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Developing for Android Wear

This document provides an overview of developing for Android Wear. It discusses using notifications as the primary way to extend functionality from handheld apps to wearables. Notifications can be customized with actions, voice input, and multiple pages of content. For more complex experiences, custom wearable apps can be built that run directly on the device. These apps have activity-based interfaces but require simpler designs optimized for small screens and brief interactions.

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Developing for Android Wear Can Elmas
@can_elmas Software Development Manager at Monitise MEA (formerly Pozitron) Backend and front-end roles in mobile projects since 2007 Currently leading Monitise MEA Android team
2014 - 2015, exciting years for wearable tech Android Wear, Apple Watch, Nike FuelBand, Pebble, Jawbone, Fitbit and more Over 720,000 Android Wear devices shipped in 2014 957,000 Apple Watches on the first day of pre-sales More than 1 million Pebble sold since 2013 Big players; Motorola, LG, Samsung, Sony, Asus, Tag Heuer 1201 android-wear tagged questions on StackOverflow; 517 for apple-watch* * data gathered on May the 9th Numbers
The market is still young
What You Can Do Get / Set reminders Track fitness Voice Search Start navigation See weather Control remote media Stay connected!
Call a car/taxi Take a note Set alarm Set timer Start stopwatch Start/Stop a bike ride Show heart rate Show step count Voice Commands
Voice Commands Declare your own app-provided voice actions to start activities “OK Google, start Lovely App” 
 <activity
 android:name=".MainActivity"
 android:label="Lovely App" >
 <intent-filter>
 <action android:name="android.intent.action.MAIN" />
 <category android:name="android.intent.category.LAUNCHER" />
 </intent-filter>
 </activity>

≠
Do not port a small version of your handheld app
The Vision Suggest Demand Context Stream Cue Card
The Vision Launched Automatically
The Vision Glanceable
The Vision Suggest and Demand
The Vision Zero or low interaction
Design Principles Do not stop user from cooking, eating, walking, running Design for big gestures Think about stream cards first i.e. notifications-instead-of-apps model Do one thing, really fast
Google Play Services
No Play Store
Contextual Notifications Custom App Developing for Android Wear
Notifications
Notifications No additional effort required
Notifications No additional effort required however..
Extending Notifications with Wearable Functionality For a better user experience Wearable Only Actions Voice Capabilities Extra Pages
Android 4.3 (API Level 18) or higher Android v4 support library (or v13, which includes v4) 400x400 for non-scrolling and 640x400 for parallax scrolling background images in res/drawable-nodpi Other non-bitmap resources in res/drawable-hdpi 
 import android.support.v4.app.NotificationCompat;
 import android.support.v4.app.NotificationManagerCompat;
 import android.support.v4.app.NotificationCompat.WearableExtender;

Notifications final int notificationId = 1;
 final NotificationCompat.Builder builder = new NotificationCompat.Builder(context)
 .setSmallIcon(R.drawable.ic_notif)
 .setContentTitle("Hello Wearable!")
 .setContentText("Sample text");
 NotificationManagerCompat.from(context).notify(notificationId, builder.build());

Notifications final int notificationId = 1;
 final NotificationCompat.Builder builder = new NotificationCompat.Builder(context)
 .setSmallIcon(R.drawable.ic_notif)
 .setContentTitle("Hello Wearable!")
 .setContentText("Sample text");
 NotificationManagerCompat.from(context).notify(notificationId, builder.build());

Notifications final int notificationId = 1;
 final NotificationCompat.Builder builder = new NotificationCompat.Builder(context)
 .setSmallIcon(R.drawable.ic_notif)
 .setContentTitle("Hello Wearable!")
 .setContentText("Sample text");
 NotificationManagerCompat.from(context).notify(notificationId, builder.build());

Notifications final int notificationId = 1;
 final NotificationCompat.Builder builder = new NotificationCompat.Builder(context)
 .setSmallIcon(R.drawable.ic_notif)
 .setContentTitle("Hello Wearable!")
 .setContentText("Sample text");
 NotificationManagerCompat.from(context).notify(notificationId, builder.build());

final int notificationId = 1;
 
 final NotificationCompat.Builder builder = new NotificationCompat.Builder(context)
 .setSmallIcon(R.drawable.ic_notif)
 .setContentTitle("Hello Wearable!")
 .setContentText("Sample text")
 .setContentIntent(browserPendingIntent(context))
 .setLargeIcon(BitmapFactory.decodeResource(
 context.getResources(),
 R.drawable.ic_notif_large
 ));
 
 NotificationManagerCompat.from(context).notify(notificationId, builder.build()); Notifications
final int notificationId = 1;
 
 final NotificationCompat.Builder builder = new NotificationCompat.Builder(context)
 .setSmallIcon(R.drawable.ic_notif)
 .setContentTitle("Hello Wearable!")
 .setContentText("Sample text")
 .setContentIntent(browserPendingIntent(context))
 .setLargeIcon(BitmapFactory.decodeResource(
 context.getResources(),
 R.drawable.ic_notif_large
 ));
 
 NotificationManagerCompat.from(context).notify(notificationId, builder.build()); Notifications
Extending Notifications : Actions final NotificationCompat.Builder builder = new NotificationCompat.Builder(context)
 .setSmallIcon(R.drawable.ic_notif)
 .setContentTitle("HoverBoard is on sale!")
 .setContentText("Check it out!")
 .setContentIntent(itemDetailsIntent(context))
 .setLargeIcon(BitmapFactory.decodeResource(
 context.getResources(),
 R.drawable.bg_hoverboard2
 ));
 
 // Handheld only actions
 builder.addAction(R.drawable.ic_add_to_cart, "Add to Cart", addToCartIntent(context));
 
 // Wearable-only actions
 final NotificationCompat.WearableExtender wearableExtender = new NotificationCompat.WearableExtender();
 
 wearableExtender.addAction(
 new NotificationCompat.Action(
 R.drawable.ic_navigation, 
 "Start Navigation", 
 navigationIntent(context))
 );
 
 builder.extend(wearableExtender);
Extending Notifications : Actions final NotificationCompat.Builder builder = new NotificationCompat.Builder(context)
 .setSmallIcon(R.drawable.ic_notif)
 .setContentTitle("HoverBoard is on sale!")
 .setContentText("Check it out!")
 .setContentIntent(itemDetailsIntent(context))
 .setLargeIcon(BitmapFactory.decodeResource(
 context.getResources(),
 R.drawable.bg_hoverboard2
 ));
 
