Gradle 'MyApp' refresh failed

1、Error:Cannot locate factory for objects of type DefaultGradleConnector, as ConnectorServiceRegistry has been closed.
Restart Android studio will fix it.

2、重启后：Error:No toolchains found in the NDK toolchains folder for ABI with prefix: mips64el-linux-android

• 解决：在toolchains文件夹中缺少 mips64el-linux-android 文件夹
• 下载地址： https://developer.android.google.cn/ndk/downloads/?hl=zh-cn，
• Mac本：打开 cd /Users/baidu/Library/Android/sdk/toolchains
• 将下载的zip文件解压，并且打开文件夹中的toolchains文件夹，找到需要的mips64el-linux-android ，并将其拖到 Users/baidu/Library/Android/sdk/toolchains
• sync now即可