Could not find adb. Please set the ANDROID_HOME environment variable with the Android SDK root directory path

I am Not Able to Run my selenium testcase in Appium ,It is showing nelow Error.
please help me to solve this error

     error: Failed to start an Appium session, err was: Error: Could not find adb. Please set the ANDROID_HOME environment variable with the Android SDK root directory path.

Thanks And Regards,
Suresh K

Hey there
I’d double check your android sdk installation by going to the android documentation directly. Here’s a quick stack overflow for the Mac OS X http://stackoverflow.com/questions/19986214/setting-android-home-enviromental-variable-on-mac-os-x

Of course, the more info you can give us (.bashrc or equivalent, appium logs, the better )
Thanks

HI shermaneric ,
Thanks I was checked ,Now its working Fine