How to delete the records in android?

Hey guys I tried alot to make it happen but it isnt. I had delete record by put a name in whereagrs[]={"john"}; but I cant delete it by edittext can u guys help me plz? ma is main activity from where i am getting name from the edittext.

public void delete(){
    String name=(String)ma.name.getText().toString();
    SQLiteDatabase datab=db.getWritableDatabase();
    String whereArgs[]={name};
    datab.delete(Database.TABLE_NAME, Database.NAME+"=?",whereArgs);
}