Category Archives: Android Developers Blog

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Developer tools to debug WebView in Beta

Posted by Nate Fischer, Software Engineer, WebView team

Since 2014, Android WebView has paved the way as an updateable system component, delivering stability and performance improvements, modern web platform features, and security patches to Android apps and users. However, updates can be a double edged sword: as much as we strive for stability and backward compatibility, new crashes and breaking changes occasionally slip through. To solve these issues faster, today we're announcing WebView DevTools, a new set of on-device debugging tools to diagnose WebView-caused crashes and misbehaving web platform features.

For your convenience, WebView DevTools comes included as part of WebView itself. The easiest way to launch WebView Devtools is to try out WebView Beta. WebView's beta program is a way for app developers to get WebView several weeks before they reach users, for extra lead time to report compatibility bugs to our team. Starting with today's release (M83), WebView Beta includes a launcher icon for WebView DevTools. Just look for the blue and gray WebView gear icon to get started debugging WebView in your app.

Inspecting a crash in WebView DevTools.

No software is bug-free and loading web content can be challenging, so it's no surprise WebView crashes are a pain point for apps. Worse yet, these crashes are difficult to debug because WebView's Java and C++ stack traces are obfuscated (to minimize APK size for Android users). To help make these crashes more actionable, we're exposing first-class access to WebView's built-in crash reporter. Just open WebView DevTools, tap on "crashes," and you'll see a list of recent WebView-caused crashes from apps on your device. You can use this tool to see if the crash report has been uploaded to our servers, force-upload it if necessary, and subsequently file a bug. This ensures our team has all the information we need to swiftly resolve these crashes and ensure a smoother user experience in your app.

Using flags to highlight WebView usage in Android apps.

However, not all bugs cause crashes. A handful of past WebView releases have broken Android apps due to behavior changes caused by new features. While our team's policy is to roll back features which break compatibility, the chromium team launches several features for WebView in each release, and we often need time to identify the offending feature. WebView DevTools can help here too. Inspired by Google Chrome's chrome://flags tool, which enables compatibility testing with web platform features, we're offering app developers similar controls for experimental features. To get started, open WebView DevTools, tap on "flags," enable or disable any available features, then kill and restart the WebView-based app you're testing. Using WebView DevTools will help us work together to pin down the culprit so we can roll it back. We've also included flags for features slated for upcoming releases, so you can test compatibility even earlier by enabling these features on your test device.

We hope you find WebView DevTools helpful for reporting crashes and testing against new WebView features. Install WebView Beta today to get started with WebView DevTools, and check out the user guide for more tips and tricks.

Source: Android Developers Blog

Google Play Trust and Safety Update

Posted by Krish Vitaldevara, Director of Product Management Trust & Safety, Google Play

As part of our continuing efforts to enhance user trust and safety across Google Play, we regularly examine our policies to ensure a positive experience for developers and users. Today we are announcing policy updates that give users more control over their data, tighten subscription policies, and help prevent deceptive apps and media getting onto the Play Store.

We understand that many of you are adjusting to or actively supporting efforts in response to the current unprecedented circumstances. We want to assure you that we are mindful and supportive of those efforts, and have taken steps to minimize the potential short-term impact of these changes. You can read more about that in this blog post which shares resources for developers navigating the current context. We also wanted to briefly highlight two of the more impactful policies announced today.

More transparent subscription offers

Subscriptions continue to grow in popularity on Play; however, we hear user feedback that it isn’t always clear what you are signing up for. The goal of this policy update is to ensure users understand the subscription offer, the terms of free trials and introductory offers, and how to manage their subscription, including cancellation.

This blog post goes into more detail about the changes and gives examples of best practices and common violations. Developers have until June 16th to make any changes to their offer page.

Limiting unnecessary location access

Users consistently tell us that they want more control over their location data and that we should take every precaution to prevent misuse. Android users have always needed to grant explicit permission to any app that wants access to their location data. In Android 11, we’re granting additional user controls with the ability to grant a temporary “one-time” permission.

In February, we announced we would require that developers get approval if they want to access background location in their app. This ensures that only apps that really need access for core functionality can ask users for permission. This policy is now live and we encourage all developers who access location to view it.

