The following example shows how you might find out when a pending update was first available to the device:. When an update becomes available, the Android system notifies device owners about the new update. In Android 8. The system might call this method more than once for a single update so check the update's status before responding. Call getPendingSystemUpdate to find out more about the system update in the callback. The following example shows how you can do this:.
When a system has more than one DPC, for example work profiles on fully managed devices, the device owner and profile owner both receive the callback. A device owner can control when updates are installed by setting a local system update policy for a device.
The system update policy can be one of three types:. The system limits each update to one day postponement. Besides postponement, Android might not be able to install an update for other reasons such as no connectivity, insufficient disk space, or low battery. The system resets the day postponement timer if a different update becomes available during the period—giving IT admins a chance to try the combined system updates.
Once 30 days have passed without a new update, the system prompts the user to install all the pending updates. Later, when a new system update becomes available, the day period begins again. You can set update policies in Android 8.
To specify when the device should install system updates, create an instance of SystemUpdatePolicy using one of the three types outlined above. The following code sample shows how you might do this. To see a windowed-policy example, look at the SystemUpdatePolicy documentation. To change when a device installs updates, you can create and set a new policy. To remove a policy from a device, call setSystemUpdatePolicy passing null as the policy argument.
After your DPC removes a policy, the device user sees notifications for any available system updates. Apps can call getSystemUpdatePolicy to get the current policy for the device.
To freeze the OS version over critical periods, such as holidays or other busy times, device owners can suspend system updates for up to 90 days. When a device is within a freeze period it behaves as follows:. The system enforces a mandatory day buffer period following any defined freeze periods to prevent freezing the device indefinitely. Remember, freezing system updates can prevent devices from receiving critical updates.
You set freeze periods on an update policy. You can't set freeze periods without setting a policy. When the device is outside any freeze periods you set, the normal policy behavior automatic, windowed, or postponed applies.
You can set freeze periods in Android 9 API level 28 or higher. A device owner sets a freeze period on a system update policy before setting the policy for the device. The steps are:. Because the freeze period repeats annually, the start and end dates of the period are represented by month and day values.
The start day must begin at least 60 days after the end of any previous freeze period. The following example shows how you might set two freeze periods for an existing system update policy:. Both the start day and the end day are inclusive. If the start day is greater than the end day such as winterSale in the previous example , the freeze period extends into the following year. When setting the system update policy for a device, Android repeats these tests and includes any current or past freeze periods for the device.
Android throws a SystemUpdatePolicy. ValidationFailedException when any of these tests fails. To get a list of freeze periods previously set on a system update policy object, all installed apps can call SystemUpdatePolicy. Android uses the ISO calendar also called the Gregorian calendar to calculate freeze periods and it ignores leap years.
This means that February 29th is not recognized as a valid date and is treated as if it were February 28th. Because Android checks for a day interval between past freeze periods, you might not be able to set a new freeze period without first clearing the record of past periods. You can confirm that a device is in a freeze period by checking that the user interface for system updates is disabled.
Content and code samples on this page are subject to the licenses described in the Content License. App Basics. Build your first app. App resources. Resource types. App manifest file. Device compatibility. Multiple APK support. Tablets, large screens, and foldables.
Build responsive UIs. Build for foldables. A privacy dashboard helps you prevent apps from collecting unwanted information, and turn off your camera and microphone across all apps. Here's how to use Android 12's new app privacy features. However, it's worth noting that these policies are less strict than those in Apple's recent iOS 14 software releases, which includes app " nutrition labels " that tell people what personal data their apps are collecting, and the new change in iOS Google is changing up the design of notifications to make them more modern and functional.
When you tap on a notification, it will take you directly to the app or action you want to take, instead of going through an intermediary service to start that action. This should make everything run faster. On Google Pixel phones , when you choose your wallpaper, a feature called color extraction will update the whole system, including your lock screen, widgets and notifications, with custom complementary colors. Another new feature lets you tap the back of your Android phone a set number of times to trigger the action of your choosing.
Once you enable it in settings under Gestures, you'll see a list of actions you can set, like taking a screenshot, playing and pausing media or launching Google Assistant. Method 2. How to Update Android Version with Upgrade Package Under ordinary conditions, the official website of mobile phone manufacturers will update some system files for users to download and upgrade.
Method 3. As for how to root the Android phone, just follow the detailed instructions: Download and install a root app on your computer. After running it, connect your phone to the computer via a USB cable. Root your phone by following the corresponding prompts.
Reboot your phone to access the latest version of the Android operating system. The app will be ready. Developers frequently update their apps to provide bug fixes or bring some improvements or new features. In order to see apps working flawlessly, you need to keep them updated.
If you are new to this OS and want to know how to update all Android apps at once, keep on reading. Android comes with many options when it comes to app updates. You can enable the option to update the apps automatically , or you can do it manually. However, when you are planning to update all Android apps at once, make sure that you are connected to a Wi-Fi network instead of mobile data.
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