Tag Archives: Tablets

13 Things to know for Android developers at Google I/O!

Posted by Maru Ahues Bouza, Director of Android Developer Relations

Android I/O updates: Jetpack, Wear OS, etc 

There aren’t many platforms where you can build something and instantly reach billions of people around the world, not only on their phones—but their TVs, cars, tablets, watches, and more. Today, at Google I/O, we covered a number of ways Android helps you make the most of this opportunity, and how Modern Android Development brings as much commonality as possible, to make it faster and easier for you to create experiences that tailor to all the different screens we use in our daily lives.

We’ve rounded up the top 13 things to know for Android developers—from Jetpack Compose to tablets to Wear OS and of course… Android 13! And stick around for Day 2 of Google I/O, when Android’s full track of 26 technical talks and 4 workshops drop. We’re also bringing back the Android fireside Q&A in another episode of #TheAndroidShow; tweet us your questions now using #AskAndroid, and we’ve assembled a team of experts to answer live on-air, May 12 at 12:30PM PT.


MODERN ANDROID DEVELOPMENT

#1: Jetpack Compose Beta 1.2, with support for more advanced use cases

Android’s modern UI toolkit, Jetpack Compose, continues to bring the APIs you need to support more advanced use cases like downloadable fonts, LazyGrids, window insets, nested scrolling interop and more tooling support with features like LiveEdit, Recomposition Debugging and Animation Preview. Check out the blog post for more details.

Jetpack Compose 1.2 Beta  

#2: Android Studio: introducing Live Edit

Get more done faster with Android Studio Dolphin Beta and Electric Eel Canary! Android Studio Dolphin includes new features and improvements for Jetpack Compose and Wear OS development and an updated Logcat experience. Android Studio Electric Eel comes with integrations with the new Google Play SDK Index and Firebase Crashlytics. It also offers a new resizable emulator to test your app on large screens and the new Live Edit feature to immediately deploy code changes made within composable functions. Watch the What’s new in Android Development Tools session and read the Android Studio I/O blog post here.

#3: Baseline Profiles - speed up your app load time!

The speed of your app right after installation can make a big difference on user retention. To improve that experience, we created Baseline Profiles. Baseline Profiles allow apps and libraries to provide the Android runtime with metadata about code path usage, which it uses to prioritize ahead-of-time compilation. We've seen up to 30% faster app startup times thanks to adding baseline profiles alone, no other code changes required! We’re already using baseline profiles within Jetpack: we’ve added baselines to popular libraries like Fragments and Compose – to help provide a better end-user experience. Watch the What’s new in app performance talk, and read the Jetpack blog post here.

Modern Android Development 

BETTER TOGETHER

#4: Going big on Android tablets

Google is all in on tablets. Since last I/O we launched Android 12L, a release focused on large screen optimizations, and Android 13 includes all those improvements and more. We also announced the Pixel tablet, coming next year. With amazing new hardware, an updated operating system & Google apps, improved guidelines and libraries, and exciting changes to the Play store, there has never been a better time to review your apps and get them ready for large screens and Android 13. That’s why at this year’s I/O we have four talks and a workshop to take you from design to implementation for large screens.


#5: Wear OS: Compose + more!

With the latest updates to Wear OS, you can rethink what is possible when developing for wearables. Jetpack Compose for Wear OS is now in beta, so you can create beautiful Wear OS apps with fewer lines of code. Health Services is also now in beta, bringing a ton of innovation to the health and fitness developer community. And last, but certainly not least, we announced the launch of The Google Pixel Watch - coming this Fall - which brings together the best of Fitbit and Wear OS. You can learn more about all the most exciting updates for wearables by watching the Wear OS technical session and reading our Jetpack Compose for Wear OS announcement.

Compose for Wear OS 

#6: Introducing Health Connect

Health Connect is a new platform built in close collaboration between Google and Samsung, that simplifies connectivity between apps making it easier to reach more users with less work, so you can securely access and share user health and fitness data across apps and devices. Today, we’re opening up access to Health Connect through Jetpack Health—read our announcement or watch the I/O session to find out more!

#7: Android for Cars & Android TV OS

Android for Cars and Android TV OS continue to grow in the US and abroad. As more users drive connected or tune-in, we’re introducing new features to make it even easier to develop apps for cars and TV this year. Catch the “What’s new with Android for Cars” and “What's new with Google TV and Android TV” sessions on Day 2 (May 12th) at 9:00 AM PT to learn more.

#8: Add Voice Across Devices

We’re making it easier for users to access your apps via voice across devices with Google Assistant, by expanding developer access to Shortcuts API for Android for Cars, with support for Wear OS apps coming later this year. We’re also making it easier to build those experiences with Smarter Custom Intents, enabling Assistant to better detect broader instances of user queries through ML, without any NLU training heavy lift. Additionally, we’re introducing improvements that drive discovery to your apps via voice on Mobile, first through Brandless Queries, that drive app usage even when the user hasn’t explicitly said your app’s name, and App Install Suggestions that appear if your isn’t installed yet–these are automatically enabled for existing App Actions today.


AND THE LATEST FROM ANDROID, PLAY, AND MORE:

#9: What’s new in Play!

Get the latest updates from Google Play, including new ways Play can help you grow your business. Highlights include the ability to deep-link and create up to 50 custom listings; our LiveOps beta, which will allow more developers to submit content to be considered for featuring on the Play Store; and even more flexibility in selling subscriptions. Learn about these updates and more in our blog post.

#10: Google Play SDK Index

Evaluate if an SDK is right for your app with the new Google Play SDK index. This new public portal lists over 100 of the most widely used commercial SDKs and information like which app permissions the SDK requests, statistics on the apps that use them, and which version of the SDK is most popular. Learn more on our blog post and watch “What’s new in Google Play” and “What’s new in Android development tools” sessions.

