Three weeks ago at Google I/O, we
the second developer preview of Android O along with key themes, Fluid
Experiences and Vitals, and highlighted our work
towards a modular base with
Treble. It was also an important milestone for us with the release
of the first beta-quality candidate. We talked a lot about what's new in Android
during the keynote and breakout sessions—if you missed the livestream, be sure
to check out the full archive of talks
Today we're rolling out Developer Preview 3 with the final Android O APIs, the
latest system images, and an update to Android Studio to help you get ready for
the consumer release later in the summer. Watch for one more preview update
coming in July that will bring you the near-final system images.
If you've already enrolled your device in the
update to Developer Preview 3 shortly.
Make your app compatible with Android O
With the consumer launch approaching
months, a critical first step is making your current app compatible with
Android O. This will give your users a seamless transition to the new platform
as it arrives on their devices.
If you haven't tested your app for compatibility yet, getting started is
straightforward -- just enroll a supported device in Android Beta and get the
latest update over-the-air, then install your current app from Google Play and
test. The app should run and look great, and it should handle the Android O
changes properly -- in particular pay attention to
limits and changes in
and
After you've made any necessary updates, we recommend publishing the compatible
version of your app to Google Play right away -- without changing the app's
platform targeting.
Enhance your app with Android O features and APIs
Extending your apps with Android O features can help you drive more engagement,
offer new interactions, give users more control and security, and even improve
your app's performance.
channels and
give you more ways to surface new content to users and bring them back into your
app. Picture-in-picture keeps your app onscreen while users are multitasking,
and
makes it simple for them to enter forms data and helps keep their data secure.
Also check out
icons,
resources,
fonts and
TextView,
API, and
You'll also want plan your support for
execution limits and other important
in vital system behavior for O apps.
Visit the O Developer
Preview site to learn about all of the new features and APIs and how to
build them into your apps.
Picture-in-Picture mode lets you keep users engaged while they are multitasking (left). Notification dots keep users active in your app and let them jump directly the app’s core functions (right).
Get started with Developer Preview 3
Today's preview update includes the latest version of the Android O platform
with the final API level 26 and hundreds of bugfixes and optimizations. You can
download the final API 26 SDK from the SDK Manager in
Studio, and
Support Library 26.0.0 beta 2 from
Maven repository.
Together, these give you everything you need to develop and test your apps with
the official Android O APIs. Once you've installed the final SDK, you can update
your project's compileSdkVersion to API 26 to compile against the
official Android O APIs. We also recommend updating your app'stargetSdkVersion to API 26 to opt-in and test your app with Android
O specific
changes. See the
guide for details on how to set up your environment to build with Android O.
APIs have changed since the second developer preview, so if you have existing
code using Android O preview APIs, take a look at the
report to see where your code might be affected.
If you're developing for Android O, we recommend updating to the latest version
of
Studio 3.0, now available in the canary channel. Aside from great new
features like improved app performance profiling tools, support for the
programming language, and Gradle build optimizations, Android Studio 3.0
includes build support for
Apps, an
Icon Wizard, and support for
Fonts,
Fonts.
Android Studio 3.0 includes tools for developing with Android O features lets you preview XML font resources in your app.
If you don't plan to use those features, you now have the option of developing
for Android O using
from the stable channel. Note that the tools for working with adaptive icons and
downloadable fonts, and XML fonts are not available in Android Studio 2.3.3.
Publish your apps to alpha, beta or production channels in Google
Play
Now that the APIs are final, you can publish APK updates compiling with, and
optionally targeting, API 26 to your alpha, beta, or even production channels in
Google Play. Publishing your O-targeted app during the preview lets you test
compatibility on existing devices and push updates to devices running API 26 --
such as users who are enrolled in the Android Beta program.
To make sure that your updated app runs well on Android O as well as older
versions, a common strategy is to use
Play's beta testing feature to get early feedback from a small group of
users -- including developer preview users — and then do a staged rollout as you
release the updated app to all users.
How to get the preview update
Through the Android Beta program,
developers and early adopters worldwide will soon be getting Developer Preview 3
on their devices. If you aren't yet enrolled, just visit
Android phone or tablet. As always, you can also download and
this update manually. The O Developer Preview is available for Pixel, Pixel
XL, Pixel C, Nexus 5X, Nexus 6P, and Nexus Player.
Thanks so much for all of your feedback so far. Please continue to share
requests as we work towards the consumer release later this summer. We're
looking forward to seeing your apps on Android O!
