Android Splash screen error ( android studio)

Question

Good day!

I am new to android development and I found an interesting tutorial here:

http://www.c-sharpcorner.com/uploadfile/e14021/splash-screen-in-android-studio/

I downloaded her code to test it on my software. when I tried to view the code via emulator, I got this message:

Error

Cannot start compiler: the SDK is not specified for module
Splash-Splash, specify the SDK at Project Structure dialog."

May I know what are the possible solutions to prevent this error code from popping out again so that I can view it via emulator?

Any response from fellow members are appreciated.