#11: Privacy Sandbox on Android

Privacy Sandbox on Android provides a path for new advertising solutions to improve user privacy without putting access to free content and services at risk. We recently released the first Privacy Sandbox on Android Developer Preview so you can get an early look at the SDK Runtime and Topics API. You can conduct preliminary testing of these new technologies, evaluate how you might adopt them for your solutions, and share feedback with us.

#12: The new Google Wallet API

The new Google Wallet gives users fast and secure access to everyday essentials across Android and Wear OS. We’re enhancing the Google Wallet API, previously called Google Pay Passes API, to support generic passes, grouping and mixing passes together, for example grouping an event ticket with a voucher, and launching a new Android SDK which allows you to save passes directly from your app without a backend integration. To learn more, read the full blog post, watch the session, or read the docs at developers.google.com/wallet.

#13: And of course, Android 13!

The second Beta of Android 13 is available today! Get your apps ready for the latest features for privacy and security, like the new notification permission, the privacy-protecting photo picker, and improved permissions for pairing with nearby devices and accessing media files. Enhance your app with features like app-specific language support and themed app icons. Build with modern standards like HDR video and Bluetooth LE Audio. You can get started by enrolling your Pixel device here, or try Android 13 Beta on select phones, tablets, and foldables from our partners - visit developer.android.com/13 to learn more.

That’s just a snapshot of some of the highlights for Android developers at this year’s Google I/O. Be sure to watch the What’s New in Android talk to get the landscape on the full Android technical track at Google I/O, which includes 26 talks and 4 workshops. Enjoy!

Android @ Google I/O: Recapping building across devices

Posted by The Android Team

At Google I/O this year, we talked about how your app can take advantage of Android's different screens, both large and small. But if you missed the show, here are the top things you should know:

Tablets, Foldables, and Large Screens

It's more important than ever to design your app to work well on large screens — including tablets, foldables, and Chrome OS laptops. There are already over 250 million large screen Android devices in use today. Meanwhile, new foldable devices are making it easier for users to multitask, and opening up new experiences like tabletop mode for hands-free activities. See this example of Disney+ using tabletop mode on the Samsung Galaxy Z Fold2.

foldables image

Fortunately, it's also easier than ever to design apps which seamlessly scale to adapt to any device size — including dynamically resizing on Chrome OS and foldable devices, taking advantage of Jetpack Compose or ConstraintLayout to build responsive layouts. We also studied how people interact with large screens, like where their fingers are placed, and we’re giving you APIs and Tools to make that experience easier:

We’ve also made updates to the Android platform, Chrome OS, and Jetpack WindowManager, so apps just work better by default. For example, many UI elements now have default Max Width values to make sure they look better on large screens, while changes to the Display API ensure that existing apps continue to render correctly on foldables even if they aren't using WindowManager to query window metrics.

Learn more about how we are helping you build for large screens with these I/O sessions:

For even more details, check out the what's new in foldables, tablets, and large screens article, or read the case study on how Google Duo sees increased engagement and improved ratings.

Wear OS

We announced our biggest update yet to the Wear platform, with new features, APIs and tools to help developers create beautiful, high quality wearable experiences.

There are new Jetpack APIs to help you streamline your development. The Tiles library gives users fast, predictable access to the information and actions they rely on most. Another notable addition is the Ongoing Activities API, which enables you to let your users return to your app after they’ve navigated away (to start some other task such as music playback). Both of these libraries are currently in alpha.

We also released a new set of APIs for health and fitness that act as an intermediary to the sensors and related algorithms on the device to provide apps with high-quality data related to activity, exercise, and health. The alpha of the Health Services platform is available to use today.

Download Android Studio Arctic Fox Beta to try out a developer preview of the new Wear system image and start preparing your apps for the new platform. Check out the I/O sessions below to learn more about these announcements:

You can also read more details on the latest changes to Wear, as well as learn about how Spotify is building on Wear.

Android TV

Android TV OS now has over 80 million monthly active devices, with 80% growth in the US and is at the heart of the Google TV experience launched last fall. Meanwhile, Google TV itself can be found on streaming devices like the Chromecast with Google TV, smart TVs from Sony, and as an app on Android devices — including tablets.

This year at I/O, we announced several new tools and features to make developing for Android TV OS easier:

  • Cast Connect with Stream Transfer allows moving existing audio and video streams between cast devices, while Stream Expansion allows playing audio on multiple devices simultaneously.
  • We are now making our first Google TV Emulator available alongside the Android TV emulator, both running on Android 11.
  • Firebase Test Lab is adding Android TV support, letting you test your app in the cloud across hundreds or thousands of virtual devices. Physical Devices will be coming soon.
  • We are making the Android 12 Beta 1 available for TV on ADT-3 today.

These releases make it easier to build and test applications across a range of device configurations, while bringing the latest Android 12, Googler Assistant, and Cast features to the TV. To learn more, watch the What's new in Android TV and Google TV session from I/O.

Android for Cars

Android Auto allows applications to connect with the infotainment displays built into many modern vehicles. To make this even easier we recently made the Android for Cars App Library available as part of Jetpack. This library allows navigation, EV charging, and parking apps to integrate directly with compatible cars.

We plan to expand to more app categories in the future, so if you’re expressing interest in bringing your app to Android Auto please fill out this interest form. You can also get started with the Android for Cars App Library today, by visiting g.co/androidforcars. Watch the What’s new with Android for Cars session from I/O for even more detail, or the accompanying What's new with Android for Cars blog post.

What’s new for Android developers at Google I/O

Cross-posted on the Android Developers blog by Karen Ng, Director, Product Management & Jacob Lehrbaum, Director of Developer Relations, Android & Play

As Android developers, we are all driven by building experiences that delight people around the world. And with people depending on your apps more than ever, expectations are higher and your jobs as developers aren’t getting easier. Today, at Google I/O, we covered a few ways that we’re trying to help out, whether it be through Android 12 - one of the biggest design changes ever, Jetpack, Jetpack Compose, Android Studio, and Kotlin to help you build beautiful high quality apps. We’re also helping when it comes to extending your apps wherever your users go, like through wearables and larger-screened devices. You can watch the full Developer Keynote, but here are a few highlights:

Android 12: one of the biggest design updates ever.

