How to integrate Room database with other Android components?

Integrating Room database with other Android components allows for efficient data persistence and retrieval in applications. Room provides a robust solution for managing data, enabling smoother interaction between UI components, ViewModels, and repositories.

Room database, Android components, ViewModel, LiveData, Repository pattern

Example of Integrating Room with ViewModel and LiveData


        // Entities
        @Entity(tableName = "users")
        public class User {
            @PrimaryKey(autoGenerate = true)
            private int id;
            private String name;

            // Getters and Setters
        }

        // DAO
        @Dao
        public interface UserDao {
            @Insert
            void insert(User user);

            @Query("SELECT * FROM users")
            LiveData> getAllUsers();
        }

        // Database
        @Database(entities = {User.class}, version = 1)
        public abstract class AppDatabase extends RoomDatabase {
            public abstract UserDao userDao();
        }

        // Repository
        public class UserRepository {
            private UserDao userDao;
            private LiveData> allUsers;

            public UserRepository(Application application) {
                AppDatabase db = Room.databaseBuilder(application, AppDatabase.class, "database-name").build();
                userDao = db.userDao();
                allUsers = userDao.getAllUsers();
            }

            public LiveData> getAllUsers() {
                return allUsers;
            }

            public void insert(User user) {
                new InsertAsyncTask(userDao).execute(user);
            }

            private static class InsertAsyncTask extends AsyncTask {
                private UserDao asyncTaskDao;

                InsertAsyncTask(UserDao dao) {
                    asyncTaskDao = dao;
                }

                @Override
                protected Void doInBackground(final User... params) {
                    asyncTaskDao.insert(params[0]);
                    return null;
                }
            }
        }

        // ViewModel
        public class UserViewModel extends AndroidViewModel {
            private UserRepository repository;
            private LiveData> allUsers;

            public UserViewModel(Application application) {
                super(application);
                repository = new UserRepository(application);
                allUsers = repository.getAllUsers();
            }

            LiveData> getAllUsers() {
                return allUsers;
            }

            public void insert(User user) {
                repository.insert(user);
            }
        }

How to integrate Room database with other Android components?

Example of Integrating Room with ViewModel and LiveData

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How to integrate Room database with other Android components?

Example of Integrating Room with ViewModel and LiveData

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