Saving nested foreign objects with ORMLite on Android
@DatabaseTable
public class Parent {

  @DatabaseField(generatedId=true)
  public int id;

  @DatabaseField
  public String name;

  @DatabaseField
  public Child child;
}

@DatabaseTable
public class Child {

  @DatabaseField(generatedId=true)
  public int id;

  @DatabaseField
  public String name;
}

Parent parent = new Parent();
parent.name = "ParentName";

Child child = new Child();
child.name = "ChildName";

parent.child = child;

//  .. get helper and create dao object...
dao.create(parent);

Parent parent = new Parent();
parent.name = "ParentName";

Child child = new Child();
child.name = "ChildName";

parent.child = child;

// this will update the id in child
childDao.create(child);

// this saves the parent with the id of the child
parentDao.create(parent);

// assuming the id of the Parent is the name
Parent parent = parentDao.queryForId("ParentName");
System.out.println("Child id should be set: " + parent.child.id);
System.out.println("Child name should be null: " + parent.child.name);

// now we refresh the child object to load all of the fields
childDao.refresh(parent.child);
System.out.println("Child name should now be set: " + parent.child.name);

// Debugging identity tag
    public static final String TAG = DatabaseHelper.class.getName();

    // Static map of common DAO objects
    @SuppressWarnings("rawtypes")
    private static final Map<Class, Dao<?, Integer>> sDaoClassMap = new HashMap<Class, Dao<?,Integer>>();

    /**
     * Persist an entity to the underlying database.
     *
     * @param context
     * @param entity
     * @return boolean flag indicating success
     */
    public static boolean create(Context context, Entity entity) {
        // Get our database manager
        DatabaseHelper databaseHelper = DatabaseHelper.getHelper(context);

        try {
            // Recursively save entity
            create(databaseHelper, entity);

        } catch (IllegalArgumentException e) {
            Log.e(TAG, "Object is not an instance of the declaring class", e);
            return false;
        } catch (IllegalAccessException e) {
            Log.e(TAG, "Field is not accessible from the current context", e);
            return false;
        } catch (SQLException e) {
            Log.e(TAG, "Unable to create object", e);
            return false;
        }

        // Release database helper
        DatabaseHelper.release();

        // Return true on success
        return true;
    }

    /**
     * Persist an entity to the underlying database.<br><br>
     * For each field that has a DatabaseField annotation with foreign set to true,
     * and is an instance of Entity, recursive attempt to persist that entity as well.
     *
     * @param databaseHelper
     * @param entity
     * @throws IllegalArgumentException
     * @throws IllegalAccessException
     * @throws SQLException
     */
    @SuppressWarnings("unchecked")
    public static void create(DatabaseHelper databaseHelper, Entity entity) throws IllegalArgumentException, IllegalAccessException, SQLException {
        // Class type of entity used for reflection
        @SuppressWarnings("rawtypes")
        Class clazz = entity.getClass();

        // Search declared fields and save child entities before saving parent.
        for(Field field : clazz.getDeclaredFields()) {
            // Inspect annotations
            for(Annotation annotation : field.getDeclaredAnnotations()) {
                // Only consider fields with the DatabaseField annotation
                if(annotation instanceof DatabaseField) {
                    // Check for foreign attribute
                    DatabaseField databaseField = (DatabaseField)annotation;
                    if(databaseField.foreign()) {
                        // Check for instance of Entity
                        Object object = field.get(entity);
                        if(object instanceof Entity) {
                            // Recursive persist referenced entity
                            create(databaseHelper, (Entity)object);
                        }
                    }
                }
            }
        }

        // Retrieve the common DAO for the entity class
        Dao<Entity, Integer> dao = (Dao<Entity, Integer>) sDaoClassMap.get(clazz);
        // If the DAO does not exist, create it and add it to the static map
        if(dao == null) {
            dao = BaseDaoImpl.createDao(databaseHelper.getConnectionSource(), clazz);
            sDaoClassMap.put(clazz, dao);
        }

        // Persist the entity to the database
        dao.create(entity);
    }

@DatabaseField(foreign = true,foreignAutoCreate = true,foreignAutoRefresh = true)
public Child child;