The first Beta of Android 12 just started rolling out, and it’s packed with lots of cool stuff. From new user safety features like permissions for bluetooth and approximate location, enhancements to performance like expedited jobs and start up animations, to delightful experiences with more interactive widgets and stretch overscrolling, this release is one of the biggest design updates to Android ever. You can read more about what’s in Android 12 Beta 1 here, so you can start preparing your apps for the consumer release coming out later this year. Download the Beta and try it with your apps today!

Android 12 visual

Jetpack Compose: get ready for 1.0 in July!

For the last few years, we’ve been hard at work modernizing the Android development experience, listening to your feedback to keep the openness–a hallmark of Android, but becoming more opinionated about the right way to do things. You can see this throughout, from Android Studio, a performant IDE that can keep up with you, to Kotlin, a programming language that enables you to do more with less code, to Jetpack libraries that solve the hardest problems on mobile with backward compatibility.

The next step in this offering is Jetpack Compose - our modern UI toolkit to easily build beautiful apps for all Android devices. We announced Compose here at Google I/O two years ago and since then have been building it in the open, listening to your feedback to make sure we got it right. With the Compose Beta earlier this year, developers around the world have created some truly beautiful, innovative experiences in half the time, and the response to the #AndroidDevChallenge blew our socks off!

With the forthcoming update of Material You (which you can read more about here), we’ll be adding new Material components as well as further support for building for large screens, making it fast and easy to build a gorgeous UI. We’re pressure testing the final bits in Compose and will release 1.0 Stable in July—so get ready!

Android Studio Arctic Fox: Design, Devices, & Developer Productivity!

Android Studio Arctic Fox (2020.3.1) Beta, the latest release of the official powerful Android IDE, is out today to help you build quality apps easier and faster. We have delivered and updated the suite of tools to empower three major themes: accelerate your UI design, extend your app to new devices, and boost your developer productivity. With this latest release you can create modern UIs with Compose tooling, see test results across multiple devices, and optimize debugging databases and background tasks with the App Inspector. We’re also making your apps more accessible with the Accessibility Scanner and more performant with Memory Profiler. And for faster build speeds, we have the Android Gradle plugin 7.0, new DSL, and variant APIs. You can learn more about the Android Studio updates here.

Android Studio Arctic Fox

Kotlin: the most used language by professional Android devs

Kotlin is now the most used primary language by professional Android developers according to our recent surveys; in fact, over 1.2M apps in the Play Store use Kotlin, including 80% of the top 1000 apps. And here at Google, we love it too: 70+ Google apps like Drive, Home, Maps and Play use Kotlin. And with a brand-new native solution to annotation processing for Kotlin built from the ground up, Kotlin Symbol Processing is available today, a powerful and yet simple API for parsing Kotlin code directly, showing speeds up to 2x faster with libraries like Room.

Android Jetpack: write features, not boilerplate

With Android Jetpack, we built a suite of libraries to help reduce boilerplate code so you can focus on the code you care about. Over 84% of the top 10,000 apps are now using a Jetpack library. And today, we’re unpacking some new releases for Jetpack, including Jetpack Macrobenchmark (Alpha) to capture large interactions that affect your app startup and jank before your app is released, as well as a new Kotlin Coroutines API for persisting data more efficiently via Jetpack DataStore (Beta). You can read about all the updates in Android Jetpack here.

Now is the time: a big step for Wear

The best thing about modern Android development is that these tools have been purpose built to help make it easy for you to build for the next era of Android, which is all about enabling devices connected to your phone–TVs, cars, watches, tablets–to work better together.

Starting today, we take a huge step forward with wearables. First, we introduced a unified platform built jointly with Samsung, combining the best of Wear and Tizen. Second, we shared a new consumer experience with revamped Google apps. And third, a world-class health and fitness service from Fitbit is coming to the platform. As an Android developer, it means you’ll have more reach, and you’ll be able to use all of your existing skills, tools, and APIs that make your mobile apps great, to build for a single wearables platform used by people all over the world.

Whether it’s new Jetpack APIs for Wear tailored for small screens and designed to optimize battery life, to the Jetpack Tiles API, so you can create a custom Tile for all the devices in the Wear ecosystem, there are a number of new features to help you build on Wear. And with a new set of APIs for Health and Fitness, created in collaboration with Samsung, data collection from sensors and metrics computation is streamlined, consistent, and accurate–like heart rate to calories to daily distance–from one trusted source. All this comes together in new tooling, with the release of Android Studio Arctic Fox Beta, like easier pairing to test apps, and even a virtual heart rate sensor in the emulator. And when your app is ready, users will have a much easier time discovering the world of Wear apps on Google Play, with some big updates to discoverability. You can read more about all of the Wear updates here.

Tapping the momentum of larger screens, like tablets, Chrome OS and foldables

When it comes to larger screens -- tablets, foldables, and Chrome OS laptops-- there is huge momentum. People are increasingly relying on large screen devices to stay connected with family and friends, go to school, or work remotely. In fact, there are over 250 million active large screen Android devices. Last year, Chrome OS grew +92% year over year–5 times the rate of the PC market, making Chrome OS the fastest growing and the second-most popular desktop OS. To help you take advantage of this momentum, we’re giving you APIs and tools to make optimizing that experience easier: like having your content resize automatically to more space by using SlidingpaneLayout 1.2.0 and a new vertical navigation rail component, Max widths on components to avoid stretched UIs, as well as updates to the platform, Chrome OS, and Jetpack windowmanager, so apps work better by default. You can learn more here.

