This document provides an overview and introduction to developing applications for Google Glass. It discusses the key components of Glass including live cards, static cards and immersion. It then covers the software stack and looks at building a basic "Hello World" application using the Glass Development Kit (GDK). The document also discusses design patterns for Glassware including ongoing tasks, services and the Mirror API. It provides examples of using sensors, location services and other Glass features in applications. Finally, it discusses design principles for Glass and explores some example Glass apps.

1. PRESENTING
GOOGLE GLASS
PRESENTING
GOOGLE GLASS

2. For this presentation, and source code used, visit:
http://bit.ly/1qZDBhU
For this presentation, and source code used, visit:
http://bit.ly/1qZDBhU

3. Glass Components

4. Glass Experience

5. How to operate
On startup
Swipe
right
Swipe
left
Settings and life cards
Static cards and time-line
Say
“ok glass”
Voice
commands
Tap
Installed apps

6. Software Stack
Android
Subsystem
Glass
Subsystem
Glassware

7. Quick look at
Android Development
Quick look at
Android Development

8. Android Development
Prerequisite
– JDK 6 (or newer) installed
●
http://bit.ly/1iOZIrD
– ADT Bundle
– Android 4.4.2 (API 19) for Google Glass (with Glass Development Kit Preview)
●
Download: ADT Bundle (eclipse)
●
http://bit.ly/1gAwCcl

9. Eclipse IDE
Start eclipse
– <path-adt-bundle>/eclipse/eclipse
●
Perspectives
– Window > Open Perspectives > Other...
●
Java
●
Debug
●
DDMS
– Devices (connected), File Explorer, LogCat
●
Window > ADT Manager
– Android 4.4.2 (API 19) for Google Glass (with Glass Development
Kit Preview)
●
Window > Android Virtual Device Manager

10. Platform Tools
<path-adt-bundle>/sdk/platform-tools/adb
●
adb install application.apk
●
adb shell
– pm list packages -f
●
List of installed fqdn packages
●
adb uninstall fqdn-package-name

11. Android Basic Components
●
Resources
●
Activities
●
Services
●
Intents
●
Handlers
●
Logging

12. Resources
●
Layouts (xml)
●
Images (png)
●
Strings – i8n (xml)
●
Menus (xml)
●
Assets

13. Activity
●
self contained form
– with its own main thread to handle UI events
●
Derive from base class android.app.Activity
●
onCreate method
●
Other methods: onAttachedToWindow

14. Service
●
Derive class from base class android.app.Service
●
onStartCommand
●
onDestroy

15. Intent
To start an activity or service, and pass messages
between activities/services
●
Create Intent object,
– Activity
●
intent intAct = new intent(ctx,
myActivity.class);
●
startActivity(intAct);
●
startActivityForResult(intAct, iRequestCode);
●
onActivityResult(int requestCode, int
resultCode, Intent data)

16. Handler
●
Async event handler
●
Executes in main thread
●
Uses
– Execute pending jobs in queue
●
Handler handler = new Handler();
●
handler.post(new Runnable() {…});
– Inter thread synchronization by main thread
●
Handler handler = new Handler() { @Override
handleMessage(...) }

17. Log
Method
– Log.i(tag, msg) → for info
– Log.e(tag, msg) → for error
●
DDMS Logcat
– Set tag to filter messages from your application
or module

18. Glasswares and Glass
Development
Glasswares and Glass
Development

19. Application Types/Patterns
●
GDK Glassware
– Ongoing Task (Live Cards)
– Immersion
●
Mirror Glassware
– Static Cards (notifications)

20. GDK Glasswares:
Ongoing Tasks
GDK Glasswares:
Ongoing Tasks

21. Ongoing Task
Service
Live Card
Menu (as activities)

22. Hands-on
Ongoing Tasks: HelloGlass
Hands-on
Ongoing Tasks: HelloGlass

23. HelloGlass:UX
Tap to start
application
Tap to show menu

24. Life cards (Life cycle)

25. HelloGlass: Config
AndroidManifest.xml
– android:versionCode
– Uses-sdk
●
Only 19 supported at this time

26. HelloGlass: Classes
●
HelloGlassService
●
HelloGlassView
●
HelloGlassViewUpdater
●
MenuActivity

27. Application Flow
Android Manifest HelloGlassService
Voice command intent
Service LiveCard ViewUpdater View
Create
Register
Callback
MenuActivity
Attach using
pending intent
Publish
Surface
Created
Surface
Changed Draw(Assign)

28. HelloGlassService
●
AndroidManifest.xml
– Application > service
●
android:name (src)
●
@string/app_name
●
Intent-filter
●
@xml/voice_trigger_start
●
LiveCard
– Register rendering callback (HelloGlassViewUpdater)
– Attach Menu (MenuActivity)

29. HelloGlassView
●
Load layout
– @layout/card_hello.xml
●
findViewById

30. HelloGlassViewUpdater
●
Callbacks
– SurfaceCreated
– SurfaceChanged
●
Now start updating view

31. MenuActivity
●
onAttachedToWindow
●
onCreateOptionsMenu
●
@menu/hello.xml
●
onOptionsItemSelected
●
onOptionsMenuClosed
●
Handler

32. GDK Glasswares:
Immersion
GDK Glasswares:
Immersion

33. Immersion
●
Pros
– Full control, left/right swipes
●
Cons
– Must close before moving to other card

34. Hands-on
Immersion: GlassViewer
Hands-on
Immersion: GlassViewer

35. GlassViewer: UX
Swipe left Swipe left
Swipe left
Swipe right Swipe right
Swipe right
Swipe
Down
Tap
Start
Tap

36. GlassViewer
●
MainActivity
– onCreate
●
setContentView
– activity_main
– mGestureDetector
●
setBaseListener
– onGesture
●
SWIPE_LEFT, SWIPE_RIGHT, TAP, so on
●
onGenericMotionEvent
– Assets
●
getAssets().open

