Android studio 出现一直在同步Syncing only active variant

Android studio 一直在同步，停止下来。

后面再Event Log 里面看到下面的提示

17:01    Gradle sync failed: EventQueue.isDispatchThread()=false Toolkit.getEventQueue()=com.intellij.ide.IdeEventQueue@1c1ff466 Current thread: Thread[ApplicationImpl pooled thread 225,4,Idea Thread Group] 2032381957SystemEventQueueThread: Thread[AWT-EventQueue-0,6,Idea Thread Group] 391656334 (3 s 710 ms)

17:01  Syncing only active variant 

           You can disable this experimental feature from  

           File → Settings → Experimental → Gradle → Only sync the active variant

        解决办法找到
        File → Settings → Experimental → Gradle → Only sync the active variant 按着这个设置把Only sync the active variant 打钩去掉即可

总结：Android studio出现问题也可以在Event Log 查找原因。有些只是一些设置的问题。