This is the last article in the #11WeeksOfAndroid series. Thank you for exploring key areas of Android development with us over the past time. Let’s review these exciting contents together:

• #11WeeksOfAndroid
  https://developer.android.google.cn/11weeksofandroid

Contacts and Identity

You can explore how to implement chat shortcuts and Bubbles through chat notifications. We also shared videos about new features in chat and other system UI updates, as well as the Contacts and Chat Developer Documentation. Finally, you can listen to the interview with the system UI team about Contacts and Bubbles in the Android Backstage podcast.

• Chat Notifications
  https://www.youtube.com/watch?v=CKlVSvFyt3s&list=PLWz5rJ2EKKc-Z8NeBXJkf1bzUVhx3fvh4&index=3
• Contacts and Chat Developer Documentation
  https://developer.android.google.cn/preview/features/conversations
• Contacts
  http://androidbackstage.blogspot.com/2020/06/episode-141-discussing-conversations.html
• Bubbles
  http://androidbackstage.blogspot.com/2020/06/episode-140-bubbles.html

The complexity of users and developers makes it difficult to verify identity. To address this issue, we are researching the One Tap and Block Store in the new Google Identity Services Library.

• One Tap
  https://developers.google.com/identity/one-tap/android

If you are interested in learning more about “Identity”, we have also released a video “Exploring Identity in Android: New Login Features”. In this video, Vishal introduces the newly added libraries in the Google Identity System: One Tap and Block Store.

• “Exploring Identity in Android: New Login Features” Video
  https://www.youtube.com/watch?v=KFGthqwDmc0&list=PLWz5rJ2EKKc-Z8NeBXJkf1bzUVhx3fvh4&index=4

The Messenger team from Facebook and the messaging team from Twitter have collaborated with us early on regarding chat features. You can check the relevant cases in the official documentation to learn how these two teams implemented these features.

• Official Documentation: Twitter Team Case Study
  https://android-developers.googleblog.com/2020/06/bringing-twitters-dms-into-android-11s.html
• Official Documentation: Facebook Team Case Study
  https://android-developers.googleblog.com/2020/06/messenger-and-conversations.html

You can learn more through the “Contacts and Identity” Learning Path, Video List, and Previous Articles.

• “Contacts and Identity” Learning Path

  https://developers.android.google.cn/courses/pathways/android-week1-people-identity

• Video List

  https://www.youtube.com/playlist?list=PLWz5rJ2EKKc-V4LzxVebgrymsVxZuJRNu

Machine Learning

We previously announced the winners of the Android Developer Challenge (AndroidDevChallenge). Check out the winner applications that showcase how powerful machine learning helps users solve problems, such as an application for navigation for visually impaired people in crowded spaces, or another application that helps students learn sign language.

• Winners List

  https://android-developers.googleblog.com/2020/06/dev-challenge-winners.html

• Winner Applications

  https://developer.android.google.cn/helpful-innovation

• Navigation for Visually Impaired People

  https://play.google.com/store/apps/details?id=com.br.ml.brpathfinder

• Helping Students Learn Sign Language

  https://play.google.com/store/apps/details?id=com.mangoai.leepi

Recently, we have launched ML Kit as a standalone SDK, and it no longer requires users to use a Firebase account. You just need to add a line of code in the build.gradle file to add ML capabilities to your application.

• ML Kit as a Standalone SDK

  https://android-developers.googleblog.com/2020/06/mlkit-on-device-machine-learning-solutions.html

Another highly anticipated new feature is support for replacing Google models with your own models when performing image labeling and object detection and tracking.

• Image Labeling

  https://developers.google.cn/ml-kit/vision/image-labeling/custom-models/android

• Object Detection and Tracking

  https://developers.google.cn/ml-kit/vision/object-detection/custom-models/android

Learn why it is important to find the unique intersection of user problems and machine learning (ML) advantages, and how the People + AI Guidebook can help you make machine learning (ML) product decisions. You can gain more inspiration from the interview with the Read Reading Team.

