draw

七、draw流程分析

  1

 1 //==================ViewRootImpl.java=================
 2 private void performDraw() {
 3       ......
 4       boolean canUseAsync = draw(fullRedrawNeeded);
 5       ......
 6 }
 7 
 8 private boolean draw(boolean fullRedrawNeeded) {
 9       ......
10       if (!drawSoftware(surface, mAttachInfo, xOffset, yOffset,
11                         scalingRequired, dirty, surfaceInsets)) {
12                     return false;
13                 }
14       ......
15 }
16 
17 private boolean drawSoftware(......){
18       ......
19       mView.draw(canvas);
20       ......
21 }