In this session, I will give an overview of Android Wear and how to integrate it in your product strategy. We will look at the underlying design principles and discuss a number of use cases for apps that connect to wearable devices. After that, we will take a look at some code examples and learn how to use the Android Wear SDK.

1. +Peter Friese
@peterfriese
#AndroidWear

4. REAL LIFE
GET
PHONE
LOST IN
PHONE

6. Design Principles

7. Design Principles
• Launched automatically

8. Design Principles
• Launched automatically
• Glanceable

9. Design Principles
• Launched automatically
• Glanceable
• Suggest and Demand

10. Design Principles
• Launched automatically
• Glanceable
• Suggest and Demand
• Zero or low interaction

11. Developing for
Android Wear

12. Simple Notifications
Look, ma - no work required!

13. Simple Notifications
sendNotification()
Intent viewIntent = new Intent(context, DummyActivity.class);
PendingIntent viewPendingIntent = PendingIntent.getActivity(context, 0, viewIntent, 0);
Notification notification = new NotificationCompat.Builder(context)
.setSmallIcon(R.drawable.ic_launcher)
.setSmallIcon(R.drawable.plane)
.setContentTitle(String.format("Flight AW123 is ready to board", notificationId))
.setContentText("Please proceed to gate C 17 to board. Have a nice flight!")
.setContentIntent(viewPendingIntent)
.build();
NotificationManagerCompat notificationManager = NotificationManagerCompat.from(context);
notificationManager.notify(notificationId++, notification);

14. Can we do better?

16. Enhanced Notifications
BigPictureStyle

17. BigPictureStyle
sendNotification()
Intent viewIntent = new Intent(context, DummyActivity.class);
PendingIntent viewPendingIntent = PendingIntent.getActivity(context, 0, viewIntent, 0);
Notification notification = new NotificationCompat.Builder(context)
.setSmallIcon(R.drawable.ic_launcher)
.setSmallIcon(R.drawable.plane)
.setContentTitle(String.format("Flight AW123 is ready to board", notificationId))
.setContentText("Please proceed to gate C 17 to board. Have a nice flight!")
.setStyle(
new NotificationCompat.BigPictureStyle()
.bigPicture(BitmapFactory.decodeResource(context.getResources(),
R.drawable.sanfrancisco))
.setBigContentTitle("Flight AW123 is ready to board.")
.setSummaryText("Please proceed to gate C 17 to board. Have a nice flight!"))
.setContentIntent(viewPendingIntent)
.build();
NotificationManagerCompat notificationManager = NotificationManagerCompat.from(context);
notificationManager.notify(notificationId++, notification);

18. Enhanced Notifications
Pages

19. Pages
sendNotification()
ArrayList<Notification> pages = new ArrayList<Notification>();
pages.add(new NotificationCompat.Builder(context)
.setContentTitle("Your seat")
.setContentText("17A")
.extend(new NotificationCompat.WearableExtender()
.setBackground(BitmapFactory.decodeResource(context.getResources(),
R.drawable.a380_seat)))
.build());

20. Background Only Pages
sendNotification()
pages.add(new NotificationCompat.Builder(context)
.extend(new NotificationCompat.WearableExtender()
.setHintShowBackgroundOnly(true)
.setBackground(BitmapFactory.decodeResource(context.getResources(),
R.drawable.qrcode)))
.build());

21. Adding Pages to Notifications
sendNotification()
Notification notification = new NotificationCompat.Builder(context)
.setSmallIcon(R.drawable.ic_launcher)
.setSmallIcon(R.drawable.plane)
.setContentTitle(String.format("Flight AW123 is ready to board", notificationId))
.setContentText("Please proceed to gate C 17 to board. Have a nice flight!")
.setContentIntent(viewPendingIntent)
.extend(new NotificationCompat.WearableExtender()
.addPages(pages))
.build();
NotificationManagerCompat notificationManager = NotificationManagerCompat.from(context);
notificationManager.notify(notificationId++, notification);