37. GDK Glasswares:
Application Add-ons
GDK Glasswares:
Application Add-ons

38. Voice Input
●
Commands List
– CALCULATE
– START_A_STOPWATCH
– START_IMAGING
– Complete list:
●
http://bit.ly/1jfwjaY

39. Touch Gestures
●
Gestures List
– LONG_PRESS
– SWIPE_UP
– TWO_LONG_PRESS
– TWO_SWIPE_DOWN
– TWO_TAP
– Complete list:
●
http://bit.ly/V3L4Ci

40. Camera
private static final int TAKE_PICTURE_REQUEST = 1;
private void takePicture() {
Intent intent = new
Intent(MediaStore.ACTION_IMAGE_CAPTURE);
startActivityForResult(intent,
TAKE_PICTURE_REQUEST);
}
@Override

41. Location Service
●
Obtain Location Manager
– LocationManager manager = getSystemService(Context.LOCATION_SERVICE);
●
Create criteria (accuracy level/altitude required?)
– Criteria criteria = new Criteria();
– criteria.setAccuracy(Criteria.ACCURACY_FINE);
– criteria.setAltitudeRequired(true);
●
Get providers list
– List<String> providers = locationManager.getProviders(
– criteria, true /* enabledOnly */);
●
For each provider in List, get location updates
– locationManager.requestLocationUpdates(provider, 0,
– 0, location_listener);

42. Location Service: Listener
●
Create subclass of LocationListener to pass in
requestLocationUpdates
– public void onLocationChanged(Location location)
●
Location object
– double getLatitude() → Get the latitude, in degrees.
– double getLongitude() → Get the longitude, in degrees.

43. Other sensors
●
Obtain sensor manager
– SensorManager mSensorManager = (SensorManager)
getSystemService(Context.SENSOR_SERVICE);
●
Obtain specific sensor object
– Sensor mSensor =
mSensorManager.getDefaultSensor(Sensor.TYPE_GRAVITY);
●
Register sensor listener
– mSensorManager.registerListener(sensor_listener, mSensor,
SensorManager.SENSOR_DELAY_NORMAL);

44. Other sensors: Listener
●
Create subclass of SensorEventListener to pass in registerListener
– public final void onSensorChanged(SensorEvent event)
●
SensorEvent object
– float sensorVal = event.values[0];

45. Other sensors: List
●
TYPE_ACCELEROMETER
●
TYPE_GYROSCOPE
●
TYPE_LIGHT
●
TYPE_MAGNETIC_FIELD
●
For complete list: http://bit.ly/1u0gI2T

46. Recap of UI Elements
The Glass user experience is based on 3 basic UI
elements
• Static card:
– Displays text, HTML, images, and video.
• Live card
– Used when users are actively engaged in a task
– Do not persist in the timeline
– Suited for real-time interaction with users
• Immersion
– Displays Android activities that take over the timeline
experience

47. Design Patterns for Glassware
• GDK (Glass Development Kit)
• Mirror API

48. What is Mirror API?
• Web-based services that interact with Google Glass
• Over a cloud
• Does not require running code on Glass
• User visits your web application from MyGlass and authenticates
• Your service sends cards to user as required

49. Why Mirror API?
• Lets you use language of your choice
• Platform independence
• Common infrastructure
• Built-in functionality

50. When to use Mirror API?
• Mirror API is great for delivering periodic
notifications to users as important things happen.
• For example:
– News delivery service that sends the top news stories

51. How Mirror API Works?
• Use RESTful services
• Encapsulate data through
JSON
• Authentication using
OAuth2
• Standard POST, GET and
PUT methods for sending,
listing and updating
information

52. Example: Daily Health Tip
• Daily Health Tips is implemented using Mirror API
– Users subscribe by authenticating with OAuth 2.0
– Health Tips stores an index of users and their
credentials
– New tip is published every day. It iterates through all
stored users and insert a timeline item into their

53. Inserting a New Static Card
• When Glassware inserts static cards into the
timeline, Glass may play a notification sound to
alert users.

54. Static Card
• Reside to the right of the Glass clock by default
• Display information to the user
• Do not require immediate attention
• Users can read or act on
the card at their
own leisure

55. What Else Can You Do?
• In addition, you can attach objects to a static card,
such as a location or media.
• Insert timeline card with attachment
• Attach video

56. Bundling Cards
• Distinguished with folded corner

57. Menu items
• Menu items allow users to request actions that are
related to the timeline card.
• Some Built-in menu items include:
– reading a timeline card aloud,
– navigating to a location,
– sharing an image,
– replying to a message

58. Subscriptions
• The Mirror API allows you to subscribe to
notifications that are sent when the user takes
specific actions:
– Reply
– Delete
– Custom menu item selected
– Location update
– Voice command
• When you subscribe to a notification, you provide a
callback URL that processes the notification.

59. Design Principles for Glass
• Different than existing mobile platforms in both
design and use. Follow these principles for best
experience:
– Design for Glass
– Don't get in the way
– Keep it relevant
– Avoid the Unexpected

60. LET US NOW EXPLORE SOME
GOOGLE GLASS APPS BY
10PEARLS
LET US NOW EXPLORE SOME
GOOGLE GLASS APPS BY
10PEARLS

61. LIVE CAM TRACKERLIVE CAM TRACKER

65. HANGMANHANGMAN

67. BRICK BREAKERBRICK BREAKER

69. QUIZ TIME!QUIZ TIME!