ActionBar Spinner

MyActivity.java

import android.support.v7.app.ActionBar;
import android.support.v7.app.ActionBarActivity;
import android.os.Bundle;
import android.view.Menu;
import android.view.MenuItem;
import android.widget.ArrayAdapter;
import android.widget.SpinnerAdapter;
import android.widget.TextView;
import android.widget.Toast;


public class MyActivity extends ActionBarActivity  implements ActionBar.OnNavigationListener {

    TextView texto;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_my);

        texto = (TextView) findViewById(R.id.texto);

        ActionBar actionBar = getSupportActionBar();

      

        //crear el spinner
        SpinnerAdapter adapter = ArrayAdapter.createFromResource(this, R.array.lista, android.R.layout.simple_spinner_dropdown_item);
        actionBar.setListNavigationCallbacks(adapter, this);

        //mostrar el spinner
        actionBar.setNavigationMode(ActionBar.NAVIGATION_MODE_LIST);
    }


    @Override
    public boolean onNavigationItemSelected(int i, long l) {
        switch (i) {
            case 0:
                texto.setText("Opcion seleccionada:\n\nLunes");
                break;
            case 1:
                texto.setText("Opcion seleccionada:\n\nMartes");
                break;
            case 2:
                texto.setText("Opcion seleccionada:\n\nMiercoles");
                break;
            case 3:
                texto.setText("Opcion seleccionada:\n\nJueves");
                break;
            case 4:
                texto.setText("Opcion seleccionada:\n\nViernes");
                break;
            case 5:
                texto.setText("Opcion seleccionada:\n\nSabado");
                break;
            case 6:
                texto.setText("Opcion seleccionada:\n\nDomingo");
                break;
        }
        return false;
    }
}

activity_my.xml

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context=".MyActivity">

    <TextView
        android:text="hola"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/texto"
        android:textSize="40dp" />

</RelativeLayout>

strings.xml (carpeta: value)

<?xml version="1.0" encoding="utf-8"?>
<resources>

    <string name="app_name">Spinner</string>
    <string name="hello_world">Hello world!</string>
    <string name="action_settings">Settings</string>

    
        <string-array name="lista">
            <item>Lunes</item>
            <item>Martes</item>
            <item>Miercoles</item>
            <item>Jueves</item>
            <item>Viernes</item>
            <item>Sabado</item>
            <item>Domingo</item>
        </string-array>
    


</resources>

style.xml (carpeta: value)

   <!-- Base application theme. -->
    <style name="AppTheme" parent="Theme.AppCompat.Light">
        <!-- Customize your theme here. -->
    </style>