Why does my app stop when choosing option in Spinner?

I have one Spinnerthat works like this, I select an option and it sends the text to editTextZodiaco, the texts are displayed correctly in my Spinner, but when I select an option to send it to editTextZodiacothe application it stops, logcatit marks the following:

java.lang.ArrayIndexOutOfBoundsException: length=0; index=4

clase

       String[] zodiaco = {};
    int flags[] = {R.drawable.icon_zod_elig, R.drawable.icon_zod_no, R.drawable.icon_zod_acuario, R.drawable.icon_zod_piscis, R.drawable.icon_zod_aries, R.drawable.icon_zod_tauro, R.drawable.icon_zod_geminis, R.drawable.icon_zod_cancer, R.drawable.icon_zod_leo, R.drawable.icon_zod_virgo, R.drawable.icon_zod_libra, R.drawable.icon_zod_escorpio, R.drawable.icon_zod_sagitario, R.drawable.icon_zod_capricornio};

 @Override
    public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
        if(position == 1){
            editTextZodiaco.setText(" ");
        }else if(position !=0){
            String description = zodiaco[position];
            editTextZodiaco.setText(description.split(" ")[0]);
        }
    }


    @Override
    public void onNothingSelected(AdapterView<?> parent) {

    }

    CustomAdapter customAdapter = new CustomAdapter(getApplicationContext(), flags, zodiaco);
        spin.setOnItemSelectedListener(this);
        spin.setAdapter(customAdapter);

CustomAdapter:

public class CustomAdapter extends BaseAdapter {
    Context context;
    int flags[];
    String[] titulo_zodiaco;
    LayoutInflater inflter;

    public CustomAdapter(Context applicationContext, int[] flags, String[] titulo_zodiaco) {
        this.context = applicationContext;
        this.flags = flags;
        this.titulo_zodiaco = titulo_zodiaco;
        inflter = (LayoutInflater.from(applicationContext));
    }

    @Override
    public int getCount() {
        return flags.length;
    }

    @Override
    public Object getItem(int i) {
        return null;
    }

    @Override
    public long getItemId(int i) {
        return 0;
    }

    @Override
    public View getView(int i, View view, ViewGroup viewGroup) {
        view = inflter.inflate(R.layout.custom_spinner_items, null);
        ImageView icon = (ImageView) view.findViewById(R.id.imagenspinner);
        TextView names = (TextView) view.findViewById(R.id.textspinner);

//////// carga los textos de array

        String[] titulo_zodiaco = context.getResources().getStringArray(R.array.titulos_zodiaco);

        icon.setImageResource(flags[i]);
        names.setText(titulo_zodiaco[i]);
        return view;
    }
}

array:

  <array name="titulos_zodiaco">
        <item>Elige un Zodiaco</item>
        <item>No quiero ninguno</item>
        <item>Acuario (Ene. 20 - Feb. 18)</item>
        <item>Piscis (Feb. 19 - Marzo 20)</item>
        <item>Aries (Marzo 31 - Abril 19)</item>
        <item>Tauro (Abril 20 - Mayo 20)</item>
        <item>Géminis (Mayo 21 - Junio 20)</item>
        <item>Cáncer (Junio 21 - Julio 22)</item>
        <item>Leo (Julio 23 - Agosto 22)</item>
        <item>Virgo (Agosto 23 - Sep. 22)</item>
        <item>Libra (Sep. 23 - Oct. 22)</item>
        <item>Escorpio (Oct. 23 - Nov. 21)</item>
        <item>Sagitario (Nov. 22 - Dic. 21)</item>
        <item>Capricornio (Dic. 22 - Ene. 19)</item>
    </array>

EDIT2 : @Jorgesys

Clase

public class SeccionActivity extends Activity implements AdapterView.OnItemSelectedListener {

    private TextView editTextZodiaco;

    String[] zodiaco = getResources().getStringArray(R.array.titulos_zodiaco);
    int flags[] = {R.drawable.icon_zod_elig, R.drawable.icon_zod_no, R.drawable.icon_zod_acuario, R.drawable.icon_zod_piscis, R.drawable.icon_zod_aries, R.drawable.icon_zod_tauro, R.drawable.icon_zod_geminis, R.drawable.icon_zod_cancer, R.drawable.icon_zod_leo, R.drawable.icon_zod_virgo, R.drawable.icon_zod_libra, R.drawable.icon_zod_escorpio, R.drawable.icon_zod_sagitario, R.drawable.icon_zod_capricornio};

    @Override
    public void onItemSelected(AdapterView<?> parent, View view, int position, long id) {
        if (position == 1) {
            editTextZodiaco.setText(" ");
        } else if (position != 0) {
            String description = zodiaco[position];
            editTextZodiaco.setText(description.split(" ")[0]);
        }
    }


    @Override
    public void onNothingSelected(AdapterView<?> parent) {

    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activit_seccion);

        editTextZodiaco = (TextView) findViewById(R.id.editTextZodiaco);
        Spinner spin = (Spinner) findViewById(R.id.spinnerzodiaco);


        CustomAdapter customAdapter = new CustomAdapter(getApplicationContext(), flags, zodiaco);
        spin.setOnItemSelectedListener(this);
        spin.setAdapter(customAdapter);
    }
}