• Finding the Unique Intersection of User Problems and Machine Learning (ML) Advantages

  https://android-developers.googleblog.com/2020/06/on-device-ML-design-insights.html

• People + AI Guidebook

  https://pair.withgoogle.com/guidebook/

• Read Reading Team Interview

  https://www.youtube.com/watch?v=fllbN6ZixnE

Another focus is how to greatly simplify the process of adding custom models to Android applications:

https://android-developers.googleblog.com/2020/06/tools-for-custom-ML-models.html

Finally, try our Codelab:

• ML Kit Codelab – Language recognition and text translation using ML Kit and CameraX.

  https://codelabs.developers.google.com/codelabs/mlkit-android-translate/

• Custom Model Codelab – Build an Android application to recognize flowers using TensorFlow Lite Model Maker and Android Studio Machine Learning Model Binding.

  https://codelabs.developers.google.com/codelabs/recognize-flowers-with-tensorflow-on-android-beta/#0

You can learn more through the “Machine Learning” Learning Path, Video List, and Previous Articles.

• “Machine Learning” Learning Path

  https://developer.android.google.cn/courses/pathways/android-week2-machine-learning

• Video List

  https://www.youtube.com/playlist?list=PLWz5rJ2EKKc9znUgvI7lFPE-v5Vw4mGwG

• Previous Articles

  https://android-developers.googleblog.com/2020/06/full-spectrum-of-on-device-machine.html

Privacy and Security

As stated in our previous article – “Privacy and Security”, we are giving users more control and transparency over access to user data.

In Android 11, we introduced several privacy improvements, such as one-time permissions, allowing users to grant applications access to the device’s microphone, camera, or location, but that access is only valid at the time of authorization. You can learn more about how to build privacy-friendly applications using these new changes. You can also watch the video to learn more about Android Security Updates.

• Privacy Improvements
  https://youtu.be/5w5h_UdIiqs
• One-Time Permissions
  https://developer.android.google.cn/preview/privacy/permissions#one-time
• New Changes
  https://www.youtube.com/watch?v=MXlVj-EYgIQ&feature=youtu.be
• Video: Android Security Updates
  https://youtu.be/bsdtRZusbpI

Other notable updates include:

• Permission Auto Reset: If a user has not used an application adapted to Android 11 for a long time, the system will automatically reset all runtime permissions associated with that application and notify the user.

• Automatic Reset
  https://developer.android.google.cn/preview/privacy/permissions#auto-reset

• Data Access Auditing API: In Android 11, developers can access this new API, allowing them to better understand their application’s use of private and protected data. Learn more about the new tools in Android 11 that make your application more private and stable.

• Data Access Auditing API

  https://developer.android.google.cn/preview/privacy/data-access-auditing

• Scoped Storage: In Android 11, all applications targeting API level (Target SDK Level) 30 will be required to use the scoped storage feature. You can watch the video below for more information, or check the Storage FAQ.

• Google Play System Updates: Google Play System Updates were initially launched as part of Project Mainline with Android 10, providing users with faster updates to core operating system components.

• Project Mainline
  https://android-developers.googleblog.com/2019/05/fresher-os-with-projects-treble-and-mainline.html

• Jetpack Biometric Library: This library has now been updated, adding new BiometricPrompt features in Android 11, while supporting backward compatibility.

• Jetpack Biometric Library Update

  https://developer.android.google.cn/jetpack/androidx/releases/biometric#1.1.0-alpha02

• BiometricPrompt

  https://developer.android.google.cn/preview/features#biometric-auth

You can learn more through the “Privacy, Trust, and Security” Learning Path, Video List, Previous Articles, and relevant documentation on Privacy and Security Best Practices.

• “Privacy, Trust, and Security” Learning Path

  https://developer.android.google.cn/courses/pathways/android-week3-privacy-trust-security

• Video List

  https://www.youtube.com/playlist?list=PLWz5rJ2EKKc82becEmw0oxCB0YffWutWB

• Privacy

  https://developer.android.google.cn/privacy/best-practices

• Security

  https://developer.android.google.cn/topic/security/best-practices

Android 11 Compatibility

Before the official release of Android 11, we released several test versions. In the Android 11 Beta 2 version, we added a new milestone called “Platform Stability” to clearly inform developers that all APIs and system behaviors have reached their final state. The third and final Beta version released a few weeks later included the latest fixes and optimizations, and the Android 11 official version was recently released.

