When Android compiles, resource files with parameters will be divided and merged. Folders like drawable-hdpi-v4 are actually merged from drawable-hdpi and drawable-v4 (maybe there is no drawable-v4 in your code. That may be in the jar package you quoted).
![[Web front-end] Node.js quick start](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
When Android compiles, resource files with parameters will be divided and merged. Folders like
drawable-hdpi-v4are actually merged fromdrawable-hdpianddrawable-v4(maybe there is nodrawable-v4in your code. That may be in the jar package you quoted).