Android: How to get all values from one specific column with cursor?

At the time when oncreate() run, I have to fill 3 textviews with the values of a column called "numbers". I have a table contact with 2 columns _id and numbers. I want there can be only three entries in table "contact". When i put another entries , the previous values should be replaced. And show all the saved three values on three different textviews as oncreate() called.

Please help me as i m new to android and have not much such conditional knowledge.