Android Framework
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| Android Framework | |
|---|---|
| Name | Android Framework |
| Developer | |
| Initial release | 2008 |
| Latest release version | varies by device |
| Programming language | Java, Kotlin, C++ |
| Operating system | Android |
| License | Apache License 2.0 |
Android Framework The Android Framework provides the core libraries, runtime, and APIs that enable application development and system behavior on devices running Android. It integrates components from projects and organizations such as Open Handset Alliance, Google, and contributors from the Linux kernel ecosystem to deliver services used by developers, manufacturers, and integrators. The framework sits between the underlying Linux kernel and user applications, exposing interfaces that interact with hardware, networking, multimedia, and user input.
Overview
The framework supplies a managed runtime environment derived from initiatives like Dalvik and Android Runtime and exposes APIs that tie into projects such as WebKit, SQLite, OpenGL ES, ExoPlayer, and ART. Major stakeholders include Google, device makers like Samsung, OnePlus, and platform partners such as Qualcomm and MediaTek. The ecosystem participates in events and standards discussions involving bodies like the Open Handset Alliance and conferences including Google I/O and Android Developer Summit.
Architecture
The architecture is layered: a kernel layer based on the Linux kernel interacts with drivers from vendors like Broadcom, Intel, and ARM. Above that, native libraries such as libc, Bionic, libjpeg, libpng, and Skia provide functionality used by the runtime. The runtime layer includes Android Runtime and earlier Dalvik virtual machine innovations influenced by open-source projects. Framework APIs are exposed through packages mirrored in the Android Open Source Project and implemented in languages pioneered by firms like Oracle Corporation (Java) and the Kotlin Foundation/JetBrains (Kotlin). Interaction patterns reference technologies from Bluetooth SIG for Bluetooth and 3GPP standards for cellular subsystems.
Application Framework APIs
APIs enable application developers to use components such as activities, services, content providers, and broadcast receivers, paralleling design patterns discussed at Google I/O and in literature from O'Reilly Media. Multimedia APIs tie into OpenGL ES and Vulkan for graphics, and codecs interoperable with MPEG and ISO/IEC standards. Networking stacks interoperate with IETF protocols and libraries inspired by projects like OkHttp and standards by W3C. Datastores rely on SQLite and integration with cloud services from Google Cloud Platform, Amazon Web Services, and Microsoft Azure in enterprise scenarios. UI toolkits reference design guidelines promoted by Google and research published at conferences such as CHI.
System Services and Components
System-level services include window and view management, power management, package management, telephony, and media playback orchestrated through managers and services documented in AOSP repositories. Telephony and radio interfaces work with standards bodies like 3GPP and vendors such as Qualcomm and MediaTek. Location services integrate with GPS infrastructures and partners including TomTom and HERE Technologies. Security components align with projects and standards from FIDO Alliance and Trusted Computing Group, while update mechanisms relate to initiatives such as Android Open Source Project and OEM programs from Google and manufacturers including Sony and LG.
Security and Permissions
Permission models evolved under influence from regulatory and standards organizations like W3C, IETF, and compliance regimes relevant to companies such as Google and device makers. The platform integrates cryptographic primitives influenced by standards from NIST and uses hardware-backed keystores leveraging Trusted Execution Environments (TEEs) from suppliers like ARM TrustZone and Intel SGX. Runtime permissions, sandboxing, and application signing are implemented with best practices informed by security research published at venues such as USENIX Security Symposium and Black Hat USA. Enterprise features integrate with management platforms from vendors like VMware and Microsoft Intune.
Version History and Evolution
The Framework has evolved through versions announced at events like Google I/O and tracked in the Android Open Source Project changelogs. Major milestones reference releases (codenamed by Google), platform-level shifts such as the move from Dalvik to ART, introduction of runtime permissions, modularization efforts such as Project Mainline and updates via Google Play services. Hardware and API adaptations respond to trends established by organizations like 3GPP for cellular, Bluetooth SIG for wireless, and graphics work driven by Khronos Group standards.
Development and Usage Patterns
Development workflows frequently use tools and services from Google, including Android Studio, build systems like Gradle, and continuous integration setups referencing providers such as GitHub and GitLab. Application distribution commonly flows through platforms operated by Google and alternative app stores maintained by companies such as Samsung and region-specific providers. Developers follow guidelines set by Google and community resources from organizations like XDA Developers and publications by ACM and IEEE for performance, accessibility, and interoperability. Large-scale deployments involve partnerships with original equipment manufacturers like Foxconn and carriers including Verizon Communications and T-Mobile US.