android 渲染架构演进

view.onDraw–>canvas.draw–>rasterizer–> view.onDraw–>canvas.draw- openGL–>GPU–>rasterizer-> 1. Canvas.draw 绘制 录制 2. view 3. GPU JANK Drawing without VSync JellyBean 4.1 Drawing with VSYnc why Vsync Vsync Android UI Framework Choreographer Vsync Vsync ，候时的制绘们我知通统系，件事收接的知通统系是 大太是不知感 对 。顿卡有会以所，调步个这响影会能可程线主是但，定稳隔间前目台平