Google Duo's optimized experience for foldable devices

Google Duo's optimized experience for foldable devices

This is just a taste of some of the new ways we’re making it easier for you to build high quality Android apps. Later today, we’ll be releasing more than 20 technical sessions on Android and Play, covering a wide range of topics such as background tasks, privacy, and Machine Learning on Android, or the top 12 tips to get you ready for Android 12. If building for cars, TVs, and wearables is your thing, we got that covered, too. You can find all these sessions - and more - on the I/O website. Beyond the sessions and news, there’s a number of fun ways to virtually connect with Googlers and other developers at this year’s Google I/O. You can check out the Android dome in I/O Adventure, where you can see new blog posts, videos, codelabs, and more. Maybe even test out your Jetpack Compose skills or take a virtual tour of the cars inside our dome!

What’s new in foldables, tablets, and large screens

Posted by Oscar Wahltinez, Developer Relations Engineer, Google

Users are seeing more value in larger screens, and the benefits of doing more with a single device. Apps designed for large screen devices increase those benefits even further.

The ability to fold a screen offers better ergonomics for large devices. When folded, you can fit a tablet-sized screen in your pocket — unlocking utility that was previously unavailable on a portable device. Thinking about our app ecosystem, we’re excited because this is a hardware shift that is driving new expectations around what you can do from a handheld device. We see the demand for larger screens extending to tablets too, which have greatly increased in popularity, given the similar app experience.

Technological breakthroughs and our understanding of ergonomics have played a role in device form factors.

Technological breakthroughs and our understanding of ergonomics have played a role in device form factors.

In this blog post, we'll explain what you should do to prepare your apps for large screens, and how recent updates have made developing your app easier. But first, let’s talk about what we're seeing with large screens — and why you should optimize your app.

Why large screens

There are many ways to use foldable devices, including a number of postures
  illustrated here.

There are many ways to use foldable devices, including a number of postures illustrated here.

Over the past year, we’ve seen device makers release exciting new foldable and tablet devices. Demand has increased as users are doing more than ever from these devices. Altogether, developers can reach more than 250 million active foldables, tablets, and Chromebooks by building for Android large screen devices today. Sales of tablet devices grew 16% in 2020 with analysts expecting more than 400 million Android tablets by 2023, and foldables are redefining what’s possible on premium devices. Android apps can also run on ChromeOS, which is now the second most popular desktop OS.

Large screen ready

Larger screens are changing how users interact with their device. These devices allow you to edit slide decks while looking at notes, look up restaurant recommendations while planning a night out, or watch a video while chatting with friends. Let’s talk about base-level support — features an app must support to be “large screen ready”. There are three main areas of focus when it comes to large screen readiness:

  1. Designing for large screens
  2. Multitasking
  3. Input modes

They’re summarized below, but make sure to check out our large screen app quality guidelines for the full details.

Design for large screens

The first step is to ensure that your app is designed for large screens. To make this easier, we’ve defined specific window size breakpoints and device classes for you to optimize for. Add tablet layouts for displays where the shortest dimension is >600dp, and ensure your apps go edge-to-edge. Developers should also plan for their app to be used in both portrait and landscape modes, since larger screens are more likely to be used in landscape. We’ve got material adaptive components that we’ll be talking about to help developers make better use of the increased space.

Since foldable and large screen devices have a variable window size, adaptive
  layouts work better than splitting experiences based on screen size.

Since foldable and large screen devices have a variable window size, adaptive layouts work better than splitting experiences based on screen size.

Multitasking

Going into split screen (or multi-window mode) and gestures like drag and drop are starting to become natural interactions that users expect to work seamlessly in their large screen devices. Your apps should handle multitasking seamlessly by being resizable. Handling folding and unfolding events and planning for your app to be in multi-window mode prevents your app from becoming letterboxed.

Drag and drop can be a natural interaction in large screen layouts, even within the same
  app.

Drag and drop can be a natural interaction in large screen layouts, even within the same app.

By enabling multiple instance support, users can run multiple copies of your
  app side-by-side. The let’s users compare two products, reference notes
  while writing a document or maybe keeping your calendar in view as you are
  planning an event.

By enabling multiple instance support, users can run multiple copies of your app side-by-side. The let’s users compare two products, reference notes while writing a document or maybe keeping your calendar in view as you are planning an event.

Input modes

Since many people use larger screens for productivity, tablets should support basic keyboard, mouse and stylus usage.

Users of Android apps on ChromeOS devices often have a keyboard; apps should ensure that standard keyboard navigation and shortcuts are available to provide improved accessibility.

Users of Android apps on ChromeOS devices often have a keyboard; apps should ensure that standard keyboard navigation and shortcuts are available to provide improved accessibility.

Component updates

Several UI components across Jetpack and Material Design libraries have been updated to help you build a flexible user experience to scale your phone's UI to a larger screen.

SlidingPaneLayout

One of the most common adaptive layouts to optimize your app for large screens is implementing a list-detail UI. For example, a messaging app that lists messages on one side with the message detail on the other.

SlidingPaneLayout automatically adapts to configuration changes to provide a good user experience across different layout sizes.

SlidingPaneLayout automatically adapts to configuration changes to provide a good user experience across different layout sizes.

UIs that would be one top of each other on a smaller screen can now easily lay out side-by-side. For this, you can use the updated version of the SlidingPaneLayout library — updated to support a two-pane style layout, SlidingPaneLayout uses the width of the two panes to determine how to lay out the UI. It does that by automatically determining if it can lay out side-by-side based on the content width and available space. For example, if the list pane is measured to have a minimum width of 200dp and the detail pane needs 400dp, then the SlidingPaneLayout automatically shows the two panes side by side if it has at least 600dp of width available.

SlidingPaneLayout is used in our sample application IOSched.

SlidingPaneLayout is used in our sample application IOSched.

We have updated the library to recognize and adapt to folds and hinges . For example, if you are on a device with hinges that blocks part of the screen, it will automatically place your content on either side.

