错误
Could not find com.serenegiant:common:4.1.1. Required by: project :app > project :libusbcamera Search in build.gradle files
解决办法
下载common.aar，可以从这时下载：
https://download.csdn.net/download/xw245184020/12414825
新建aars目录，把aar放进去。
修改build.gradle
dependencies { ...... // add this compile fileTree(include: '*.aar', dir: 'aars') }
