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Android Builders Weblog: What’s new in Put on OS

Kseniia Shumelchyk, Android Developer Relations Engineer, and Garan Jenkin, Android Developer Relations Engineer

Put on OS has seen unimaginable progress and developments over the previous 12 months. With watch launches from Pixel, Samsung and extra, Put on OS grew its person base by 40% in 2023 and has customers in over 160 international locations and areas. And Put on OS has expanded to extra manufacturers together with OnePlus, OPPO and Xiaomi. This progress has been accompanied by heavy investments in efficiency and energy optimization.

On this weblog publish, we’ll be highlighting among the key updates we introduced at Google I/O this 12 months, so let’s dive in and discover the newest developments in Put on OS and how one can take advantage of the platform.

Put on OS 5 Developer Preview

We’re excited to be releasing the Developer Preview of Put on OS 5, the subsequent model of Google’s smartwatch platform arriving later this 12 months, primarily based on Android 14. Central to our launch of Put on OS 5 is continuous to reinforce battery life.

Put on OS 5 brings efficiency enhancements over Put on OS 4. Monitoring your exercise is now extra environment friendly; for instance, operating a marathon consumes as much as 20% much less energy on Put on OS 5 than on Put on OS 4.

Wear OS 5 brings battery improvements over Wear OS 4 for longer work out tracking

Put on OS 5 brings battery enhancements over Put on OS 4 for longer work out monitoring

That will help you develop power-efficient apps on Put on OS, we’ve launched a new information to preserve energy and battery. Be certain to have a look!

Put on OS 5 is predicated on Android 14, which brings with it a lot of developer-facing modifications. Try what’s modified and take a look at the brand new Put on OS 5 emulator to check your app for compatibility with the brand new platform model.

Modifications in Watch Faces growth

Final 12 months we launched the Watch Face Format as a part of Put on OS 4, and we’ve had a incredible response, with 30% of watch faces in Google Play already utilizing the format. It’s been nice to see what you’ve all been in a position to create to this point utilizing the Watch Face Format!

Sample Watch faces created with Watch Face Format

Pattern Watch faces created with Watch Face Format

We’re excited to carry you the subsequent iteration of the Watch Face Format with Put on OS 5.

Moreover, we’re asserting some modifications to current watch face growth utilizing Jetpack Watch Face APIs. Ranging from Put on OS 5, we’re introducing restrictions to issues for watch faces constructed with AndroidX or the Wearable Assist Library that may apply to some knowledge sources, in addition to Google Play publishing limitations to new watch faces constructed with these libraries.

Try the Watch Faces weblog publish for full particulars on the brand new options in Watch Face Format and modifications to look at faces growth choices.

Tooling and library updates

Jetpack Compose for Put on OS

Adoption of Compose on Put on OS has grown 200% previously 12 months, highlighting the benefit with which Compose permits builders to construct for the watch type issue. Not too long ago we’ve seen prime apps reminiscent of WhatsApp, Gmail and Google Calendar constructed solely utilizing Compose for Put on OS, and it’s the really helpful method for constructing person interfaces for Put on OS apps.

With the 1.3 launch of Jetpack Compose for Put on OS, we’ve graduated a lot of visible enhancements and fixes from beta to steady.

Prior to now 12 months, we’ve added options reminiscent of SwipeToReveal, to provide customers further means for finishing actions, an expandable merchandise, to reinforce using the smaller display screen and present further info the place wanted, and a spread of WearPreview supporting annotations, for making certain your app works optimally throughout the vary of system sizes and font scales.

Compose for Wear OS previews usage in Android Studio

Compose for Put on OS previews utilization in Android Studio

And at Google I/O 2024, we introduced a whole lot of new updates with Jetpack Compose that show you how to construct throughout type components, together with Put on OS, learn extra in this weblog and take a look at how SoundCloud supported extra screens utilizing 45% much less code with Jetpack Compose.

Tiles and ProtoLayout

Put on OS tiles give customers quick, predictable entry to the data and actions they depend on most. Model 1.4 of the Jetpack Tiles library, at present in alpha, introduces preview assist for Android Studio that can assist you shortly iterate in your Tile growth whereas additionally serving to you create optimal-looking tiles on a spread of show sizes.

Previews may be seen beginning in Android Studio Koala Characteristic Drop (Canary), with the next dependencies:

    • androidx.put on.tiles:tiles-tooling-preview:1.4.0-alpha02+
    • androidx.put on.tiles:tiles-tooling:1.4.0-alpha02+
    • androidx.put on:wear-tooling-preview:1.0.0+
@Preview(system = WearDevices.SMALL_ROUND)
enjoyable smallPreview(context: Context) = TilePreviewData(
    onTileRequest = { request ->

Tiles previews usage in Android Studio

Tiles previews utilization in Android Studio

We’ve additionally launched higher means in your app to find out whether or not your tiles are in use, via the getActiveTilesAsync() methodology.

Inside ProtoLayout’s steady model 1.1, as utilized by Tiles, we’ve launched a lot of modifications, reminiscent of the next:

    • Gradient assist in ArcLine.
    • Date-time formatting helps completely different time zones for dynamic knowledge varieties.
    • Higher textual content autosizing and ellipsizing choices, and constant font padding conduct.
    • Expandable spacers
    • Improved accessibility for Clickable components

And from 1.2.0-alpha02, we’ve made it simpler in your layouts to regulate appropriately for various show sizes by including the setResponsiveContentInsetEnabled() methodology to PrimaryLayout, in addition to updating it for EdgeContentLayout. To make use of this setter, replace your code as follows:

        // ...

Simpler testing for health apps

Android Studio Koala Characteristic Drop (Canary) brings a brand new sensor panel to make it simpler to check use of Well being Providers in your Put on OS app. The panel permits you to configure capabilities of the system, set values of particular knowledge varieties and stimulate occasions reminiscent of auto-pause and resume of workout routines.

Sensor panel usage with Wear OS emulator in Android Studio

Sensor panel utilization with Put on OS emulator in Android Studio

Try this weblog to study extra about tooling updates.

Bigger Shows

With the momentum surrounding Put on OS, we’re seeing a greater diversity of spherical display screen sizes and resolutions, which gives extra selections for the person.

We’re releasing new tips on tips on how to construct responsive UIs for various watch show sizes, in addition to updates to current libraries to introduce adaptive layouts, and parts.

Try the ComposeStarter pattern for Put on OS on Github to see tips on how to reap the benefits of these updates in your app. Moreover, we’ve up to date the pattern to supply examples of utilizing instruments to judge your layouts, together with :

    • Previews – demonstrating use of WearPreviewDevices to visualise your layouts on a full vary of system sizes and font scaling settings.
    • Screenshot testing – serving to you detect points and regressions in your layouts on completely different sized gadgets, with completely different font scales and locales, consultant of real-world gadgets.

Begin constructing for Put on OS now

There has by no means been a greater time to start out constructing for Put on OS! You’ll want to take a look at Constructing for the way forward for Put on OS technical session to study extra about all the newest updates for Put on OS!

To get began:

We’re wanting ahead to seeing the experiences that you just construct on Put on OS!



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