We realize complying with certain aspects of this policy may require work for some developers so we are giving you an extended timeline to make changes. We suggest that you review location best practices and evaluate whether you have appropriate disclosures, and really need background location; however, no action will be taken for new apps until August 2020 or existing apps until November 2020. Additional details can be found in this help center article and we’ll keep you updated if processes or timelines change. Thanks for your continued support in making Google Play a trustworthy and valuable experience for everyone.

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Source: Android Developers Blog

Building user trust through more transparent subscriptions

Posted by Angela Ying, Product Manager, Google Play

For many developers, subscriptions are an important part of your business. Google Play has continued to support the growth of subscription offerings through developer tools such as new insights in the Google Play Console, and an improved user experience, including the subscriptions center, where users can easily manage all of their subscriptions. Part of improving the subscription user experience comes from fostering a trustworthy platform for subscribers; making sure they feel fully informed when they purchase in-app subscriptions.

To continue to build this trust, we announced an updated subscriptions policy today, as part of a broader policy update to build user trust and enhance user safety across Google Play. This new policy requires you to be transparent about your subscription offering, to ensure every user evaluating your service has an informed choice.

When users lose trust in your app due to unclear subscription offers, they unsubscribe and often leave negative reviews, ultimately hurting your business. On the other hand, a clear and compelling offer gives users all the information they need to make a decision, increasing their trust in your service and hopefully encouraging them to stick around for a long time.

Complying with our subscriptions policy

App with clear offer terms, billing frequency, and price. App with hidden terms, unclear billing frequency and price.

The goal of this policy update is to ensure users understand the subscription offer, the terms of free trials and introductory offers, and how to manage their subscription, including cancellation. You can read the full policy and see examples of best practices and common violations in the Policy Center, but the most important thing is to make sure you are clear about your subscription offering within your app. Consider the following best practices:

Be explicit about your subscription terms, such as:

Whether a subscription is required to use all or parts of the app. If a subscription is not required, users should be able to easily dismiss your subscription offer.
Cost of your subscription
Frequency of your billing cycle.

If you offer free trials and introductory offers, clearly and accurately tell users:

Duration
Pricing
What is included with free trial or introductory offer
When a free trial will convert to a paid subscription
How a user can cancel if they do not want to convert to a paid subscription.

Ensure your app clearly discloses how a subscriber can cancel and/or manage a subscription.

You have until June 16, 2020 to bring your existing apps into compliance with this policy.

A better user experience without additional development work for you

In conjunction with these policy updates, we’ve made several platform-level product changes to help increase user trust and build user confidence in subscribing.

We made improvements to the checkout cart to increase transparency and improve the user experience.
We now email users a reminder before their free trial or intro price ends.
We now email users subscribed to 3-month, 6-month or annual plans a reminder when their renewal is coming up.
We notify active subscribers who uninstall the app that uninstalling does not automatically unsubscribe them from the service.

We believe that although these changes may lead to fewer conversions or more subscription cancelations in the short term, they will also result in higher quality, more committed subscribers with lower refund and chargeback rates. Overall, this should result in a more stable recurring revenue.

Resources to help

We want to help you do the right thing for your subscribers, so we’ve created this checklist, video and training in Google Play’s Academy for App Success to use as a reference when you’re making any necessary app updates.

Thank you for continuing to partner with us to make Google Play a trustworthy platform for you and your users. Not only can we work together to create great experiences for users, but we can continue to grow subscription businesses as well.

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Source: Android Developers Blog

Promoting high-quality, teacher-approved kids content on Google Play

Posted by Michael Watson, Product Manager, Google Play

With more kids spending time at home, parents are looking for ways to find apps and games for children that are both enriching and entertaining. Today, we’re announcing an update that will make it easier for parents to find this content on the Google Play Store. We’re launching the Teacher Approved program, an editorial program to highlight high-quality, teacher-approved apps for kids. This is part of our ongoing effort to create a safer Google Play for kids.

What’s changing

We consulted with academic experts to develop a framework for rating apps for kids. Specially trained teachers across the US will rate apps for kids based on this framework, evaluating things like:

Design quality
Appeal to children
Enrichment potential
Ads & in-app purchases
Age appropriateness

Teacher-approved apps will:

Be eligible to appear in the new Kids section on Google Play
Be eligible for featuring in banners or collections on Google Play
Display the new "Teacher approved" badge
Display information about what teachers found valuable on their app details page

Phone scrolling through teacher-approved app store

The Google Play store featuring teacher-approved apps

As a result of these changes, we are removing the Family star badge and the Family section on Google Play. All apps that were in the Family section will continue to be discoverable on the Play Store and appear in search results. Note that this change will have no effect on Family Library.

