Android 10 introduces great features and capabilities for users and developers. This document highlights what's available for developers.
To learn about the APIs, read the API diff report or visit the Android API reference — look for APIs that were "added in API level 29". Also be sure to check out Android 10 behavior changes (for apps targeting API level 29 and for all apps), as well as privacy changes, to learn about areas where platform changes may affect your apps.
Android 10 introduces a number of security features, which the following sections summarize.
Improved biometric authentication dialogs
Android 10 introduces the following improvements to biometric authentication support:
- A check for the biometric authentication capability.
- A fallback mechanism that allows a user to authenticate using their device PIN, pattern, or password if they cannot authenticate using their biometric input.
- A hint that tells the system not to require user confirmation after the user has authenticated using an implicit biometric modality. For example, you could tell the system that no further confirmation should be required after a user has authenticated using face authentication.
Run embedded DEX code directly from APK
As of Android 10, you can tell the platform to run embedded DEX code directly from your app’s APK file. This option can help prevent an attack if an attacker ever managed to tamper with the locally compiled code on the device.
For more information, see Run embedded DEX code directly from APK.
TLS 1.3 support
Android 10 adds support for TLS 1.3. TLS 1.3 is a major revision to the TLS standard that includes performance benefits and enhanced security. Our benchmarks indicate that secure connections can be established as much as 40% faster with TLS 1.3 compared to TLS 1.2.
For more details about our implementation of TLS 1.3, see the TLS section within the behavior changes for all apps page.
Public Conscrypt API
As of Android 10, the Conscrypt security provider includes a public API for TLS functionality.
The collection of classes under
android.net.ssl contain static
methods to access functionality that isn't available from the generic
javax.net.ssl APIs. The names for these classes can be inferred as the plural
of the corresponding
javax.net.ssl class. For example, code that operates on
javax.net.ssl.SSLSocket can instead use methods from
Android 10 includes several improvements related to networking and connectivity.
Wi-Fi network connection API
Android 10 adds support for peer-to-peer connections. This
feature enables your app to prompt the user to change the access point that the
device is connected to by using
to describe properties of a requested network. The peer-to-peer connection is
used for non-network-providing purposes, such as bootstrapping configuration for
secondary devices like Chromecast and Google Home hardware.
For more information, see Wi-Fi Network Request API for peer-to-peer connectivity.
Wi-Fi network suggestion API
Android 10 adds support for your app to prompt the user to connect to a Wi-Fi access point. You can supply suggestions for which network to connect to. The platform will ultimately choose which access point to accept based on the input from your and other apps.
For more information about this feature, see Wi-Fi suggest.
Improvements to Wi-Fi high-performance and low-latency modes
Android 10 allows you to provide a hint to the underlying modem to minimize latency.
Android 10 extends the Wi-Fi lock API to effectively support high-performance mode and low-latency mode. Wi-Fi power save is disabled for high-performance and low-latency mode, and further latency optimization may be enabled in low-latency mode, depending on modem support.
Low-latency mode is only enabled when the application acquiring the lock is running in the foreground and the screen is on. The low-latency mode is especially helpful for real-time mobile gaming applications.
Specialized lookups in DNS resolver
Android 10 adds native support for specialized DNS lookups using
both cleartext lookups and DNS-over-TLS mode. Previously, the platform DNS
resolver supported only A and AAAA records, which allow looking up only the IP
addresses associated with a name, but did not support any other record types.
DnsResolver API provides generic,
asynchronous resolution, enabling you to look up
NAPTR, and other
record types. Note that parsing the response is left to the app to perform.
For NDK-based apps, see
Wi-Fi Easy Connect
Android 10 enables you to use Easy Connect to provision Wi-Fi
credentials to a peer device, as a replacement of WPS which has been deprecated.
Apps can integrate Easy Connect into their setup and provisioning flow by using
For more information on this feature, see Wi-Fi Easy Connect.
Wi-Fi Direct connection API
WifiP2pManager API classes have updates in Android 10
to support fast connection establishment capabilities to Wi-Fi Direct using
predetermined information. This information is shared via a side channel, such
as Bluetooth or NFC.