 // Handheld only actions
 builder.addAction(R.drawable.ic_add_to_cart, "Add to Cart", addToCartIntent(context));
 
 // Wearable-only actions
 final NotificationCompat.WearableExtender wearableExtender = new NotificationCompat.WearableExtender();
 
 wearableExtender.addAction(
 new NotificationCompat.Action(
 R.drawable.ic_navigation, 
 "Start Navigation", 
 navigationIntent(context))
 );
 
 builder.extend(wearableExtender);
Extending Notifications : Actions final NotificationCompat.Builder builder = new NotificationCompat.Builder(context)
 .setSmallIcon(R.drawable.ic_notif)
 .setContentTitle("HoverBoard is on sale!")
 .setContentText("Check it out!")
 .setContentIntent(itemDetailsIntent(context))
 .setLargeIcon(BitmapFactory.decodeResource(
 context.getResources(),
 R.drawable.bg_hoverboard2
 ));
 
 // Handheld only actions
 builder.addAction(R.drawable.ic_add_to_cart, "Add to Cart", addToCartIntent(context));
 
 // Wearable-only actions
 final NotificationCompat.WearableExtender wearableExtender = new NotificationCompat.WearableExtender();
 
 wearableExtender.addAction(
 new NotificationCompat.Action(
 R.drawable.ic_navigation,
 “Nearest Shop",
 navigationIntent(context))
 );
 
 builder.extend(wearableExtender);
Extending Notifications : Actions final NotificationCompat.Builder builder = new NotificationCompat.Builder(context)
 .setSmallIcon(R.drawable.ic_notif)
 .setContentTitle("HoverBoard is on sale!")
 .setContentText("Check it out!")
 .setContentIntent(itemDetailsIntent(context))
 .setLargeIcon(BitmapFactory.decodeResource(
 context.getResources(),
 R.drawable.bg_hoverboard2
 ));
 
 // Handheld only actions
 builder.addAction(R.drawable.ic_add_to_cart, "Add to Cart", addToCartIntent(context));
 
 // Wearable-only actions
 final NotificationCompat.WearableExtender wearableExtender = new NotificationCompat.WearableExtender();
 
 wearableExtender.addAction(
 new NotificationCompat.Action(
 R.drawable.ic_navigation,
 "Start Navigation",
 navigationIntent(context))
 );
 
 builder.extend(wearableExtender);
Extending Notifications : Voice Capabilities public static final String EXTRA_VOICE_REPLY = "extra_voice_reply";
 
 final RemoteInput remoteInput = new RemoteInput.Builder(EXTRA_VOICE_REPLY)
 .setLabel("Rate the session")
 .build();
public static final String EXTRA_VOICE_REPLY = "extra_voice_reply";
 
 final RemoteInput remoteInput = new RemoteInput.Builder(EXTRA_VOICE_REPLY)
 .setLabel("Rate the session")
 .setChoices(context.getResources().getStringArray(R.array.reply_choices))
 .build(); <string-array name="reply_choices">
 <item>It was alright</item>
 <item>Not so useful</item>
 </string-array> Extending Notifications : Voice Capabilities
... final NotificationCompat.Builder builder = new NotificationCompat.Builder(context)
 .setSmallIcon(R.drawable.ic_notif)
 .setContentTitle("Was the session helpful?")
 .setContentIntent(openSessionDetailsIntent(context))
 .setLargeIcon(BitmapFactory.decodeResource(
 context.getResources(),
 R.drawable.bg_gdg
 ));
 
 builder.extend(
 new NotificationCompat.WearableExtender()
 .addAction(
 new NotificationCompat.Action.Builder(
 R.drawable.abc_ic_voice_search_api_mtrl_alpha,
 "Reply",
 openSessionDetailsIntent(context)
 ).addRemoteInput(remoteInput).build()
 ) ); ... Extending Notifications : Voice Capabilities
... final NotificationCompat.Builder builder = new NotificationCompat.Builder(context)
 .setSmallIcon(R.drawable.ic_notif)
 .setContentTitle("Was the session helpful?")
 .setContentIntent(openSessionDetailsIntent(context))
 .setLargeIcon(BitmapFactory.decodeResource(
 context.getResources(),
 R.drawable.bg_gdg
 ));
 
 builder.extend(
 new NotificationCompat.WearableExtender()
 .addAction(
 new NotificationCompat.Action.Builder(
 R.drawable.abc_ic_voice_search_api_mtrl_alpha,
 "Reply",
 openSessionDetailsIntent(context)
 ).addRemoteInput(remoteInput).build()
 ) ); ... Extending Notifications : Voice Capabilities
... final NotificationCompat.Builder builder = new NotificationCompat.Builder(context)
 .setSmallIcon(R.drawable.ic_notif)
 .setContentTitle("Was the session helpful?")
 .setContentIntent(openSessionDetailsIntent(context))
 .setLargeIcon(BitmapFactory.decodeResource(
 context.getResources(),
 R.drawable.bg_gdg
 ));
 
 builder.extend(
 new NotificationCompat.WearableExtender()
 .addAction(
 new NotificationCompat.Action.Builder(
 R.drawable.abc_ic_voice_search_api_mtrl_alpha,
 "Reply",
 openSessionDetailsIntent(context)
 ).addRemoteInput(remoteInput).build()
 ) ); ... Extending Notifications : Voice Capabilities
… final NotificationCompat.Builder builder = new NotificationCompat.Builder(context)
 .setSmallIcon(R.drawable.ic_notif)
 .setContentTitle("Was the session helpful?")
 .setContentIntent(openSessionDetailsIntent(context))
 .setLargeIcon(BitmapFactory.decodeResource(
 context.getResources(),
 R.drawable.bg_gdg
 ));
 
