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help me please how correctly i should get ontextchanged text to viewmodel to insert to Room DB? by not destroying MVVM architecture

We use this way:
In the `Fragment`:
```
        input.addTextChangedListener(object : TextWatcherAdapter() {
            override fun onTextChanged(s: CharSequence?, start: Int, before: Int, count: Int) {
                viewModel.onInputUpdated(s?.toString() ?: "")
            }
        })
```
And in the `viewModel`:
```
    fun onInputUpdated(text: String) {
        //Do stuff
    }
```
We usually also make the `object : TextWatcherAdapter` into a `val` in the `Fragment` to remove the text listener when it is destroyed.

one more question i am getting data in init viewmodel from db and setting it to mediatorlivedata  how can i put mediatorlivedata values to edittext binded mutableLivedata

Well, we usually don’t use the `init` method, we have our own `start` method, so we can “control” when to start, etc.
Then it is straightforward, in the `Fragment` we listen for the live data, and after `start`, it will `post` the data and as the `Fragment` is listening, it will update the views.

in my project i am getting task key by safearg to fragment then in init block of viewmodel making this  task.addSource(database.getTaskContentById(taskKey), changedEtText::setValue)

changedEdText is mutablelivedata&lt;String&gt;

If you want to get and set value to/from edit text to live data you need two-way databinding

One databinding is gonna only set values to your edit text . But judging by the fact you want to use edit text and not text view you probably want to collect user's input too otherwise one way databinding is sufficient