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.
Released as the final Android 7. Revision 2 November Incremental update. Revision 1 October Initial release for Android 7. Revision 1 August Initial release for Android 7. Android SDK Tools Android 6. Revision 2 November Fixed bugs in the layout rendering library used by Android Studio.
Revision 1 August Initial release for Android 6. Android 5. Revision 1 March Initial release for Android 5. Revision 2 December Updated layouts in the Support Library and fixed various issues. Revision 1 October Initial release for Android 5. Android 4. Revision 2 October Updated the rendering library. Revision 1 June Initial release for Android Wear.
Revision 2 December Maintenance release. Revision 1 October Initial release. Revision 2 August Maintenance update. Revision 1 July Initial release.
Revision 2 February Maintenance update. 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. App developers can try out this new API in Android 7. To use this feature, set the sustained performance window flag for the window you want to run in sustained performance mode.
Set this flag using the Window. The system automatically disables this mode when the window is no longer in focus. There are a number of performance enhancements, including access to an exclusive CPU core for VR apps. Within your apps, you can take advantage of intelligent head-tracking, and stereo notifications that work for VR. Most importantly, Android 7. For complete information about building VR apps for Android 7.
When listing individual printers, a print service can now set per-printer icons in two ways:. In addition, you can provide a per-printer activity to display additional information by calling setInfoIntent.
You can indicate the progress and status of print jobs in the print job notification by calling setProgress and setStatus , respectively. The data returned is equivalent to that which adb shell dumpsys gfxinfo framestats displays, but is not limited to the past frames. This API allows collection of data at a much higher granularity than does adb shell dumpsys gfxinfo. You can use this capability to gather performance data and catch regressions in UI performance for real use cases within an app.
The API provides a FrameMetrics object, which contains timing data that the rendering subsystem reports for various milestones in a frame lifecycle. In previous versions of Android, your app could use the Storage Access Framework to allow users to select files from their cloud storage accounts, such as Google Drive. However, there was no way to represent files that did not have a direct bytecode representation; every file was required to provide an input stream.
This article provides an outline of the features introduced in AndroidNougat, explains how to prepare Xamarin. Android for Android Nougatdevelopment, and provides links to sample applications that illustratehow to use Android Nougat features in Xamarin.
Android apps. Android Nougatis Google's followup to Android 6. Androidprovides support for Android 7. Android apps whenyou use Xamarin. Android 7. For more information about Android 7. For a list of known Xamarin. Android Nougat provides many new features of interest to Xamarin. These features include:. Multi-window support — This enhancement makes it possiblefor users to open two apps on the screen at once.
Notification Enhancements — The redesigned notificationssystem in Android Nougat includes a Direct Reply feature that allowusers to quickly respond to text messages directly from thenotification UI.
Also, if your app creates notifications forreceived messages, the new bundled notifications feature canbundle notifications together as a single group when more than onemessage is received. Data Saver — This feature is a new system service thathelps reduce cellular data use by apps; it gives users control overhow apps use cellular data.
This article explains how to get started building apps with AndroidNougat to try out the new features and plan migration or feature workto target the new Android Nougat platform. If you are using Visual Studio for Mac, version 6. Android — Xamarin. Java Developer Kit — Xamarin Android 7. Android, you mustdownload and install the latest tools and SDK packages before you cancreate an Android Nougat project:.
If you also need features that are currently availableonly in the Alpha or Beta channel, you can switch to the Alpha or Betachannel the Alpha and Beta channels also provide support for Android7. For information about how to change theupdates releases channel, seeChanging the Updates Channel.
To create a project with Xamarin Android 7. Create a new Xamarin. Android project. Android projects. When you create an Android project, you must configure the versionsettings to target Android 7. For example, to target yourproject for Android 7. It isrecommended that you set your target framework level to API 24 orlater. Currently you must set the Minimum Androidversion to Android 7. If you are using an emulator, start the Android AVD Manager and create a newdevice using the following settings:.
If you are using a physical device such as a Nexus 5X, 6, or 9, you caneither update your device through automatic over the air OTA updatesor 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 DataSaver. The following sections highlight these features and providelinks to help you get started using them in your app.
Multi-window mode makes it possible for users to open two apps at oncewith 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 cancut and paste content the between apps.
When two apps are presented inmulti-window mode, the selected activity continues to run while theunselected activity is paused but still visible. Multi-windowmode does not modify the Android activity lifecycle.
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