Professional Android Wearables

INTRODUCTION xix
PART I: CONCEPTS
CHAPTER 1: INTRODUCTION TO ANDROID WEARABLES 3
The Wearable Revolution 3
Dismantling the Computer: The Cyborg Dream 4
Software Everywhere 5
Fashion is More than Ski Jackets 6
Fitness 6
Time 7
Glasses 8
Summary 9
Recommended Reading 10
CHAPTER 2: THE INTERNET OF THINGS 11
How Wearables Relate to IoT 11
The Promise of Connectivity 12
Cisco's Vision 13
Big Data 13
Connected Devices in the Home 14
Connected Devices on the Go 15
Wireless Sensor Networks 16
A Scenario of Use of WSN 16
Bluetooth Versus ZigBee 17
Smart Cities 17
Summary 18
Recommended Reading 18
CHAPTER 3: PLATFORMS AND TECHNOLOGY 19
Android Wear 19
Installing the Wear SDK 20
Working with the Android Wear Emulator 20
Working with a Real Wear?]Enabled Device 22
Kick?]starting Your Wear Development 24
Distributing Wear Apps on Google Play 25
Summary 26
PART II: BASIC BUILDING BLOCKS
CHAPTER 4: NOTIFICATIONS ON SMALL SCREENS 29
About Notifications 29
Pre?]Wear Notification API 30
Wear Notifications 30
Building Notifications 32
The Simple Notification 33
Adding a Large Icon 34
Big Text Notification 35
Big Picture Notification 36
Updating a Notification 38
Adding Pages to Your Notifications 38
Adding Actions to Your Notifications 39
Adding a Standard Action 39
Adding Multiple Actions 41
Adding Wear?]Only Actions 41
Adding an Action without the Extra Page 42
Extra Options 43
Hiding the Application Icon 43
Moving the Notification 44
Setting the Scroll to the Bottom 44
Removing a Notification 45
Stacking Notifications 45
Summary 48
Recommended Reading 48
CHAPTER 5: DEVELOPING WEAR APPS 49
The Wear SDK 49
Design Considerations 49
Wearable UI Library 50
Creating the Wear Project 51
Editing the Gradle Files 55
Loading Layouts 56
Using WatchViewStub 56
Using InsetActivity 58
Building the User Interface 61
Adding Text to Your User Interface 61
CardFrame 61
CardScrollView 62
CardFragment 63
Displaying Images 66
Loading a Static Image 67
Adding a Progress Update 68
Handling Lists in Wear 69
Using WearableListView 69
The 2D Picker 72
Providing Positive Feedback 74
Starting the Success Feedback 75
Starting the Open?]on?]Phone Animation 76
Starting the Failure Feedback 76
Summary 77
Recommended Reading 77
CHAPTER 6: VOICE INPUT 79
Talking to Your Wrist 79
Types of Voice Interaction 80
Using System?]Provided Voice Commands 82
Just Launch an App 84
Hack an Existing Intent to Launch Your App 85
Launch Your App with Voice the "Right" Way 85
The Wear APIs 85
Data API 86
Message API 86
Node API 86
Answering to Notifications: Capturing Your Voice into an App 86
Creating a Simple App Sending a Notification 87
Creating Your Empty Project 87
Modifying the Gradle File 90
Modifying the App's Layout 91
Adding the Right Callback Function 93
Getting Your App to Receive a Voice Command 95
Revising the Callback Function 95
Adding a Broadcast Receiver 97
Modifying the App's Layout to Include a Text Field 98
Adding the New Class to the Manifest File 99
Adding the Reply String to the Strings File 100
How It Works 100
Showing the Answer on the App's Screen 101
Summary 103
Recommended Reading 104
CHAPTER 7: PUSHING DATA 105
Checking the Example 106
Phone's MyActivityPhone.java 107
Phone's AndroidManifest.xml 111
Wearable's MyActivityWear.java 112
Wearable's AndroidManifest.xml 114
Wearable's Listener 115
Making Your Google API Client from Scratch 116
Start with a Clean Project 117
The Phone's MyActivityPhone.java 117
The Phone's AndroidManifest.xml 119
The Phone's DataLayerListenerService 120
MyActivityWear.java 121
Wear's Android Manifest File 124
The Listener on the Wearable's Side 124
The Final Result 125
Summary 126
Recommended Reading 126
CHAPTER 8: LOCATION-BASED SERVICES ON ANDROID WEAR 127
Changing How Location Works 127
Accessing the Current Location 128
Enabling GPS support 128
Using the New APIs 128
Determining GPS Availability 131
Requesting the Last Known Location 131
Requesting Location Updates 132
Being Picky About Location Updates 134
Showing Your Street Address 135
Testing Geocoder Availability 135
Getting the Current Address for a Location 135
Summary 137
Recommended Reading 137
PART III: PROJECTS
CHAPTER 9: ANDROID WEAR AS ACTIVITY TRACKER 141
What Are Activity Trackers? 141
Wear as an Activity Tracker 142
Step Detector 142
Step Counter 143
Building the WalkKeeper App 143
Calculating Calories 143
Creating the Project 145
Selecting Gender 145
Selecting Weight 150
Selecting Height 152
The WalkKeeper Activity 154
Building the User Interface 154
Connecting the User Interface 155
Getting the Stored Settings 157
Reading the Sensor Data 158
Calculating and Updating the User Interface 160
Keeping the Activity Open 162
Improvements 165
Summary 165
CHAPTER 10: SMARTWATCH AS INPUT 167
Android Wear as a Game Controller 167
A Note on Sensors 168
Detecting Gestures 169
Building the Dice Game 169
Creating the Project 169
Designing a User Interface 169
Android Wear GUI 170
Mobile GUI 171
Accessing Sensors 173
Generating the Die Value 175
Connecting to Mobile 176
The Mobile Connection 176
The Wear Connection 178
Keeping the Screen On 182
The Dice Game 182
Improvements 182
Summary 183
Recommended Reading 183
CHAPTER 11: BUILD YOUR OWN GLASS 185
Augmented Reality and Virtual Reality 186
Augmented Reality 186
Google Glass 187
Virtual Reality 188
VR on a Phone 189
Building Your Own Glasses 190
Lenses 190
The Simplest Box Possible 191
The Simplest App 193
The cardboard.jar Library 193
Looking at the Code 194
The Glasses' MyActivityPhone.java 194
The Glasses' AndroidManifest.xml 196
A Couple More Classes 197
Getting Your Cardboard to Talk to Your Smartwatch 200
Start from the Previous Project 200
The Phone's MyActivityPhone.java 200
The Phone's AndroidManifest.xml 202
The Phone's DataLayerListenerService 203
MyActivityWear.java 204
The Wear Android Manifest File 207
The Final Result 207
Summary 207
INDEX 209