22. Enhanced Notifications
Voice Input

23. Voice Input
sendNotification()
// Feedback intent
Intent replyIntent = new Intent(context, DummyActivity.class);
PendingIntent replyPendingIntent = PendingIntent.getActivity(context, 0, replyIntent, 0);
String replyLabel = context.getResources().getString(R.string.reply_label);
String[] cannedResponses = context.getResources().getStringArray(R.array.canned_responses);
RemoteInput remoteInput = new RemoteInput.Builder(EXTRA_VOICE_REPLY)
.setLabel(replyLabel)
.setChoices(cannedResponses)
.build();
NotificationCompat.Action replyAction =
new NotificationCompat.Action.Builder(
R.drawable.chatbubble_working,
replyLabel,
replyPendingIntent)
.addRemoteInput(remoteInput)
.build();

24. Sending a Voice Input Notification
sendNotification()
Notification notification = new NotificationCompat.Builder(context)
.setSmallIcon(R.drawable.ic_launcher)
.setSmallIcon(R.drawable.plane)
.setContentTitle(String.format("Flight AW123 is ready to board", notificationId))
.setContentText("Please proceed to gate C 17 to board. Have a nice flight!")
.extend(new NotificationCompat.WearableExtender()
.addPages(pages)
.addAction(replyAction))
.build();
NotificationManagerCompat notificationManager = NotificationManagerCompat.from(context);
notificationManager.notify(notificationId++, notification);

25. Receiving Voice Input
onCreate()
Bundle remoteInputResults = RemoteInput.getResultsFromIntent(intent);
if (remoteInputResults != null) {
CharSequence utterance = remoteInputResults.getCharSequence(Constants.EXTRA_VOICE_REPLY);
Toast.makeText(this, utterance, Toast.LENGTH_LONG).show();
}

26. Enhanced Notifications
Actions

27. Actions
sendNotification()
Intent mapIntent = new Intent(Intent.ACTION_VIEW);
Uri geoUri = Uri.parse("geo:0,0?q=" + Uri.encode("London Heathrow"));
mapIntent.setData(geoUri);
PendingIntent mapPendingIntent = PendingIntent.getActivity(context, 0, mapIntent, 0);
NotificationCompat.Action walkingDirectionsAction =
new NotificationCompat.Action.Builder(
R.drawable.ic_full_directions_walking, "Directions to gate", mapPendingIntent)
.build();
!
Notification notification = new NotificationCompat.Builder(context)
.setSmallIcon(R.drawable.ic_launcher)
.setSmallIcon(R.drawable.plane)
.setContentTitle(String.format("Flight AW123 is ready to board", notificationId))
.setContentText("Please proceed to gate C 17 to board. Have a nice flight!")
.addAction(walkingDirectionsAction)
.extend(new NotificationCompat.WearableExtender()
.addPages(pages)
.addAction(replyAction)
.addAction(walkingDirectionsAction))
.build();

28. Wearable apps
Launching
Using app-provided
voice actions
Using the start
menu

29. Launching
AndroidManifest.xml
<application
android:icon="@drawable/greenlinelogo"
android:label="@string/app_name"
android:theme="@android:style/Theme.DeviceDefault" >
<activity
android:name="de.peterfriese.weartravel.MainActivity"
android:label="@string/app_name_voice" >
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
</application>

30. Wearable Apps
Custom Layouts

31. Layout - List
activity_checkin.xml
<android.support.wearable.view.BoxInsetLayout
xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto"
android:layout_height="match_parent"
android:layout_width="match_parent">
<FrameLayout
android:id="@+id/frame_layout"
android:layout_height="match_parent"
android:layout_width="match_parent"
app:layout_box="left|bottom|right">
<android.support.wearable.view.WearableListView
android:id="@+id/checkin_list"
android:layout_height="match_parent"
android:layout_width="match_parent">
</android.support.wearable.view.WearableListView>
</FrameLayout>
</android.support.wearable.view.BoxInsetLayout>

32. Layout - Item
checkin_listview_item.xml
<?xml version="1.0" encoding="utf-8"?>
<merge xmlns:android="http://schemas.android.com/apk/res/android"
xmlns:app="http://schemas.android.com/apk/res-auto">
<android.support.wearable.view.CircledImageView
android:id="@+id/image"
android:alpha="0.5"
android:layout_height="52dp"
android:layout_marginLeft="16dp"
android:layout_width="52dp"
app:circle_border_color="#FFFFFFFF"
app:circle_border_width="2dp"
app:circle_color="#00000000"
/>
<TextView
android:id="@+id/text"
android:alpha="0.5"
android:fontFamily="sans-serif-condensed-light"
android:gravity="center_vertical"
android:layout_height="52dp"
android:layout_marginLeft="72dp"
android:layout_marginRight="16dp"

