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If you are using a physical device such as a Nexus 5X, 6, or 9, you can either update your device through automatic over the air OTA updates or download a system image and flash your device directly. Android Nougat introduces a variety of new features and capabilities, such as Multi-window Support, Notifications enhancements, and Data Saver. The following sections highlight these features and provide links to help you get started using them in your app.
Multi-window mode makes it possible for users to open two apps at once with full multitasking support. These apps can run side-by-side landscape or one-above-the-other portrait in split-screen mode.
Users can drag a divider between the apps to resize them, and they can cut and paste content the between apps. When two apps are presented in multi-window mode, the selected activity continues to run while the unselected activity is paused but still visible. Multi-window mode does not modify the Android activity lifecycle. You can configure how the activities of your Xamarin.
Android app support multi-window mode. For example, you can configure attributes that set the minimum size and the default height and width of your app in multi-window mode. You can use the new Activity. IsInMultiWindowMode property to determine if your activity is in multi-window mode. For example:. The MultiWindowPlayground sample app includes C code that demonstrates how to take advantage of multiple window user interfaces with your app.
For more information about multi-window mode, see the Multi-Window Support. Android Nougat introduces a redesigned notification system. It features a new Direct Reply feature that makes it possible for users to quickly reply to notifications for incoming text messages directly in the notification UI.
Starting with Android 7. Also, developers can customize notification views, leverage system decorations in notifications, and take advantage of new notification templates when generating notifications. When a user receives a notification for incoming message, Android Nougat makes it possible to reply to the message within the notification rather than open up the messaging app to send a reply.
This inline reply feature makes it possible for users to quickly respond to an SMS or text message directly within the notification interface:. To support this feature in your app, you must add inline reply actions to your app via a RemoteInput object so that users can reply via text directly from the notification UI. For example, the following code builds a RemoteInput for receiving text input, builds a pending intent for the reply action, and creates a remote input enabled action:.
The Messaging Service sample app includes C code that demonstrates how to extend notifications with a RemoteInput object. For more information about adding inline reply actions to your app for Android 7. Android Nougat can group notification messages together for example, by message topic and display the group rather than each separate message.
This bundled notifications feature makes it possible for users to dismiss or archive a group of notifications in one action.
The user can slide down to expand the bundle of notifications to view each notification in detail:. To support bundled notifications, your app can use the Builder.
SetGroup method to bundle similar notifications. For more information about bundled notification groups in Android N, see the Android Bundling Notifications topic. Android Nougat makes it possible for you to create custom notification views with system notification headers, actions, and expandable layouts.
For more information about custom notification views in Android Nougat, see the Android Notification Enhancements topic. Beginning with Android Nougat, users can enable a new Data Saver setting that blocks background data usage. This setting also signals your app to use less data in the foreground wherever possible. The ConnectivityManager has been extended in Android Nougat so that your app can check whether the user has enabled Data Saver so that your app can make an effort to limit its data usage when Data Saver is enabled.
To activate the menu of shortcuts, the user long-presses the app icon for a second or more — the menu appears with a quick vibration. Releasing the press causes the menu to remain:. This feature is available only API level 25 or higher. For more information about the new App Shortcuts feature in Android 7. Several Xamarin. Android samples are available to show you how to take advantage of Android Nougat features:.
You can switch the sample app into multi-windows mode to see how it affects the app's lifecycle and behavior. Messaging Service is a simple service that sends notifications using the NotificationCompatManager. It also extends the notification with a RemoteInput object to allow Android Nougat devices to reply via text directly from the notification without having to open an app.
Active Notifications demonstrates how to use the NotificationManager API to tell you how many notifications your application is currently displaying. Scoped Directory Access Demonstrates how to use the scoped directory access API to easily access specific directories. Among the other benefits that apps can take advantage of are:.
Additionally, carrier app integration through Android means that carriers can read the blocked numbers list on the device and perform service-side blocking for the user in order to stop unwanted calls and texts from reaching the user through any medium, such as a VOIP endpoint or forwarding phones.
For more information, see the reference documentation for BlockedNumberContract. The phone app does this by implementing the new CallScreeningService , which allows the phone app to perform a number of actions based on an incoming call's Call. Details , such as:. For more information, see the reference documentation for CallScreeningService. Apps can use a new API to get the user's selected locales and then offer more sophisticated user experiences for multi-locale users — such as showing search results in multiple languages and not offering to translate webpages in a language the user already knows.
Along with multi-locale support, Android 7. It offers more than 25 variants each for commonly used languages such as English, Spanish, French, and Arabic. It also adds partial support for more than new languages.
Apps can get the list of locales set by the user by calling LocaleList. To support the expanded number of locales, Android 7. Make sure that you test and verify that your apps working as expected with the new resource resolution logic. To learn about the new resource-resolution behavior and the best practices you should follow, see Multilingual Support.
If your app supports emojis, follow the guidelines below to take advantage of these emoji-related features.
Migration is easy, and mostly entails simply changing from the com. If you are already using an ICU4J bundle in your apps, switching to the android. Starting with Chrome version 51 on Android 7. This approach improves memory usage on the device itself and also reduces the bandwidth required to keep WebView up to date as the standalone WebView APK will no longer be updated as long as Chrome remains enabled. Starting with Chrome version 51 in Android 7. We're looking for feedback on compatibility and runtime performance in N before enabling multiprocess WebView in a future version of Android.
In this version, regressions in startup time, total memory usage and software rendering performance are expected. Please get in touch with the WebView team on the Chromium bug tracker. Starting with apps targeting Android 7. Currently, the context is carried over for the first page loaded in a new WebView instance. Developers looking to inject Javascript into the WebView should execute the script after the page has started to load. To get started testing pre-release versions of WebView on Android 7.