We have also introduced lock modes,which allow control over the swipe behavior when panes overlap (programmatically switching is also supported). For example, to prevent users from swiping to an empty pane you may want them to have to click on a list item to load information about that pane, but allow them to swipe back to the list. On a foldable device or tablet that has room to show both views side by side, the lock modes are ignored.

NavRail

A vertical Navigation Rail is functionally equivalent to Bottom navigation, and provides a more ergonomic navigation experience on larger screens. As you scale your UI, NavRail supports better reachability, since larger screens tend to be held by the side, whereas on the phone users are probably holding the device from the bottom.

NavRail automatically changes the location of the navigation menu depending
	on configuration changes.

NavRail automatically changes the location of the navigation menu depending on configuration changes.

For example, NavRail can help if vertical scrolling is key to your app. In those cases, a bottom navigation bar decreases the amount of content that’s visible, especially when tablet devices are being used in landscape orientation.

Other Components

We've also made updates across multiple other components. One of the biggest pitfalls when apps move to a larger screen is when UIs are stretched edge-to-edge across the whole screen. To help prevent this, we’ve added default Max Width values to certain Material Components where this commonly happens, for example:

  • Buttons
  • TextFields
  • Sheets

We will add more components to this list in the future. These changes provide opinionated defaults to help your apps adapt and look better out of the box on large screen devices. Find more information about using size constraints with components in the Material Design guidelines.

Most foreground UI elements should have a maximum width value.

Most foreground UI elements should have a maximum width value.

WindowManager Jetpack library

Beyond component updates to help you scale your UI, we also have the WindowManager Jetpack library to help you build better experiences on these devices. This library is now available in alpha and it provides a common API surface for supporting different device types, starting with foldables and tablets.

You can use WindowManager to detect display features such as folds or hinges. It also gives information about how the display feature affects your app, so you can create an optimal experience. For example, reacting to the foldable device state changes when the device is folded into tabletop mode while the user is watching a video.

Applications should seamlessly adapt to a growing number of device configurations.

Applications should seamlessly adapt to a growing number of device configurations.

WindowManager also provides a couple of convenience methods to retrieve the current and maximum WindowMetrics information in a backward compatible way, starting from API level 14.

Platform changes

Display API deprecations

Your app needs to determine the screen or display size in order to render content appropriately for each device. With the introduction of the WindowMetrics API, a number of methods related to display size have been deprecated. For a backwards-compatible replacement, you should use the Window Manager Jetpack library.

Exclusive resources

Android 10 introduced the possibility to have multiple resumed apps running at the same time, with a single “top resumed” application. Most applications benefit from this change without the need of updates. The most notable exception is if your application uses an exclusive resource like the microphone or the camera. See our previous blog post for more details.

Case studies

Optimizing your app for large screens can improve the experience for your users, as well as deliver on business results. We’re seeing an increased number of apps take advantage of the opportunities with large screens on Google Play. As an example, Google Duo implemented tablet and foldable support to enhance their user experience, and saw an increase in app ratings and user engagement.

Google Duo's optimized experience for foldable devices

Google Duo's optimized experience for foldable devices, such as the Samsung Galaxy Z Fold2

In addition to Google Duo's enhanced user experience, we've modernized many additional apps to use adaptive layouts so they can take advantage of large screens and foldable devices:

  • Chrome added improved tab navigation for larger screens
  • YouTube redesigned its UI to improve usability in foldable devices
  • Google Photos displays more UI elements, like a search bar, in larger screens
  • Google Calendar provides a more ergonomic UI in larger screens


Learn more

To learn more about foldables and large screen devices, see the following resources:

What’s new for Android developers at Google I/O

Posted by Karen Ng, Director, Product Management & Jacob Lehrbaum, Director of Developer Relations, Android & Play

As Android developers, we are all driven by building experiences that delight people around the world. And with people depending on your apps more than ever, expectations are higher and your jobs as developers aren’t getting easier. Today, at Google I/O, we covered a few ways that we’re trying to help out, whether it be through Android 12 - one of the biggest design changes ever, Jetpack, Jetpack Compose, Android Studio, and Kotlin to help you build beautiful high quality apps. We’re also helping when it comes to extending your apps wherever your users go, like through wearables and larger-screened devices. You can watch the full Developer Keynote, but here are a few highlights:

Android 12: one of the biggest design updates ever.

The first Beta of Android 12 just started rolling out, and it’s packed with lots of cool stuff. From new user safety features like permissions for bluetooth and approximate location, enhancements to performance like expedited jobs and start up animations, to delightful experiences with more interactive widgets and stretch overscrolling, this release is one of the biggest design updates to Android ever. You can read more about what’s in Android 12 Beta 1 here, so you can start preparing your apps for the consumer release coming out later this year. Download the Beta and try it with your apps today!

Android 12 visual

Jetpack Compose: get ready for 1.0 in July!

For the last few years, we’ve been hard at work modernizing the Android development experience, listening to your feedback to keep the openness–a hallmark of Android, but becoming more opinionated about the right way to do things. You can see this throughout, from Android Studio, a performant IDE that can keep up with you, to Kotlin, a programming language that enables you to do more with less code, to Jetpack libraries that solve the hardest problems on mobile with backward compatibility.

The next step in this offering is Jetpack Compose - our modern UI toolkit to easily build beautiful apps for all Android devices. We announced Compose here at Google I/O two years ago and since then have been building it in the open, listening to your feedback to make sure we got it right. With the Compose Beta earlier this year, developers around the world have created some truly beautiful, innovative experiences in half the time, and the response to the #AndroidDevChallenge blew our socks off!

With the forthcoming update of Material You (which you can read more about here), we’ll be adding new Material components as well as further support for building for large screens, making it fast and easy to build a gorgeous UI. We’re pressure testing the final bits in Compose and will release 1.0 Stable in July—so get ready!

Android Studio Arctic Fox: Design, Devices, & Developer Productivity!

