Download to read offline
Uploaded byUA Mobile
Google Wear OS watch faces and applications development - UA Mobile 2019
The document discusses the development of watch faces and applications for Google's Wear OS, highlighting various features and technical specifications such as screen dimensions, service types for custom watch faces, and application architectures. It explains the importance of burn-in protection for OLED screens, the functionalities of standalone apps, and the integration of connected applications with mobile devices. Additionally, it notes the limitations of the Wear OS and the support available for different operating systems.
Google Wear OS watch faces and applications development - UA Mobile 2019
- 1. Google Wear OSwatch faces and applications development Oleksandr Stepanov Mobile Lead @ AKQA
- 2.
- 3.
- 4. Wear OS (ex AndroidWear)
- 5. Wear OS devices •40+ model of watches in sale • 200+ watches released so far • 6000+ number of Wear OS apps in Play Store
- 6. Screen dimensions • 240x240… 480x480 • 400x400 - 24% • 390x390 - 20% • Better to use Vector, e.g. SVG
- 7.
- 8. Application type Standalone appsWatch face
- 9.
- 10.
- 11. Custom watch face •class CustomWatchFaceService: CanvasWatchFaceService() • inner class Engine : CanvasWatchFaceService.Engine() • Override: • onCreate(…) • onPropertiesChanged(…) • onTimeTick() • onAmbientModeChanged(…) • onDraw(…) • onVisibilityChanged(visible: Boolean)
- 12. Custom watch face <service android:name=".AnalogWatchFaceService" android:label="@string/analog_name" android:permission="android.permission.BIND_WALLPAPER"> <meta-data android:name="android.service.wallpaper" android:resource="@xml/watch_face" /> <meta-data android:name="com.google.android.wearable.watchface.preview" android:resource="@drawable/preview_analog" /> <meta-data android:name="com.google.android.wearable.watchface.preview_circular" android:resource="@drawable/preview_analog_circular" /> <intent-filter> <action android:name="android.service.wallpaper.WallpaperService" /> <category android:name= "com.google.android.wearable.watchface.category.WATCH_FACE" /> </intent-filter> </service>
- 13.
- 14.
- 15.
- 16. Proper Architecture • MVVMor MVP • RxJava/RxKotlin • Architecture Components not available • Custom technical design
- 18.
- 19.
- 20. Standalone apps <manifest> ... <uses-feature android:name="android.hardware.type.watch"/> ... <application> ... <meta-data android:name="com.google.android.wearable.standalone" android:value="true" /> ... </application> </manifest>
- 21. Standalone apps • classCustomWearableActivity: WearableActivity() • Standard Activity lifecycle • Ambient mode addition • boolean isAmbient() • void onEnterAmbient(Bundle ambientDetails) • void onExitAmbient() • void onUpdateAmbient() • void setAmbientEnabled()
- 22.
- 23. Ambient mode Burn-in protection •OLED and AMOLED screens • EXTRA_BURN_IN_PROTECTION flag in onEnterAmbient(…) • Avoid having solid blobs 16x16 size in ambient • Avoid placing elements or frame on the edge
- 24.
- 25. Low-bit Ambient mode •EXTRA_LOWBIT_AMBIENT flag in onEnterAmbient(…) • When on, only few colors available in ambient mode • Anti-aliasing must be disabled
- 26. Connected app on handheld phoneor tablet
- 27. Wear OS appon phone • Wear OS watch must be paired with phone • Pairing happens through Wear OS app • Android & iOS versions available • Watch is connected via BLE
- 28. Connected app • Applicationsshares package name • Distributed in one app on Play Store • … but in separate APKs • Play Store on the watch and phone downloads own package.
- 29. Connected app API •Data Layer API • DataClient • DataMap <—> DataMapItem <—> DataItem • MessageClient • Only for connected nodes • <100k of data • ChannelClient • Transfer data using streams • Media data
- 30.
- 31. Handheld statistic 2 outof 3 1 out of 3
- 32. iOS Connected appAPI Data Layer API
- 33.
- 34. iOS Connected appAPI Central Peripheral
- 35. iOS Connected appAPI • BLE 4.0 Services & Characteristics (GATT) • BLE 4.1 L2CAP Connection-oriented Channels ✓ iOS since 11 version – Android announced in Q
- 36.
- 37. iOS Connected appAPI • Firestore Database • Realtime Database • Cloud Storage • Cloud Messaging (push notifications)
- 38.
- 39.
- 40.
- 41. Wear OS LE ⛔Google Play Store ‣ Huawei and Mobvoi ⛔ Firebase ⛔ Google Authentication ⛔ Google Play Services version 10.2.0
- 42. Wear OS LE •Wearable API via GoogleApiClient • Data Layer API • FusedLocationProvider • Google Fit limited support
- 43.