CODEWITHSUNDEEP
androidmvvmdata-bindingviewmodelautocompletetextview
jericho
jericho

Reputation: 11

How to pass data to ViewModel from AutoCompleteTextView?

I need to pass an id of clicked object from AutoCompleteTextView to ViewModel. Here I have a binding adapter to set a spinner with objects for AutoCompleteTextView.

@BindingAdapter("bindAutocomplete")
fun bindAutocomplete(textView: AutoCompleteTextView, cities: List<City>?){
 cities?.let {
    val adapter = ArrayAdapter<City>(
    textView.context,
    R.layout.support_simple_spinner_dropdown_item,
    it)

    textView.setAdapter(adapter)
 }
}

My question is: where should I place my OnItemClickListener, in this adapter above or in the Fragment class like in code below?

The problem for first way is that I dont know how to access my ViewModel from Binding Adapter. And for the second, if I put this listener in the Fragment class isn`t it breaks a pattern, because initializations of the Biniding Adapter and of the OnItemClickListener are not synchronized?

So I need to pass a city.id to some method in my ViewModel.

binding.autoCompleteTextView.setOnItemClickListener { parent, view, position, id ->
        val city = parent.adapter.getItem(position) as City
        binding.viewModel.getWeatherProperties(city.id)
}

Upvotes: 0

Views: 2262

Answers (2)

jericho
jericho

Reputation: 11

So, I solved this task just by using an Observer, I am not sure if it is even possible to use a Two-way binding with AutoCompleteTextView here. Probably its because of SetOnItemClickListener has no built-in support for two-way data binding.

 viewModel.autocompleteArray.observe(viewLifecycleOwner, Observer {
                it?.let {
                    val adapter = ArrayAdapter<City>(
                        binding.autoCompleteTextView.context,
                        R.layout.support_simple_spinner_dropdown_item,
                        it)

                    binding.autoCompleteTextView.setAdapter(adapter)

                    binding.autoCompleteTextView.setOnItemClickListener { parent, view, 
                    position, id ->

                        val s = parent.adapter.getItem(position) as City
                        viewModel.getWeatherProperties(s.id)
                    }
                }
            })

Upvotes: 0

Jaimil Patel
Jaimil Patel

Reputation: 1347

You can use two way data binding like below to pass data to viewmodel..

 <AutoCompleteTextView  
    android:id="@+id/autoCompleteTextView"  
    android:layout_width="200dp"  
    android:layout_height="wrap_content"  
    android:layout_marginLeft="92dp"  
    android:layout_marginTop="144dp"  
    android:text="@={viewmodel.rememberMe}"  
    app:layout_constraintStart_toStartOf="parent"  
    app:layout_constraintTop_toTopOf="parent" />

Upvotes: 1

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