j2me低级UI画的九宫格菜单，可以根据手机屏幕的大小自动调整显示的内容-UI junior j2me squares drawn menu, the phone can automatically adjust the size of the screen shows the contents of

用来检测画布色彩，调整颜色的深度，从而实现画布颜色的调整-Used to detect the canvas color, adjust the color depth, in order to achieve the adjustment of color on canvas