OpenGL ES for
3D)
SQLite
Media Support

11. What is Android?

12. What is Android?
GSM Telephony

13. What is Android?
GSM Telephony
Bluetooth, EDGE, 3G and WIFI

14. What is Android?
GSM Telephony
Bluetooth, EDGE, 3G and WIFI
Camera, GPS, compass and accelerometer

15. What is Android?
GSM Telephony
Bluetooth, EDGE, 3G and WIFI
Camera, GPS, compass and accelerometer
Rich Development Environment

16. Why Android?
• Statistics as of November 2011
• 200 million Android activations!
• Google Music Event (11/16/11)
• AppBrain Market Stats
• Google Phones List

17. Why Android?
200 million devices worldwide
• Statistics as of November 2011
• 200 million Android activations!
• Google Music Event (11/16/11)
• AppBrain Market Stats
• Google Phones List

18. Why Android?
200 million devices worldwide
6 billion downloads in Android Market
• Statistics as of November 2011
• 200 million Android activations!
• Google Music Event (11/16/11)
• AppBrain Market Stats
• Google Phones List

19. Why Android?
200 million devices worldwide
6 billion downloads in Android Market
550,000 activations per day
• Statistics as of November 2011
• 200 million Android activations!
• Google Music Event (11/16/11)
• AppBrain Market Stats
• Google Phones List

20. Why Android?
200 million devices worldwide
6 billion downloads in Android Market
550,000 activations per day
329,846 apps in the Android Market
• Statistics as of November 2011
• 200 million Android activations!
• Google Music Event (11/16/11)
• AppBrain Market Stats
• Google Phones List

21. Why Android?
200 million devices worldwide
6 billion downloads in Android Market
550,000 activations per day
329,846 apps in the Android Market
171 devices from 17 manufacturers
• Statistics as of November 2011
• 200 million Android activations!
• Google Music Event (11/16/11)
• AppBrain Market Stats
• Google Phones List

22. Top Mobile OEMs (US)
July 2011
Samsung 25.5%
LG 20.9%
Motorola 14.1%
Apple 9.5%
RIM 7.6%
http://www.comscore.com/Press_Events/Press_Releases/2011/8/comScore_Reports_July_2011_U.S._Mobile_Subscriber_Market_Share

23. Top Smartphone Platforms
July 2011
Google 41.8%
Apple 27.0%
RIM 21.7%
Microsoft 5.7%
Symbian 1.9%
http://www.comscore.com/Press_Events/Press_Releases/2011/8/comScore_Reports_July_2011_U.S._Mobile_Subscriber_Market_Share

24. Your First Android App

25. Your First Android App

26. Requirements

27. Requirements
Java SE 6

28. Requirements
Java SE 6
Android SDK

29. Requirements
Java SE 6
Android SDK
Eclipse Indigo or Maven 3.0

30. Requirements
Java SE 6
Android SDK
Eclipse Indigo or Maven 3.0
Android-Maven-Plugin if you want to use Maven

31. Requirements
Java SE 6
Android SDK
Eclipse Indigo or Maven 3.0
Android-Maven-Plugin if you want to use Maven
ADT plugin if you want to use Eclipse

32. Eclipse ADT Demo

33. Emulator

34. Emulator
Mimics most of the hardware
and software features of a
mobile device

35. Emulator
Mimics most of the hardware
and software features of a
mobile device
Can simulate application
interrupts such as incoming
SMS or phone calls

36. Emulator
Mimics most of the hardware
and software features of a
mobile device
Can simulate application
interrupts such as incoming
SMS or phone calls
Simulate GPS location fix

37. Emulator Limitations

38. Emulator Limitations
Placing or receiving phone calls

39. Emulator Limitations
Placing or receiving phone calls
USB connections

40. Emulator Limitations
Placing or receiving phone calls
USB connections
Camera / Video Capture (input)

41. Emulator Limitations
Placing or receiving phone calls
USB connections
Camera / Video Capture (input)
Determining Connected State

42. Emulator Limitations
Placing or receiving phone calls
USB connections
Camera / Video Capture (input)
Determining Connected State
Determining Battery charge level and AC
charging state

43. Emulator Limitations
Placing or receiving phone calls
USB connections
Camera / Video Capture (input)
Determining Connected State
Determining Battery charge level and AC
charging state
Unable to listen for SD Card insert/eject

44. Emulator Limitations
Placing or receiving phone calls
USB connections
Camera / Video Capture (input)
Determining Connected State
Determining Battery charge level and AC
charging state
Unable to listen for SD Card insert/eject
Bluetooth

45. Emulator Limitations
Placing or receiving phone calls
USB connections
Camera / Video Capture (input)
Determining Connected State
Determining Battery charge level and AC
charging state
Unable to listen for SD Card insert/eject
Bluetooth
Accelerometer

46. Application structure

47. Application structure
/src/ - location for all your java files

48. Application structure
/src/ - location for all your java files
/gen/ - autogenerated file R.java

49. Application structure
/src/ - location for all your java files
/gen/ - autogenerated file R.java
/assets/ - fonts, audio files and other compressed files