 builder.extend(
 new NotificationCompat.WearableExtender()
 .addAction(
 new NotificationCompat.Action.Builder(
 R.drawable.abc_ic_voice_search_api_mtrl_alpha,
 "Reply",
 openSessionDetailsIntent(context)
 ).addRemoteInput(remoteInput).build()
 )
 ); …. Extending Notifications : Voice Capabilities
Extending Notifications : Pages More information without requiring user to open the app on the handheld final NotificationCompat.Builder builder = new NotificationCompat.Builder(context)
 .setSmallIcon(R.drawable.ic_notif)
 .setContentTitle("New Pancake Recipe!")
 .setContentText("Start making now!")
 .setContentIntent(openRecipeIntent(context))
 .setLargeIcon(BitmapFactory.decodeResource(
 context.getResources(),
 R.drawable.bg_pancakes1
 ));
Extending Notifications : Pages final Notification secondPage = new NotificationCompat.Builder(context)
 .setContentTitle("Step 1")
 .setContentText(RECIPE_STEP_1)
 .setLargeIcon(BitmapFactory.decodeResource(
 context.getResources(),
 R.drawable.bg_pancakes2
 )).build();
 
 final Notification thirdPage = new NotificationCompat.Builder(context)
 .setContentTitle("Step 2")
 .setContentText(RECIPE_STEP_2)
 .setLargeIcon(BitmapFactory.decodeResource(
 context.getResources(),
 R.drawable.bg_pancakes3
 )).build(); builder.extend(
 new NotificationCompat.WearableExtender()
 .addPage(secondPage)
 .addPage(thirdPage)
 ).build();
Extending Notifications : Pages final Notification secondPage = new NotificationCompat.Builder(context)
 .setContentTitle("Step 1")
 .setContentText(RECIPE_STEP_1)
 .setLargeIcon(BitmapFactory.decodeResource(
 context.getResources(),
 R.drawable.bg_pancakes2
 )).build();
 
 final Notification thirdPage = new NotificationCompat.Builder(context)
 .setContentTitle("Step 2")
 .setContentText(RECIPE_STEP_2)
 .setLargeIcon(BitmapFactory.decodeResource(
 context.getResources(),
 R.drawable.bg_pancakes3
 )).build();
 
 builder.extend(
 new NotificationCompat.WearableExtender()
 .addPage(secondPage)
 .addPage(thirdPage)
 ).build();
Extending Notifications : Pages builder.extend(
 new NotificationCompat.WearableExtender()
 .addPage(secondPage)
 .addPage(thirdPage)
 ).build(); final NotificationCompat.Builder builder = new NotificationCompat.Builder(context)
 .setSmallIcon(R.drawable.ic_notif)
 .setContentTitle("New Pancake Recipe!")
 .setContentText("Start making now!")
 .setContentIntent(openRecipeIntent(context))
 .setLargeIcon(BitmapFactory.decodeResource(
 context.getResources(),
 R.drawable.bg_pancakes1
 )); . // second page ... ... . // third page ...
Sometimes notifications are not enough
not possible with notifications
Custom Wearable Apps Run directly on the device Fundamentally same as apps built for handheld but differ greatly in design and usability Basically activities with custom layouts Access to sensors and GPU Small in size and functionality
Custom Wearable Apps Different code base, no shared resources, different applications Custom notifications issued on the wearable are not synced with handheld When the device goes to sleep, activity gets destroyed No back or home button to exit the app Swiping from the left edge or Long press on the app
Custom Wearable Apps : Unsupported APIs android.webkit android.print android.app.backup android.appwidget android.hardware.usb

 dependencies {
 ...
 compile 'com.google.android.support:wearable:1.1.0'
 compile 'com.google.android.gms:play-services-wearable:7.3.0'
 }
 SDK tools 23.0.0 or higher API 20 or higher Enable Debug over Bluetooth on both Wearable and Handheld (Android Wear companion app) adb forward tcp:4444 localabstract:/adb-hub adb connect localhost:4444
Custom Wearable Apps : Wearable UI Library BoxInsetLayout CardFragment CircledImageView CrossFadeDrawable DelayedConfirmationView DismissOverlayView DotsPageIndicator GridViewPager GridPagerAdapter FragmentGridPagerAdapter WatchViewStub WearableListView
Custom Wearable Apps : Wearable UI Library CardFragment BoxInsetLayout
Custom Wearable Apps : Wearable UI Library GridViewPager WearableListView
Sending and Syncing Data Message API Data API Node API to sync data across all Wear devices great for one way communication “fire&forget” to learn about local or connected Nodes
Sending and Syncing Data Channel API send large data or stream data between two or more devices
Sending and Syncing Data Channel API send large data or stream data between two or more devices
Sending and Syncing Data Capability API to learn about capabilities provided by nodes on the Wear network
Sending and Syncing Data : Handheld googleApiClient = new GoogleApiClient.Builder(this)
 .addConnectionCallbacks(this)
 .addOnConnectionFailedListener(this)
 .addApi(Wearable.API)
 .build();
@Override
 public void onConnected(Bundle bundle) { sendFlightInfo();
 }
 
 @Override
 public void onConnectionSuspended(int cause) {
 ...
 }
 
 @Override
 public void onConnectionFailed(ConnectionResult connectionResult) {
 ...
 } @Override
 protected void onStart() {
 super.onStart();
 googleApiClient.connect();
 }
 
 @Override
 protected void onStop() {
 googleApiClient.disconnect();
 super.onStop();
 } Sending and Syncing Data : Handheld
@Override
 public void onConnected(Bundle bundle) { sendFlightInfo();
 }
 
 @Override
 public void onConnectionSuspended(int cause) {
 ...
 }
 
 @Override
 public void onConnectionFailed(ConnectionResult connectionResult) {
 ...
 } @Override
 protected void onStart() {
 super.onStart();
 googleApiClient.connect();
 }
 
