class文件生成dex
dx的位置/Users/chennan/Library/Android/sdk/build-tools/27.0.3/dx
dx --dex --no-strict --output=/Users/chennan/Desktop/1.dex .
dx的位置/Users/chennan/Library/Android/sdk/build-tools/27.0.3/dx
dx --dex --no-strict --output=/Users/chennan/Desktop/1.dex .