Can auto-correction of user's keyboard be disabled through my android application?

I am making an android application that checks user's spelling skills, so it is mandatory not to get any help from his keyboard's auto-correction feature.

Can I disable it (auto-correction / auto-completion) through my application or I should create my own custom keyboard?

Android Official Documentation - Input Type

Try this:

android:inputType="textNoSuggestions" 

Ref: Android Dev Site