aosp-part-framework-core

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AOSP Part VI — Framework Core. Use when reasoning about system_server's boot sequence (the four boot phases, service registration, Watchdog), the Intent system (Intent matching, IntentFilter, IntentResolver, package visibility, intent verification), Activity & Window Management (ActivityTaskManagerService, WindowManagerService, activity lifecycle, task/stack model, splash screens), the window system (WindowState, SurfaceControl, input dispatching, focus, IME insets, transitions), the display system (DisplayManagerService, logical vs. physical displays, HDR, brightness, refresh-rate switching), or the View system (View hierarchy, measure/layout/draw, Canvas/RenderNode, hardware acceleration). Chapters 20–25.

aospbooks By aospbooks schedule Updated 6/7/2026
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name: aosp-part-framework-core description: | AOSP Part VI — Framework Core. Use when reasoning about system_server's boot sequence (the four boot phases, service registration, Watchdog), the Intent system (Intent matching, IntentFilter, IntentResolver, package visibility, intent verification), Activity & Window Management (ActivityTaskManagerService, WindowManagerService, activity lifecycle, task/stack model, splash screens), the window system (WindowState, SurfaceControl, input dispatching, focus, IME insets, transitions), the display system (DisplayManagerService, logical vs. physical displays, HDR, brightness, refresh-rate switching), or the View system (View hierarchy, measure/layout/draw, Canvas/RenderNode, hardware acceleration). Chapters 20–25. metadata: author: 'utzcoz' last-updated: '2026-06-07'

AOSP Part VI — Framework Core

The Java/Kotlin layer running inside system_server that manages activities, windows, displays, and the View tree apps render into.

Chapters in this Part

  • 20-system-server.md — SystemServer.java, the four boot phases, service registration, Watchdog, lifecycle management, shutdown sequence
  • 21-intent-system.md — Intent matching, IntentFilter, IntentResolver, PackageManager queries, package visibility, intent verification
  • 22-activity-and-window.md — ActivityTaskManagerService, WindowManagerService, activity lifecycle state machine, task/stack model, splash screens
  • 23-window-system.md — WindowState, SurfaceControl, input dispatching, focus tracking, IME insets, transitions
  • 24-display-system.md — DisplayManagerService, logical vs. physical displays, color modes, HDR, brightness curves, refresh-rate switching
  • 25-view-system.md — View hierarchy, measure/layout/draw, Canvas/RenderNode, hardware acceleration, accessibility hooks

When to load which chapter

  • Question mentions system_server, boot phases, ServiceManager, Watchdog → 20-system-server.md
  • Question mentions Intent matching, IntentFilter, IntentResolver, package visibility → 21-intent-system.md
  • Question mentions ATM, WMS, activity lifecycle, splash screen, task/stack → 22-activity-and-window.md
  • Question mentions WindowState, SurfaceControl, input dispatch, focus, IME → 23-window-system.md
  • Question mentions DisplayManager, displays, HDR, refresh rate, brightness → 24-display-system.md
  • Question mentions View, ViewGroup, measure/layout/draw, Canvas, RenderNode → 25-view-system.md
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npx skills add https://github.com/aospbooks/aosp-internal-book --skill aosp-part-framework-core
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