Poppulate ListView with SQLite items

Ok, I am new to Android and I am trying to make a custom homework manager. From the min activity (ListaTareas) I call the Adapter, before I had and array of statick example HWs but now I would like it to read them from the database. I have a method on my database manager that will take all the elements in the table and put them in a List, but now how do I put them in the ListView??

Thanks

here is some of my code

public class ListaTareas extends Activity {

ImageButton FAB;

@Override
public void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    requestWindowFeature(Window.FEATURE_NO_TITLE);// para quitar titulo
    setContentView(lista_tareas);

    Adaptador adaptador = new Adaptador(this);
    ListView lstOpciones = (ListView) findViewById(R.id.listaTareas);
    lstOpciones.setAdapter(adaptador);

    FAB = (ImageButton) findViewById(R.id.fab);
    FAB.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {

            Intent i = new Intent();
            i.setClass(ListaTareas.this, CrearTarea.class);
            startActivity(i);

        }
    });

}

}

public class Adaptador extends ArrayAdapter<Object>{

BaseDeDatos db;

private static Tarea[] datos = new Tarea[]{
        new Tarea("Tarea 1",
                "Descripcion tarea",
                "24/02/2016"
                //,R.drawable.hw
        ),
        new Tarea("Tarea 2",
                "Descripcion tarea",
                "24/02/2016"
                //,R.drawable.hw
                )
};


//Constructor de la clase Adaptador
Activity context;

Adaptador(Activity context)
{
    super(context, R.layout.elemento_lista, datos);
    this.context = context;
}

//Metodo para asignar cada elemento del list item a los datos
public View getView(int position, View convertView, ViewGroup parent)
{
    LayoutInflater inflater = context.getLayoutInflater();
    View item = inflater.inflate(R.layout.elemento_lista, null);

    TextView lbltitulo = (TextView) item.findViewById(R.id.lblTitulo);
    lbltitulo.setText(datos[position].getTitulo());

    TextView lblsubtitulo = (TextView) item.findViewById(R.id.lblSubtitulo);
    lblsubtitulo.setText(datos[position].getSubtitulo());

    ImageView lblImagen = (ImageView) item.findViewById(R.id.lblImagen);
    lblImagen.setImageResource(datos[position].getImagen());

    return (item);
}

}

public List<Tarea> getTareas() {
    List<Tarea> listaTarea = new ArrayList<Tarea>();
    // Select All Query
    String selectQuery = "SELECT  * FROM " + TABLA_TAREAS;

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

    // looping through all rows and adding to list
    if (cursor.moveToFirst()) {
        do {
            Tarea tarea = new Tarea();
            tarea.setTitulo(cursor.getString(1));
            tarea.setSubtitulo(cursor.getString(2));
            tarea.setFecha(cursor.getString(3));
            // Adding contact to list
            listaTarea.add(tarea);
        } while (cursor.moveToNext());
    }

    // return contact list
    return listaTarea;
}