java - Android成功构建了gradle但没有在模拟器上安装应用程序

Question

我在使用 Android 架构组件时遇到了一些问题。我想做的是从 View 模型中，我将执行存储库类中的函数。这是我的 View 模型:

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;
}

然后在我的存储库类中:

private final ReservationDao reservationDao;

@Inject
public ReservationRepository(ReservationDao reservationDao) {
    this.reservationDao = reservationDao;
}

public LiveData<List<ReservationEntity>> loadReservations() {
    return reservationDao.getAllReservation();
}

在我的 DAO 类(class)中:

@Query("SELECT * FROM reservation")
LiveData<List<ReservationEntity>> getAllReservation();

我有一个 AppModule 来@Provide @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();
}

我成功地构建了这个项目。但是，在成功构建 gradle 后，它不会将应用程序安装到模拟器上。有任何想法吗？

谢谢!

Answer 1

就我而言，Gradle Sync解决了这个问题。