Who’s eligible

Apps need to meet the requirements of the Designed for Families program before they’re eligible to be reviewed by teachers. All Designed for Families apps are automatically placed in the teacher review queue.

We made the decision to launch the Teacher Approved program a little early given the vast number of kids at home now. Teachers are working hard to review apps as quickly as possible, but it will take time to review all apps, so we appreciate your patience. Our initial launch will be limited to the US, to be followed by a global rollout in the coming months.

To help developers better understand what the teachers are looking for, we published a new learning path on Google Play’s Academy for App Success, including findings from Google Play’s research into technology usage by parents and kids.

Rewarding for all

We’re committed to improving the ecosystem and partnering with our developers. We look forward to continuing to work with you to create the best possible experience for children and families on Google Play. For more information on the Teacher Approved program, check out our FAQs.

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Source: Android Developers Blog

Promoting high-quality, teacher-approved kids content on Google Play

Posted by Michael Watson, Product Manager, Google Play

What’s changing

We consulted with academic experts to develop a framework for rating apps for kids. Specially trained teachers across the US will rate apps for kids based on this framework, evaluating things like:

Design quality
Appeal to children
Enrichment potential
Ads & in-app purchases
Age appropriateness

Teacher-approved apps will:

Be eligible to appear in the new Kids section on Google Play
Be eligible for featuring in banners or collections on Google Play
Display the new "Teacher approved" badge
Display information about what teachers found valuable on their app details page

The Google Play store featuring teacher-approved apps

Who’s eligible

Rewarding for all

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Source: Android Developers Blog

Google Play updates and information: Resources for developers

Posted by Sam Tolomei, Business Development Manager, Google Play

Illustration of a person typing on a laptop with tech icons on the side

In these unprecedented times, Google Play's mission to support you, ensure your businesses continue to operate well, and help users get the content they need is more important than ever. With a surge in need for information, communications tools, entertainment, and more, we are striving to ensure our operations run smoothly, and we need your support.

Below, we’ve pulled together some important information to help you maintain business continuity, as well as best practices to help you stay nimble in the changing landscape.

Extended app review times

Like many of you, we've had to manage work disruptions as a result of changing business conditions. This has led to a temporary slowing down of the app review process, which now may take 7 days or longer. As the situation evolves, we will continue to make sure that the most important updates reach users quickly, which may result in fluctuating review times. Certain critical apps may receive prioritized review and may not experience an extended delay in review time. Please check the Google Play Console for the most up-to-date information and guidance.

At the same time, in order to help ensure we are providing users with accurate and timely information relating to COVID-19, we also are prioritizing the review of apps published, commissioned, or authorized by official government entities and public health organizations.

If you want to control when your app goes live, we recommend timed publishing. Just submit your app for review, and once it’s approved, click “Go live” in the Play Console to instantly publish your app. Note: If you already have a release submitted to the production track that is under review, you will not see the “timed publishing” option.

Store listing guidelines

At Google Play we take our responsibility to provide accurate and relevant information for our users very seriously. For that reason, we are currently only approving apps that reference COVID-19 or related terms in their store listing if the app is published, commissioned, or authorized by an official government entity or public health organization, and the app does not contain any monetization mechanisms such as ads, in-app products, or in-app donations. This includes references in places such as the app title, description, release notes, or screenshots.

Removing inappropriate reviews

With the recent increase in traffic, some apps are seeing a spike in inappropriate one-star reviews from users. If you are receiving reviews that are not related to your app experience, you can flag the review in the Play Console. We’ve expanded our ability to assess and remove inappropriate reviews so we can handle your request as quickly as possible.

Subscriptions support

While subscriptions are a large part of many app business models, two groups are currently seeing the largest impact: 1) those whose core businesses have been adversely affected by COVID-19 (such as live event ticketing), and 2) those who provide a public service with their content or services.

For developers whose business value proposition has been affected, features like deferred billing and subscription pauses can help retain users until after the crisis has passed. For developers who want to offer their content or services like medical, online learning, and wellbeing apps at reduced or no cost, features like price changes and refunds through Google Play Billing are available to help.

Learn more best practices in our Medium post.

How we’re helping the community

Google is also committed to helping our community at large. To help small businesses reconnect with their customers, Google is granting $340 million in ad credits to be used across our Google Ads platforms — learn more here.

