Add SQLite database data to Listview

I checked out this tutorial: http://ift.tt/1e3HL0t

Now I want to load this data in a Listview. Here is my try:

private ArrayAdapter<Contact> adapter;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);


        DatabaseHandler db = new DatabaseHandler(this);

        /**
         * CRUD Operations
         * */
        // Inserting Contacts
        Log.d("Insert: ", "Inserting ..");
        db.addContact(new Contact("Ravi", "9100000000"));
        db.addContact(new Contact("Srinivas", "9199999999"));
        db.addContact(new Contact("Tommy", "9522222222"));
        db.addContact(new Contact("Karthik", "9533333333"));

        // Reading all contacts
        Log.d("Reading: ", "Reading all contacts..");
        List<Contact> contacts = db.getAllContacts();

        for (Contact cn : contacts) {
            String log = "Id: " + cn.getID() + " ,Name: " + cn.getName() + " ,Phone: " + cn.getPhoneNumber();
            // Writing Contacts to log
            Log.d("Name: ", log);

        }


        // create the adapter using the cursor pointing to the desired data
        //as well as the layout information
        adapter = new ArrayAdapter<Contact>(getApplicationContext(), R.layout.list_view, contacts);


        ListView listView = (ListView) findViewById(R.id.list);
        // Assign adapter to ListView
        listView.setAdapter(dataAdapter);

    }

So the Class from the Contact you can see in the url from androidhive.