Please check the following practical resources to ensure your application is compatible with Android 11:

• Official Documentation: Migrating Applications to Android 11

  https://developer.android.google.cn/preview/migration

• Official Documentation: Behavior Changes that May Affect Applications

  https://developer.android.google.cn/preview/behavior-changes-all

• Detailed Article: Testing Application Compatibility with New Tools in Android 11

• Video: Testing Application Compatibility with Android Studio

  https://www.youtube.com/watch?v=GM7CXRJKpEI

• Video: Testing Platform Changes in Android 11

  https://www.youtube.com/watch?v=82einkyFns4

• Video: Platform Stability and Android Release Timeline

  https://www.youtube.com/watch?v=OzlhNZEAchQ

In the article “Accelerating Android Updates”, we discussed how to maintain the latest operating system’s critical quality by extending Android’s updatability architecture.

• Accelerating Android Updates
  https://android-developers.googleblog.com/2020/07/accelerating-android-updates.html

We also highlighted an exciting case study from Excelliance Tech. Excelliance Tech recently transitioned its LeBian SDK from non-SDK interfaces to stable official APIs, allowing for higher compatibility with the Android operating system over time.

You can learn more through the “Android 11 Compatibility” Learning Path, Video List, and Previous Articles.

• “Android 11 Compatibility” Learning Path
  https://developer.android.google.cn/courses/pathways/android-week4-compatibility
• Video List
  https://www.youtube.com/playlist?list=PLWz5rJ2EKKc-Rkjav7zN93x4gJPOruB26

Development Languages

In Android 11, we officially recommend using coroutines to handle asynchronous work, further improving the developer experience of Kotlin on Android. If you are not familiar with coroutines, please check the following resources:

• Android ❤️ Coroutines: How to Use Kotlin to Manage Asynchronous Tasks

• Coroutine Learning Path

  https://developer.android.google.cn/courses/pathways/android-coroutines

• New Coroutine Developer Guide

  https://developer.android.google.cn/kotlin/coroutines

You can also get the latest case studies and data in the new Kotlin Developer Stories, including the new Google Home case study and the Kotlin State Technology Video in Android. For beginners, we have also launched the new Android Kotlin Basics, welcome to learn!

• Kotlin Developer Stories

  http://developer.android.google.cn/kotlin/stories

• New Google Home Case Study

  https://developer.android.google.cn/stories/apps/google-home

• Kotlin State Technology Video in Android

  https://www.youtube.com/watch?v=AgPj1Q6D–c&vl=ja

• Android Kotlin Basics

  https://developer.android.google.cn/courses/topics/android-basics-kotlin

If you are a Java language developer, you can watch the video “Support for Newer Java APIs” to learn how we provide new OpenJDK libraries across various versions of Android. For Android 11, we also updated the Android runtime to speed up application startup through I/O Prefetching.

• Support for New Java APIs
  https://www.youtube.com/watch?v=heCvGfOGH0s&feature=emb_title
• I/O Prefetching
  https://medium.com/androiddevelopers/improving-app-startup-with-i-o-prefetching-62fbdb9c9020

Android 11 includes updates to the native toolchain, including better Profile-Guided Optimization (PGO) tools and improvements to native dependency management in Android Studio 4.0.

• Profile-Guided Optimization (PGO)
  https://medium.com/androiddevelopers/pgo-for-native-android-applications-1a48a99e95d0
• Improvements to Native Dependency Management in Android Studio 4.0
  https://android-developers.googleblog.com/2020/02/native-dependencies-in-android-studio-40.html

Finally, we will continue to improve the D8 and R8 compilers in Android Studio, providing better support for Kotlin in the R8 Shrinker. You can check the related articles for details.