Here’s what else we’re doing:

We’ve launched a special coronavirus section on Google Play with resources to help users find information from trusted sources.
We've extended Google Play Pass free trials to 30 days so more people can enjoy your apps and games.
We’ve launched a $10 million Distance Learning Fund to support organizations that provide high-quality learning opportunities to children. Developers who are non-profit, education-related enterprises are eligible for this program. Stay tuned for more details from Google.org.
Finally, with your help, we’ve raised over $290,000 for The Center for Disaster Philanthropy’s COVID-19 Response Fund, supporting organizations on the ground with preparedness, containment, response, and recovery. Visit play.google.com/donate to contribute.

As the situation progresses, we will continue to gather more resources to help you. We’re also taking steps to limit changes and barriers because we know you have enough on your plate right now. Please stay tuned for more information, and thank you for being a part of the Google Play community. If you have any other suggestions about how we can support you during this time, please let us know by tweeting at us at @GooglePlayDev with #AskGooglePlay.

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Source: Android Developers Blog

Meet the finalists of the Google Play Indie Games Festival

Posted by Leticia Lago, Head of Developer Marketing, EMEA

At the start of this year we opened submissions for 2020’s Google Play Indie Games Festival - an international competition celebrating incredible indie games from Europe, Japan and South Korea.

We’ve received hundreds of fantastic submissions that showcase the technical abilities and groundbreaking creativity of independent studios. Many thanks to everyone who submitted their game. After some hard choices and late nights, we’re happy to announce our 20 finalists in each region.

Please check out the games below (in alphabetical order); each one is a true work of art. They will be receiving promotions and prizes to help them grow their business. They’ll also be competing in the Finals for the top prizes.

While this is a happy announcement, we must also inform you that we will be unable to hold the Finals as planned on April 25 in Poland, Japan and South Korea due to the COVID-19 situation. We will be postponing the events until further notice, as the health and safety of finalists, jury members, players and others involved is our top priority. Please stay tuned for further announcements.

Europe*

60 Parsecs! by Robot Gentleman

Aisle Trial by Jake Matthews-Belcher

Alien Escape by Korion Games

Alt-Frequencies by Accidental Queens

Bad North by Rawfury

Bounce that Bird! by Affinity Project

Cessabit: a Stress Relief Game by Tepes Ovidiu

Color Spots by UX Apps

Cookies Must Die by Rebel Twins

Demons Never Lie by Maika Hernandez

Doors: Awakening by Big Loop

Faraway: Galactic Escape by Pine Studio

inbento by Afterburn

My Diggy Dog 2 by King Bird Games

The White Door by Rusty Lake

Tiny Tomb: Dungeon Explorer by Tinycorp

Traffix by Infinity Games

Tricky Castle by Team Tricky

Unhatched by Filip Loster

Void Tyrant by Quite Fresh

Japan

Amayadori by CHARON・Yanase

CUBE GARDEN by Fukudanuki

GIGAFALL by Shiki Game Studio

GummyShooter by simatten

Home Fighter by hap Inc.

Matsuro Palette by SleepingMuseum

METBOY! by REBUILD GAMES

Mocha - Dagsaw Puzzle - by Kotoriyama, Inc.

MonsterTrader by Mitsuhiro Okada

Overturn by Katsu Matsuda

Shiritori - The Word Chain Game by Baton

Snowman Story by Odencat

SOUND JOURNEY SCHOOL WANDERER by SOUND JOURNEY

TAP! DIG! MY MUSEUM! by oridio Inc.

Teiji Taisha Online by toru sugitani

The Final Taxi by Zxima.LLC

Uncrowned by NESTOPI Inc.

Wasurenaide, otona ni natte mo by GAGEX Co.,Ltd.

