由浅到深，深入分析APP卡顿和优化，android开发基础教程
boolean clearHide, boolean isForward, boolean reallyResume, int seq, String reason) {…ViewManager wm = a.getWindowManager();//获得WindowManager，实际是WindowManagerImpl…wm.addView(decor, l);//添加视图…wm.updateViewLayout(decor, l);//需要刷新的时候会走这里…}从上面可以看到，
