Android Wear Presentation

Introduction to
Android Wear
Talk by Chua Zi Yong
https://plus.google.com/+ZiYongChu
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What is Android Wear?
Introduction to Android Wear by Chua Zi Yong -
https://plus.google.com/+ZiYongChua

Notifications
Apps on Wear
Android Fit

Requires Android 4.3 and above Android
device
Latest Google Play Services and Android Wear
app from Google Play installed
Internet and connectivity over bluetooth from
paired device
Limited function when connection is lost

Getting Started – Install
SDK
Install the Android Wear SDK Tools from ADT
• Android ADT Revision v22.6 and above
• Android Wear ARM EABI v7a system image
• Update Android Support Library

Getting Started – Install
emulator
To install and test Android Wear emulator, you
need to (visit http://javapapers.com/android/android-wear-getting-started-tutorial/
for full details)
1) Sign up for developer preview
http://developer.android.com/wear/preview/signup.html
2) Create AVD
3) Connect Android device over adb (adb -d forward tcp:5601
tcp:5601)
4) Install Android Wear Preview from Google Play

Design for Wear
Wear apps should be
• Launched automatically
• Glance-able
• Works like a personal butler
• Zero to low interactions

Design for Wear
Two ways you can think of Wear
Interactions
• Extension of existing Android app notifications to work
better on Android Wear (existing notifications on phone
already appears on Wear)
• Android Wear specific app

Notifications for Wear
Extending your existing notifications to
Wear
• You can add voice input/actions directly from Wear
• You can add additional content in pages
• By swiping left/right on the wearable
• You can stack multiple notifications

Adding actions to Wear (It is very
simple)
• The same code before works the same on Wear (Including
notification actions, big view)
• Use NotificationCompat.WearableExtender() for Wearable-only
options (Appears only on Wear, not on phone)
• You can use addRemoteInput(remoteInput) to prompt user
for voice input
• P.S. Always use the NotificationManagerCompat instead of
NotificationManager (to support 4.1 and above features)

Adding actions to Wear (Eliza sample
cNootidficaetio)nCompat.Builder builder = new NotificationCompat.Builder(this) // All the usual
stuffs
.setContentTitle(getString(R.string.eliza))
.setContentText(mLastResponse)
.setLargeIcon(BitmapFactory.decodeResource(getResources(), R.drawable.bg_eliza))
.setSmallIcon(R.drawable.bg_eliza)
.setPriority(NotificationCompat.PRIORITY_MIN);
Intent intent = new Intent(ACTION_RESPONSE); // Intent to do your stuff
PendingIntent pendingIntent = PendingIntent.getService(this, 0, intent,
PendingIntent.FLAG_ONE_SHOT | PendingIntent.FLAG_CANCEL_CURRENT);
Notification notification = builder
.extend(new NotificationCompat.WearableExtender() // New notification
extension for Wear
.addAction(new NotificationCompat.Action.Builder(
R.drawable.ic_full_reply, getString(R.string.reply), pendingIntent) //
Get voice input
.addRemoteInput(new RemoteInput.Builder(EXTRA_REPLY)
.setLabel(getString(R.string.reply))
.build())
.build()))
.build();
NotificationManagerCompat.from(this).notify(0, notification);

Adding additional content in pages
(many at one time)
• For example, showing results of nearby search
• First, create an array list of notifications
• Next, generate a notification for each page you want to
display, and add them to your array list
• Last, use .addPages(List<Notifications>)to parse in your array
list

Adding additional content in pages (one
at a time)
• First, create the main (first) notification builder
• Next, create the new notification you want to insert
• Last, use .addPage(Notification) to add your notification

Adding additional content in pages
NotificationCompat.Builder notificationBuilder = new NotificationCompat.Builder(this) //
Main
.setSmallIcon(R.drawable.new_message)
.setContentTitle("Page 1")
.setContentText("Short message")
.setContentIntent(viewPendingIntent);
Notification secondPageNotification = new NotificationCompat.Builder(this) // Second
Notification
.build();
Notification twoPageNotification = new WearableExtender()
.addPage(secondPageNotification) // Add second notification to main
.extend(notificationBuilder)
.build();
notificationManager = NotificationManagerCompat.from(this);
notificationManager.notify(notificationId, twoPageNotification);

Stacking multiple notifications
• Use .setGroup(String key) to group your new notification to
existing group
• Use notify() to send the notification to Wear

Stacking multiple notifications
final static String GROUP_KEY_EMAILS = "group_key_emails"; // Key for group
ID
Notification notif = new NotificationCompat.Builder(mContext)
.setContentTitle("New mail from " + sender1)
.setContentText(subject1)
.setSmallIcon(R.drawable.new_mail);
.setGroup(GROUP_KEY_EMAILS) // Set group ID into notification
.build();
NotificationManagerCompat notificationManager =
NotificationManagerCompat.from(this);
notificationManager.notify(notificationId1, notif); // Send out the notification

Design for Wear
Two ways you can think of Wear
Interactions
• Extension of existing Android app notifications to work better
on Android Wear (existing notifications on phone already
appears on Wear)
• Android Wear specific app

Wear App API Architecture
Phone APK Wear APK

Node API
- Inform when Wear is connected
Message API
- Manage API calls
between devices
Data API
- Centralized data store
managed by GPS
GPS
Magic

To start communicating with the Wearable, we
need to initialize the GoogleApiClient on the
phone APK
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addApi(Wearable.API)
.build();
mGoogleApiClient.connect();

WearableListenerService will handle all the
callbacks from Google Play Services on wear
// Insert the service into the manifest of the Weak.apk, in this case name it
// AppListenerService (subclass of Abstract class WearableListenerService)
<service
android:name=“.AppListenerService”>
<intent-filter>
<action
android:name=“com.google.android.gms.wearable.BIND_LISTENER”/
>
</intent-filter>
</service>

In AppListenerService.java, you can manage
the callbacks from Node, Data and Message
listeners

Add Voice Action to Wear
You can trigger your app through voice actions

Just add the intent filter to your WearActivitiy
<activity
android:name=“MyWearActivity”>
<intent-filter>
<action android:name=“android.intent.action.SEND”/>
<category android:name =
“com.google.android.voicesearch.SELF_NOTE”/>
</intent-filter>
</activity>

Available commands today (approval process
similar to Google Glass)
More details:
https://developer.android.com/training/wearables/apps/voice.
html

Alternatively, you can use “Start
MyVoiceAction” to launch your app. Just
declare in manifest under label.
<activity android:name=“MyWearActivity" Android:label=“MyVoiceAction">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category
android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>

For additional input, say “Take a note”, follow
by user voice input, you can get the voice
input by calling startActivityForResult
// Create an intent that can start the Speech Recognizer activity
private void displaySpeechRecognizer() {
Intent intent = new
Intent(RecognizerIntent.ACTION_RECOGNIZE_SPEECH);
intent.putExtra(RecognizerIntent.EXTRA_LANGUAGE_MODEL,
RecognizerIntent.LANGUAGE_MODEL_FREE_FORM);
startActivityForResult(intent, SPEECH_REQUEST_CODE);
}

Code Demo Time

Android Wear Presentation

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