This document provides an overview of developing applications for Android Wear and Google Cardboard. It discusses writing notification and native apps for Wear, using the WatchViewStub and DisplayManager APIs, and creating watchfaces. It also outlines the hardware components of Google Cardboard including lenses, cardboard, magnets and NFC tags. The Cardboard VR Toolkit is mentioned for building VR apps using OpenGL and the magnetometer for input.

1. Android Wear &
Cardboard
Marc Lester Tan
Mobility Innovation Center, SAP
marctan.com

2. LG G Watch Samsung Gear Live Moto 360

3. Writing Wear Apps
● Add notifications to existing apps
● Native applications
● Watchface

4. Notifications
NotificationCompat.Builder builder =
new NotificationCompat.Builder(this)
.setContentTitle(“some title”)
.setContentText(“Lorem ipsum dolor...”)
.setContentIntent(pendingIntent);
NotificationManagerCompat notificationManager =
NotificationManagerCompat.from(this);
notificationManager.notify(id, builder.build());

5. Native Applications
● Use Android Studio
● Android 4.4 KitKat Wear
(API 20)
● Separate modules for
mobile & wear devices

6. Native Applications
<?xml version="1.0" encoding="utf-8"?>
<android.support.wearable.view.WatchViewStub
….
app:rectLayout="@layout/rect_activity"
app:roundLayout="@layout/round_activity">
</android.support.wearable.view.WatchViewStub>

7. Watchface API
● Create watch faces
● Uses Broadcast Receiver for
ACTION_TIME_TICK
● Uses DisplayManager for
dimmed state
● Unofficial API and
discouraged by Google

8. DisplayManager
public void onDisplayChanged(int displayId) {
switch(displayManager.getDisplay(displayId).getState()){
case Display.STATE_DOZING:
case Display.STATE_OFF:
default:
}
}

9. Google Cardboard
● Biconvex Lenses
● Cardboard
● Rubber Band
● Velcro
● NFC Tags (optional)
● Neodynium Magnet and
Ceramic Disk Magnet

10. Cardboard VR Toolkit

11. Cardboard VR Toolkit
● OpenGL
● Uses magnetometer for
input
● Magnet renders the
compass unusable
● Experimental

12. Questions?