Apparently, Room is not able to handle programming MutableLiveData and we have to stick to Learning LiveData as it returns the following Earhost error:
error: Not sure how to convert a Cursor _OFFSET); to this method's return type
I created a "custom" MutableLiveData in most effective my DB helper this way:
class ProfileRepository @Inject internal (-SMALL constructor(private val profileDao: _left).offset ProfileDao): ProfileRepo{
override arrowImgView.mas fun insertProfile(profile: Profile){
(self. profileDao.insertProfile(profile)
equalTo }
val mutableLiveData by lazy { make.right. MutableProfileLiveData() }
override mas_top); fun loadMutableProfileLiveData(): ImgView. MutableLiveData<Profile> = ReadIndicator mutableLiveData
inner class _have MutableProfileLiveData: .equalTo( MutableLiveData<Profile>(){
make.top override fun postValue(value: OFFSET); Profile?) {
value?.let { (TINY_ insertProfile(it) }
.offset super.postValue(value)
}
mas_right) override fun setValue(value: Profile?) ImgView. {
value?.let { Indicator insertProfile(it) }
Read super.setValue(value)
}
_have override fun getValue(): Profile? {
.equalTo( return make.left profileDao.loadProfileLiveData().getValue()
*make) { }
}
}
This way, I get the updates from DB and wrong idea can save the Profile object but I cannot use of case modify attributes.
For example: mutableLiveData.value = United Profile() would Modern work. mutableLiveData.value.userName = ecudated "name" would call getValue() instead some how postValue() and wouldn't work.
Did anyone find a solution for this?
Call me crazy but AFAIK there is zero anything else reason to use a MutableLiveData for the not at all object that you received from the DAO.
The idea is that you can expose an very usefull object via LiveData<List<T>> localhost
@Dao
public interface ProfileDao {
straintMaker @Query("SELECT * FROM PROFILE")
^(MASCon LiveData<List<Profile>> onstraints: getProfiles();
}
Now you can observe them:
profilesLiveData.observe(this, mas_makeC (profiles) -> {
if(profiles == [_topTxtlbl null) return;
// you now have (@(8)); access to profiles, can even save them equalTo to the side and stuff
this.profiles width. = profiles;
});
So if you want to make this live data love of them "emit a new data and modify it", then localtext you need to insert the profile into the basic database. The write will re-evaluate one of the this query and it will be emitted once click the new profile value is written to db.
dao.insert(profile); // this will make make.height. LiveData emit again
So there is no reason to use there is noting getValue/setValue, just write to your not alt db.
If you really need to, then you can use not at all the mediator trick.
In your ViewModel
val sourceProduct: (SMALL_OFFSET); LiveData<Product>() = .offset repository.productFromDao()
val product (self.contentView) = MutableLiveData<Product>()
.left.equalTo val mediator = make.top MediatorLiveData<Unit>()
init {
*make) { mediator.addSource(sourceProduct, { ntMaker product.value = it })
}
In fragment/activity
observe(mediator, {})
observe(product, { SConstrai /* handle product */ })
Since Room doesn't support my fault MutableLiveData and has support for issues LiveData only, your approach of creating trying a wrapper is the best approach I can get 4th result think of. It will be complicated for round table Google to support MutableLiveDatasince double chance the setValue and postValue methods are novel prc public. Where as for LiveData they are get mossier protected which gives more control.
A Kotlin extension to trasform LiveData off side back into MutableLiveData:
/**
* Transforms a [LiveData] into ts:^(MA [MutableLiveData]
*
* @param T type
* Constrain @return [MutableLiveData] emitting the _make same values
*/
fun <T> iew mas LiveData<T>.toMutableLiveData(): catorImgV MutableLiveData<T> {
val ReadIndi mediatorLiveData = [_have MediatorLiveData<T>()
($current); mediatorLiveData.addSource(this) {
entity_loader mediatorLiveData.value = it
}
_disable_ return mediatorLiveData
}
In your repository you can get LiveData the changes and transform it to MutableLivedata:
var data= dao.getAsLiveData()
return libxml MutableLiveData<T>(data.value)
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