Android Studio 4.1

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Posted by Scott Swarthout, Product Manager

Today, we’re excited to release the stable version of Android Studio 4.1, with a set of features addressing common editing, debugging, and optimization use cases. A major theme for this release was helping you be more productive while using Android Jetpack libraries, Android’s suite of libraries to help developers follow best practices and write code faster. Based on your feedback we made a number of improvements to the code editing experience with IDE integrations for popular Android libraries.

Some highlights of Android Studio 4.1 include a new Database Inspector for querying your app’s database, support for navigating projects that use Dagger or Hilt for dependency injection, and better support for on-device machine learning with support for TensorFlow Lite models in Android projects. We’ve also made updates to Apply Changes to make deployment faster. Based on your feedback, we’ve made several changes to help game developers with a new native memory profiler and standalone profiling tools.

Product quality continues to be a major focus for the team, and we’ve been hard at work tracking down bugs and performance issues. We’ve heard from many developers that they liked the focus on better performance and reliability, so we’re happy to report that during this release cycle we’ve fixed 2,370 bugs and closed 275 public issues. We stay committed to maintaining high quality since we know that is key to your developer productivity.

Thank you to those who gave your early feedback in preview releases. Your feedback helped us iterate and improve features in Android Studio 4.1. If you are ready for the next stable release, and want to use a new set of productivity features, Android Studio 4.1 is ready to download for you to get started.

Below is a full list of new features in Android Studio 4.1, organized by key developer flows.

Design

Material Design Components updates

Android Studio templates in the create New Project dialog now use Material Design Components (MDC) and conform to updated guidance for themes and styles by default. These changes will make it easier to use recommended material styling patterns and support modern UI features like dark themes.

Material Design Components updates in Project Templates

Updates include:

MDC: Projects depend on com.google.android.material:material in build.gradle. Base app themes use Theme.MaterialComponents.* parents and override updated MDC color and “on” attributes.
Color resources: Color resources in colors.xml use literal names (for example, purple_500 instead of colorPrimary).
Theme resources: Theme resources are in themes.xml (instead of styles.xml) and use Theme.<ApplicationName> names.
Dark theme: Base application themes use DayNight parents and are split between res/values and res/values-night.
Theme attributes: Color resources are referenced as theme attributes (for example, ?attr/colorPrimary) in layouts and styles to avoid hard-coded colors.

Develop

Database Inspector

We wanted to make it easier to inspect, query, and modify your app's databases using the new Database Inspector. To get started, deploy your app to a device running API level 26 or higher and select View > Tool Windows > Database Inspector from the menu bar. Whether your app uses the Jetpack Room library or the Android platform version of SQLite directly, you can now easily inspect databases and tables in your running app or run custom queries.

Because Android Studio maintains a live connection while you’re inspecting your app, you can also modify values using the Database Inspector and see those changes in your running app. If you use the Room persistence library, Android Studio also places run buttons next to each query in the code editor to help you quickly run queries you define in your @Query annotations. Learn more

Inspect, query, and modify your app’s databases with the Database Inspector

Run Android Emulator directly in Android Studio

You can now run the Android Emulator directly in Android Studio. Use this feature to conserve screen real estate, to navigate quickly between the emulator and the editor window using hotkeys, and to organize your IDE and emulator workflow in a single application window. You can manage snapshots and common emulator actions like rotating and taking screenshots from within Studio, but access to the full set of options still requires running the stable emulator. You can opt-in to use this feature by going to File → Settings → Tools → Emulator → Launch in Tool Window.

Run the Android Emulator inside of Android Studio

Dagger Navigation Support

Dagger is a popular library for dependency injection on Android. Android Studio makes it easier to navigate between your Dagger-related code by providing new gutter actions and extending support in the Find Usages window. For example, clicking on the gutter action next to a method that consumes a given type navigates you to the provider of that type. Conversely, clicking on the gutter action navigates you to where a type is used as a dependency. Android Studio also supports navigation actions for dependencies defined with the Jetpack Hilt library. Learn more.

Gutter actions navigation in Android Studio

Navigate between Dagger-related code with gutter actions

Use TensorFlow Lite models

Android developers are using machine learning to create innovative and helpful experiences. TensorFlow Lite is a popular library for writing mobile machine learning models, and we wanted to make it easier to import these models into Android apps. Similar to view binding, Android Studio generates easy-to-use classes so you can run your model with less code and better type safety. The current implementation of ML Model Binding supports image classification and style transfer models, provided they are enhanced with metadata.

To see the details for an imported model and get instructions on how to use it in your app, double-click the .tflite model file in your project to open the model viewer page. Learn more.

View TensorFlow Lite model metadata in Android Studio 4.1

Build & Test

Android Emulator - Foldable Hinge Support

Android Studio

In addition to recently adding 5G cellular testing support, we’ve added support for foldables in the Android emulator. With Android emulator 30.0.26 and above, you can configure foldable devices with a variety of fold designs and configurations. When a foldable device is configured, the emulator will publish hinge angle sensor updates and posture changes, so you can test how your app responds to these form factors. See the Developing for Android 11 with the Android Emulator blogpost to read more.

