我在使用Android Architecture组件时遇到了一些问题。我尝试的做法是从ViewModel中调用存储库类中的函数。以下是我的ViewModel：
private final ReservationRepository reservationRepository;
private final UserRepository userRepository;
private LiveData<List<ReservationEntity>> reservations;
@Inject
public ReservationViewModel(ReservationRepository reservationRepository, UserRepository userRepository) {
this.reservationRepository = reservationRepository;
this.userRepository = userRepository;
reservations = reservationRepository.loadReservations();
}
public LiveData<List<ReservationEntity>> getAllReservations() {
return reservations;
}
然后在我的仓库类中：
private final ReservationDao reservationDao;
@Inject
public ReservationRepository(ReservationDao reservationDao) {
this.reservationDao = reservationDao;
}
public LiveData<List<ReservationEntity>> loadReservations() {
return reservationDao.getAllReservation();
}
@Query("SELECT * FROM reservation")
LiveData<List<ReservationEntity>> getAllReservation();
我有一个 AppModule 来提供 @Inject:
@Provides
@Singleton
ReservationDatabase provideReservationDatabase(Application application) {
return Room.databaseBuilder(application,ReservationDatabase.class,
ReservationDatabase.DATABASE_NAME).allowMainThreadQueries().build();
}
@Provides
@Singleton
ReservationDao provideReservationDao(ReservationDatabase reservationDatabase) {
return reservationDatabase.reservationDao();
}
我成功构建了项目。但是，在成功构建 Gradle 后，它不会安装应用程序到模拟器上。有什么想法吗？
谢谢！
