public void setDrawViews(boolean drawViews) {
    if (this.drawViews != drawViews) {
      this.drawViews = drawViews;
      invalidate();
    }
  }
Set whether the view layers draw their contents. When false, only wireframes are shown.
saklib/src/main/java/com/wanjian/sak/layer/impl/ScalpelFrameLayout.java