Apps how to retrieve certain data from the database for different person?

[currycrab]

how do i do it that for exmaple. we have a main.xml that have 1 text field for entering a name for example A and when we press a button lets say button 1. it will retreive A's data from database and display on main.xml's textview.

thanks for helps.

 

[currycrab]

got much help from here :
Tutorial: Building an Android Application in 6 Steps