通常我们可以可以得到一个工具条的bitmap，但是怎么将这个工具条的bitmap按照我们的需求切割成单个工具按钮的bitmap出来呢？这个代码就可以解决这个问题。-Usually we can be a tool of the bitmap. But how will this tool of the bitmap in accordance with our needs cut into individual tools button bitmap out? This code can solve this problem.