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I have this in my DAO
@Query("SELECT * FROM reminders")
fun getAll(): Flow<List<ReminderEntity>>
This in my Repository
override fun getAllRemindersAsFlow(): Flow<List<Reminder>> {
return mRemindersDao.getAll().map {
Log.e("TAG", "room emitting")
it.map(ReminderEntity::toDomain)
}
}
This in my ViewModel
val reminders = mRemindersRepository.getAllRemindersAsFlow().stateIn(
scope = viewModelScope,
started = SharingStarted.Eagerly,
initialValue = emptyList()
)
val reminders = mRemindersRepository.getAllRemindersAsFlow().distinctUntilChanged { old, new ->
// old and new is equal
// old == new returns true
}.stateIn(
scope = viewModelScope,
started = SharingStarted.Eagerly,
initialValue = emptyList()
)
This in my Fragment's
onViewCreated
lifecycleScope.launch {
mViewModel.reminders.collectLatest { reminders ->
Log.e("TAG", "onViewCreated: Updated", )
when (mBinding.remindersBottomNavigationView.selectedItemId) {
R.id.upcoming_reminders -> if (reminders.isEmpty()) {
mBinding.reminderHelpLabel.setText(R.string.no_upcoming_reminder)
} else mRemindersRecyclerViewAdapter.setReminders(reminders.filter(Reminder::isUpcoming))
R.id.all_reminders -> if (reminders.isEmpty()) {
mBinding.reminderHelpLabel.setText(R.string.click_to_create_a_reminder)
} else mRemindersRecyclerViewAdapter.setReminders(reminders)
}
}
}
So, whenever I'm updating my Reminders I can see Room emitting
in my logs but onViewCreated: Updated
is not getting logged. Also, my UI is not updating.
I added some logs to check if the list is changing
room emitting: ReminderEntity(id=8, title=Test, time=[1035, 1165], days=[Tue], enabled=false)
room emitting: ReminderEntity(id=9, title=Test, time=[1040, 1115, 1110], days=[Sun, Mon, Tue, Wed, Thu, Fri, Sat], enabled=true)
room emitting: ReminderEntity(id=17, title=yui, time=[1415], days=[Sun, Mon, Tue, Wed, Thu, Fri, Sat], enabled=true)
Using UI I disabled one reminder
room emitting: ReminderEntity(id=8, title=Test, time=[1035, 1165], days=[Tue], enabled=false)
room emitting: ReminderEntity(id=9, title=Test, time=[1040, 1115, 1110], days=[Sun, Mon, Tue, Wed, Thu, Fri, Sat], enabled=true)
room emitting: ReminderEntity(id=17, title=yui, time=[1415], days=[Sun, Mon, Tue, Wed, Thu, Fri, Sat], enabled=false)
So, the last reminder is getting changed and the list is getting updated.
If I change my ViewModel
code to this
val reminders = mRemindersRepository.getAllRemindersAsFlow().shareIn(
scope = viewModelScope,
started = SharingStarted.Eagerly,
replay = 1
)
Then it works as expected.
本文标签: androidFlow return by Room with stateIn does not work but shareIn workingStack Overflow
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