The following code sample shows how to create a group using predetermined information:
val manager = getSystemService(Context.WIFI_P2P_SERVICE) as WifiP2pManager val channel = manager.initialize(this, mainLooper, null) // prefer 5G band for this group val config = WifiP2pConfig.Builder() .setNetworkName("networkName") .setPassphrase("passphrase") .enablePersistentMode(false) .setGroupOperatingBand(WifiP2pConfig.GROUP_OWNER_BAND_5GHZ) .build() // create a non-persistent group on 5GHz manager.createGroup(channel, config, null)
WifiP2pManager manager = (WifiP2pManager) getSystemService(Context.WIFI_P2P_SERVICE); Channel channel = manager.initialize(this, getMainLooper(), null); // prefer 5G band for this group WifiP2pConfig config = new WifiP2pConfig.Builder() .setNetworkName("networkName") .setPassphrase("passphrase") .enablePersistentMode(false) .setGroupOperatingBand(WifiP2pConfig.GROUP_OWNER_BAND_5GHZ) .build(); // create a non-persistent group on 5GHz manager.createGroup(channel, config, null);
To join a group using credentials, replace
manager.createGroup() with the
manager.connect(channel, config, null)
manager.connect(channel, config, null);
Bluetooth LE Connection Oriented Channels (CoC)
Android 10 enables your app to use BLE CoC connections to transfer larger data streams between two BLE devices. This interface abstracts Bluetooth and connectivity mechanics to simplify implementation.
Android 10 includes several improvements related to telephony.
Call quality improvements
Android 10 adds the ability to collect information about the quality of ongoing IP Multimedia Subsystem (IMS) calls, including quality to and from the network, on devices that support the feature.
Call screening and caller ID
Android 10 provides your app with a means to identify calls not
in the user's address book as potential spam calls, and to have spam calls
silently rejected on behalf of the user. Information about these blocked calls
is logged as blocked calls in the call log to provide greater transparency to
the user when they are missing calls. Use of this API eliminates the requirement
READ_CALL_LOG permissions from the user to provide call screening
and caller ID functionality.
Call redirection service API
Android 10 changes how call intents are handled. The
NEW_OUTGOING_CALL broadcast is deprecated and is replaced with the
CallRedirectionService API. The
CallRedirectionService API provides
interfaces for you to modify outgoing calls made by the Android platform. For
example, third-party apps might cancel calls and reroute them over VoIP.
Improvements in creating files on external storage
In addition to introducing scoped storage, Android 10 adds the following capabilities related to external storage:
- You can use the
IS_PENDINGflag to give your app exclusive access to a media file as it's written to disk.
- If you're aware of a specific location where files should be stored, you can provide the system a hint for where to store the newly-written files.
- Each external storage device has a unique volume name.
Media and graphics
Android 10 introduces the following new media and graphics features and APIs:
Sharing audio input
Android 10 adds the ability for two apps to share the audio input simultaneously. For full information, see Sharing audio input.
Audio playback capture
Android 10 gives an app the ability to capture audio playback from other apps. For full information, see Playback capture.
Seekbar in MediaStyle notifications
Starting with Android 10,
MediaStyle notifications display a seekbar. The seekbar shows
the playback progress from
and in some cases the seekbar can be used to seek to a location in the playing
program. The seekbar appearance and behavior is controlled by these rules:
- The seekbar appears if there is an active
MediaSessionand its duration (specified by
MediaMetadata.METADATA_KEY_DURATION) is greater than zero. This means that the bar does not appear for indeterminate streams like livestreams and radio broadcasts.
- If the session implements
ACTION_SEEK_TOthe user can drag the seekbar to control the playback location.
Native MIDI API
The Android Native MIDI API (AMidi) gives application developers the ability to send and receive MIDI data with C/C++code, integrating more closely with their C/C++ audio/control logic and minimizing the need for JNI.
For more information, see Android Native MIDI API.
Android 10 adds methods to
MediaCodecInfo that reveal more
information about a codec.
For more information, see Media codecs.
When devices get too warm, they may throttle the CPU and/or GPU, and this can affect apps and games in unexpected ways. Apps using complex graphics, heavy computation, or sustained network activity are more likely to hit issues, and those can vary across devices based on chipset and core frequencies, levels of integration, and also device packaging and form factor.
