How can I implement a String variable instead of 'Landschaft'?

I have created a SpinnerActivity, which looks like following:

http://ift.tt/1NuaeBi

Now for example if I select 'Landschaft' (in English: landscape) I want to search in the DatabaseHandler.java for a location which is in the category 'Landschaft' (landscape)

Therefore I have written the following method in DatabaseHandler.java:

In this method, I have just written Kategorie = Landscape.

However I want, that the selected SpinnerArray (Landschaft, Brücken...etc.) in my Spinner would be inserted in my DatabaseHandler instead of "Landschaft", how can I do that?

public List<Position> getAllPositionsWithCategory() {
        List<Position> positionList = new ArrayList<Position>();

        String selectQuery = "SELECT * FROM " + TABLE_POSITIONS
                + " WHERE Kategorie = 'Landschaft'";

        SQLiteDatabase db = this.getWritableDatabase();

        Cursor cursor = db.rawQuery(selectQuery, null);

        // looping through all rows and adding to list

        if (cursor.moveToFirst()) {

            do {

                Position position = new Position();

                position.setID(Integer.parseInt(cursor.getString(0)));

                position.setName(cursor.getString(1));

                position.setKategorie(cursor.getString(2));

                position.setLaenge(cursor.getFloat(3));

                position.setBreite(cursor.getFloat(4));

                // Adding position to list

                positionList.add(position);

            } while (cursor.moveToNext());

        }
}