Welcome to the Android 8.1 Developer Preview! The easiest way to get started with developing and testing is to enroll your supported device in the Android Beta Program. You'll then receive updates over-the-air to the latest preview releases. The developer preview supports a range of hardware devices, from phones to tablets and TV.
Ways to get the Preview on your device
If you have access to a supported device, you can update it to a the latest Developer Preview milestone build in one of these ways:
- Enroll the device in automatic OTA system updates through the Android Beta Program. Once enrolled, your device will receive regular over-the-air (OTA) updates of all milestone builds in the Android 8.1 Developer Preview. When the next version of Android is released, your device will automatically update to the final version. This approach is recommended because it lets you seamlessly transition from your current environment, through the various releases of the developer preview, to the release version.
- Download a Developer Preview system image and flash the device. OTA updates are not provided automatically for devices that you flash manually, but you can enroll those devices in Android Beta Program to get OTA updates. When the next version of Android is released, you can download the final device image from the factory images page.
Enrolling your device in automatic OTA updates
If you have access to a supported device (see the list in the Downloads table), you can receive over-the-air updates to preview versions of Android by enrolling that device in the Android Beta Program. These updates are automatically downloaded and will update your device just like official system updates. When the next version of Android is released, the device will automatically update to the production version.
You can un-enroll a device at any time. The device will receive an OTA update to the most recent production version of Android available for that device (for example, Android 7.1 Nougat). The update requires a full device reset, so user data on the device will be removed. Make sure to back up important data before un-enrolling a device.
For more information and to enroll your device, see the Android Beta Program web site.
Note: Un-enrolling requires a full device reset. Back up important data first.
Flashing your device manually
At any time you can download the latest Developer Preview system image and manually flash it to your device. See the table below to download the system image for your test device. Manually flashing a device is useful if you need precise control over the test environment or need to reinstall frequently, such as for automated testing.
Installing a system image on a device removes all data from the device, so you should back up your data first.
After you back up your device data and download the system image below that matches your device, follow the instructions at developers.google.com/android to flash the image onto your device.
Warning: To flash a device using one of the system images below, you must use the latest fastboot tool. You can get it from the Android SDK Platform-Tools package, which you can download here.
Manually flashed system images do not automatically receive OTA updates to later Developer Preview milestone builds or the final, production version. Make sure to keep your environment up-to-date and flash a new system image at each Developer Preview milestone.
If you decide you want to get OTA updates after manually flashing a device, all you need to do is enroll the device in the Android Beta Program. You can enroll the device at any time to receive the next Preview update over the air.
|Device||Download Link||SHA-256 Checksum|
|Pixel 2||Will be available later in the Developer Preview. See release notes for details.|
|Pixel 2 XL||taimen-opp5.170921.005-factory-879b105d.zip||
Uninstalling the Preview from a device
If you want to uninstall the preview from a device enrolled in Android Beta program, just visit the Android Beta site and unenroll. Your device will soon receive an update to the latest public release for your device.
For a device that you've flashed manually, obtain a factory spec system image from the Factory Images for Nexus and Pixel Devices page and then manually flash it to the device.
Warning: Uninstalling a Developer Preview system image prior to the end of the program requires a full device reset and removes all user data on the device.