In Android 10, apps and games can use a thermal API to monitor changes on the device and take action to maintain lower power usage to restore normal temperature. Apps register a listener in PowerManager, through which the system reports ongoing thermal status ranging from light and moderate to severe, critical, emergency, and shutdown.
When the device reports thermal stress, apps and games can help by backing off ongoing activities to reduce power usage on various ways. For example, streaming apps could reduce resolution/bit rate or network traffic, a camera app could disable flash or intensive image enhancement, a game could reduce frame rate or polygon tesselation, a media app could reduce speaker volume, and a maps app could turn off GPS.
The thermal API requires a new device HAL layer—it's currently supported on Pixel devices running Android 10 and we’re working with our device-maker partners to bring broad support to the ecosystem as quickly as possible.
Camera and images
Android 10 introduces the following new camera- and image-related features:
Monochrome camera support
Android 9 (API level 28) first introduced monochrome camera capability. Android 10 adds several enhancements to monochrome camera support:
- Y8 stream format support to improve memory efficiency.
- Support for monochrome raw DNG capture.
- Introduction of MONO and NIR CFA enumerations to distinguish between regular monochrome camera and near infrared cameras.
You may use this feature to capture a native monochrome image. A logical multi-camera device may use a monochrome camera as a physical sub-camera to achieve better low-light image quality.
Dynamic Depth Format
Starting in Android 10, cameras can store the depth data for an image in a separate file, using a new schema called Dynamic Depth Format (DDF). Apps can request both the JPG image and its depth metadata, using that information to apply any blur they want in post-processing without modifying the original image data.
To read the specification for this format, see Dynamic Depth Format.
High Efficiency Image File format
High Efficiency Image File (HEIF) format is a standard image and video format that introduces higher-quality encoding and smaller file size when compared to other file formats.
For more information about the file format, see HEIC.
Improvements in multi-camera
Android 10 improves the fusing of multiple cameras into a single logical camera, a feature introduced in Android 9 (API level 28). The following were added to the Camera2 API:
isSessionConfigurationSupported(SessionConfiguration sessionConfig)—enables you to query whether or not the passed session configuration can be used to create a camera capture session.
LOGICAL_MULTI_CAMERA_ACTIVE_PHYSICAL_ID—enables you to determine the ID of the active physical camera backing a logical camera device. You can use the IDs returned to request logical streams and physical subcamera streams to achieve better power efficiency.
Accessibility services API
Android 10 introduces the following new accessibility service features and APIs:
AccessibilityNodeInfo entry key flag
As of Android 10, you can call
to determine whether a given
AccessibilityNodeInfo represents a text entry key
that's part of a keyboard or keypad.
Accessibility dialog spoken feedback
In case where users need to perform the accessibility shortcut to start an accessibility service, Android 10 allows the dialog to be accompanied by a text-to-speech prompt if the service requests it.
Accessibility shortcut when gesture navigation enabled
When the gesture navigation feature is enabled in Android 10, the accessibility button isn't visible or selectable. To access the accessibility services menu, users must perform one of the following gestures:
- Two-finger swipe up.
- Two-finger swipe up and hold.
Accessibility shortcut for physical keyboards
In Android 10, users can trigger the accessibility shortcut on a physical keyboard by pressing Control+Alt+Z.
Soft keyboard controller enhancement
In Android 10, accessibility services can request that the soft keyboard be displayed even when the device detects a hard keyboard attached. Users can override this behavior.
User-defined accessibility timeouts
Android 10 introduces the
API. This method provides support for user-defined timeouts for interactive and
non-interactive UI elements. The return value is influenced by both user
preferences and accessibility service APIs.
Android 10 contains the following improvements to the autofill service.
Compatibility-related autofill requests
You can use the
flag to determine whether an autofill request was generated via compatibility
Save username and password simultaneously
You can support cases where an application uses multiple activities to
display username, password, and other fields by using the
User interaction with the Save UI
You can show and hide a password field in a save dialog by setting an action listener on the dialog and changing the visibility of the corresponding password remote view.
Support for updating datasets
Autofill can update existing passwords. For example, if a user has already stored a password, and they save a new password, Autofill prompts the user to update the existing password instead of saving a new one.
