Third-party applications rely on the platform to broadcast certain intents to notify them of changes in the hardware or software environment. Android includes settings that provide users an easy way to select their default applications, for example for Home screen or SMS.
Where it makes sense, device implementations MUST provide a similar settings menu and be compatible with the intent filter pattern and API methods described in the SDK documentation as below. If device implementations report android. If device implementations support the VoiceInteractionService and have more than one application using this API installed at a time, they:. If device implementations allow launching normal Android Activities on secondary displays, they:. If device implementations allow launching normal Android Activities on secondary displays and primary and secondary displays have different android.
DisplayMetrics :. If device implementations allow launching normal Android Activities on secondary displays and a secondary display has the android. Managed Dalvik bytecode can call into native code provided in the application. If device implementations provide a complete implementation of the android. Webview API, they:. If device implementations include a standalone Browser application for general web browsing, they:.
The behaviors of each of the API types managed, soft, native, and web must be consistent with the preferred implementation of the upstream Android Open Source Project. Some specific areas of compatibility are:.
The above list is not comprehensive. The Compatibility Test Suite CTS tests significant portions of the platform for behavioral compatibility, but not all. It is the responsibility of the implementer to ensure behavioral compatibility with the Android Open Source Project. Android follows the package and class namespace conventions defined by the Java programming language. To ensure compatibility with third-party applications, device implementers MUST NOT make any prohibited modifications see below to these package namespaces:.
Note that the restrictions above correspond to standard conventions for naming APIs in the Java programming language; this section simply aims to reinforce those conventions and make them binding through inclusion in this Compatibility Definition.
See section 7. SHOULD run fuzz tests under various modes of execution and target architectures to assure the stability of the runtime. Note that memory values specified below are considered minimum values and device implementations MAY allocate more memory per application. Android includes a launcher application home screen and support for third-party applications to replace the device launcher home screen.
If device implementations allow third-party applications to replace the device home screen, they:. If device implementations include a default launcher that supports in-app pinning of shortcuts, they:.
If device implementations implement a default launcher that provides quick access to the additional shortcuts provided by third-party apps through the ShortcutManager API, they:. If device implementations include a default launcher app that shows badges for the app icons, they:. If device implementations support third-party app widgets and in-app pinning of shortcuts, they:.
Android includes Notification and NotificationManager APIs that allow third-party app developers to notify users of notable events and attract users' attention using the hardware components e. If device implementations allow third party apps to notify users of notable events , they:. Android includes the NotificationListenerService APIs that allow apps once explicitly enabled by the user to receive a copy of all notifications as they are posted or updated.
If device implementations report the feature flag android. Generally speaking, this functionality consists of a single, system-wide user interface that allows users to enter queries, displays suggestions as users type, and displays results.
The Android APIs allow developers to reuse this interface to provide search within their own apps and allow developers to supply results to the common global search user interface. Android also includes the Assist APIs to allow applications to elect how much information of the current context is shared with the assistant on the device. The AOSP implementation meets this requirement by having controls in the notification shade.
Android supports a variant theme with translucent system bars, which allows application developers to fill the area behind the status and navigation bar with their app content.
To enable a consistent developer experience in this configuration, it is important the status bar icon style is maintained across different device implementations. Live wallpapers are animations, patterns, or similar images with limited input capabilities that display as a wallpaper, behind other applications. Hardware is considered capable of reliably running live wallpapers if it can run all live wallpapers, with no limitations on functionality, at a reasonable frame rate with no adverse effects on other applications.
As an example, some live wallpapers may use an OpenGL 2. Live wallpaper will not run reliably on hardware that does not support multiple OpenGL contexts because the live wallpaper use of an OpenGL context may conflict with other applications that also use an OpenGL context. Device implementations including the recents function navigation key as detailed in section 7. If device implementations including the recents function navigation key as detailed in section 7. Android includes support for Input Management and support for third-party input method editors.
If device implementations allow users to use third-party input methods on the device, they:. If device implementations declare the android.
Android includes support for interactivescreensavers , previously referred to as Dreams. Screen savers allow users to interact with applications when a device connected to a power source is idle or docked in a desk dock.
Android Watch devices MAY implement screen savers, but other types of device implementations SHOULD include support for screen savers and provide a settings option for users toconfigure screen savers in response to the android. If device implementations include a hardware sensor e. GPS that is capable of providing the location coordinates:. Android includes support for the emoji characters defined in Unicode If device implementations have the capability to display multiple activities at the same time, they:.
If device implementations support multi-window mode s and Picture-in-Picture multi-window mode, they:. Android includes features that allow security-aware applications to perform device administration functions at the system level, such as enforcing password policies or performing remote wipe, through the Android Device Administration API ]. If device implementations implement the full range of device administration policies defined in the Android SDK documentation, they:.
Android provides an accessibility layer that helps users with disabilities to navigate their devices more easily.
The TV app that is required for Android device implementations declaring the android. Android Television device implementations SHOULD support TV input app linking , which allows all inputs to provide activity links from the current activity to another activity i. Android provides a Quick Settings UI component that allows quick access to frequently used or urgently needed actions.
If device implementations include the UI framework that supports third-party apps that depend on MediaBrowser and MediaSession , they:. Android includes support for companion device pairing to more effectively manage association with companion devices and provides the CompanionDeviceManager API for apps to access this feature.
Device implementations MUST NOT install application packages from unknown sources, unless the app that requests the installation meets all the following requirements:.
Device implementations MUST have an activity that handles the android. All of the codecs listed in the section below are provided as software implementations in the preferred Android implementation from the Android Open Source Project. Please note that neither Google nor the Open Handset Alliance make any representation that these codecs are free from third-party patents.
Those intending to use this source code in hardware or software products are advised that implementations of this code, including in open source software or shareware, may require patent licenses from the relevant patent holders.
See more details in 5. Audio Codecs Details. If device implementations declare support for the android. If device implementations support the decoding of AAC input buffers of multichannel streams i. Image Codecs Details. If device implementations advertise HDR profile support through Display. HdrCapabilities , they:. CodecCapabilities class, they:. If device implementations support any video encoder and make it available to third-party apps, they:.
If device implementations include an embedded screen display with the diagonal length of at least 2. If device implementations support any of the H. If device implementations support H. If device implementations report support of H. If device implementations report support of VP8 encoding for p or p resolution videos through the media APIs, they:. If the height that is reported by the Display. If the height as reported by the Display. If device impelementations declare android.
The android. If device implementations declare both android. AudioRecord API to record from this audio source, it captures a mix of all audio streams except for the following:. Android 8. And the new version has added many new features such as picture-in-picture mode for multitasking, new notification dots on apps icons.
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