Android successful built gradle but not install apps on emulator

Question

I was having some problem with Android Architecture Component. What I am trying to do is from the view model, I will execute the functions inside repository class. Here is my view model:

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;
}

Then in my repository class:

private final ReservationDao reservationDao;

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

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

In my DAO class:

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

I got one AppModule to @Provide the @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();
}

I managed to build the project successfully. However, after successfully built gradle, it does not install the apps onto the emulator. Any ideas?

Thanks!

Answer 1

In my case, a Gradle Sync solved the issue.

Answer 2

You can do the following to resolve your problem

• You can turn off the instant Run.

  File>Settings>Build , Execution , Deployment>Instant Run>Uncheck the Instant Run.

After that try to run your app on emulator again.

• Restart Android studio

  File->Invalidate Caches / Restart

• Perform Clean Build

  Build->Clean Project

• Try to Sync your project

  File-> Sync project

• Make sure Project location does not contain the special character.

  E:\Android_Projects\T&PUIET,KUK\app\build\outputs\apk\app-debug.apk

  close android studio > rename folder containing the special character(here T&PUIET,KUK ) > restart android studio.

Hope this Solution helps!