Could not resolve all files for configuration ‘:classpath‘.

First of all, allow me to complain, this bug took me 3 hours, and the problems on the Internet have been searched over and over again

首先我的环境：使用了公司的代理，不是直接访问的(用的云桌面)，如果你不是走的代理,那么可以离开了，就不浪费你宝贵的事件了

solution

1. Open gradle.propertiesthe file , if the file does not exist, please create the file.
2. Add the following configuration to the gradle.properties file: (assuming your company's proxy is 192.168.xxx.xxx:1234)

systemProp.http.proxyHost=192.168.xxx.xxx
systemProp.http.proxyPort=1234
systemProp.https.proxyHost=192.168.xxx.xxx
systemProp.https.proxyPort=1234

3. Replace it with your own company's proxy ip and port. If it is useful, please like it so that more people can see it