33. <?xml version="1.0" encoding="utf-8"?>
<merge xmlns:android="http://schemas.android.com/apk/res/android"
Layout - Item
checkin_listview_item.xml
xmlns:app="http://schemas.android.com/apk/res-auto">
<android.support.wearable.view.CircledImageView
android:id="@+id/image"
android:alpha="0.5"
android:layout_height="52dp"
android:layout_marginLeft="16dp"
android:layout_width="52dp"
app:circle_border_color="#FFFFFFFF"
app:circle_border_width="2dp"
app:circle_color="#00000000"
/>
<TextView
android:id="@+id/text"
android:alpha="0.5"
android:fontFamily="sans-serif-condensed-light"
android:gravity="center_vertical"
android:layout_height="52dp"
android:layout_marginLeft="72dp"
android:layout_marginRight="16dp"
android:layout_width="wrap_content"
android:textColor="@color/white"
android:textSize="14sp"
/>
</merge>

34. MyViewItem
CheckInActivity.java
private final class MyItemView extends FrameLayout implements WearableListView.Item {
final CircledImageView image;
final TextView text;
private float mScale;
public MyItemView(Context context) {
super(context);
View.inflate(context, R.layout.checkin_listview_item, this);
image = (CircledImageView) findViewById(R.id.image);
text = (TextView) findViewById(R.id.text);
}
@Override
public float getProximityMinValue() {
return mDefaultCircleRadius;
}
@Override
public float getProximityMaxValue() {
return mSelectedCircleRadius;
}

35. private float mScale;
public MyItemView(Context context) {
MyViewItem
super(context);
View.inflate(context, R.layout.checkin_listview_item, this);
image = (CircledImageView) findViewById(R.id.image);
text = (TextView) findViewById(R.id.text);
CheckInActivity.java
}
@Override
public float getProximityMinValue() {
return mDefaultCircleRadius;
}
@Override
public float getProximityMaxValue() {
return mSelectedCircleRadius;
}
@Override
public float getCurrentProximityValue() {
return mScale;
}
@Override
public void setScalingAnimatorValue(float value) {
mScale = value;
image.setCircleRadius(mScale);
image.setCircleRadiusPressed(mScale);
}
@Override

36. @Override
public float getProximityMaxValue() {
MyViewItem
return mSelectedCircleRadius;
}
@Override
public float getCurrentProximityValue() {
CheckInActivity.java
return mScale;
}
@Override
public void setScalingAnimatorValue(float value) {
mScale = value;
image.setCircleRadius(mScale);
image.setCircleRadiusPressed(mScale);
}
@Override
public void onScaleUpStart() {
image.setAlpha(1f);
text.setAlpha(1f);
}
@Override
public void onScaleDownStart() {
image.setAlpha(0.5f);
text.setAlpha(0.5f);
}
}

37. Adapter - Bind ViewHolder
CheckInActivity.java
public class MyListAdapter extends WearableListView.Adapter {
@Override
public WearableListView.ViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
return new WearableListView.ViewHolder(new MyItemView(CheckInActivity.this));
}
@Override
public void onBindViewHolder(WearableListView.ViewHolder viewHolder, int i) {
MyItemView myItemView = (MyItemView) viewHolder.itemView;
TextView textView = (TextView) myItemView.findViewById(R.id.text);
textView.setText(String.format("Seat %d", i));
Integer resourceId = R.drawable.ic_action_done;
CircledImageView imageView = (CircledImageView) myItemView.findViewById(R.id.image);
imageView.setImageResource(resourceId);
}
@Override
public int getItemCount() {
return 17;
}

38. Adapter - Bind ViewHolder
public class MyListAdapter extends WearableListView.Adapter {
CheckInActivity.java
@Override
public WearableListView.ViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) {
return new WearableListView.ViewHolder(new MyItemView(CheckInActivity.this));
}
@Override
public void onBindViewHolder(WearableListView.ViewHolder viewHolder, int i) {
MyItemView myItemView = (MyItemView) viewHolder.itemView;
TextView textView = (TextView) myItemView.findViewById(R.id.text);
textView.setText(String.format("Seat %d", i));
Integer resourceId = R.drawable.ic_action_done;
CircledImageView imageView = (CircledImageView) myItemView.findViewById(R.id.image);
imageView.setImageResource(resourceId);
}
@Override
public int getItemCount() {
return 17;
}
}