 @Override
 protected void onStop() {
 googleApiClient.disconnect();
 super.onStop();
 } Sending and Syncing Data : Handheld
private void sendFlightInfo() {
 
 final PutDataMapRequest request = PutDataMapRequest.create("/add-airlines/flight");
 
 request.getDataMap().putString("from", "SAW");
 request.getDataMap().putString("to", "ESB");
 request.getDataMap().putString("gate", "G22");
 request.getDataMap().putString("barcode", barcodeData);
 
 Wearable.DataApi.putDataItem(googleApiClient, request.asPutDataRequest())
 .setResultCallback(new ResultCallback<DataApi.DataItemResult>() {
 @Override
 public void onResult(DataApi.DataItemResult dataItemResult) {
 
 if (!dataItemResult.getStatus().isSuccess()) {
 // handle error
 }
 }
 });
 
 } Sending and Syncing Data : Handheld
private void sendFlightInfo() {
 
 final PutDataMapRequest request = PutDataMapRequest.create("/add-airlines/flight");
 
 request.getDataMap().putString("from", "SAW");
 request.getDataMap().putString("to", "ESB");
 request.getDataMap().putString("gate", "G22");
 request.getDataMap().putString("barcode", barcodeData);
 
 Wearable.DataApi.putDataItem(googleApiClient, request.asPutDataRequest())
 .setResultCallback(new ResultCallback<DataApi.DataItemResult>() {
 @Override
 public void onResult(DataApi.DataItemResult dataItemResult) {
 
 if (!dataItemResult.getStatus().isSuccess()) {
 // handle error
 }
 }
 });
 
 } Sending and Syncing Data : Handheld
private void sendFlightInfo() {
 
 final PutDataMapRequest request = PutDataMapRequest.create("/add-airlines/flight");
 
 request.getDataMap().putString("from", "SAW");
 request.getDataMap().putString("to", "ESB");
 request.getDataMap().putString("gate", "G22");
 request.getDataMap().putString("barcode", barcodeData);
 
 Wearable.DataApi.putDataItem(googleApiClient, request.asPutDataRequest())
 .setResultCallback(new ResultCallback<DataApi.DataItemResult>() {
 @Override
 public void onResult(DataApi.DataItemResult dataItemResult) {
 
 if (!dataItemResult.getStatus().isSuccess()) {
 // handle error
 }
 }
 });
 
 } Sending and Syncing Data : Handheld
private void sendFlightInfo() {
 
 final PutDataMapRequest request = PutDataMapRequest.create("/add-airlines/flight");
 
 request.getDataMap().putString("from", "SAW");
 request.getDataMap().putString("to", "ESB");
 request.getDataMap().putString("gate", "G22");
 request.getDataMap().putString("barcode", barcodeData);
 
 Wearable.DataApi.putDataItem(googleApiClient, request.asPutDataRequest())
 .setResultCallback(new ResultCallback<DataApi.DataItemResult>() {
 @Override
 public void onResult(DataApi.DataItemResult dataItemResult) {
 
 if (!dataItemResult.getStatus().isSuccess()) {
 // handle error
 }
 }
 });
 
 } Sending and Syncing Data : Handheld
Sending and Syncing Data : Wearable <service android:name=".datalayerapi.DataLayerListenerService">
 <intent-filter>
 <action android:name="com.google.android.gms.wearable.BIND_LISTENER" />
 </intent-filter>
 </service> public class DataLayerListenerService extends WearableListenerService {
 
 @Override
 public void onDataChanged(DataEventBuffer dataEvents) {
 
 for (DataEvent event : dataEvents) {
 
 final DataItem item = event.getDataItem();
 
 if (item.getUri().getPath().compareTo("/add-airlines/flight") == 0) {
 
 DataMap dataMap = DataMapItem.fromDataItem(item).getDataMap();
 
 //raiseLocalBoardingPassNotification(dataMap);
 startBoardingPassActivity(dataMap);
 
 }
 }
 } ...
 
 }

Sending and Syncing Data : Wearable <service android:name=".datalayerapi.DataLayerListenerService">
 <intent-filter>
 <action android:name="com.google.android.gms.wearable.BIND_LISTENER" />
 </intent-filter>
 </service> public class DataLayerListenerService extends WearableListenerService {
 
 @Override
 public void onDataChanged(DataEventBuffer dataEvents) {
 
 for (DataEvent event : dataEvents) {
 
 final DataItem item = event.getDataItem();
 
 if (item.getUri().getPath().compareTo("/add-airlines/flight") == 0) {
 
 DataMap dataMap = DataMapItem.fromDataItem(item).getDataMap();
 
 //raiseLocalBoardingPassNotification(dataMap);
 startBoardingPassActivity(dataMap);
 
 }
 }
 } ...
 
 }

Sending and Syncing Data : Wearable <service android:name=".datalayerapi.DataLayerListenerService">
 <intent-filter>
 <action android:name="com.google.android.gms.wearable.BIND_LISTENER" />
 </intent-filter>
 </service> public class DataLayerListenerService extends WearableListenerService {
 
 @Override
 public void onDataChanged(DataEventBuffer dataEvents) {
 
 for (DataEvent event : dataEvents) {
 
 final DataItem item = event.getDataItem();
 
 if (item.getUri().getPath().compareTo("/add-airlines/flight") == 0) {
 
 DataMap dataMap = DataMapItem.fromDataItem(item).getDataMap();
 
 //raiseLocalBoardingPassNotification(dataMap);
 startBoardingPassActivity(dataMap);
 
 }
 }
 } ...
 
