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Android Anatomy and Physiology.pdf

发布时间：2022-06-21 发布人：admin 分类：说明书 资料大小：5.52M 资料格式：pdf 举报 版权申诉
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    Android Anatomy and Physiology
    Agenda • Android Anatomy • Linux Kernel • Native Libraries • Android Runtime • Application Framework • Android Physiology • Start-up Walkthrough • Layer Interaction
    Android Anatomy Applications Home Dialer SMS/MMS IM Browser Camera Alarm Calculator Contacts Voice Dial Email Calendar Media Player Albums Clock … Application Framework Activity Manager Package Manager Window Manager Telephony Manager Content Providers Resource Manager View System Location Manager Notification Manager … Libraries Surface Manager Media Framework OpenGL|ES FreeType SGL SSL SQLite WebKit Libc Android Runtime Core Libraries Dalvik Virtual Machine Linux Kernel Display Driver Camera Driver Bluetooth Driver USB Driver Keypad Driver WiFi Driver Shared Memory Driver Audio Drivers Binder (IPC) Driver Power Management
    Agenda • Android Anatomy • Linux Kernel • Native Libraries • Android Runtime • Application Framework • Android Physiology • Start-up Walkthrough • Layer Interaction
    Linux Kernel • Android is built on the Linux kernel, but Android is not Linux • No native windowing system • No glibc support • Does not include the full set of standard Linux utilities Linux Kernel Display Driver Camera Driver Bluetooth Driver USB Driver Keypad Driver WiFi Driver Shared Memory Driver Audio Drivers Binder (IPC) Driver Power Management
    Linux Kernel • Standard Linux 2.6.24 Kernel • Patch of “kernel enhancements” to support Android Linux Kernel Display Driver Camera Driver Bluetooth Driver USB Driver Keypad Driver WiFi Driver Shared Memory Driver Audio Drivers Binder (IPC) Driver Power Management
    Why Linux Kernel? • Great memory and process management • Permissions-based security model • Proven driver model • Support for shared libraries • Itʼs already open source! Linux Kernel Display Driver Camera Driver Bluetooth Driver USB Driver Keypad Driver WiFi Driver Shared Memory Driver Audio Drivers Binder (IPC) Driver Power Management
    Kernel Enhancements • Alarm • Ashmem • Binder • Power Management • Low Memory Killer • Kernel Debugger • Logger Linux Kernel Display Driver Camera Driver Bluetooth Driver USB Driver Keypad Driver WiFi Driver Shared Memory Driver Audio Drivers Binder (IPC) Driver Power Management
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