Error while building the Android Project:
SDK location not found. Define location with an ANDROID_SDK_ROOT environment variable or by setting the sdk.dir path in your project's local properties file at .../local.properties.
Solution is to create a file named local.properties at the root of your Android project. If you are or on MAC or Ubuntu you can use the following command to create that:
Enter the following text in that file:
sdk.dir = /Users/<yourusername>/Library/Android/sdk
sdk.dir = /Users/johnsmith/Library/Android/sdk
The above example was for MAC, for Ubuntu it would be:
sdk.dir = /home/<UserName>/Android/Sdk
and for Windows it would be:
Save the file and rebuild the Android project and it should work now.