Posted by Dave Burke, VP of Engineering
Today we're rolling out an update to the Android 7.1 Developer Preview -- the
last before we release the final Android 7.1.1 platform to the ecosystem.
Android 7.1.1 includes the developer features already available on Pixel and
Pixel XL devices and adds optimizations and bug fixes on top of the base Android
7.1 platform. With Developer Preview 2, you can make sure your apps are ready
for Android 7.1.1 and the consumers that will soon be running it on their
devices.
As
in October, we're also expanding the range of devices that can receive this
Developer Preview update to Nexus 5X, Nexus 6P, Nexus 9, and Pixel C.
If you have a supported device that's enrolled in the
update to Developer Preview 2 over the coming week. If you haven't enrolled your
device yet, just visit the site to
enroll your device and get the update.
In early December, we'll roll out Android 7.1.1 to the full lineup of supported
devices as well as Pixel and Pixel XL devices.
What's in this update?
Developer Preview 2 is a release candidate for Android 7.1.1 that you can use to
complete your app development and testing in preparation for the upcoming final
release. In includes near-final system behaviors and UI, along with the latest
bug fixes and optimizations across the system and Google apps.
It also includes the developer features and APIs (API level 25) already
introduced in Developer Preview 1. If you haven't explored the developer
features, you'll want to take a look at
icon resources, and
support, among others -- you can see the
developer features here.
With Developer Preview 2, we're also updating the SDK build and platform tools
in Android Studio, the Android 7.1.1 platform, and the API Level 25 emulator
system images. The latest version of the support library (
is also available for you to
image keyboard support,
navigation, and other features for devices running API Level 25 or earlier.
For details on API Level 25 check out the
diffs and the updated
reference on the
site.
Get your apps ready for Android 7.1
Now is the time to optimize your apps to look their best on Android 7.1.1. To
get started, update to
Studio 2.2.2 and then download the API Level 25 platform, emulator system
images, and tools through the SDK Manager in Android Studio.
After installing the API Level 25 SDK, you can update your project's
compileSdkVersion to 25 to build and test against the new APIs. If you're doing
compatibility testing, we recommend updating your app's targetSdkVersion to 25
to test your app with compatibility behaviors disabled. For details on how to
set up your app with the API Level 25 SDK, see
up the Preview.
If you're adding app shortcuts or circular launcher icons to your app, you can
use Android Studio's built-in Image Asset Studio to quickly help you create
icons of different sizes that meet the
design guidelines. You can test your round icons on the Google APIs emulator
for API Level 25, which includes support for round icons and the new Google
Pixel Launcher.
 |  |
your round icon assets.
If you're adding image keyboard support, you can use the Messenger and Google
Keyboard apps included in the preview system images for testing as they include
support for this new API.
Scale your tests using Firebase Test Lab for Android
To help scale your testing, make sure to take advantage of
Test Lab for Android and run your tests in the cloud at no charge during the
preview period on all virtual devices including the Developer Preview 2 (API
25). You can use the automated crawler (
test your app without having to write any test scripts, or you can upload your
own instrumentation (e.g. Espresso) tests. You can upload your tests
Publish your apps to alpha, beta or production channels in Google
Play
After you've finished final testing, you can publish your updates compiled
against, and optionally targeting, API 25 to Google Play. You can publish to
your alpha,
or even production channels in the Google Play Developer Console. In this way,
push your app updates to users whose devices are running Android 7.1, such as
Pixel and Android Beta devices.
Get Developer Preview 2 on Your Eligible Device
If you have an eligible device that's already enrolled in the
the Developer Preview 2 update over the coming week. No action is needed on your
part. If you aren't yet enrolled in program, the easiest way to get started is
by visiting android.com/beta and opt-in
your eligible Android phone or tablet -- you'll soon receive this preview update
over-the-air. As always, you can also download and
this update manually.
As mentioned above, this Developer Preview update is available for Nexus 5X,
Nexus 6P, Nexus 9, and Pixel C devices.
We're expecting to launch the final release of the Android 7.1.1 in just a few
weeks Starting in December, we'll roll out Android 7.1.1 to the full lineup of
supported preview devices, as well as the recently launched Pixel and Pixel XL
devices. At that time, we'll also push the sources to AOSP, so our device
manufacturer partners can bring this new platform update to consumers on their
devices.
Meanwhile, we continue to welcome your feedback in the
Preview issue tracker,
Preview Developer community, or
community as we work towards the final consumer release in December!
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