While an app is on the allowlist, it can launch services without limitation, and its background services are permitted to run. An app is placed on the allowlist when it handles a task that's visible to the user, such as:.
Note: IntentService is a service, and is therefore subject to the new restrictions on background services. As a result, many apps that rely on IntentService do not work properly when targeting Android 8. For this reason, Android Support Library In many cases, your app can replace background services with JobScheduler jobs. For example, CoolPhotoApp needs to check whether the user has received shared photos from friends, even if the app isn't running in the foreground.
Previously, the app used a background service which checked with the app's cloud storage. To migrate to Android 8. Prior to Android 8. With Android 8.
For this reason, Android 8. After the system has created the service, the app has five seconds to call the service's startForeground method to show the new service's user-visible notification. If the app does not call startForeground within the time limit, the system stops the service and declares the app to be ANR. If an app registers to receive broadcasts, the app's receiver consumes resources every time the broadcast is sent. This can cause problems if too many apps register to receive broadcasts based on system events; a system event that triggers a broadcast can cause all of those apps to consume resources in rapid succession, impairing the user experience.
To mitigate this problem, Android 7. In many cases, apps that previously registered for an implicit broadcast can get similar functionality by using a JobScheduler job. While keeping everything faster, more helpful and easier to use.
Helping new smartphone users do more. Let Google read a page out loud or get suggestions while typing. Set searches to private on shared devices. Even use the camera to hear new words on signs and forms. Bringing the world closer, just like that. Then pointing the camera at a sign that reads "No Parking" and translating it into a new language. One tap editing. So users spend less time searching for that one group photo—because built-in machine learning keeps things organized.
And it all happens offline, saving data for what matters most. Scrolling through a photo gallery of people, food, and animals. Clicking on a photo of a bowl of lemons so it fills the whole screen. Explore the world with a camera that keeps details crisp and colors vibrant. Use Portrait Mode to snap the perfect image. Talk to send a text or get answers to important questions.
Or who won the game? And the Google Assistant only runs when you ask it to, so your battery lasts a whole lot longer. Asking the Google Assistant if Nigeria won the football match against Argentina. The Google Assistant confirming yes, and the score was If device implementations add or modify the authentication methods to unlock the lock screen and if such an authentication method will be used to unlock the keyguard, but will not be treated as a secure lock screen, then they:.
Android provides Safe Boot Mode, which allows users to boot up into a mode where only preinstalled system apps are allowed to run and all third-party apps are disabled. This mode, known as "Safe Boot Mode", provides the user the capability to uninstall potentially harmful third-party apps. Android Automotive devices are expected to exchange data with critical vehicle subsystems by using the vehicle HAL to send and receive messages over vehicle networks such as CAN bus.
The data exchange can be secured by implementing security features below the Android framework layers to prevent malicious or unintentional interaction with these subsystems. Device implementations MUST pass all tests described in this section. However, note that no software test package is fully comprehensive. This will minimize the risk of introducing bugs that create incompatibilities requiring rework and potential device updates.
The CTS is designed to be run on an actual device. Like any software, the CTS may itself contain bugs. The CTS Verifier is included with the Compatibility Test Suite, and is intended to be run by a human operator to test functionality that cannot be tested by an automated system, such as correct functioning of a camera and sensors. The CTS Verifier has tests for many kinds of hardware, including some hardware that is optional.
Any method can be used, provided that it can replace the entirety of the software preinstalled on the device. For instance, any of the following approaches will satisfy this requirement:. That is, the update mechanism MUST preserve application private data and application shared data. Note that the upstream Android software includes an update mechanism that satisfies this requirement.
If the device implementations includes support for an unmetered data connection such as For device implementations that are launching with Android 6. If an error is found in a device implementation after it has been released but within its reasonable product lifetime that is determined in consultation with the Android Compatibility Team to affect the compatibility of third-party applications, then:. Android includes features that allow the Device Owner app if present to control the installation of system updates.
