android-viewmodel

问题 I am trying to update a RecyclerView when a room database is changed. However the onChanged method of the observer defined in the MainActivity does not get called, when a change to the database occurs. If I let the DAO return LiveData instead of a List<> and use LiveData in my ViewModel it works as intended. However I need MutableLiveData as I want to change my query to the database during runtime. My setup: MainActivity.java BorrowedListViewModel viewModel = ViewModelProviders.of(this).get

问题 I am trying to update a RecyclerView when a room database is changed. However the onChanged method of the observer defined in the MainActivity does not get called, when a change to the database occurs. If I let the DAO return LiveData instead of a List<> and use LiveData in my ViewModel it works as intended. However I need MutableLiveData as I want to change my query to the database during runtime. My setup: MainActivity.java BorrowedListViewModel viewModel = ViewModelProviders.of(this).get

问题 I am trying to update a RecyclerView when a room database is changed. However the onChanged method of the observer defined in the MainActivity does not get called, when a change to the database occurs. If I let the DAO return LiveData instead of a List<> and use LiveData in my ViewModel it works as intended. However I need MutableLiveData as I want to change my query to the database during runtime. My setup: MainActivity.java BorrowedListViewModel viewModel = ViewModelProviders.of(this).get

问题 I want to have a base activity class that takes care of some initialization I started defining it like this. abstract class BaseActivity<VIEW_MODEL : ViewModel, BINDING : ViewDataBinding> : AppCompatActivity() { lateinit var viewmodel: VIEW_MODEL lateinit var binding: BINDING lateinit var glide: RequestManager @get:LayoutRes abstract val layoutResource: Int override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) binding = DataBindingUtil.setContentView(this,

问题 I want to have a base activity class that takes care of some initialization I started defining it like this. abstract class BaseActivity<VIEW_MODEL : ViewModel, BINDING : ViewDataBinding> : AppCompatActivity() { lateinit var viewmodel: VIEW_MODEL lateinit var binding: BINDING lateinit var glide: RequestManager @get:LayoutRes abstract val layoutResource: Int override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) binding = DataBindingUtil.setContentView(this,

问题 I have a reminder notification that is sent every few days. The sending of that notification is triggered with a repeating AlarmManager . The notification itself is built in the onReceive of my BroadcastReceiver (as described here). So when onReceive is triggered, the app is not even open/running. Now at that point I want to access my (local) SQLite database and get the correct content to build the notification with, but how would I get a ViewModelProvider (xxx in the code) in this place to

问题 I have a reminder notification that is sent every few days. The sending of that notification is triggered with a repeating AlarmManager . The notification itself is built in the onReceive of my BroadcastReceiver (as described here). So when onReceive is triggered, the app is not even open/running. Now at that point I want to access my (local) SQLite database and get the correct content to build the notification with, but how would I get a ViewModelProvider (xxx in the code) in this place to

问题 I have a reminder notification that is sent every few days. The sending of that notification is triggered with a repeating AlarmManager . The notification itself is built in the onReceive of my BroadcastReceiver (as described here). So when onReceive is triggered, the app is not even open/running. Now at that point I want to access my (local) SQLite database and get the correct content to build the notification with, but how would I get a ViewModelProvider (xxx in the code) in this place to

问题 I'm using LiveData to fetch data from a server and observe it. My onChanged() method just gets called the first time, and does not get called when data in the server gets updated. UserFragment: UserViewModel userViewModel = ViewModelProviders.of(this).get(UserViewModel.class); userViewModel.getUser().observe(this, new Observer<User>() { @Override public void onChanged(User user) { //Set UI } }); UserViewModel: public class UserViewModel extends AndroidViewModel { private LiveData<User> user;

问题 I have been trying, without success, to do some UI tests on Android. My app follows the MVVM architecture and uses Koin for DI. I followed this tutorial to properly set up a UI test for a Fragment with Koin, MockK and Kakao. I created the custom rule for injecting mocks, setup the ViewModel, and on the @Before call, run the expected answers and returns with MockK. The problem is that, even when the fragment's viewmodel's LiveData object is the same as the testing class's LiveData object, the