I am installing Android Studio and I have by default the path C:\\Users\\Administrator\\AppData\\Local\\Android\\sdk to set my SDK. If
To change default .gradle folder using Android Studio 2.2
Open folder of .AndroidStudiox.x (x.x is the version you use) -> config -> options -> gradle.settings.xml file
just right click to open it with wordpad, you should only see 1 option name = serviceDirectoryPath, change the value of that to desired path
remember use / not backward slash \ for folder even in Windows OS