If the system update subsystem for devices report android. CDD Substantive changes to the compatibility requirements. You can join the android-compatibility forum and ask for clarifications or bring up any issues that you think the document does not cover.
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 Compatibility. Run CTS. CTS Verifier. Camera Testing. Camera ITS-in-a-Box. Sensor Fusion Box. Introduction This document enumerates the requirements that must be met in order for devices to be compatible with Android 8.
Requirements by Device Type Section 2 contains all of the requirements that apply to a specific device type. When the requirement is conditional, 1 is assinged for the 1st condition and the number increments by 1 within the same section and the same device type. Requirement ID This ID starts from 1 and increments by 1 within the same section and the same condition.
Device Types While the Android Open Source Project provides a software stack that can be used for a variety of device types and form factors, there are a few device types that have a relatively better established application distribution ecosystem. Handheld Requirements An Android Handheld device refers to an Android device implementation that is typically used by holding it in the hand, such as an mp3 player, phone, or tablet.
Android device implementations are classified as a Handheld if they meet all the following criteria: Have a power source that provides mobility, such as a battery. Have a physical diagonal screen size in the range of 2. The version of the currently-executing Android system, in human-readable format. This field MUST have one of the string values defined in 8.
The version of the currently-executing Android system, in a format accessible to third-party application code. For Android 8. A value chosen by the device implementer designating the specific build of the currently-executing Android system, in human-readable format.
A typical use of this field is to indicate which build number or source-control change identifier was used to generate the build. A value chosen by the device implementer identifying the specific internal hardware used by the device, in human-readable format. A possible use of this field is to indicate the specific revision of the board powering the device. A value reflecting the brand name associated with the device as known to the end users.
See section 3. Native API Compatibility. A value chosen by the device implementer containing the development name or code name identifying the configuration of the hardware features and industrial design of the device.
A string that uniquely identifies this build. A string that uniquely identifies the host the build was built on, in human-readable format. An identifier chosen by the device implementer to refer to a specific release, in human-readable format.
This field can be the same as android. A value chosen by the device implementer containing the name of the device as known to the end user. A value chosen by the device implementer containing the development name or code name of the specific product SKU that MUST be unique within the same brand. MUST be human-readable, but is not necessarily intended for view by end users. A comma-separated list of tags chosen by the device implementer that further distinguishes the build.
This field MUST have one of the values corresponding to the three typical Android platform signing configurations: release-keys, dev-keys, test-keys. A value chosen by the device implementer specifying the runtime configuration of the build.
This field MUST have one of the values corresponding to the three typical Android runtime configurations: user, userdebug, or eng. A name or user ID of the user or automated user that generated the build. A value indicating the security patch level of a build. It MUST report the correct value and if such a build does not exist, report an empty string "". A value chosen by the device implementer identifying the specific internal bootloader version used in the device, in human-readable format.
Sample rates up to 48 kHz but up to MIDI Type 0 and 1. DLS Version 1 and 2. Type 0 and 1. Limitations with attachments. Calendar entries past the year do not sync. Calendar entries past the year , on both the device and server, are not synchronized. This applies to both repeating or individual events.
Room reservations are not updated when changes are made to calendar events from the device. Room reservations are not supported but are synced to the device as part of the location for display purposes only. Rescheduling or cancelling a meeting from the device will not reschedule or cancel the related room reservation.
Not all calendar events are exported to the Android OS. Only events from the past week and the upcoming month can be exported to the Android OS, regardless of the current calendar sync settings. Limitations with contact names in calendar events.
Limitations with searching calendar events. You cannot search calendar entries. Privacy information is not displayed. Event descriptions cannot display rich text. Not all instances of a repeating meeting display. Building intelligent escalation chains for modern SRE. Podcast Who is building clouds for the independent developer? Featured on Meta. Now live: A fully responsive profile. Reducing the weight of our footer. Linked 2. Related Hot Network Questions.
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