How Android Rendering Works ...
summary
Explains the full Android rendering pipeline from VSYNC (60Hz, 16.66ms) through display lists to the render thread and GPU, showing how property-only updates use displaylist properties to avoid redraws, and how reordering and batching collapses thousands of GL calls — one real case drops ~3,000 calls to a few hundred and saves about 1 ms — before issuing GL commands into a buffer queue and handing buffers to SurfaceFlinger and the hardware composer using overlays (typically 4, sometimes 7–8).
AI-written summary · about
chapters (26)
- 0:00Start
- 0:08How Android Renders
- 2:53Phases of Rendering
- 3:38Input
- 5:13Sync Phase
- 7:16Hierarchy Viewer
- 13:26Rendering Command
- 14:03Sink Phase
- 14:55The Opengl Renderer
- 15:17Font Management
- 17:12Reordering and Batching
- 21:28Rejecting Drawing Ups That Are outside of the Clip Rect
- 23:12Swap Buffer
- 23:49Surface Flinger
- 26:34Invalidate View Property
- 30:58Measure Specs
- 31:48Relative Layout
- 37:27Window Manager
- 38:06Create the Producer Endpoint of the Buffer Queue
- 38:30Surface View
- 39:51Surface Texture
- 44:55Hardware Composer
- 45:43Overlays
- 46:13Limitations
- 48:01Frame Buffer Layer
- 49:51Recyclerview