• R8 Shrinker
  https://developer.android.google.cn/studio/build/shrink-code
• Learn More
  https://medium.com/androiddevelopers/shrinking-kotlin-libraries-and-applications-using-kotlin-reflection-with-r8-6fe0a0e2d115

You can learn more through the “Development Languages” Learning Path, Video List, and Previous Articles.

• “Development Languages” Learning Path
  https://developer.android.google.cn/courses/pathways/android-week5-languages
• Video List
  https://www.youtube.com/playlist?list=PLWz5rJ2EKKc_OyeYcCO97J7kd22mQu38Y

Android Jetpack

Interested in the new features of Jetpack? The new features video of Android Jetpack briefly introduces many updates to the libraries and the corresponding getting started guides.

• Learn More about Hilt and other major releases, including cheat sheets to help you get started, and the process of using Hilt for dependency injection after we migrated our examples. Less boilerplate = more fun.
• Learn More about Paging 3.0, which is a complete rewrite of the library using Kotlin coroutines, adding improved error handling and better transformations.
• Get to know CameraX Beta, and understand how it helps developers handle extreme situations across different devices and operating system versions without hassle.

• New Features Video of Android Jetpack
  https://www.youtube.com/watch?v=R3caBPj-6Sg&t=1s
• Cheat Sheets
  https://medium.com/androiddevelopers/hilt-and-dagger-annotations-cheat-sheet-9adea070e495
• Hilt for Dependency Injection
  https://www.youtube.com/watch?v=B56oV3IHMxg
• Learn More about Paging 3.0
  https://www.youtube.com/watch?v=1cwqGOku2a4
• Get to know CameraX Beta
  https://www.youtube.com/watch?v=LUw_LpTMTto&list=PLWz5rJ2EKKc9wZnLd8uWSK3VpnxS-Jjfo&index=5

This year, we released Navigation 2.3, which brings several major improvements to help you navigate easily between different screens in your application while following Android interface principles.

• Navigation 2.3
  https://www.youtube.com/watch?v=09qjn706ITA&list=PLWz5rJ2EKKc9wZnLd8uWSK3VpnxS-Jjfo&index=6

In Android 11, we are still committed to giving users more control over sensitive permissions. Now, with the new ActivityResult API, common use cases have gained type-safe guarantees. These changes simplify how you request permissions, and we will continue to work towards making permissions simpler in the future.

• ActivityResult API
  https://developer.android.google.cn/training/basics/intents/result

You can also learn about our recently released AppStartup library and the latest changes to WorkManager.

• AppStartup
  https://android-developers.googleblog.com/2020/07/decrease-startup-time-with-jetpack-app.html
• WorkManager
  https://medium.com/androiddevelopers/use-workmanager-for-immediate-background-execution-a57db502603d

You can learn more through the Jetpack Learning Path, Video List, and Previous Articles.

• Jetpack Learning Path
  https://developer.android.google.cn/courses/pathways/android-week6-jetpack?linkId=94749714
• Video List
  https://www.youtube.com/playlist?list=PLWz5rJ2EKKc9wZnLd8uWSK3VpnxS-Jjfo

Android Developer Tools

Recently, we shared the latest updates on Android developer tools and the recent updates on design tools, which you can learn more about by watching the videos:

• Latest Updates on Android Developer Tools

  https://www.youtube.com/watch?v=NMFGuy6TRqk&feature=youtu.be

• Recent Updates on Android Design Tools
  https://www.youtube.com/watch?v=ns67AAuDs4s&feature=youtu.be

There are also two in-depth shares related to design tools:

• Enhancing User Experience of the Design Tools Suite in Android Studio 4.1: Detailed introduction to various changes in the layout editor, resource manager, navigation editor, and updates to keyboard shortcuts to accelerate the interface design process.

  https://medium.com/androiddevelopers/design-tools-suite-ux-enhancements-in-android-studio-4-1-60c11f54ddb0

• Introducing Motion Editor: Helping you quickly understand the newly launched Motion Editor and how to use this latest feature to create animations for your application.

  https://android-developers.googleblog.com/2020/07/introducing-motion-editor.html

You can learn about layout debugging and layout inspector updates. Explore the latest developments in Jetpack Compose Design Tools, and how to use the new database inspector in Android Studio. You are also welcome to explore the latest development tools we provide for Jetpack Hilt in Android Studio.