39. Activity
CheckInActivity.java
public class CheckInActivity extends Activity implements WearableListView.ClickListener {
private WearableListView mListView;
private MyListAdapter mAdapter;
private float mDefaultCircleRadius;
private float mSelectedCircleRadius;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_checkin);
mDefaultCircleRadius =
getResources().getDimension(R.dimen.default_settings_circle_radius);
mSelectedCircleRadius =
getResources().getDimension(R.dimen.selected_settings_circle_radius);
mAdapter = new MyListAdapter();
mListView = (WearableListView) findViewById(R.id.checkin_list);
mListView.setAdapter(mAdapter);
mListView.setClickListener(CheckInActivity.this);
}

40. private float mDefaultCircleRadius;
private float mSelectedCircleRadius;
@Override
protected void onCreate(Bundle savedInstanceState) {
Activity
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_checkin);
mDefaultCircleRadius =
CheckInActivity.java
getResources().getDimension(R.dimen.default_settings_circle_radius);
mSelectedCircleRadius =
getResources().getDimension(R.dimen.selected_settings_circle_radius);
mAdapter = new MyListAdapter();
mListView = (WearableListView) findViewById(R.id.checkin_list);
mListView.setAdapter(mAdapter);
mListView.setClickListener(CheckInActivity.this);
}
@Override
public void onClick(WearableListView.ViewHolder viewHolder) {
Toast.makeText(this, String.format("You selected item #%s”,
viewHolder.getPosition()), Toast.LENGTH_SHORT).show();
}
@Override
public void onTopEmptyRegionClick() {
Toast.makeText(this, "You tapped into the empty area above the list”,
Toast.LENGTH_SHORT).show();
}

41. Data Layer
Performing a Check-In on Your Watch

42. Transferring Assets
sendDataToWearable()
final ByteArrayOutputStream byteStream = new ByteArrayOutputStream();
bitmap.compress(Bitmap.CompressFormat.PNG, 100, byteStream);
Asset asset = Asset.createFromBytes(byteStream.toByteArray());
PutDataMapRequest dataMap =
PutDataMapRequest.create(Constants.FLIGHT_PATH + "/" + Uri.encode("SFO"));
dataMap.getDataMap().putString(Constants.EXTRA_FLIGHTNUMBER, "AC123");
dataMap.getDataMap().putString(Constants.EXTRA_GATE, "C 17");
dataMap.getDataMap().putAsset(Constants.EXTRA_DESTINATION, imageAssetDestination);
PutDataRequest request = dataMap.asPutDataRequest();
// Send the data over
DataApi.DataItemResult result =
Wearable.DataApi.putDataItem(googleApiClient, request).await();

43. Sending Messages
sendDataToWearable()
// If successful store the data path
// Construct an array of all successfully sent data paths
DataMap itemPathMap = new DataMap();
itemPathMap.putString(Constants.EXTRA_UPDATED_FLIGHTS,
result.getDataItem().getUri().toString());
// Convert to bytes to be send with the message
byte[] dataMapBytes = itemPathMap.toByteArray();

44. Sending Messages
sendDataToWearable()
// If successful store the data path
// Construct an array of all successfully sent data paths
DataMap itemPathMap = new DataMap();
itemPathMap.putString(Constants.EXTRA_UPDATED_FLIGHTS,
result.getDataItem().getUri().toString());
// Convert to bytes to be send with the message
byte[] dataMapBytes = itemPathMap.toByteArray();
Iterator<String> itr = Utilities.getNodes(googleApiClient).iterator();
while (itr.hasNext()) {
// Notify all nodes to "start", providing the data paths of all
// transmitted tourist attractions. What "start" does will be up
// to the wearable.
!
}

