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

Declare your own app-provided voice actions to start activities

“OK Google, start Lovely App”

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

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") .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 : Actionsfinal 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 actionsbuilder.addAction(R.drawable.ic_add_to_cart, "Add to Cart", addToCartIntent(context));// Wearable-only actionsfinal NotificationCompat.WearableExtender wearableExtender = new NotificationCompat.WearableExtender();wearableExtender.addAction( new NotificationCompat.Action( R.drawable.ic_navigation, "Start Navigation", navigationIntent(context))); builder.extend(wearableExtender);

Extending Notifications : Actionsfinal 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 actionsbuilder.addAction(R.drawable.ic_add_to_cart, "Add to Cart", addToCartIntent(context)); // Wearable-only actionsfinal NotificationCompat.WearableExtender wearableExtender = new NotificationCompat.WearableExtender();wearableExtender.addAction( new NotificationCompat.Action( R.drawable.ic_navigation, "Start Navigation", navigationIntent(context))); builder.extend(wearableExtender);

Extending Notifications : Actionsfinal 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 actionsbuilder.addAction(R.drawable.ic_add_to_cart, "Add to Cart", addToCartIntent(context));// Wearable-only actionsfinal NotificationCompat.WearableExtender wearableExtender = new NotificationCompat.WearableExtender(); wearableExtender.addAction( new NotificationCompat.Action( R.drawable.ic_navigation, “Nearest Shop", navigationIntent(context))); builder.extend(wearableExtender);

Extending Notifications : Actionsfinal 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 actionsbuilder.addAction(R.drawable.ic_add_to_cart, "Add to Cart", addToCartIntent(context)); // Wearable-only actionsfinal 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>

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() ) );

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() ) );

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 : 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 : Pagesfinal 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 : Pagesfinal 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

CardFragment

BoxInsetLayout

GridViewPager

WearableListView

Sending and Syncing Data

Message API Data API Node APIto sync data

across all Wear devicesgreat for one way communication

“fire&forget”

to learn about local or connected

Channel APIsend large data or

stream data between two or more devices

Channel APIsend large data or

stream data between two or more devices

Capability APIto 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();

@Overridepublic void onConnected(Bundle bundle) { sendFlightInfo();} @Overridepublic void onConnectionSuspended(int cause) {...} @Overridepublic void onConnectionFailed(ConnectionResult connectionResult) {...}

@Overrideprotected void onStart() { super.onStart(); googleApiClient.connect(); } @Overrideprotected void onStop() { googleApiClient.disconnect(); super.onStop(); }

@Overridepublic void onConnected(Bundle bundle) { sendFlightInfo();} @Overridepublic void onConnectionSuspended(int cause) {...} @Overridepublic void onConnectionFailed(ConnectionResult connectionResult) {...}

@Overrideprotected void onStart() { super.onStart(); googleApiClient.connect();} @Overrideprotected void onStop() { googleApiClient.disconnect(); super.onStop();}

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 : Wearable

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 SessionsSmarter and personalized device authentication with Smart LockSimplifying app development using the wearable support libraryAndroid 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/canelmasgithub.com/canelmas

Developing for Android Wear

Software

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