• Layout Inspector

  https://youtu.be/jyMo18IERLc

• Latest Developments in Jetpack Compose Design Tools

  https://youtu.be/exjL2kGPngI

• How to Use the New Database Inspector in Android Studio

  https://youtu.be/UMc7Tu0nKYQ

• Jetpack Hilt in Android Studio
  https://medium.com/androiddevelopers/dagger-navigation-support-in-android-studio-49aa5d149ec9

We also released four articles introducing the build system in Android developer tools:

• New APIs in Android Gradle Plugin

  https://medium.com/androiddevelopers/new-apis-in-the-android-gradle-plugin-f5325742e614

• Understanding Your Build with the Build Analyzer

  https://medium.com/androiddevelopers/understanding-your-build-with-the-build-analyzer-5c15688ec72e

• Diving Deep into Configuration Caching

  https://medium.com/androiddevelopers/configuration-caching-deep-dive-bcb304698070

• Shrinking Your App with R8

  https://medium.com/androiddevelopers/shrinking-your-app-with-r8-909efac25de4

This article about Android Emulator introduces the latest dynamics of virtual testing. Finally, to learn about the latest changes in performance tools, watch the performance analyzer about System Trace. Additionally, there is more information on C++ Memory Profiling with Android Studio 4.1.

• Android Emulator
  https://medium.com/androiddevelopers/developing-for-android-11-with-the-android-emulator-a9486af2d7ef
• Performance Analyzer about System Trace
  https://www.youtube.com/watch?v=EjmIit_amnE&feature=youtu.be
• C++ Memory Profiling with Android Studio 4.1
  https://medium.com/androiddevelopers/native-memory-profiling-with-android-studio-4-1-33a9e6b44be

You can learn more through the “Android Developer Tools” Learning Path, Video List, and Previous Articles.

• “Android Developer Tools” Learning Path
  https://developer.android.google.cn/courses/pathways/android-week7-developer-tools
• Video List
  https://www.youtube.com/playlist?list=PLWz5rJ2EKKc95jeR9iSR8g_IV5TQhkaC2

Google Play App Distribution and Monetization

We released 3 videos to help you quickly understand the new content and changes in the Google Play Console:

• Bilibili Video Collection Link

  https://www.bilibili.com/medialist/play/ml1042157758

We also shared the latest improvements to app bundles and plan to require that new applications and games be published in this format in the second half of 2021. Developers can now request ratings and reviews from within the app through the new in-app review API!

Don’t forget our more transparent subscription policy, which helps increase user trust in Google Play Billing. We also expanded the feature set to better engage and retain users, and launched Play Billing Library 3, which developers will need to use starting in mid-2021.

In July, we launched Google Play Pass in nine new markets. Developers using both Google Play Pass and Google Play direct billing earn 2.5 times the revenue in the US compared to developers who only use Google Play Pass, and it does not reduce the revenue from the Play Store. You can visit the official documentation for more details and submit your participation intention.

• Nine New Markets
  https://blog.google/products/google-play/google-play-pass-new-apps-games-plans-and-availability/
• Official Documentation
  https://developer.android.google.cn/google-play/guides/play-pass
• Submit Participation Intention
  https://docs.google.com/forms/d/e/1FAIpQLSdmL0YkKrklqZHTcb6sVZLnSXA7Tf5TELppa0mx7tAn1x3AJA/viewform

You can learn more through the “Google Play App Distribution and Monetization” Learning Path, Video List, and Previous Articles.

• “Google Play App Distribution and Monetization” Learning Path
  https://developer.android.google.cn/courses/pathways/android-week8-app-distribution-monetization
• Video List
  https://www.youtube.com/playlist?list=PLWz5rJ2EKKc_WqAZ2HEGMAX7wQGIg5T46

Android, Beyond Phones

We highlighted:

• Android TV: Especially the latest changes in Android TV, we also shared six new ways coming soon and new resources that can help developers start building their first Android TV applications, even diving into new integrations such as Cast Connect and seamless subscriptions.