Android Studio Arctic Fox (2020.3.1) Beta, the latest release of the official powerful Android IDE, is out today to help you build quality apps easier and faster. We have delivered and updated the suite of tools to empower three major themes: accelerate your UI design, extend your app to new devices, and boost your developer productivity. With this latest release you can create modern UIs with Compose tooling, see test results across multiple devices, and optimize debugging databases and background tasks with the App Inspector. We’re also making your apps more accessible with the Accessibility Scanner and more performant with Memory Profiler. And for faster build speeds, we have the Android Gradle plugin 7.0, new DSL, and variant APIs. You can learn more about the Android Studio updates here.

Android Studio Arctic Fox

Kotlin: the most used language by professional Android devs

Kotlin is now the most used primary language by professional Android developers according to our recent surveys; in fact, over 1.2M apps in the Play Store use Kotlin, including 80% of the top 1000 apps. And here at Google, we love it too: 70+ Google apps like Drive, Home, Maps and Play use Kotlin. And with a brand-new native solution to annotation processing for Kotlin built from the ground up, Kotlin Symbol Processing is available today, a powerful and yet simple API for parsing Kotlin code directly, showing speeds up to 2x faster with libraries like Room.

Android Jetpack: write features, not boilerplate

With Android Jetpack, we built a suite of libraries to help reduce boilerplate code so you can focus on the code you care about. Over 84% of the top 10,000 apps are now using a Jetpack library. And today, we’re unpacking some new releases for Jetpack, including Jetpack Macrobenchmark (Alpha) to capture large interactions that affect your app startup and jank before your app is released, as well as a new Kotlin Coroutines API for persisting data more efficiently via Jetpack DataStore (Beta). You can read about all the updates in Android Jetpack here.

Now is the time: a big step for Wear

The best thing about modern Android development is that these tools have been purpose built to help make it easy for you to build for the next era of Android, which is all about enabling devices connected to your phone–TVs, cars, watches, tablets–to work better together.

Starting today, we take a huge step forward with wearables. First, we introduced a unified platform built jointly with Samsung, combining the best of Wear and Tizen. Second, we shared a new consumer experience with revamped Google apps. And third, a world-class health and fitness service from Fitbit is coming to the platform. As an Android developer, it means you’ll have more reach, and you’ll be able to use all of your existing skills, tools, and APIs that make your mobile apps great, to build for a single wearables platform used by people all over the world.

Whether it’s new Jetpack APIs for Wear tailored for small screens and designed to optimize battery life, to the Jetpack Tiles API, so you can create a custom Tile for all the devices in the Wear ecosystem, there are a number of new features to help you build on Wear. And with a new set of APIs for Health and Fitness, created in collaboration with Samsung, data collection from sensors and metrics computation is streamlined, consistent, and accurate–like heart rate to calories to daily distance–from one trusted source. All this comes together in new tooling, with the release of Android Studio Arctic Fox Beta, like easier pairing to test apps, and even a virtual heart rate sensor in the emulator. And when your app is ready, users will have a much easier time discovering the world of Wear apps on Google Play, with some big updates to discoverability. You can read more about all of the Wear updates here.

Tapping the momentum of larger screens, like tablets, Chrome OS and foldables

When it comes to larger screens -- tablets, foldables, and Chrome OS laptops-- there is huge momentum. People are increasingly relying on large screen devices to stay connected with family and friends, go to school, or work remotely. In fact, there are over 250 million active large screen Android devices. Last year, Chrome OS grew +92% year over year–5 times the rate of the PC market, making Chrome OS the fastest growing and the second-most popular desktop OS. To help you take advantage of this momentum, we’re giving you APIs and tools to make optimizing that experience easier: like having your content resize automatically to more space by using SlidingpaneLayout 1.2.0 and a new vertical navigation rail component, Max widths on components to avoid stretched UIs, as well as updates to the platform, Chrome OS, and Jetpack windowmanager, so apps work better by default. You can learn more here.

Google Duo's optimized experience for foldable devices

Google Duo's optimized experience for foldable devices

This is just a taste of some of the new ways we’re making it easier for you to build high quality Android apps. Later today, we’ll be releasing more than 20 technical sessions on Android and Play, covering a wide range of topics such as background tasks, privacy, and Machine Learning on Android, or the top 12 tips to get you ready for Android 12. If building for cars, TVs, and wearables is your thing, we got that covered, too. You can find all these sessions - and more - on the I/O website. Beyond the sessions and news, there’s a number of fun ways to virtually connect with Googlers and other developers at this year’s Google I/O. You can check out the Android dome in I/O Adventure, where you can see new blog posts, videos, codelabs, and more. Maybe even test out your Jetpack Compose skills or take a virtual tour of the cars inside our dome!

High engagement, larger screens: How Android developers can reach users on any device

Posted by Allan Livingston, Product Management Director, Chrome OS App Ecosystem

Android fuels mobile apps on devices that range far beyond your typical small-screen smartphone, from new Chromebooks like the lightweight, high-performance Google Pixelbook Go to multi-display devices and foldable phones like the Samsung Galaxy Fold. Not to mention the more than 175M Android tablets that have the Google Play store installed.1

These large-screen devices set the stage for more engaging and visually immersive experiences, whether by creating a larger canvas for creativity or by giving users faster, more flexible ways to work. As we’ve continued to prioritize large-screen devices with OEM partners like Samsung, Asus, and Lenovo, we’ve been able to expand our reach to a huge new audience of users.

During the week of Black Friday in 2018, 1 in 3 notebooks sold in the U.S. were Chromebooks.2 Chromebook unit sales also increased 22% YoY, while the rest of the notebook category decreased -6.1%.3 And we’re not just reaching more users — we’re reaching more engaged users. In fact, in just the last year, the total amount of time spent in Android apps on Chrome OS has grown 4X.4

YoY notebook sales in the U.S.

