Android Studio uygulama geliştirme

 public String vericek(){
        Cursor cs = database.rawQuery("SELECT id FROM yazarlar ORDER BY RANDOM() LIMIT 1 ", null);
        String a = cs.getString(0);
        cs.close();

        return a;
    }

            Cursor cursor = database.rawQuery("SELECT * FROM musicians",null);

            int nameIx = cursor.getColumnIndex("name");
            int ageIx = cursor.getColumnIndex("age");
            int idIx = cursor.getColumnIndex("id");

            while (cursor.moveToNext()) {
                System.out.println("Name: " + cursor.getString(nameIx));
                System.out.println("Age: " + cursor.getInt(ageIx));
                System.out.println("Id: " + cursor.getInt(idIx));
            }

            cursor.close();