• Latest Changes in Android TV
  https://www.youtube.com/watch?v=OOV6Ef9zDg0&list=PLWz5rJ2EKKc-Z8NeBXJkf1bzUVhx3fvh4&index=2
• Six New Ways Coming Soon
  https://android-developers.googleblog.com/2020/08/6-new-ways-to-engage-with-users-on.html
• New Resources
  https://medium.com/androiddevelopers/android-tv-best-practices-for-engaging-apps-acd0219ff395
• Cast Connect
  https://www.youtube.com/watch?v=3L-XjCf018s&list=PLWz5rJ2EKKc-Z8NeBXJkf1bzUVhx3fvh4&index=3
• Seamless Subscriptions
  https://www.youtube.com/watch?v=ARuf97ncE4w&list=PLWz5rJ2EKKc-Z8NeBXJkf1bzUVhx3fvh4&index=4

• Android for Cars: We introduced how to reach more drivers through Android for Cars, and the first car equipped with the Android Automotive Operating System and built-in Google apps and services – Polestar 2. As more car manufacturers launch vehicles with this embedded functionality, developers can build media applications on the Android Automotive Operating System more easily with updated documentation and simulators.

• Android for Cars

  https://android-developers.googleblog.com/2020/08/android-for-cars.html

• Android Automotive Operating System

  https://source.android.com/devices/automotive/start/what_automotive

• Polestar 2

  https://www.polestar.com/us/polestar-2/

• Documentation

  https://developer.android.google.cn/training/cars/media/automotive-os

• Simulators

  https://developer.android.google.cn/training/cars/testing#system-images

• Big Screens: ChromeOS.dev is a dedicated resource for technical developers, designers, product managers, and business leaders. Welcome to learn how to extend your applications beyond phones and Android development on Chrome OS best practices.

• ChromeOS.dev
  https://chromeos.dev
• Phones
  https://www.youtube.com/watch?v=ukFjRUIzcaI
• Android Development on Chrome OS
  https://www.youtube.com/watch?v=-e08ixmih20

• Wear OS: Learn about the improvements coming in this platform’s upcoming release this fall.

• Improvements
  https://android-developers.googleblog.com/2020/08/whats-happening-in-wear-os-by-google.html

You can learn more through the Learning Paths, Video Lists, and Previous Articles.

• Android TV Learning Path
  https://developer.android.google.cn/courses/pathways/android-week9-android-tv
• Big Screens Learning Path
  https://developer.android.google.cn/courses/pathways/android-week9-large-screens
• Video List: Android, Beyond Phones
  https://www.youtube.com/playlist?list=PLWz5rJ2EKKc9fvWc2PYBQx1ubxUZNn1kf
• Previous Articles
  https://android-developers.googleblog.com/2020/08/11-weeks-of-android-beyond-phones.html

Games and Media

We shared some game updates and brought you a special episode of The Android Game Developer Show.

• The Android Game Developer Show
  https://www.youtube.com/watch?v=DKVEL0_Gpzs&feature=youtu.be

• Starting with the Android tools for mobile game development, we incorporated an enhanced version of the CPU Profiler’s System Trace view in Android Studio 4.1, and added the Native Memory Profiler. Register to get the developer preview of the Android Game Development Extension and Android GPU Inspector.

• System Trace
  https://medium.com/androiddevelopers/whats-new-in-android-studio-system-trace-5841465c5935
• Native Memory
  https://medium.com/androiddevelopers/native-memory-profiling-with-android-studio-4-1-33a9e6b44be
• Android Game Development Extension
  https://services.google.com/fb/forms/androidgamedevelopmentextension-developerpreview/
• Android GPU Inspector
  https://gpuinspector.dev/

• Dive deep into Android Performance Tuner, learn how it explains annotations, quality levels, and fidelity parameters, and best practices for use.