By making adjustments for larger screens, you can provide richer experiences across all these devices and tap into a wider audience of app users. Development teams around the world — including Adobe Lightroom, Evernote, and Gameloft, among many others — have already seen some incredible results:

App developers driving engagement on larger screens

With the goal of allowing users to play any video file, anywhere, on any device or screen size, the developers at VideoLAN project decided to adapt VLC — an open source, cross-platform multimedia player — for all screens. The team started by adding keyboard and mouse support before designing multiple versions of the layout to allow users to easily scale and resize the app.

Users can now enjoy the same immersive experience across a range of different devices and form factors, and VideoLAN has already received overwhelmingly positive feedback from users around the world.

War Robots — a 12-player real-time battle game developed by Pixonic — was originally designed for early-generation phones. The team enabled windowed gameplay so users could play in one window while watching their favorite streamers or upgrading their robots in another, created new tutorials and controls that appear whenever players switch between desktop and tablet mode, and added support for keyboard and mouse input.

More than 100,000 players have already played War Robots on Chrome OS since Pixonic rolled out the latest optimizations, which made War Robots’ battles even more thrilling and engaging on larger screens, and Pixonic has seen 25% longer user sessions on Chromebooks as a result.

Is your app optimized for large-screen devices? Here are a few things to consider:

1) Laptop and tablet mode
Test your core app functions to make sure everything works smoothly without crashing as users switch between different modes.

2) Window management and layout
Support multi-window mode and free-form window resizing, and be sure to design optimized layouts for both landscape and portrait orientations. Set up your app to correctly handle configuration changes to avoid crashes when people rotate their devices.

Suite of devices

3) Keyboard and mouse input
Make sure your app is fully functional without touch input, and add support for keyboards, mice, and game controllers (if applicable).

4) Hardware support
If you’re using NDK, be sure to support x86 (32 and 64bit) ABIs to ensure the highest possible performance.

Build, test, and run Android apps on a Chromebook

From the start, our goal has been to make the Chromebook a simple, secure, and speedy environment for everyone. The launch of Linux (Beta) on Chrome OS allowed Android developers to build and test apps with a Chromebook. And earlier this year at I/O, we announced that Android Studio 3.5 now fully supports Chrome OS with a simple one-click installation.

Since then, we’ve been working on a few improvements that make Chromebooks an even better place for safe and seamless Android app development. Let’s start with the biggest one:

Deploying an app directly to Chrome OS to enable full Android development
In the past, you could only test your apps by deploying them to Android phones. With Chrome OS’s upcoming M80 release, you’ll be able to deploy Android apps directly to your Chromebook. That way, you can develop and test your app on the same machine, all without a connected device or needing to put your laptop in developer mode. Developers can start testing this feature in developer channel in November.

GPU acceleration for a snappier, jank-free UI (now in beta channel)
We’ve enabled GPU support to reduce latency and deliver a snappier UI. That goes for developer apps such as Android Studio, Unity Editor, or Visual Studio Code. And for developers who also work on web apps, GPU acceleration means faster testing with Chrome Canary or Firefox.

Container backup and restore to easily move between devices
Previously, Linux files and apps were tied entirely to the device — if you lost your device, you lost all the work inside of it. Now, Chrome OS’s container-based architecture allows you to pack up your entire workspace and export it to external storage or Drive. The backup file can be restored at any point, either on the same machine — which is helpful when jumping back to a previous state — or to move to another Chromebook.

You can now find import and export buttons in your Linux settings.

Picture-in-picture (PiP) support

If you’ve built PIP support into your Android apps, you’ll see that function work seamlessly in Chrome OS in 2020. But you can start testing this feature now by enabling PiP in Android settings → Developer options.

Build your apps with larger screens in mind

With millions of users on Chromebooks, tablets, foldables, and now multi-display devices, designing app experiences with larger screens in mind is crucial. Seize this opportunity to engage more users by optimizing your existing apps to work great across all screens. And the latest Linux features on Chrome OS give you the power to use a single machine to build and run Android apps. Don’t hesitate to take action to ensure your apps work seamlessly on larger screens with Linux on Chrome OS.









Sources

1. The number of tablets only accounts for devices that have the Google Play Store installed (e.g., excluding tablets in China); the actual number of tablets capable of running Android applications is much larger.

2. The NPD Group, Inc., Retail Tracking Service, U.S., Notebook Computers, Chrome OS, based on units, Nov. 18, 2018–Nov. 24, 2018 vs. Nov. 19, 2017–Nov. 25, 2017.

3. The NPD Group, Inc., U.S. Retail Tracking Service, Notebook Computers, based on units, Sept. 2018–Aug. 2019. Sales are adjusted for 5 weeks in Jan. 2018 vs. 4 weeks in Jan. 2019.

4. Google Internal Data, March 2018–March 2019.

Bring Your Apps into the Classroom, with Google Play for Education

Posted by Shazia Makhdumi, Head of Strategic EDU Partnerships, Google Play team

Google Play for Education has officially launched. It’s an extension of Google Play that’s designed for schools, simplifying discovery of educational apps and enabling developers and content providers to reach K-12 educators in the U.S. It offers bulk purchasing with purchase orders and instant distribution of educational apps, videos and other educational content to students' Android tablets via the cloud. Google Play for Education helps your apps gain visibility with the right audiences, without having to knock on school doors.

If you've built an Android app that would be awesome for schools—or even have an idea for one—now's the time to jump in. We'll put you one click away from getting purchased and installed by entire school districts. Class Dojo, Explain Everything, Nearpod, and Socrative are already getting discovered in Google Play for Education.

How to join Google Play for Education

If you already have an educational Android app you can use the Google Play Developer Console to mark your apps for inclusion in Google Play for Education. Marking your app identifies it as suitable for the US K-12 educational market and queues it for educator approval. These educators perform a first-pass qualification of apps, assigning the appropriate subject, grade, and common core standards metadata, while evaluating if the app meets the Google Play for Education criteria for classroom use.

