Gradle sync failed: Read timed out

:    Gradle sync started

:    Gradle sync failed: Read timed out
            Consult IDE log for more details (Help | Show Log) ( m  s  ms)

原因是Gradle下载超时

一.下载

https://gradle.org/releases/

二.安装

$ mkdir /opt/gradle
$ unzip -d /opt/gradle gradle-4.10.-bin.zip
$ ls /opt/gradle/gradle-4.10.
LICENSE  NOTICE  bin  getting-started.html  init.d  lib  media

三.配置系统变量

$ export PATH=$PATH:/opt/gradle/gradle-4.10./bin

四.验证

$ gradle -v

------------------------------------------------------------
Gradle 4.10.
------------------------------------------------------------

参考：

https://blog.csdn.net/tangjie134/article/details/79495204

https://gradle.org/install/