解决 Android Studio Error:Cause: unable to find valid certification path to requested target

命令行进入 Android Studio 安装目录里的 jre 证书目录，如

/home/yangming/Develop/Android/android-studio/jre/jre/lib/security

执行命令，添加 https 证书信任

keytool -import -alias cacert -keystore cacerts -file 证书文件.cer

口令 changeit
是否信任此证书? 依据系统语言，“yes"或"是”
重启 Android Studio
如果依然不行，在系统上所有的 jre/lib/security （JDK 环境）中重复执行以上步骤

https://intellij-support.jetbrains.com/hc/en-us/community/posts/115000094584-IDEA-Ultimate-2016-3-4-throwing-unable-to-find-valid-certification-path-to-requested-target-when-trying-to-refresh-gradle