So when I try to implement animation using Unity, I found the whole process not only too long, you also need to do repeat steps over and over for a tiny modify. Anyway, if you feel the same, this is a post for you, the code will be at the bottom.

Target

1. Put all sprites/spritesheets in a folder
2. Press menu button
3. Turn spritesheet to <name>.anim at output folder

…