World for Two by Seventh rank

Zelle by Odencat Fuming

South Korea

Castle Defense Online by BlackHammer

CAT THE DJ by CATSBY STUDIO

DiceEmpire by Banjiha Games

Domino City by Bad Beans

DUST by I-eye studio

Electroad by Night Owl Studio

Extreme football by 9M Interactive

From Earth by Kentauros Entertainment

Great Sword - Stickman Action RPG by Olivecrow

Heroes Restaurant by Team Tapas

Little Boy by 39Studio

Magic Survival by LEME

Mayday Memory by StoryTaco.inc

Petrider by Ddookdak studio

Project Mars by Moontm

QV by Izzle

Sand Shark : The Boy and The Sea by GABANGMAN STUDIO

Staroid : Brick breaker shooter by Spring Games

Sword Master Story by CodeCAT

Undestroyed by Keymaker games

The competition was open to indie developers from the following European countries: Austria, Belgium, Belarus, Bulgaria, Croatia, Czech Republic, Denmark, Estonia, Finland, France, Germany, Hungary, Israel, Italy, Latvia, Lithuania, Netherlands, Norway, Poland, Portugal, Romania, Russia, Slovakia, Slovenia, Spain, Sweden, Turkey, Ukraine, and the United Kingdom (including Northern Ireland).

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Source: Android Developers Blog

Run ARM apps on the Android Emulator

Posted by Michael Hazard

As part of the Android 11 developer preview we’ve released Android 11 system images, which are capable of executing ARM binaries with significantly improved performance. Previously, developers who were dependent on ARM libraries and could not build an x86 variant of their app either had to use system images with full ARM emulation, which are much slower than x86 system images when run on x86-based computers, or resort to physical devices. The new Android 11 system images are capable of translating ARM instructions to x86 without impacting the entire system. This allows the execution of ARM binaries for testing without the performance overhead of full ARM emulation.

The new Android 11 (Google APIs) x86 system image supports ARM ABIs, while the older Android Oreo system image does not

Details

The significance of this may require a bit of context, especially if you build apps exclusively with Kotlin or the Java programming language. Unlike Kotlin or the Java programming language, both of which execute on the Android Runtime (ART), any C++ in your Android app compiles directly into machine instructions. This means that it needs to be compiled differently based on the architecture of the target device. Mobile phones tend to have ARM processors; consequently, many C++ dependencies you might add to your app, like a camera barcode scanner library, are only compatible with ARM processors. This is a problem if you develop on a computer with an x86-based processor, as it would prevent you from running your app.

Previously, if you wanted to get around this limitation and execute an app built for ARM on your x86 machine, you would have had to use an emulator system image with full ARM emulation. Due to the overhead of translating an entire system’s worth of ARM instructions to x86, emulator system images with full ARM emulation tend to run much slower than x86-based system images when run on x86 host machines. Additionally, emulator system images with full ARM emulation cannot take advantage of the hardware acceleration and CPU virtualization technologies provided by x86 processors.

The new ARM-compatible Android 11 system images allow the entire system to run x86 natively and take advantage of virtualization technologies as usual. When an app’s process requires an ARM binary, the binary is translated to x86 within that process exclusively. This allows the rest of the process to continue executing in x86, including the Android Runtime (ART), and other performance-critical libraries like libGLES and libvulkan. In addition to this, the translator avoids expensive memory access instrumentation and the associated performance hit by avoiding the execution of low-level hardware-specific libraries. These new emulator system images can be used both locally and on your own continuous integration infrastructure. This is possible thanks to collaboration with ARM Limited.

Going Forward

If you have previously chosen physical devices over the emulator due to the lack of performant ARM support, try out the Android 11 system images, which are now available alongside the Android 11 Developer Preview. These system images can be downloaded in Android Studio via either the SDK Manager or the Android Virtual Device Manager.

Using the Android Virtual Device Manager to create an AVD that runs Android 11

Once you get your app running on the emulator, consider adapting it for Chrome OS. Chrome OS also supports the execution of Android apps built for ARM on x86 laptops. Building for Chrome OS provides access to a substantial ecosystem of larger screen devices, allowing your application to reach even more users globally.

This technology should enable more developers to test with the Android Emulator. That said, we still recommend that developers publish both x86 and ARM ABI variants of their apps to achieve the best physical device performance and reach as many users as possible. Going forward, we plan to roll this technology out across a wider variety of API levels and ensure that it supports testing all use cases that a physical device would. Given that this is a new technology, please let us know of any problems via our Issue Tracker.

Note that the ARM to x86 translation technology enables the execution of intellectual property owned by Arm Limited. It will only be available on Google APIs and Play Store system images, and can only be used for application development and debug purposes on x86 desktop, laptop, customer on-premises servers, and customer-procured cloud-based environments. The technology should not be used in the provision of commercial hosted services.

Java is a registered trademark of Oracle and/or its affiliates.