50. Application structure
/src/ - location for all your java files
/gen/ - autogenerated file R.java
/assets/ - fonts, audio files and other compressed files
/bin/ - target directory to store the dex file and the APK

51. Application structure
/src/ - location for all your java files
/gen/ - autogenerated file R.java
/assets/ - fonts, audio files and other compressed files
/bin/ - target directory to store the dex file and the APK
/res/ - drawables, layouts and strings

52. Application structure
/src/ - location for all your java files
/gen/ - autogenerated file R.java
/assets/ - fonts, audio files and other compressed files
/bin/ - target directory to store the dex file and the APK
/res/ - drawables, layouts and strings
AndroidManifest.xml - tells a lot of things about your
application

53. Application structure
/src/ - location for all your java files
/gen/ - autogenerated file R.java
/assets/ - fonts, audio files and other compressed files
/bin/ - target directory to store the dex file and the APK
/res/ - drawables, layouts and strings
AndroidManifest.xml - tells a lot of things about your
application
proguard.cfg - configuration file for source code
obfuscation

54. AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.mlst.hellogtug"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk android:minSdkVersion="10" />
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name" >
<activity
android:label="@string/app_name"
android:name=".Main" >
<intent-filter >
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>

55. AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.mlst.hellogtug"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk android:minSdkVersion="10" />
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name" >
<activity
android:label="@string/app_name"
android:name=".Main" >
<intent-filter >
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>

56. AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.mlst.hellogtug"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk android:minSdkVersion="10" />
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name" >
<activity
android:label="@string/app_name"
android:name=".Main" >
<intent-filter >
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>

57. AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.mlst.hellogtug"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk android:minSdkVersion="10" />
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name" >
<activity
android:label="@string/app_name"
android:name=".Main" >
<intent-filter >
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>

58. AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.mlst.hellogtug"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk android:minSdkVersion="10" />
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name" >
<activity
android:label="@string/app_name"
android:name=".Main" >
<intent-filter >
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>

59. AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.mlst.hellogtug"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk android:minSdkVersion="10" />
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name" >
<activity
android:label="@string/app_name"
android:name=".Main" >
<intent-filter >
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>

60. AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.mlst.hellogtug"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk android:minSdkVersion="10" />
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name" >
<activity
android:label="@string/app_name"
android:name=".Main" >
<intent-filter >
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>

61. AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.mlst.hellogtug"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk android:minSdkVersion="10" />
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name" >
<activity
android:label="@string/app_name"
android:name=".Main" >
<intent-filter >
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>

62. AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.mlst.hellogtug"
android:versionCode="1"
android:versionName="1.0" >
<uses-sdk android:minSdkVersion="10" />
<application
android:icon="@drawable/ic_launcher"
android:label="@string/app_name" >
<activity
android:label="@string/app_name"
android:name=".Main" >
<intent-filter >
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>
</manifest>

63. Activity
package com.mlst.hellogtug;
import android.app.Activity;
import android.os.Bundle;
public class Main extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
}
}

64. Activity
package com.mlst.hellogtug;
import android.app.Activity;
import android.os.Bundle;
public class Main extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
}
}

65. Activity
package com.mlst.hellogtug;
import android.app.Activity;
import android.os.Bundle;
public class Main extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
}
}

66. Activity
package com.mlst.hellogtug;
import android.app.Activity;
import android.os.Bundle;
public class Main extends Activity {
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.main);
}
}

67. XML-Based Layout (main.xml)
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/
apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/hello" />
</LinearLayout>

68. XML-Based Layout (main.xml)
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/
apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/hello" />
</LinearLayout>

69. XML-Based Layout (main.xml)
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/
apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/hello" />
</LinearLayout>

70. XML-Based Layout (main.xml)
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/
apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/hello" />
</LinearLayout>

71. XML-Based Layout (main.xml)
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/
apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/hello" />
</LinearLayout>

72. XML-Based Layout (main.xml)
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/
apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/hello" />
</LinearLayout>

73. XML-Based Layout (main.xml)
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/
apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/hello" />
</LinearLayout>

74. XML-Based Layout (main.xml)
<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/
apk/res/android"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
android:orientation="vertical" >
<TextView
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="@string/hello" />
</LinearLayout>

75. strings.xml
<?xml version="1.0" encoding="utf-8"?>
<resources>
<string name="hello">Hello World,
Main!</string>
<string name="app_name">HelloGTUG</
string>
</resources>

76. Running your application

77. Running your application
1. Launch the emulator

78. Running your application
1. Launch the emulator
2. Install the application using ADB or Android Debug
Bridge (adb install application.apk)

79. Running your application
1. Launch the emulator
2. Install the application using ADB or Android Debug
Bridge (adb install application.apk)
3. Monitor the logs by using Android Debug Bridge (adb
logcat or adb lolcat - adds more fun)

80. Running your application
1. Launch the emulator
2. Install the application using ADB or Android Debug
Bridge (adb install application.apk)
3. Monitor the logs by using Android Debug Bridge (adb
logcat or adb lolcat - adds more fun)
4.Modify code then repeat #2

81. Debugging your App
Window > Open Perspective > DDMS
Select the application to debug in Devices section
Click the green bug icon at the toolbar
Set your breakpoints

82. Questions