LiveData - Databinding returns null when using LiveData

Question

I stumbled upon a problem while coding my application. I'm using databinding for display data on the screen - for that I use LiveData. My problem is that the binding always returns null, but if I observe this data it gives back the right result. What do I do wrong? (I'm talking about feelsLikeDegree livedata)

XML code:

<TextView
        android:id="@+id/tv_degrees_feels_like"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="30dp"
        android:text="@{@string/feels_like(String.valueOf(viewmodel.feelsLikeDegree))}"
        android:textSize="13sp"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@id/tv_degrees" />

ViewModel:

@HiltViewModel
@SuppressLint("StaticFieldLeak")
class WeatherViewModel @Inject constructor(
    @ApplicationContext private val context: Context,
    private val repository: WeatherRepository
): ViewModel() {

    private val _resp = MutableLiveData<WeatherResponse>()
    val weatherResp: LiveData<WeatherResponse>
        get() = _resp

    private val _feelsLikeDegree = MutableLiveData<Double>()
    val feelsLikeDegree: LiveData<Double>
        get() = _feelsLikeDegree


    init {
        getWeather()
    }

    private fun getWeather() = viewModelScope.launch {
        if (hasInternetConnection()) {
            repository.getWeatherInfo("47.497913", "19.040236", listOf(), "metric", API_KEY)
                .let { response ->
                    if (response.isSuccessful) {
                        _resp.postValue(response.body())
                        _feelsLikeDegree.postValue(response.body()?.current?.feels_like)
                    }
                }
        } else {
            Log.e("asdfg", "no internet")
        }
    }
}

Answer 1

也许您忘记在您的活动或片段中设置 binding.lifecycleOwner