If you have selected project, SMS Blocker than u dun need to be worried, cause solution of this project is available on internet, you are just required to explore and get proper material.
I can just inform you that you need following environment in order to get it successfully done.
>Eclipse with SDK or Android Studio
>SQLite Open Helper for Database
>JDK (java development kit) for java help.
than start it as a best choice and you will get success. this is not so tough.
Further keep in mind one thing, internet and discussion is the best solution for you in order to develop something perfect.
You may add discussion here to get positive response.
you can ask for queries
is you can send me the basic coding idea
Download Android Studio and practice basic applications.
Hashir bhai and all others please do mention what type of info you are required?
Basic coding belongs to only getting a deep breath into new environment.
You may get basics from different sites or i can help you, you may mention here your issue.