How to add items to MutableLiveData arraylist? I have a MainViewModelwith the code: private val locationList: MutableLiveData = MutableLiveData() fun getLocationList(): MutableLiveData = locationList and a fragment where I am trying to add values to the arraylist, but I don't know how: mainViewModel.getLocationList.value = arrayListof(location) //creates always a new list Maybe someone can help me. Thank you