Source: Android Developers Blog

Google for Games Developer Summit March 2020

Posted by Greg Hartrell, Head of Product Management, Games on Android & Google Play

While we're sorry we didn't get to see you all in person at GDC, we hope you are all staying healthy and safe. As many of us look to press on with work as much as possible, we’d like to share with you what our teams have been working on at the digital Google for Games Developer Summit. We couldn’t be happier with the continued growth of the vibrant Android gaming ecosystem. In fact, Android remains the world's most popular mobile platform with more than 2.5 billion monthly active devices and great news for game developers, we’re seeing more than 1.4 trillion minutes played per month in your games on Google Play. It’s important to us that our platforms are highly useful to every kind of game developer, so our payment system helps games monetize in more than 65 countries. Moreover, we offer our users more than 275 local forms of payment, including more than 180 carrier billing options, with gift cards sold in over 900 thousand unique retail locations worldwide.

Across Android and Google Play, our mission is to deliver the best platform to build, discover, and experience games. Specifically, we’re working on ways to help you increase the reach of your games and manage the fragmentation of the Android ecosystem. We’re also focused on helping you access a wider player base, once you’ve made a great game and are ready to get it out there. Last year, we shared that we’re investing heavily in our games efforts to address your challenges in these areas, and now we are excited to share several new tools and services built specifically with game developers in mind.

Catch up on everything shared at g.co/gamedevsummit.

New Android tools for mobile game development

A major area of investment for us has been making it easier for developers to build and optimize games for Android. Here’s a round-up of several new tools we’re releasing:

Android Studio Profilers: We’ve overhauled our Android Studio System Trace profiler to allow you to inspect and visualize in fine detail how your code is being executed. We also added native memory profiling capabilities so you can see how your game is allocating memory and find memory leaks. Download Android Studio 4.1 Canary and watch the session.
Android Game Development Extension for Visual Studio: We’re introducing a new tool to make it easy to add Android support for your cross-platform games. This integrates easily with existing Visual Studio-based workflows so now you can conveniently generate APKs, deploy to Android devices or an emulator, and debug your Android game from within Visual Studio. Apply for the developer preview and watch the session.
Android GPU Inspector: Our new Android GPU Inspector enables you to look deeply into an Android GPU and see detailed information about your game’s render stages and GPU counters. Now graphics engineers are empowered with information and insights to optimize their game for better frame rates and more battery life. Apply for the developer preview and watch the session.
Game Package Registry for Unity by Google: Our new package registry consolidates various Google APIs, starting with Google Play Billing, Android App Bundles, Play Asset Delivery, Play Instant, and Firebase for Games, all in one place. Learn more and watch the session.
Crytek announces Android support: CRYENGINE is known as a high performance game engine for PCs and game consoles and will be adding a full Android pipeline to their engine this summer. Learn more.

New ways to reach more devices & users

We’ve been working to help developers scale their reach to a growing player-base across the Android ecosystem. Today, we’re introducing a few new tools to help your development process and provide greater insights into your game’s performance.

Google Play Asset Delivery: Introducing a new set of delivery features for games services, building on our App Bundle infrastructure to give you free, dynamic delivery of the right game assets to the right devices at the right time. All of this allows players to get into your game faster while assets are being downloaded, while you cut the costs of hosting and delivering d game resources. Learn more and watch the session.
Android vitals native crash symbolication: Now you can debug your native crashes more easily with support for native symbols in Play Console. Simply upload your native debug symbols to get the benefits in Android Vitals. Apply for the open beta and watch the session.
Android vitals performance insights with Android Performance Tuner: We’re making it possible to optimize your frame rate and fidelity across many devices at scale with new performance insights in Android vitals. For those in our developer preview, you can unlock this by integrating the new Android Performance Tuner into your game: a new library in the Android Game SDK. Apply for the developer preview and watch the session.
Play Billing Library 2 for Unity developers: Game developers using Unity can now access all of Play Billing Library 2's features, such as allowing users to pay with cash and surfacing IAPs outside of the game. This is the best way for Unity developers to prepare for Play’s Billing Library version requirements in 2021. Learn more.

New ways to reach more devices and win go-to-market

The Google Play store is shifting to be more gameplay centric by showing more visuals that demonstrate gameplay and a new system of tags to help users learn more about specific game traits and aid in exploration. Learn how you can ensure your game is of high-quality and leverage various features and new services to help you succeed in your go-to-market activities.