• Android Performance Tuner
  http://developers.android.google.cn/performance-tuner

• Google Play Asset Delivery also brings app bundles for games. Through the new Codelab, help you smoothly integrate Android Performance Tuner and Google Play Asset Delivery into Unity or native C/C++ games.

• Google Play Asset Delivery
  https://developer.android.google.cn/guide/app-bundle/asset-delivery
• Codelab
  https://medium.com/androiddevelopers/codelabs-for-new-android-game-technologies-486a847eb92e
• Android Performance Tuner
  https://developer.android.google.cn/games/sdk/performance-tuner
• Google Play Asset Delivery
  https://developer.android.google.cn/guide/app-bundle/asset-delivery

• To support your market entry, we launched the open beta of Play Games Services – Friends, allowing you to build and enhance in-game friend networks and giving your game a chance to appear in the new clusters of the Google Play Games app.

• Play Games Services – Friends
  https://developers.android.google.cn/games/services/common/concepts/friends

• The Google Play Console beta showcases a new release management experience and first-day auto-install updates, a new Google Play feature that allows users to request automatic installation of your game during pre-registration. Learn how to optimize the product detail page to fully leverage the greatly enhanced visual experience of Google Play for games, and how the new in-app review API allows you to prompt users to leave comments in the game without returning to the app detail page.

Manage app releases easily

• Request automatic installation of your game during pre-registration
  https://support.google.com/googleplay/android-developer/answer/9859047?_ga=2.231733915.521848568.1594959946-295916848.1580755207
• Optimize the product detail page
  https://support.google.com/googleplay/android-developer/answer/1078870?hl=en
• In-app Review API
  https://developer.android.google.cn/guide/playcore/in-app-review

Ensure your application uses a MediaSession token with a valid MediaStyle to take full advantage of the new media controls in Android 11. You can learn more about supporting media recovery methods, including how to make your application discoverable through MediaBrowserServiceCompat, using EXTRA_RECENT hints to help recover content, and handling onPlay and onGetRoot callbacks. Also, how to use the updated MediaRouter Jetpack Library and UAMP Sample.

• MediaSession
  https://developer.android.google.cn/guide/topics/media-apps/working-with-a-media-session
• MediaStyle
  https://developer.android.google.cn/reference/androidx/media/app/NotificationCompat.MediaStyle
• MediaBrowserServiceCompat
  https://developer.android.google.cn/reference/androidx/media/MediaBrowserServiceCompat
• EXTRA_RECENT
  https://developer.android.google.cn/reference/kotlin/androidx/media/MediaBrowserServiceCompat.BrowserRoot#EXTRA_RECENT:kotlin.String
• onPlay
  https://developer.android.google.cn/reference/kotlin/android/support/v4/media/session/MediaSessionCompat.Callback#onPlay()
• onGetRoot
  https://developer.android.google.cn/reference/android/service/media/MediaBrowserService#onGetRoot(java.lang.String,%20int,%20android.os.Bundle)
• MediaRouter Jetpack Library
  https://developer.android.google.cn/jetpack/androidx/releases/mediarouter
• UAMP Sample
  https://github.com/android/uamp

Finally, we introduced several ways to benefit applications from 5G. Android 11 adds new APIs and updates existing APIs to ensure you have all the tools needed to take full advantage of 5G capabilities, such as enhanced bandwidth estimation APIs, 5G detection capabilities, and new metering tags from cellular operators. Now, the Android Emulator allows you to develop and test these APIs without a 5G device or network connection. More content can be found in our Android 5G Section.

• Benefit Applications from 5G
  https://developer.android.google.cn/training/connectivity/enhance-with-5g
• Bandwidth Estimation API
  https://developer.android.google.cn/preview/features/5g#estimator
• 5G Detection Capabilities
  https://developer.android.google.cn/preview/features/5g#detection
• Metering Tags
  https://developer.android.google.cn/preview/features/5g#meteredness
• Android Emulator
  https://developer.android.google.cn/preview/behavior-changes-all#emulator-5g
• Android 5G Section
  http://developer.android.google.cn/5g

You can learn more through the “Games and Media” Learning Path, Video List, and Previous Articles. Visit the official documentation to get all the tools and resources we provide for game developers.