Please report issues via the Chromium bug tracker so that we can fix them before a new version of WebView is released. Building on top of existing time-shifting APIs, TV input services can control what channel data can be recorded, how recorded sessions are saved, and manage user interaction with recorded content.
Some highlights are below — for a complete list of features, see Android Enterprise feature list. Profile owners targeting the N SDK can specify a separate security challenge for apps running in the work profile. The work challenge is shown when a user attempts to open any work apps.
Successful completion of the security challenge unlocks the work profile and decrypts it if necessary. Profile owners can set distinct passcode policies for the work challenge such as how long the PIN needs to be, or whether a fingerprint can be used to unlock the profile using the setPasswordQuality , setPasswordMinimumLength and related methods.
The profile owner can also set the device lock using the DevicePolicyManager instance returned by the new getParentProfileInstance method. Additionally, profile owners can customize the credentials screen for the work challenge using the new setOrganizationColor and setOrganizationName methods.
On a device with a work profile, users can toggle work mode. When work mode is off the managed user is temporarily shut down, which disables work profile apps, background sync, and notifications. This includes the profile owner application. When work mode is off, the system displays a persistent status icon to remind the user that they can't launch work apps.
The launcher indicates that work apps and widgets are not accessible. Device owners and profile owners can ensure that work apps always connect through a specified VPN.
The system automatically starts that VPN after the device boots. As before, services are indicated to the system by an intent filter matching action android. An application can customize the profile owner and device owner provisioning flows with corporate colors and logos. This makes it much easier for users to discover and configure accessibility features on their devices, including magnification gesture, font size, display size, and TalkBack. With these accessibility features getting more prominent placement, your users are more likely to try your app with them enabled.
Make sure you test your apps early with these settings enabled. Also in Android 7. The new API allows building services with features such as face-tracking, eye-tracking, point scanning, and so on, to meet the needs of those users.
For more information, see the reference documentation for GestureDescription. Direct boot improves device startup times and lets registered apps have limited functionality even after an unexpected reboot. For example, if an encrypted device reboots while the user is sleeping, registered alarms, messages and incoming calls can now continue to notify the user as normal. This also means accessibility services can also be available immediately after a restart.
Direct boot takes advantage of file based encryption in Android 7. The system uses a device-encrypted store for select system data and explicitly registered app data. By default a credential-encrypted store is used for all other system data, user data, apps, and app data. At boot, the system starts in a restricted mode with access to device-encrypted data only, and without general access to apps or data. If you have components that you want to run in this mode, you can register them by setting a flag in the manifest.
The system ensures registered device-encrypted app data is available before unlock. All other data is unavailable until the User confirms their lock screen credentials to decrypt it. By using this tool, you gain additional confidence that your app interacts with keys that reside in secure hardware, even if the device running your app is rooted.
If you use keys from the hardware-backed keystore in your apps, you should use this tool, particularly if you use the keys to verify sensitive information within your app. The tool also allows you to use an off-device service, such as your app's back-end server, to determine and strongly verify the uses and validity of the key pair.
These features provide an additional level of security that protects the key pair, even if someone roots the device or compromises the security of the Android platform running on the device. Note: Only a small number of devices running Android 7.
Before you verify the properties of a device's hardware-backed keys in a production-level environment, you should make sure that the device supports hardware-level key attestation. To do so, you should check that the attestation certificate chain contains a root certificate that is signed by the Google attestation root key and that the attestationSecurityLevel element within the key description data structure is set to the TrustedEnvironment security level.
For more information, see the Key Attestation developer documentation. For more information, see Network security configuration. By default, apps that target Android 7. Apps targeting Android 7. By default, Android Studio 2. Although we recommend applying APK Signature Scheme v2 to your app, this new scheme is not mandatory. If your app doesn't build properly when using APK Signature Scheme v2, you can disable the new scheme. The disabling process causes Android Studio 2.
To sign with only the traditional scheme, open the module-level build. Caution: If you sign your app using APK Signature Scheme v2 and make further changes to the app, the app's signature is invalidated. For this reason, use tools such as zipalign before signing your app using APK Signature Scheme v2, not after. For more information, read the Android Studio documents that describe how to sign an app in Android Studio and how to configure the build file for signing apps using the Android Plugin for Gradle.
The new APIs greatly simplify how your application accesses standard external storage directories, such as the Pictures directory. Additionally, the new APIs simplify the steps a user takes to grant external storage access to your app. When you use the new APIs, the system uses a simple permissions UI that clearly details what directory the application is requesting access to.
For more information, see the Scoped Directory Access developer documentation. You can also provide your own fine-tuned shortcuts lists for the screen. You can do this by overriding the , android. To trigger Keyboard Shortcuts Helper from anywhere in your app, call requestShowKeyboardShortcuts from the relevant activity. This capability is especially useful when a user is using a mouse or touchpad to interact with UI objects.
The default pointer uses a standard icon. This API also includes advanced functionality such as changing the pointer icon's appearance based on specific mouse or touchpad movements. To set a pointer icon, override the onResolvePointerIcon method of the View class. This method uses a PointerIcon object to draw the icon that corresponds to a specific motion event. Performance can fluctuate dramatically for long-running apps, because the system throttles system-on-chip engines as device components reach their temperature limits.
This fluctuation presents a moving target for app developers creating high-performance, long-running apps. To address these limitations, Android 7.
App developers can use these hints to tune apps for a predictable, consistent level of device performance over long periods of time.
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