DBConfig dbConfig = new DBConfig.Builder(context) .setDatabaseName("mydb") .setDatabaseVersion(1) .setObjectMapper(new MyObjectMapper()) .build(); DBTools dbTools = DBTools.getDbInstance(dbConfig); User user = new User("John", "Doe"); dbTools.insert(user); List<User> userList = dbTools.query(User.class) .where("age", ">", 18) .orderBy("name") .limit(10) .execute(); userList.get(0).setAge(20); dbTools.update(userList.get(0)); dbTools.delete(userList.get(0));