• “Games and Media” Learning Path
  https://developer.android.google.cn/courses/pathways/android-week10-games-and-media
• Video List
  https://www.youtube.com/playlist?list=PLWz5rJ2EKKc9hyU9KryXE5AFWiRKLCQY4
• Official Documentation
  https://developer.android.google.cn/games

UI and Compose

To help you quickly master Compose, we released four new Codelabs, nine new samples, and related new documentation. The Compose team also released a podcast, along with more introduction videos for your reference.

• Four New Codelabs
  https://developer.android.google.cn/courses/pathways/compose
• Nine New Samples
  https://github.com/android/compose-samples
• New Documentation
  https://developer.android.google.cn/jetpack/compose
• Video: Understanding the Programming Philosophy of Compose
  https://www.youtube.com/watch?v=SMOhl9RK0BA
• Video: Understanding How Jetpack Compose Simplifies Android Interfaces
  https://www.youtube.com/watch?v=DDd6IOlH3io
• Video: “Compose for Existing” Applications
  https://www.youtube.com/watch?v=PjQdFmiDgwk

One of the new features of Android 11 is that applications can seamlessly transition between the opening and closing of the on-screen keyboard. To learn how to add this to your application, check the technical documentation and sample applications.

• Technical Documentation
  https://medium.com/androiddevelopers/animating-your-keyboard-fb776a8fb66d
• Sample Applications
  https://github.com/android/user-interface-samples/tree/master/WindowInsetsAnimation

We recommend that you refer to the Material Design Guidelines to ensure your application runs consistently while ensuring user habits can continue. Learn more about using the Material Design Components (MDC) library, Material Theming (Color, Type, and Shape), dark themes, and Material’s Motion System. If you have not yet migrated to MDC, you can first check our migration guide.

• Recommendations
  https://medium.com/androiddevelopers/we-recommend-material-design-components-81e6d165c2dd
• Material Design Guidelines
  https://material.io/design/introduction
• Material Design Components (MDC) Library
  https://github.com/material-components/material-components-android
• Color
  https://medium.com/androiddevelopers/material-theming-with-mdc-color-860dbba8ce2f
• Type
  https://medium.com/androiddevelopers/material-theming-with-mdc-type-8c2013430247
• Shape
  https://medium.com/androiddevelopers/material-theming-with-mdc-shape-126c4e5cd7b4
• Motion System
  https://medium.com/androiddevelopers/building-beautiful-transitions-with-material-motion-for-android-c1f09bb90bf9/
• Migration Guide
  https://medium.com/androiddevelopers/migrating-to-material-components-for-android-ec6757795351

It can even simplify your migration with new libraries such as the MDC Compose Theme Adapter, which converts MDC XML themes to Compose `MaterialTheme`.

• MDC Compose Theme Adapter
  https://github.com/material-components/material-components-android-compose-theme-adapter
• `MaterialTheme`
  https://developer.android.google.cn/reference/kotlin/androidx/compose/material/package-summary#materialtheme

You can learn more through the Compose Learning Path, “Modern Interfaces” Learning Path, Video List, and Previous Articles.

• Compose Learning Path
  https://developer.android.google.cn/courses/pathways/compose
• “Modern Interfaces” Learning Path
  https://developer.android.google.cn/courses/pathways/android-week11-modern-ui
• Video List
  https://www.youtube.com/playlist?list=PLWz5rJ2EKKc-GZBw-Z4f7i9dBVUbF2vad

Resources

You can get all the theme content on the Android 11 Tab, or check the complete video list of #11WeeksOfAndroid video content. Clicking on the original text to visit the official website can also provide more information on the theme. Please continue to follow us, and we look forward to your feedback. Thank you for being with us!

• Complete Video List
  https://www.youtube.com/user/androiddevelopers
• Bilibili Video Collection
  https://space.bilibili.com/64169458/channel/detail?cid=133709
• Learn More About the Theme
  http://developer.android.google.cn/android11