Android 8.1 preview download

The FingerprintManager class has introduced the following error codes:. Content and code samples on this page are subject to the licenses described in the Content License. All Android releases Android 9. Features and APIs. Behavior changes. Android Developers. Android Oreo Go edition Android Go is our initiative to optimize the Android experience for billions of people coming online around the world.

Features in the Android Oreo Go edition configuration include: Memory optimizations. Improved memory usage across the platform to ensure that apps can run efficiently on devices with 1GB or less RAM. Flexible targeting options. New hardware feature constants to let you target the distribution of your apps to normal or low-RAM devices through Google Play. Google Play. While all apps will be available on devices running Android Oreo Go edition , Google Play will give visibility to apps specifically optimized by developers to provide a great experience for billions of people with the building for billions guidelines.

Autofill framework updates Android 8. Notifications Android 8. Alert sounds that exceed this rate aren't queued and are lost. This change doesn't affect other aspects of notification behavior and notification messages still post as expected. In Android 8. You can have your app automatically perform a particular action—such as going back to safety—each time it encounters a URL that Safe Browsing classifies as a known threat.

By joining Download. Android O introduces a variety of new features and capabilities for users and developers. This document highlights what's new for developers. Make sure to check out Android O Behavior Changes to learn about areas where platform changes may affect your apps.

The API supports on- device model creation, compilation, and execution. Apps typically do not use NNAPI directly; instead, NNAPI is meant to be called by machine learning libraries, frameworks, and tools that let developers train their models and deploy them on Android devices. Android 8. These constants enable the Play store to promote a better user experience by highlighting apps especially well-suited to the capabilities of a given device.

The Developer Preview adds support for custom descriptions that the Android System shows in the autofill save UI instead of the original representation of the data. This is useful, for example, when you want to mask a credit card number and show only the last four digits. To learn more, see the CustomDescription class. The Developer Preview allows you to specify a Validator object that your app can use to decide if the Android System should show the autofill save UI.

This functionality is provided by the setValidator method of the SaveInfo. Builder class. The BaseAdapter class in the Developer Preview includes the setAutofillOptions method, which allows you to provide string representations of the values in an adapter.

This is useful for spinner controls that dynamically generate the values in their adapters. For example, you can use thesetAutofillOptions method to provide a string representation of the list of years that the users can choose as part of a credit card expiration date.

Autofill services can use the string representation to appropriately fill out the views that require the data. Additionally, the AutofillManager class includes the notifyViewVisibilityChanged View, int, boolean method that you can call to notify the framework about changes in the visibility of a view in a virtual structure.

There's also an overload of the method for non virtual structures. However, non virtual structures usually don't require you to explicitly notify the framework because the method is already called by the View class. This change is backward-compatible, as Editable implements CharSequence. The Editable interface provides valuable additional functionality. For example, because Editable also implements the Spannable interface, you can apply markup to content within an instance of EditText.

By default, the WebView shows an interstitial, as shown in Figure 1, warning the user of the known threat and giving them the option to load the URL anyway or return to a previous page that's safe.

In Android 8. Note: For optimal protection against known threats, wait until you've initialized Safe Browsing before you invoke a WebView object's loadUrl method. The MediaMetadataRetriever class has a new method, getScaledFrameAtTime , that finds a frame near a given time position and returns a bitmap with the same aspect ratio as the source frame, but scaled to fit into a rectangle of given width and height. This is useful for generating thumbnail images from video.

We recommend using this method rather than getFrameAtTime which can waste memory because it returns a bitmap with the same resolution as the source video. For example, a frame from a 4K video would be a 16MB bitmap, far larger than you would need for a thumbnail image. This class allows you to create, map, and manage anonymous shared memory that can be used by multiple processes or apps. This feature lets you create a WallpaperColors object from a bitmap, a drawable, or by using the first three most visually representative colors.

Apart from changing the background and foreground colors, the navigation bar in Android 8. This could be a preventive measure for the burn-in issues on devices with an OLED panel. Furthermore, the navigation bar icons are now noticeably smaller, and closer together compared to the navigation bar on previous Android versions.

Lovers of the dark side, your prayers have finally been answered. Not many people were a fan of Material design thanks to the white background used everywhere. It is not hard to imagine that those people were not very big fans of the Android Oreo UI changes. The Settings app turned completely white and so did the quick settings. We knew Google had been working on a dark theme but it never really took shape in two years. It finally makes an appearance again on the first Android 8.

But Google is not simply giving you a flip switch to turn on or off a dark or light theme. Depending on whether your wallpaper is dark or light, the System UI changes to a dark or light background respectively. Although, before you jump in joy, this happens only as long as the wallpaper is visible. On the Pixel 2 and Pixel 2 XL, if you long press the Power button, the Power menu does not open up at the dead center of the screen.