Canvas is used, but obviously it is not only possible with some APIs of Canvas. Capturing screen touch events, asymptotic line coloring, and more importantly, various algorithms and matrix data processing cannot be summarized and described clearly in one or two sentences. You can start by searching Google for "Android calligraphy".
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
Canvas is used, but obviously it is not only possible with some APIs of Canvas. Capturing screen touch events, asymptotic line coloring, and more importantly, various algorithms and matrix data processing cannot be summarized and described clearly in one or two sentences. You can start by searching Google for "Android calligraphy".