Emphasis on quality: We continue to emphasize high quality gaming experiences across Google Play, to encourage immersive gameplay with strong technical performance and being free of crashes. Learn more.
Pre-registration: Hundreds-of-millions of players use pre-registration campaigns on Google Play each year, making it an effective way to expand the reach on launch. We’ll soon be rolling out day 1 auto-installation for all pre-registration games, to help you build early consumer awareness and capture pre-launch demand.
Play Pass: Late last year we launched Play Pass in the US market as a subscription service providing users with access to hundreds of great apps and games on Google Play, completely free of ads and in-app purchases. Learn more and express interest.

Thanks for your support in continuing to build incredible games. Make sure to try some of the new tools and services we just released and catch the full playlist of mobile developer sessions. If you’re interested in sharing feedback to help shape the development of cutting edge features, apply to join our developer preview programs from Android and Google Play. You can also learn about all of the offerings we have to help game developers building on Android at d.android.com/games.

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Source: Android Developers Blog

Android 11: Developer Preview 2

Posted by Dave Burke, VP of Engineering

Android 11 Dial logo

It’s been a difficult few months for many around the world. The Android team at Google is a global one, and we, like many of you, are learning how to adapt to these extraordinary times. We want to thank you, our developer community, who have given us valuable feedback on Android 11 amidst these circumstances. We hope you, your families and colleagues are all staying well.

Just as many of you are trying to press on with work where possible, we wanted to share the next milestone release of Android 11 for you to try. It’s still an early build, but you can start to see how the OS is enabling new experiences in this release, from seamless 5G connectivity to wrapping your UI around the latest screens, to a smarter keyboard and faster messaging experience.

There’s a lot to check out in Developer Preview 2 - read on for a few highlights and visit the Android 11 developer site for details. Today’s release is for developers only and not intended for daily or consumer use, so we’re making it available by manual download and flash only for Pixel 2, 3, 3a, or 4 devices. To make flashing a bit easier, you can optionally get today’s release from the Android Flash Tool. For those already running Developer Preview 1 or 1.1, we’re also offering an over-the-air (OTA) update to today’s release.

Let us know what you think, and thank you to everyone who has shared such great feedback so far.

New experiences

5G state API - DP2 adds a 5G state API to let you quickly check whether the user is currently on a 5G New Radio or Non-Standalone network. You can use this to highlight your app’s 5G experience or branding when the user is connected. You can use this API together with the 5G dynamic meteredness API and bandwidth estimator API, as well as existing connectivity APIs, to take advantage of 5G’s improved speeds and latency.

Hinge angle for foldables - A top request for foldable devices has been an API to get the angle of the device screen surfaces. Android 11 now supports a hinge angle sensor that lets apps query directly or through a new AndroidX API for the precise hinge angle, to create adaptive experiences for foldables.

Call screening service improvements - To help users manage robocalls, we’re adding new APIs to let call-screening apps do more to help users. In addition to verifying an incoming call’s STIR/SHAKEN status (standards that protect against caller ID spoofing) as part of its call details, call-screening apps can report a call rejection reason. Apps can also customize a system-provided post call screen to let users perform actions such as marking a call as spam or adding to contacts. We’ll have more to share on this soon.

New ops and controls in Neural Networks API - Activation functions control the output of nodes within a neural network. At Google AI, we discovered a swish activation function allowing for faster training time and higher accuracy across a wide variety of tasks. In Android 11, we’re adding a computationally efficient version of this function, the hard-swish op. This is key to accelerating next-generation on-device vision models such as MobileNetV3 which forms the base model for many transfer learning use cases. Another major addition is the Control ops enabling more advanced machine learning models that support branching and loops. Finally, we’ve also added new execution controls to help you minimize latency for common use cases: Asynchronous Command Queue APIs reduce the overhead when running small chained models. See the NDK sample code for examples using these new APIs.

Privacy and security

We’re adding several more features to help keep users secure and increase transparency and control. Give these a try with your apps right away and let us know what you think.

Foreground service types for camera and microphone - in Android 10 we introduced the manifest attribute foregroundServiceType as a way to help ensure more accountability for specific use-cases. Initially apps could choose from “location” and several others. Now in Android 11 we’re adding two new types - “camera” and “microphone”. If your app wants to access camera or mic data from a foreground service, you need to add the foregroundServiceType value to your manifest.