 }

What’s Next and What to Expect? New Google Play Services 7.3 features; Channel API and Capability API WatchFace API More to check on Data Layer APIs and UI library Android Wear 5.1 Update; Wi-Fi support, always-on screen, emojis, gesture controls, new app picker and rapid contacts Google IO 15 Sessions Smarter and personalized device authentication with Smart Lock Simplifying app development using the wearable support library Android Wear: Your app and the always-on screen
Resources https://developer.android.com/training/building-wearables.html https://www.youtube.com/playlist?list=PLWz5rJ2EKKc-kIrPiq098QH9dOle-fLef Building Apps for Wearables DevBytes: Android Wear
Thank You! @can_elmas speakerdeck.com/canelmas github.com/canelmas

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Developing for Android Wear

  • 1.
  • 2.
    @can_elmas Software Development Managerat Monitise MEA (formerly Pozitron) Backend and front-end roles in mobile projects since 2007 Currently leading Monitise MEA Android team
  • 3.
    2014 - 2015,exciting years for wearable tech Android Wear, Apple Watch, Nike FuelBand, Pebble, Jawbone, Fitbit and more Over 720,000 Android Wear devices shipped in 2014 957,000 Apple Watches on the first day of pre-sales More than 1 million Pebble sold since 2013 Big players; Motorola, LG, Samsung, Sony, Asus, Tag Heuer 1201 android-wear tagged questions on StackOverflow; 517 for apple-watch* * data gathered on May the 9th Numbers
  • 4.
    The market isstill young
  • 6.
    What You CanDo Get / Set reminders Track fitness Voice Search Start navigation See weather Control remote media Stay connected!
  • 7.
    Call a car/taxi Takea note Set alarm Set timer Start stopwatch Start/Stop a bike ride Show heart rate Show step count Voice Commands
  • 8.
    Voice Commands Declare yourown app-provided voice actions to start activities “OK Google, start Lovely App” 
 <activity
 android:name=".MainActivity"
 android:label="Lovely App" >
 <intent-filter>
 <action android:name="android.intent.action.MAIN" />
 <category android:name="android.intent.category.LAUNCHER" />
 </intent-filter>
 </activity>

  • 9.
  • 10.
    Do not porta small version of your handheld app
  • 11.
  • 12.
  • 13.
  • 14.
  • 15.
    The Vision Zero orlow interaction
  • 16.
    Design Principles Do notstop user from cooking, eating, walking, running Design for big gestures Think about stream cards first i.e. notifications-instead-of-apps model Do one thing, really fast
  • 17.
  • 18.
  • 22.
  • 23.
  • 24.
  • 25.
  • 26.
    Extending Notifications withWearable Functionality For a better user experience Wearable Only Actions Voice Capabilities Extra Pages
  • 27.
    Android 4.3 (APILevel 18) or higher Android v4 support library (or v13, which includes v4) 400x400 for non-scrolling and 640x400 for parallax scrolling background images in res/drawable-nodpi Other non-bitmap resources in res/drawable-hdpi 
 import android.support.v4.app.NotificationCompat;
 import android.support.v4.app.NotificationManagerCompat;
 import android.support.v4.app.NotificationCompat.WearableExtender;

  • 28.
    Notifications final int notificationId= 1;
 final NotificationCompat.Builder builder = new NotificationCompat.Builder(context)
 .setSmallIcon(R.drawable.ic_notif)
 .setContentTitle("Hello Wearable!")
 .setContentText("Sample text");
 NotificationManagerCompat.from(context).notify(notificationId, builder.build());

  • 29.
    Notifications final int notificationId= 1;
 final NotificationCompat.Builder builder = new NotificationCompat.Builder(context)
 .setSmallIcon(R.drawable.ic_notif)
 .setContentTitle("Hello Wearable!")
 .setContentText("Sample text");
 NotificationManagerCompat.from(context).notify(notificationId, builder.build());

  • 30.
    Notifications final int notificationId= 1;
 final NotificationCompat.Builder builder = new NotificationCompat.Builder(context)
 .setSmallIcon(R.drawable.ic_notif)
 .setContentTitle("Hello Wearable!")
 .setContentText("Sample text");
 NotificationManagerCompat.from(context).notify(notificationId, builder.build());

  • 31.
    Notifications final int notificationId= 1;
 final NotificationCompat.Builder builder = new NotificationCompat.Builder(context)
 .setSmallIcon(R.drawable.ic_notif)
 .setContentTitle("Hello Wearable!")
 .setContentText("Sample text");
 NotificationManagerCompat.from(context).notify(notificationId, builder.build());

  • 32.
    final int notificationId= 1;
 
 final NotificationCompat.Builder builder = new NotificationCompat.Builder(context)
 .setSmallIcon(R.drawable.ic_notif)
 .setContentTitle("Hello Wearable!")
 .setContentText("Sample text")
 .setContentIntent(browserPendingIntent(context))
 .setLargeIcon(BitmapFactory.decodeResource(
 context.getResources(),
 R.drawable.ic_notif_large
 ));
 
 NotificationManagerCompat.from(context).notify(notificationId, builder.build()); Notifications
  • 33.
    final int notificationId= 1;
 
 final NotificationCompat.Builder builder = new NotificationCompat.Builder(context)
 .setSmallIcon(R.drawable.ic_notif)
 .setContentTitle("Hello Wearable!")
 .setContentText("Sample text")
 .setContentIntent(browserPendingIntent(context))
 .setLargeIcon(BitmapFactory.decodeResource(
 context.getResources(),
 R.drawable.ic_notif_large
 ));
 
 NotificationManagerCompat.from(context).notify(notificationId, builder.build()); Notifications
  • 34.
    Extending Notifications :Actions final NotificationCompat.Builder builder = new NotificationCompat.Builder(context)
 .setSmallIcon(R.drawable.ic_notif)
 .setContentTitle("HoverBoard is on sale!")
 .setContentText("Check it out!")
 .setContentIntent(itemDetailsIntent(context))
 .setLargeIcon(BitmapFactory.decodeResource(
 context.getResources(),
 R.drawable.bg_hoverboard2
 ));
 
 // Handheld only actions
 builder.addAction(R.drawable.ic_add_to_cart, "Add to Cart", addToCartIntent(context));
 
 // Wearable-only actions
 final NotificationCompat.WearableExtender wearableExtender = new NotificationCompat.WearableExtender();
 
 wearableExtender.addAction(
 new NotificationCompat.Action(
 R.drawable.ic_navigation, 
 "Start Navigation", 
 navigationIntent(context))
 );
 
 builder.extend(wearableExtender);
  • 35.
    Extending Notifications :Actions final NotificationCompat.Builder builder = new NotificationCompat.Builder(context)
 .setSmallIcon(R.drawable.ic_notif)
 .setContentTitle("HoverBoard is on sale!")
 .setContentText("Check it out!")
 .setContentIntent(itemDetailsIntent(context))
 .setLargeIcon(BitmapFactory.decodeResource(
 context.getResources(),
 R.drawable.bg_hoverboard2
 ));
 
