内容：

1. 绘制正叶线的程序，参数包括叶片长度、数目颜色和中心位置。

2. 绘制阴阳八卦的程序，可以由参数指定其内外半径、外线段的颜色和中心位置。

3. 讲稿中的各种实例。

程序将所有内容在一个项目中实现了，所以用了滚动条并将窗口设置的较大，以容下

所用图像，有些图像没有显示，但在OnDraw函数中已经包含了其代码，只需将注释符‘/* */’

去掉即可在视图中显示其对应内容。-: 1. Rendering is the process leaves lines, including blade length parameter, the number of colors and center. 2. Yin and Yang nosy mapping procedures, parameters can be specified by its internal and external radius, color outside the lines and the center position. 3. The scr ipt various examples. Procedures to all elements in a project achieved, and so will be a rolling set of the larger window, used to accommodate images, some images have not been revealed, but in OnDraw function includes its code, It only needs to meet the Notes' / * * / 'can be removed from the View showed its counterpart.