Designing great apps for classrooms

High quality apps are top priority for teachers. Whether you already have an existing K-12 educational app or are looking to build one, take a look at our detailed requirements and guidelines—which we have compiled for you based on educator feedback—to ensure your app is appropriate for a K-12 environment. Also ensure that your app is optimized for both 7” and 10” Android tablets. Then, upload your new or updated app through the Developer Console, opt in to Google Play for Education, and publish. We will email you when your app has been evaluated.

For more information, please visit the Google Play for Education pages on the Android developer site. We are excited to be supporting schools to bring the best content and tools to their students. We look forward to seeing your app on Google Play for Education.



Tablet changes in Google Play

Posted by Ellie Powers, Google Play team

Fueled by the Nexus 7 and other great devices, more than 70 million Android tablets have been activated. Thousands of developers have already designed their apps to look great on tablets, and with the holidays fast approaching, we’re making it even easier for the next wave of tablet owners to discover great apps and games.

Play Store tablet changes coming up on November 21

Last year, Google Play added a “designed for tablets” section, where users could easily discover apps that look great on their 7”- and 10”-tablets. This section includes only apps and games which meet criteria and guidelines we established last year. (Here’s an overview if you missed it.) Developers who invest the time to meet the criteria are seeing great results; take Remember The Milk, which saw an 83% increase in tablet downloads from being in this section. (see the whole story here).

On November 21 2013, the Play Store made a series of changes so it’s even easier for tablet users to find those apps that are best for their devices. First, by default, users browsing Google Play on a tablet will now see apps and games that are designed for tablets on the top lists (Top Paid, Top Free, Top Grossing, Top New Paid, Top New Free, and Trending). Tablet users will still be able to switch the view so they can see all apps or games if they choose. Also starting November 21, apps and games that do not meet the “designed for tablets” criteria will be marked as “designed for phones” for users who browse the Play Store on tablets.

You’ll want to make sure that your app is designed for tablets; read more about how to do this at the end of this blog post.

Make sure your app is ready!

If you want to be sure your app is included in the “Designed for tablets” view, go to the Developer Console to check your tablet optimization tips. If you see any issues listed there, you’ll need to address them in your app and upload a new binary for distribution. If there are no issues listed, your app is eligible to be included in the “Designed for tablets" view in the top lists.

Also, make sure to read the full tablet quality checklist to understand how to build outstanding tablet experiences.

Everyday, thousands of Android developers are taking advantage of the tremendous Android tablet opportunity. The flood of new users coupled with the increased screen size means new user experiences, more engagement and more monetization opportunities. We’re excited to see what you do!

Unlocking More Users, with Tablets and Games

Posted by Purnima Kochikar, Director of Business Development, Games & Applications

Last week, we unveiled a number of new things in the world of Android. And while we already showcased the new tools available at your disposal in Android 4.3, we also unveiled a new Nexus 7 tablet, as well as the Google Play Games app, both of which represent opportunities to take advantage of a growing number of users.

Nexus 7 and the Android tablet revolution

If you’re a developer optimizing your app for Android tablets, no doubt you’re familiar with the original Nexus 7. It was Google’s statement on what a great Android tablet experience should look like, and since then, the Android tablet ecosystem has come a long way. There have already been more than 70 million activations of Android tablets, with more than 1 in 2 tablets sold today running Android. We’re starting to see with Android tablets what could be the hockey stick growth all of us experienced a couple of years ago with Android smartphones, and we hope that the new Nexus 7 continues to fuel this growth even further.

Most top developers on Android have already prepared their applications for this wave of new Android tablet users, including many of the essentials, like the New York Times, Zappos, Evernote, Flipboard, Pinterest and more. To help users find your tablet-designed apps more easily on Google Play, you can now choose to only see apps designed for tablets in the top lists. There are also over 50 new collections, which highlight outstanding tablet apps.

To take advantage of the Android tablet revolution, check out our Tablet App Quality Checklist, which has tips and techniques on how to deliver a great app experience for tablet users. It details all of the key things you need to do to optimize your app for tablets, like taking advantage of the extra screen real estate and adjusting font sizes and touch targets, to things you can do on the distribution side, like declaring support for tablet screens and showcasing your tablet UI on Google Play by uploading tablet-specific screenshots. Optimizing your app for Android tablets will unlock a whole new group of users, like those who are about to receive their new Nexus 7 tablets.

Taking your game to the next level

The Android games category on Google Play is on fire; in fact, the vast majority of top mobile game developers are building Android tablet games, and most new titles launch immediately on Android. To help game developers take advantage of the next generation of games, at Google I/O in May, we introduced Google Play game services, our gaming platform for Android, iOS, and the web. By building on Google’s strengths in mobile and cloud services, Google Play game services allows game developers to focus on what they’re good at: creating great gaming experiences for their users.

Turbocharging that growth even more, on Wednesday we introduced the Google Play Games app, which brings your friends together with the games you love, where you can invite a friend and start challenging gamers around the world, compete for top achievements, and race to the top of the leaderboard.

Since the launch at Google I/O, just over two months ago, over one thousand games have added Google Play game services, with millions of users enjoying features like leaderboards and multiplayer inside of the games they love. Some of those early developers using Google Play game services are reporting incredible upticks in vital engagement metrics; for instance, Concrete Software is seeing session length up 15%, and Glu is reporting a 40% increase in 7-day user retention.

Here are a few things you can do to take your game to the next level with Google Play:

  • Integrate with Play Games using achievements and leaderboards to activate your players.
  • Add real-time multiplayer to competitive and cooperative games and increase engagement.
  • Use Play Games branding guidelines and create rich visuals that bolster your presence in the Google Play Games app.

Whether it be getting your app ready for the wave of new Android tablets that are lighting up each day, or opening up a whole new set of features for your users with Google Play game services, a great Android experience starts with a great app or game. That’s why we’re working hard to help provide you with the tools and features needed to create those great experiences for your users, and to help you reach as many of them as possible in the process, with Google Play.