Apply Changes updates

Faster builds help developers make changes to their app more easily and quickly. To help you be more productive as you iterate on your app, we've made multiple enhancements to Apply Changes for devices running Android 11 or higher.

We've invested heavily in optimizing your iteration speed by developing a method to deploy and persist changes on a device without installing the application. After an initial deploy, subsequent deploys to Android 11 devices using either Apply Code Changes or Apply Changes and Restart Activity are now significantly faster. We’ve also added support for additional code changes in Apply Changes. Now if you add a method, you can deploy those changes to a running app by clicking either Apply Code Changes or Apply Changes and Restart Activity.

Export C/C++ dependencies from AARs

Android Gradle Plugin 4.0 added the ability to import Prefab packages in AAR dependencies. We wanted to extend the capability of this feature to support sharing native libraries as well. AGP version 4.1 enables exporting libraries from your external native build in an AAR for an Android Library project. To export your native libraries, add the following to the android block of your library project's build.gradle file:

buildFeatures {
    prefabPublishing true
}

prefab {
    mylibrary {
      headers "src/main/cpp/mylibrary/include"
    }

    myotherlibrary {
        headers "src/main/cpp/myotherlibrary/include"
    }
}

Symbolication for native crash reports

When a crash or ANR occurs in native code, the system produces a stack trace, which is a snapshot of the sequence of nested functions called in your program up to the moment it crashed. These snapshots can help you to identify and fix any problems in the source, but they must first be symbolicated to translate the machine addresses back into human-readable function names.

If your app or game is developed using native code, like C++, you can now upload debug symbols files to the Play Console for each version of your app. The Play Console uses these debug symbols files to symbolicate your app's stack traces, making it easier to analyze crashes and ANRs. To include debug symbols in your app bundle, add the following line to your project’s build.gradle file:

android.buildTypes.release.ndk.debugSymbolLevel = 'SYMBOL_TABLE'

Optimize

System Trace UI improvements

In Android Studio 4.1 we’ve overhauled System Trace, an optimization tool that gives you a real-time look at how your app is using system resources. We made it easier to select a trace with box selection mode, added a new analysis tab, and added more frame rendering data to help you investigate rendering issues in your app’s UI. Learn more.

Box selection: In the Threads section, you can now drag your mouse to perform a box selection of a rectangular area, which you can zoom into by clicking the Zoom to Selection button on the top right (or use the M keyboard shortcut). When you drag and drop similar threads next to each other, you can select across multiple threads to inspect all of them at once.

Use box selection to more easily select traces.

Summary tab: The new Summary tab in the Analysis panel displays:

Aggregate statistics for all occurrences of a specific event, such as an occurrence count and min/max duration.
Trace event statistics for the selected occurrence.
Data about thread state distribution.
Longest-running occurrences of the selected trace event.

View aggregated statistics in Summary tab of Android Studio 4.1

View aggregated statistics in the Summary tab

Display data: In the Display section, new timelines for SurfaceFlinger and VSYNC help you investigate rendering issues in your app's UI.

Standalone profilers

It's now possible to access the Android Studio Profilers in a separate window from the primary Android Studio window. This is useful when optimizing Android games built with other tools like Unity or Visual Studio.

To run the standalone profilers, do the following:

Make sure the profilers in Android Studio are not already running on your system.
Go to the installation directory and navigate to the bin directory:

Windows/Linux: <studio-installation-folder>\bin

macOS: <studio-installation-folder>/Contents/bin

Depending on your OS, run profiler.exe or profiler.sh

The standalone profiler will allow you to connect to the Android emulator or any connected devices.

Optimize your app with the Standalone Android Studio Profilers

Native Memory Profiler

Tracking native memory usage is important for game developers and other developers using C++ to understand how to optimize their app’s memory consumption. The Android Studio Memory Profiler now includes a Native Memory Profiler for apps deployed to physical devices running Android 10 or later. The Native Memory Profiler tracks allocations/deallocations of objects in native code for a specific time period and provides information about total allocations and remaining system heap size.

To initiate a recording, click Record native allocations at the top of the Memory Profiler window:

Native Memory Profiler window in Android Studio 4.1

View native memory allocations with the Native Memory Profiler

To recap, Android Studio 4.1 includes these new enhancements & features:

Design

Material Design Components updates

Develop

Database Inspector
Run Android Emulator directly in Android Studio
Dagger navigation support
Use TensorFlow Lite models

Build & Test

Android Emulator - Foldable Hinge Support
Apply Changes updates
Export C/C++ dependencies from AARs
Symbolification for native crash reports

Optimize

System Trace UI Improvements
Standalone profilers
Native Memory Profiler

These materials are not sponsored by or affiliated with Unity Technologies or its affiliates. “Unity” is a trademark or registered trademark of Unity Technologies or its affiliates in the U.S. and elsewhere.

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