Scoped storage updates- We’re continuing to iterate on our work to better protect app and user data on external storage. In this release we’ve made further improvements and changes, such as support to migrate files from the legacy model to the new scoped storage model, and better management of cached files. Read more here and watch for more enhancements in subsequent updates.

Read more about these and other Android 11 privacy features here.

Polish and quality

Synchronized IME transitions - A new set of APIs let you synchronize your app’s content with the IME (input method editor, aka soft keyboard) and system bars as they animate on and offscreen, making it much easier to create natural, intuitive and jank-free IME transitions. For frame-perfect transitions, a new insets animation listener notifies apps of per-frame changes to insets while the system bars or the IME animate. Additionally, apps can take control of the IME and system bar transitions through the WindowInsetsAnimationController API. For example, app-driven IME experiences let apps control the IME in response to overscrolling the app UI. Give these new IME transitions a try and let us know what other transitions are important to you.

Synchronized IME transition through insets animation listener.

App-driven IME experience through WindowInsetsAnimationController.

Variable refresh rate - Apps and games can now set a preferred frame rate for their windows. Most Android devices refresh the display at 60Hz refresh rate, but some devices support multiple refresh rates, such as 90Hz as well as 60Hz, with runtime switching. On these devices, the system uses the app’s preferred frame rate to choose the best refresh rate for the app. The API is available in both the SDK and NDK. See the details here.

Resume on reboot - Android 11 improves the experience of scheduled overnight over-the-air software updates. Like in previous versions of Android, the device must still reboot to apply the OTA update, but with resume on reboot, apps are now able to access Credential Encrypted (CE) storage after the OTA reboot, without the user unlocking the device. This means apps can resume normal function and receive messages right away - important since OTA updates can be scheduled overnight while the device might be unattended. Apps can still support Direct Boot to access Device Encrypted (DE) immediately after all types of reboot. Give resume on reboot a try by tapping “Restart after 2AM” with your next Developer Preview OTA update, more details here.

Camera support in Emulator - The Android emulator now supports front and back emulated camera devices. The back camera supports Camera2 API HW Level 3 (includes YUV reprocessing, RAW capture). It’s a fully CTS-compliant LEVEL_3 device that you can use to test advanced features like ZSL and RAW/DNG support. The front camera supports FULL level with logical camera support (one logical device with two underlying physical devices). This camera emphasizes logical camera support, and the physical camera devices include narrow and wide field of view cameras. With this emulated camera support, you can build and test with any of the camera features added in Android 11. More details coming soon.

App compatibility

We’re working to make updates faster and smoother by prioritizing app compatibility as we roll out new platform versions. In Android 11 we’ve added new processes, tools, and release milestones to minimize the impact of platform updates and make them easier for developers.

With Developer Preview 2, we’re well into the release and getting closer to Beta. so now is the time to start your compatibility testing and identify any work you’ll need to do. We recommend doing the work early, so you can release a compatible update by Android 11 Beta 1. This lets you get feedback from the larger group of Android 11 Beta users.

When we reach Platform Stability, system behaviors, non-SDK greylists, and APIs are finalized. At this time, plan on doing your final compatibility testing and releasing your fully compatible app, SDK, or library as soon as possible so that it is ready for the final Android 11 release. More on the timeline for developers is here.

You can start compatibility testing on a Pixel 2, 3, 3a, or 4 device, or you can use the Android Emulator. Just flash the latest build, install your current production app, and test all of the user flows. There’s no need to change the app’s targetSdkVersion at this time. Make sure to review the behavior changes that could affect your app and test for impacts.

To help you with testing, we’ve made many of the breaking changes toggleable, so you can force-enable or disable them individually from Developer options or adb. Check out the details here. Also see the greylists of restricted non-SDK interfaces, which can also be enabled/disabled.

App compatibility toggles in Developer Options.

Get started with Android 11

Developer Preview has everything you need to try the Android 11 features, test your apps, and give us feedback. Just download and flash a device system image to a Pixel 2 / 2 XL, Pixel 3 / 3 XL, Pixel 3a / 3a XL, or Pixel 4 / 4 XL device, or set up the Android Emulator through Android Studio. Next, update your Android Studio environment with the Android 11 Preview SDK and tools, see the set up guide for details.

As always, your feedback is crucial, so please continue to let us know what you think — the sooner we hear from you, the more of your feedback we can integrate. When you find issues, please report them here.