How to use ArrayAdapter<myClass>

ArrayList<MyClass> myList = new ArrayList<MyClass>();

ListView listView = (ListView) findViewById(R.id.list);

ArrayAdapter<MyClass> adapter = new ArrayAdapter<MyClass>(this, R.layout.row,
    to, myList.);
listView.setAdapter(adapter);

Class: MyClass

class MyClass {
    public String reason;
    public long long_val;
}

I have created row.xml in layouts, but don't know how to show both reason and long_val in the ListView using ArrayAdapter.