 // Handheld only actions
 builder.addAction(R.drawable.ic_add_to_cart, "Add to Cart", addToCartIntent(context));
 
 // Wearable-only actions
 final NotificationCompat.WearableExtender wearableExtender = new NotificationCompat.WearableExtender();
 
 wearableExtender.addAction(
 new NotificationCompat.Action(
 R.drawable.ic_navigation, 
 "Start Navigation", 
 navigationIntent(context))
 );
 
 builder.extend(wearableExtender);
  • 36.
    Extending Notifications :Actions final NotificationCompat.Builder builder = new NotificationCompat.Builder(context)
 .setSmallIcon(R.drawable.ic_notif)
 .setContentTitle("HoverBoard is on sale!")
 .setContentText("Check it out!")
 .setContentIntent(itemDetailsIntent(context))
 .setLargeIcon(BitmapFactory.decodeResource(
 context.getResources(),
 R.drawable.bg_hoverboard2
 ));
 
 // Handheld only actions
 builder.addAction(R.drawable.ic_add_to_cart, "Add to Cart", addToCartIntent(context));
 
 // Wearable-only actions
 final NotificationCompat.WearableExtender wearableExtender = new NotificationCompat.WearableExtender();
 
 wearableExtender.addAction(
 new NotificationCompat.Action(
 R.drawable.ic_navigation,
 “Nearest Shop",
 navigationIntent(context))
 );
 
 builder.extend(wearableExtender);
  • 37.
    Extending Notifications :Actions final NotificationCompat.Builder builder = new NotificationCompat.Builder(context)
 .setSmallIcon(R.drawable.ic_notif)
 .setContentTitle("HoverBoard is on sale!")
 .setContentText("Check it out!")
 .setContentIntent(itemDetailsIntent(context))
 .setLargeIcon(BitmapFactory.decodeResource(
 context.getResources(),
 R.drawable.bg_hoverboard2
 ));
 
 // Handheld only actions
 builder.addAction(R.drawable.ic_add_to_cart, "Add to Cart", addToCartIntent(context));
 
 // Wearable-only actions
 final NotificationCompat.WearableExtender wearableExtender = new NotificationCompat.WearableExtender();
 
 wearableExtender.addAction(
 new NotificationCompat.Action(
 R.drawable.ic_navigation,
 "Start Navigation",
 navigationIntent(context))
 );
 
 builder.extend(wearableExtender);
  • 38.
    Extending Notifications :Voice Capabilities public static final String EXTRA_VOICE_REPLY = "extra_voice_reply";
 
 final RemoteInput remoteInput = new RemoteInput.Builder(EXTRA_VOICE_REPLY)
 .setLabel("Rate the session")
 .build();
  • 39.
    public static finalString EXTRA_VOICE_REPLY = "extra_voice_reply";
 
 final RemoteInput remoteInput = new RemoteInput.Builder(EXTRA_VOICE_REPLY)
 .setLabel("Rate the session")
 .setChoices(context.getResources().getStringArray(R.array.reply_choices))
 .build(); <string-array name="reply_choices">
 <item>It was alright</item>
 <item>Not so useful</item>
 </string-array> Extending Notifications : Voice Capabilities
  • 40.
    ... final NotificationCompat.Builder builder= new NotificationCompat.Builder(context)
 .setSmallIcon(R.drawable.ic_notif)
 .setContentTitle("Was the session helpful?")
 .setContentIntent(openSessionDetailsIntent(context))
 .setLargeIcon(BitmapFactory.decodeResource(
 context.getResources(),
 R.drawable.bg_gdg
 ));
 
 builder.extend(
 new NotificationCompat.WearableExtender()
 .addAction(
 new NotificationCompat.Action.Builder(
 R.drawable.abc_ic_voice_search_api_mtrl_alpha,
 "Reply",
 openSessionDetailsIntent(context)
 ).addRemoteInput(remoteInput).build()
 ) ); ... Extending Notifications : Voice Capabilities
  • 41.
    ... final NotificationCompat.Builder builder= new NotificationCompat.Builder(context)
 .setSmallIcon(R.drawable.ic_notif)
 .setContentTitle("Was the session helpful?")
 .setContentIntent(openSessionDetailsIntent(context))
 .setLargeIcon(BitmapFactory.decodeResource(
 context.getResources(),
 R.drawable.bg_gdg
 ));
 
 builder.extend(
 new NotificationCompat.WearableExtender()
 .addAction(
 new NotificationCompat.Action.Builder(
 R.drawable.abc_ic_voice_search_api_mtrl_alpha,
 "Reply",
 openSessionDetailsIntent(context)
 ).addRemoteInput(remoteInput).build()
 ) ); ... Extending Notifications : Voice Capabilities
  • 42.
    ... final NotificationCompat.Builder builder= new NotificationCompat.Builder(context)
 .setSmallIcon(R.drawable.ic_notif)
 .setContentTitle("Was the session helpful?")
 .setContentIntent(openSessionDetailsIntent(context))
 .setLargeIcon(BitmapFactory.decodeResource(
 context.getResources(),
 R.drawable.bg_gdg
 ));
 
 builder.extend(
 new NotificationCompat.WearableExtender()
 .addAction(
 new NotificationCompat.Action.Builder(
 R.drawable.abc_ic_voice_search_api_mtrl_alpha,
 "Reply",
 openSessionDetailsIntent(context)
 ).addRemoteInput(remoteInput).build()
 ) ); ... Extending Notifications : Voice Capabilities
  • 43.
    … final NotificationCompat.Builder builder= new NotificationCompat.Builder(context)
 .setSmallIcon(R.drawable.ic_notif)
 .setContentTitle("Was the session helpful?")
 .setContentIntent(openSessionDetailsIntent(context))
 .setLargeIcon(BitmapFactory.decodeResource(
 context.getResources(),
 R.drawable.bg_gdg
 ));
 
