You can install an incremental update package only on devices that have the source build used in constructing the package. For example, the following commands use release tools to build an incremental update for the tardis device.
Distribute an incremental package only to devices that run exactly the same previous build used as the incremental package's starting point. Attempting to install the incremental package on a device with some other build results in an installation error.
When the install fails, the device remains in the same working state running the old system ; the package verifies the previous state of all the files it updates before touching them, so the device isn't stranded in a half upgraded state. For the best user experience, offer a full update for every 3—4 incremental updates. This helps users catch up to the latest release and avoid a long install sequence of incremental updates.
Doing so requires configuring the target devices to use dynamic fingerprints and updating the OTA metadata using OTA tools to include the device name and fingerprint in the pre and post condition entries. For example, the following SKU has multiple variations:. Many OEMs use a single image for multiple SKUs, then derive the final product name and device fingerprint at runtime after the device boots up.
This process simplifies the platform development process, enabling devices with minor customizations but different product names to share common images such as tardis and tardispro. A fingerprint is a defined concatenation of build parameters such as ro.
The fingerprint of a device is derived from the system partition fingerprint and is used as an unique identifier of the images and bytes running on the device.
To create a dynamic fingerprint, use dynamic logic in the device's build. For example, to use dynamic fingerprints for tardis and tardispro devices, update the following files as shown below.
These lines dynamically set the device name, fingerprint, and ro. For example, the following code is the metadata file for an OTA package targeting the tardis device. The pre-device , pre-build-incremental , and pre-build values define the state a device must have before the OTA package can install. The post-build-incremental and post-build values define the state a device is expected to have after the OTA package installs.
The values of pre- and post- fields are derived from the following corresponding build properties. The data is then used to update the OTA metadata to include the device name and fingerprint in the pre- and post- conditions using the pipe character as the delimiter. For example, when the property is ro. To support this functionality on devices running Android 10, see the reference implementation. This changelist conditionally parses the import statements in the build.
Content and code samples on this page are subject to the licenses described in the Content License. Docs Getting Started About. Core Topics Architecture. Overview Architecture. Modular System Components. Modular Kernels. HIDL General. HIDL Java. ConfigStore HAL. Device Tree Overlays. Vendor NDK. Vendor Interface Object. Core Concepts. Camera Features. Bluetooth and NFC. Calling and Messaging. ACTS Tests. Surface and SurfaceHolder. SurfaceFlinger and WindowManager. Hardware Composer HAL.
OpenGL ES. There are a number of file explorers that support root access, but I personally use ES File Explorer. I was already in a adb shell su session as the file was being downloaded, after I exited and re-entered the shell and tried to run the dumpsys command I couldn't find it. I'm guessing dumpsys works on a temporary log. Alternatively, you can flash an FXZ rom image for your current version or later.
The benefit of that is that it doesn't matter what state your phone is in or if its missing bloatware that the OTA update requires. Sign up to join this community. The best answers are voted up and rise to the top. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams? Learn more. Where can I find the OTA update file? Ask Question. Asked 9 years ago. Active 2 months ago. Viewed k times. Improve this question. You probably need root for this, though.
The new one I would expect to be something like 6. The file is about MB. Any other ideas? Hm, not sure. I would have expected the newest OTA to be there as well, and I don't know of any other places offhand that it may have ended up.
I had a similar issue when updating from to I followed the two pages of instructions in the below-linked article to get me to androidadvices. So if you want to post it as an answer I will accept it.
Not sure why the decided to mislabel the file, but I just got it working and that was the file that got me to ICS, thx!
0コメント