踩坑實錄 Android studio中關於 No cached version of **** available for of處理辦法

當我們添加某些依賴庫（Okhttp、Retrofit）時， Android studio 會報如下錯誤：

Error:A problem occurred configuring project ':app'.
> Could not resolve all dependencies for configuration ':app:_iranDebugCompile'.
   > Could not resolve com.facebook.network.connectionclass:connectionclass:1.0.1.
     Required by:
         doctor:app:unspecified
      > No cached version of com.facebook.network.connectionclass:connectionclass:1.0.1 available for offline mode.

需要注意的在最后一行，  > No cached version of com.facebook.network.connectionclass:connectionclass:1.0.1 available for offline mode.

我們需要做的是，取消紅色邊框標記的選項，然后 build Gradle 。