Field Classification improvements
Android 10 contains the following improvements to the Field Classification API.
constructor has changed to better align to the
Allow a Value to be mapped to multiple types of Category IDs
Android 10, you can now map a value to multiple types of category IDs. In
previous releases, an exception was thrown if a value was added more than once.
Improved support for credit card numbers
Field classification can now detect four-digit numbers as the last four digits of a credit card number.
Support for app-specific field classification
Android 10 adds
which allows you to set app-specific user data for the duration of the session.
This helps the autofill service detect types for fields with app-specific
UI and system controls
Android 10 provides the following user-interface improvements:
Support JVMTI PopFrame caps
Android 10 adds support for the
capability in the Android JVMTI implementation. When debugging, this feature
allows you to re-run functions after pausing at a breakpoint and adjusting
locals, globals, or implementation of a function. For more information, see
Oracle's Pop Frame reference page.
Surface control API
Android 10 provides a
for low-level access to the system-compositor
most users, SurfaceView is the correct way to leverage the compositor. The
SurfaceControl API can be useful in certain cases, for example:
- Synchronization of multiple surfaces
- Cross-process surface embedding
- Lower-level lifetime management
SurfaceControl API is available in both
SDK and NDK bindings.
The NDK implementation includes an API for manual exchange of buffers with the
compositor. This provides an alternative for users who have run up against the
WebView hung renderer detection
- Define your own subclass and implement its
- Attach an instance of your
WebViewRenderProcessClientto one or more
- If the
WebViewbecomes unresponsive, the system calls the client's
onRenderProcessUnresponsive()method, passing the
WebViewRenderProcess. (If the
WebViewis single-process, the
WebViewRenderProcessparameter is null.) Your app can take appropriate action, such as showing a dialog box to the user asking if they want to halt the rendering process.
WebView remains unresponsive, the system calls
periodically (no more than once every five seconds), but takes no other action.
WebView becomes responsive
again, the system calls
onRenderProcessResponsive() just once.
Android 10 introduces Settings Panels, an API which allows apps to show settings to users in the context of their app. This prevents users from needing to go into Settings to change things like NFC or Mobile data in order to use the app.
For example, suppose a user opens a web browser while their device is in airplane mode. Prior to Android 10, the app could only display a generic message asking the user to open Settings to restore connectivity. With Android 10, the browser app can display an inline panel showing key connectivity settings such as airplane mode, Wi-Fi (including nearby networks), and mobile data. With this panel, users can restore connectivity without leaving the app.
To display a settings panel, fire an intent with the one of the following
val panelIntent = Intent(Settings.Panel.settings_panel_type) startActivityForResult(panelIntent)
Intent panelIntent = new Intent(Settings.Panel.settings_panel_type); startActivityForResult(panelIntent);
settings_panel_type can be one of:
- Shows settings related to internet connectivity, such as Airplane mode, Wi-Fi, and Mobile Data.
- Shows Wi-Fi settings, but not the other connectivity settings. This is useful for apps that need a Wi-Fi connection to perform large uploads or downloads.
- Shows all settings related to near-field communication (NFC).
- Shows volume settings for all audio streams.
Android 10 provides a number of improvements to sharing:
Sharing Shortcuts API
Instead of retrieving results reactively on demand, the Sharing Shortcuts API
lets apps publish direct share targets in advance. This is how
Since the two APIs are similar, we have expanded the
API to make using both
features easier. With the Sharing Shortcuts API, you can directly assign
categories or people to a share target. The share targets persist in the system
until the same app updates them or the app is uninstalled.
The older Direct Share mechanism still works, but apps that use it have a lower priority than apps using the Sharing Shortcuts API.
adds and enhances methods to provide additional info about the share target.
Direct share targets
You can publish a dynamic shortcut as a Direct Share Target. See Publish direct share targets.
is a new AndroidX API that provides backwards compatibility with the old DirectShare API. This
is the preferred way to publish share targets.
When an app shares text content, it can show an optional preview of the content in the Sharesheet UI.
Android 10 offers a Dark theme that applies to both the Android system UI and apps running on the device. For full information, see Dark theme.
Foreground service types
Android 10 introduces the
XML manifest attribute, which you include in the definition of several specific
services. It's possible, though rarely appropriate, to assign multiple
foreground service types to a particular service.