 builder.extend(
 new NotificationCompat.WearableExtender()
 .addAction(
 new NotificationCompat.Action.Builder(
 R.drawable.abc_ic_voice_search_api_mtrl_alpha,
 "Reply",
 openSessionDetailsIntent(context)
 ).addRemoteInput(remoteInput).build()
 )
 ); …. Extending Notifications : Voice Capabilities
  • 44.
    Extending Notifications :Pages More information without requiring user to open the app on the handheld final NotificationCompat.Builder builder = new NotificationCompat.Builder(context)
 .setSmallIcon(R.drawable.ic_notif)
 .setContentTitle("New Pancake Recipe!")
 .setContentText("Start making now!")
 .setContentIntent(openRecipeIntent(context))
 .setLargeIcon(BitmapFactory.decodeResource(
 context.getResources(),
 R.drawable.bg_pancakes1
 ));
  • 45.
    Extending Notifications :Pages final Notification secondPage = new NotificationCompat.Builder(context)
 .setContentTitle("Step 1")
 .setContentText(RECIPE_STEP_1)
 .setLargeIcon(BitmapFactory.decodeResource(
 context.getResources(),
 R.drawable.bg_pancakes2
 )).build();
 
 final Notification thirdPage = new NotificationCompat.Builder(context)
 .setContentTitle("Step 2")
 .setContentText(RECIPE_STEP_2)
 .setLargeIcon(BitmapFactory.decodeResource(
 context.getResources(),
 R.drawable.bg_pancakes3
 )).build(); builder.extend(
 new NotificationCompat.WearableExtender()
 .addPage(secondPage)
 .addPage(thirdPage)
 ).build();
  • 46.
    Extending Notifications :Pages final Notification secondPage = new NotificationCompat.Builder(context)
 .setContentTitle("Step 1")
 .setContentText(RECIPE_STEP_1)
 .setLargeIcon(BitmapFactory.decodeResource(
 context.getResources(),
 R.drawable.bg_pancakes2
 )).build();
 
 final Notification thirdPage = new NotificationCompat.Builder(context)
 .setContentTitle("Step 2")
 .setContentText(RECIPE_STEP_2)
 .setLargeIcon(BitmapFactory.decodeResource(
 context.getResources(),
 R.drawable.bg_pancakes3
 )).build();
 
 builder.extend(
 new NotificationCompat.WearableExtender()
 .addPage(secondPage)
 .addPage(thirdPage)
 ).build();
  • 47.
    Extending Notifications :Pages builder.extend(
 new NotificationCompat.WearableExtender()
 .addPage(secondPage)
 .addPage(thirdPage)
 ).build(); final NotificationCompat.Builder builder = new NotificationCompat.Builder(context)
 .setSmallIcon(R.drawable.ic_notif)
 .setContentTitle("New Pancake Recipe!")
 .setContentText("Start making now!")
 .setContentIntent(openRecipeIntent(context))
 .setLargeIcon(BitmapFactory.decodeResource(
 context.getResources(),
 R.drawable.bg_pancakes1
 )); . // second page ... ... . // third page ...
  • 48.
  • 49.
    not possible withnotifications
  • 50.
    Custom Wearable Apps Rundirectly on the device Fundamentally same as apps built for handheld but differ greatly in design and usability Basically activities with custom layouts Access to sensors and GPU Small in size and functionality
  • 51.
    Custom Wearable Apps Differentcode base, no shared resources, different applications Custom notifications issued on the wearable are not synced with handheld When the device goes to sleep, activity gets destroyed No back or home button to exit the app Swiping from the left edge or Long press on the app
  • 52.
    Custom Wearable Apps: Unsupported APIs android.webkit android.print android.app.backup android.appwidget android.hardware.usb
  • 53.
    
 dependencies {
 ...
 compile 'com.google.android.support:wearable:1.1.0'
 compile'com.google.android.gms:play-services-wearable:7.3.0'
 }
 SDK tools 23.0.0 or higher API 20 or higher Enable Debug over Bluetooth on both Wearable and Handheld (Android Wear companion app) adb forward tcp:4444 localabstract:/adb-hub adb connect localhost:4444
  • 54.
    Custom Wearable Apps: Wearable UI Library BoxInsetLayout CardFragment CircledImageView CrossFadeDrawable DelayedConfirmationView DismissOverlayView DotsPageIndicator GridViewPager GridPagerAdapter FragmentGridPagerAdapter WatchViewStub WearableListView
  • 55.
    Custom Wearable Apps: Wearable UI Library CardFragment BoxInsetLayout
  • 56.
    Custom Wearable Apps: Wearable UI Library GridViewPager WearableListView
  • 57.
    Sending and SyncingData Message API Data API Node API to sync data across all Wear devices great for one way communication “fire&forget” to learn about local or connected Nodes
  • 58.
    Sending and SyncingData Channel API send large data or stream data between two or more devices
  • 59.
    Sending and SyncingData Channel API send large data or stream data between two or more devices
  • 60.
    Sending and SyncingData Capability API to learn about capabilities provided by nodes on the Wear network
  • 61.
    Sending and SyncingData : Handheld googleApiClient = new GoogleApiClient.Builder(this)
 .addConnectionCallbacks(this)
 .addOnConnectionFailedListener(this)
 .addApi(Wearable.API)
 .build();
  • 62.
    @Override
 public void onConnected(Bundlebundle) { sendFlightInfo();
 }
 
 @Override
 public void onConnectionSuspended(int cause) {
 ...
 }
 
 @Override
 public void onConnectionFailed(ConnectionResult connectionResult) {
 ...
 } @Override
 protected void onStart() {
 super.onStart();
 googleApiClient.connect();
 }
 
 @Override
 protected void onStop() {
 googleApiClient.disconnect();
 super.onStop();
 } Sending and Syncing Data : Handheld
  • 63.
    @Override
 public void onConnected(Bundlebundle) { sendFlightInfo();
 }
 
 @Override
 public void onConnectionSuspended(int cause) {
 ...
 }
 
 @Override
 public void onConnectionFailed(ConnectionResult connectionResult) {
 ...
 } @Override
 protected void onStart() {
 super.onStart();
 googleApiClient.connect();
 }
 
