Dzendo

// Declaralion and find SharedPreference from device
        shPr = PreferenceManager.getDefaultSharedPreferences(this /* Activity context */)
        // If you save values between sessions - then false (if there are none, then it will create)

        // Если сохранять значения между сеансами, то false (если их нет, то создаст)
        if (shPr.getBoolean("preference_remember", true))
            preferencesReset(false)  // if not reset at startup to Default
        else
            preferencesReset(true)   // if reset at startup to Default

Dzendo

// Declaralion and find SharedPreference from device
        shPr = PreferenceManager.getDefaultSharedPreferences(this /* Activity context */)
        // If you save values between sessions - then false (if there are none, then it will create)

Dzendo

 viewModel.starClicked.observeEvent(viewLifecycleOwner) {
            Toast.makeText(activity, it, Toast.LENGTH_LONG).show()
        }
        viewModel.keyBoard.observeEvent(viewLifecycleOwner) {
            it?.let {
                if (it) showKeyboard()
                else hideKeyboard()
            }
        }

Dzendo

 private val _starClicked = MutableLiveData<Event<String?>>()
    val starClicked: LiveData<Event<String?>>
        get() = _starClicked

    fun onStarClick() {
        _starClicked.value = Event("on Star ONCE Clicked")
    }

Dzendo

open class Event<out T>(private val content: T? = null) {
    @Suppress("MemberVisibilityCanBePrivate")
    var hasBeenHandled = false
        private set
    //  Returns the content and prevents its use again.
    fun getContentIfNotHandled(): T? = if (hasBeenHandled) null  else content.also { hasBeenHandled = true }
    //  Returns the content, even if it's already been handled.
  fun peekContent(): T? = content
}