45. Sending Messages
sendDataToWearable()
// If successful store the data path
// Construct an array of all successfully sent data paths
DataMap itemPathMap = new DataMap();
itemPathMap.putString(Constants.EXTRA_UPDATED_FLIGHTS,
result.getDataItem().getUri().toString());
// Convert to bytes to be send with the message
byte[] dataMapBytes = itemPathMap.toByteArray();
Iterator<String> itr = Utilities.getNodes(googleApiClient).iterator();
while (itr.hasNext()) {
// Notify all nodes to "start", providing the data paths of all
// transmitted tourist attractions. What "start" does will be up
// to the wearable.
Wearable.MessageApi.sendMessage(googleApiClient, itr.next(),
Constants.START_PATH, dataMapBytes);
}

46. Receiving Data
AndroidManifest.xml (wearable)
<service
android:name="de.peterfriese.weartravel.ListenerService">
<intent-filter>
<action android:name="com.google.android.gms.wearable.BIND_LISTENER" />
</intent-filter>
</service>

47. Receiving Data
ListenerService.java
public class ListenerService extends WearableListenerService {
@Override
public void onDataChanged(DataEventBuffer dataEvents) {
Log.d(TAG, "onDataChanged: " + dataEvents);
final List<DataEvent> events = FreezableUtils.freezeIterable(dataEvents);
for (DataEvent event : events) {
if (event.getType() == DataEvent.TYPE_CHANGED) {
// Not doing anything here but logging
Uri uri = event.getDataItem().getUri();
DataMapItem dataMapItem = DataMapItem.fromDataItem(event.getDataItem());
String title = dataMapItem.getDataMap().getString("extra_flightnumber");
Log.v(TAG, "Data changed: " + uri + ", " + title);
}
}
}
@Override
public void onMessageReceived(MessageEvent messageEvent) {
Log.v(TAG, "onMessageReceived: " + messageEvent);

48. if (event.getType() == DataEvent.TYPE_CHANGED) {
// Not doing anything here but logging
Uri uri = event.getDataItem().getUri();
DataMapItem dataMapItem = DataMapItem.fromDataItem(event.getDataItem());
String title = dataMapItem.getDataMap().getString("extra_flightnumber");
Log.v(TAG, "Data changed: " + uri + ", " + title);
Receiving Data
}
ListenerService.}
java
}
@Override
public void onMessageReceived(MessageEvent messageEvent) {
Log.v(TAG, "onMessageReceived: " + messageEvent);
if (Constants.START_PATH.equals(messageEvent.getPath())) {
DataMap dataMap = DataMap.fromByteArray(messageEvent.getData());
GoogleApiClient googleApiClient = new GoogleApiClient.Builder(this)
.addApi(Wearable.API)
.build();
ConnectionResult connectionResult = googleApiClient.blockingConnect(
Constants.GOOGLE_API_CLIENT_TIMEOUT, TimeUnit.SECONDS);
if (!connectionResult.isSuccess() || !googleApiClient.isConnected()) {
Log.e(TAG, Constants.GOOGLE_API_CLIENT_ERROR_MSG);
return;
}
String flightUri = dataMap.getString(Constants.EXTRA_UPDATED_FLIGHTS);

49. ConnectionResult connectionResult = googleApiClient.blockingConnect(
Constants.GOOGLE_API_CLIENT_TIMEOUT, TimeUnit.SECONDS);
Receiving Data
if (!connectionResult.isSuccess() || !googleApiClient.isConnected()) {
Log.e(TAG, Constants.GOOGLE_API_CLIENT_ERROR_MSG);
return;
}
String flightUri = dataMap.getString(Constants.EXTRA_UPDATED_FLIGHTS);
Uri uri = Uri.parse(flightUri);
DataApi.DataItemResult dataItemResult =
ListenerService.java
Wearable.DataApi.getDataItem(googleApiClient, uri).await();
DataItem dataItem = dataItemResult.getDataItem();
if (dataItem != null) {
DataMap flightDataMap =
DataMapItem.fromDataItem(dataItem).getDataMap();
String flightNumber = flightDataMap.getString(Constants.EXTRA_FLIGHTNUMBER);
String gate = flightDataMap.getString(Constants.EXTRA_GATE);
Bitmap destinationBitmap = Utilities.loadBitmapFromAsset(
googleApiClient,
flightDataMap.getAsset(Constants.EXTRA_DESTINATION));
sendNotification(flightNumber, gate, destinationBitmap);
}
googleApiClient.disconnect();
}
}

50. Demo

51. Thank you!
+PeterFriese
@
#AndroidWear

52. Q & A
+PeterFriese
@
#AndroidWear