 @Override
 protected void onStop() {
 googleApiClient.disconnect();
 super.onStop();
 } Sending and Syncing Data : Handheld
  • 64.
    private void sendFlightInfo(){
 
 final PutDataMapRequest request = PutDataMapRequest.create("/add-airlines/flight");
 
 request.getDataMap().putString("from", "SAW");
 request.getDataMap().putString("to", "ESB");
 request.getDataMap().putString("gate", "G22");
 request.getDataMap().putString("barcode", barcodeData);
 
 Wearable.DataApi.putDataItem(googleApiClient, request.asPutDataRequest())
 .setResultCallback(new ResultCallback<DataApi.DataItemResult>() {
 @Override
 public void onResult(DataApi.DataItemResult dataItemResult) {
 
 if (!dataItemResult.getStatus().isSuccess()) {
 // handle error
 }
 }
 });
 
 } Sending and Syncing Data : Handheld
  • 65.
    private void sendFlightInfo(){
 
 final PutDataMapRequest request = PutDataMapRequest.create("/add-airlines/flight");
 
 request.getDataMap().putString("from", "SAW");
 request.getDataMap().putString("to", "ESB");
 request.getDataMap().putString("gate", "G22");
 request.getDataMap().putString("barcode", barcodeData);
 
 Wearable.DataApi.putDataItem(googleApiClient, request.asPutDataRequest())
 .setResultCallback(new ResultCallback<DataApi.DataItemResult>() {
 @Override
 public void onResult(DataApi.DataItemResult dataItemResult) {
 
 if (!dataItemResult.getStatus().isSuccess()) {
 // handle error
 }
 }
 });
 
 } Sending and Syncing Data : Handheld
  • 66.
    private void sendFlightInfo(){
 
 final PutDataMapRequest request = PutDataMapRequest.create("/add-airlines/flight");
 
 request.getDataMap().putString("from", "SAW");
 request.getDataMap().putString("to", "ESB");
 request.getDataMap().putString("gate", "G22");
 request.getDataMap().putString("barcode", barcodeData);
 
 Wearable.DataApi.putDataItem(googleApiClient, request.asPutDataRequest())
 .setResultCallback(new ResultCallback<DataApi.DataItemResult>() {
 @Override
 public void onResult(DataApi.DataItemResult dataItemResult) {
 
 if (!dataItemResult.getStatus().isSuccess()) {
 // handle error
 }
 }
 });
 
 } Sending and Syncing Data : Handheld
  • 67.
    private void sendFlightInfo(){
 
 final PutDataMapRequest request = PutDataMapRequest.create("/add-airlines/flight");
 
 request.getDataMap().putString("from", "SAW");
 request.getDataMap().putString("to", "ESB");
 request.getDataMap().putString("gate", "G22");
 request.getDataMap().putString("barcode", barcodeData);
 
 Wearable.DataApi.putDataItem(googleApiClient, request.asPutDataRequest())
 .setResultCallback(new ResultCallback<DataApi.DataItemResult>() {
 @Override
 public void onResult(DataApi.DataItemResult dataItemResult) {
 
 if (!dataItemResult.getStatus().isSuccess()) {
 // handle error
 }
 }
 });
 
 } Sending and Syncing Data : Handheld
  • 68.
    Sending and SyncingData : Wearable <service android:name=".datalayerapi.DataLayerListenerService">
 <intent-filter>
 <action android:name="com.google.android.gms.wearable.BIND_LISTENER" />
 </intent-filter>
 </service> public class DataLayerListenerService extends WearableListenerService {
 
 @Override
 public void onDataChanged(DataEventBuffer dataEvents) {
 
 for (DataEvent event : dataEvents) {
 
 final DataItem item = event.getDataItem();
 
 if (item.getUri().getPath().compareTo("/add-airlines/flight") == 0) {
 
 DataMap dataMap = DataMapItem.fromDataItem(item).getDataMap();
 
 //raiseLocalBoardingPassNotification(dataMap);
 startBoardingPassActivity(dataMap);
 
 }
 }
 } ...
 
 }

  • 69.
    Sending and SyncingData : Wearable <service android:name=".datalayerapi.DataLayerListenerService">
 <intent-filter>
 <action android:name="com.google.android.gms.wearable.BIND_LISTENER" />
 </intent-filter>
 </service> public class DataLayerListenerService extends WearableListenerService {
 
 @Override
 public void onDataChanged(DataEventBuffer dataEvents) {
 
 for (DataEvent event : dataEvents) {
 
 final DataItem item = event.getDataItem();
 
 if (item.getUri().getPath().compareTo("/add-airlines/flight") == 0) {
 
 DataMap dataMap = DataMapItem.fromDataItem(item).getDataMap();
 
 //raiseLocalBoardingPassNotification(dataMap);
 startBoardingPassActivity(dataMap);
 
 }
 }
 } ...
 
 }

  • 70.
    Sending and SyncingData : Wearable <service android:name=".datalayerapi.DataLayerListenerService">
 <intent-filter>
 <action android:name="com.google.android.gms.wearable.BIND_LISTENER" />
 </intent-filter>
 </service> public class DataLayerListenerService extends WearableListenerService {
 
 @Override
 public void onDataChanged(DataEventBuffer dataEvents) {
 
 for (DataEvent event : dataEvents) {
 
 final DataItem item = event.getDataItem();
 
 if (item.getUri().getPath().compareTo("/add-airlines/flight") == 0) {
 
 DataMap dataMap = DataMapItem.fromDataItem(item).getDataMap();
 
 //raiseLocalBoardingPassNotification(dataMap);
 startBoardingPassActivity(dataMap);
 
 }
 }
 } ...
 
 }

  • 71.
    What’s Next andWhat to Expect? New Google Play Services 7.3 features; Channel API and Capability API WatchFace API More to check on Data Layer APIs and UI library Android Wear 5.1 Update; Wi-Fi support, always-on screen, emojis, gesture controls, new app picker and rapid contacts Google IO 15 Sessions Smarter and personalized device authentication with Smart Lock Simplifying app development using the wearable support library Android Wear: Your app and the always-on screen
  • 72.
  • 73.