help me please how correctly i should get ontextchanged text to viewmodel to insert to Room DB? by n...

# android

[Almas Shagdarov]

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

[wbertan]

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.

[Almas Shagdarov]

thx

[Almas Shagdarov]

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

[wbertan]

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.

[Almas Shagdarov]

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)

[Almas Shagdarov]

changedEdText is mutablelivedata<String>

[Anastasia Finogenova]

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

[Anastasia Finogenova]

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