The following table shows the different foreground service types and the services where it's appropriate to declare a specific type:
|Foreground service type||Example use case for a service that should declare this type|
|Monitor a wearable fitness tracker|
|Download files from a network|
|Continue a user-initiated action|
|Play an audio book, podcast, or music|
|Record a video of the device's display over a short period of time|
|Handle ongoing phone call|
Android 10 includes the following updates for Kotlin development.
Nullability annotations for libcore APIs
Android 10 improves the coverage of nullability annotations in the SDK for libcore APIs. These annotations enable app developers who are using either Kotlin or Java nullability analysis in Android Studio to get nullness information when interacting with these APIs.
Normally, nullability contract violations in Kotlin result in compilation
errors. To ensure compatibility with your existing code, only the
@RecentlyNonNull annotations are added. This means
that nullability violations result in warnings instead of errors.
In addition, any
@RecentlyNonNull annotations that were
added in Android 9 are changing to
This means that, in Android 10 and higher, nullability violations
lead to errors instead of warnings.
For more information about annotation changes, see Android Pie SDK is now more Kotlin-friendly on the Android Developers Blog.
Android 10 includes the following NDK changes.
Improved debugging of file descriptor ownership
Android 10 adds fdsan, which helps you find and fix file descriptor ownership issues more easily.
Bugs related to mishandling of file descriptor ownership, which tend to manifest as use-after-close and double-close, are analogous to the memory allocation use-after-free and double-free bugs, but tend to be much more difficult to diagnose and fix. fdsan attempts to detect and/or prevent file descriptor mismanagement by enforcing file descriptor ownership.
Applications built using the NDK with a minimum API level 29 can use ELF TLS
emutls. Dynamic and static linker support has been added to support
this method of handling thread-local variables.
For apps built for API level 28 and lower, improvements have been implemented
libgcc/compiler-rt to work around some
For more information, see Android changes for NDK developers.
Android 10 includes the following runtime change.
Mallinfo-based garbage collection triggering
When small platform Java objects reference huge objects in the C++ heap, the C++ objects can often be reclaimed only when the Java object is collected and, for example, finalized. In previous releases, the platform estimated the sizes of many C++ objects associated with Java objects. This estimation was not always accurate and occasionally resulted in greatly increased memory usage, as the platform failed to garbage collect when it should have.
In Android 10, the garbage collector (GC) tracks the total size
of the heap allocated by system
malloc(), ensuring that large
allocations are always included in GC-triggering calculations. Apps interleaving
large numbers of C++ allocations with Java execution might see an increase in
garbage collection frequency as a result. Other apps might see a small decrease.
Testing and debugging
Android 10 includes the following improvements for testing and debugging.
Improvements for on-device system tracing
As of Android 10, you can specify limits for the size and duration of a trace when you perform an on-device system trace. When you specify either value, the system performs a long trace, periodically copying the trace buffer to the destination file while the trace is recorded. The trace completes when the size or duration limits that you specified are reached.
Use these additional parameters to test different use cases than you would test with a standard trace. For example, you might be diagnosing a performance bug that only occurs after your app has been running for a long period of time. In this case, you could record a long trace over an entire day, and then analyze the CPU scheduler, disk activity, app threads, and other data in the report to help you determine the cause of the bug.
In Android 10 and higher, trace files are saved in a format that can be opened with Perfetto, an open-source project for performance instrumentation and tracing. You can convert Perfetto trace files to the Systrace format.
Android 10 provides additional text classification functionality in the
TextLanguage objects consist of a list of ordered pairs. Each pair
contains a locale and a corresponding confidence score for the classification.
Suggested conversation actions
Smart replies/actions in notificationsAndroid 9 introduced the ability to display suggested replies within a notification. Android 10 expands on this with the ability to include suggested intent-based actions. Furthermore, the platform is able to generate these suggestions automatically. Apps can still provide their own suggestions, or opt out of system-generated suggestions.
The API used to generate these replies is part of
and has also been directly exposed to developers in Android 10.
Please read the section on TextClassifier improvements
for more information.
If your app provides its own suggestions, the platform doesn't generate any
automatic suggestions. If you don't want your app's notifications to display
any suggested replies or actions, you can opt out of system-generated replies
and actions by using