How to get value in kotlin?

Question

I remember that in kotlin language there is a option to get value by get() property, but can't find how to write it.

What I mean is: I have a LiveData into my ViewModel and I need that access to post in LiveData has only ViewModel and outside just option to get for subscribe.

How I implemented it for now is

class MyViewModel(ctx: Context) : AndroidViewModel(ctx as Application)
{
    private val _showLoadingPB = SingleLiveEvent<Boolean>()

    fun showLoadingPB(): SingleLiveEvent<Boolean>
    {
        return _showLoadingPB
    }
...
}

But I remember that there is an option to write it like this

class MyViewModel(ctx: Context) : AndroidViewModel(ctx as Application)
{
    private val _showLoadingPB = SingleLiveEvent<Boolean>()

    val showLoadingPB: SingleLiveEvent<Boolean>
        get() => _showLoadingPB
}

How to make it works?

Sirop4ik · Accepted Answer · 2020-04-13 07:52:20Z

1

I remembered how it should be

class MyViewModel(ctx: Context) : AndroidViewModel(ctx as Application)
{
    private val _showLoadingPB = SingleLiveEvent<Boolean>()

    val showLoadingPB: LiveData<Boolean>
        get() = _showLoadingPB
}

This way user can't assign new value to your SingleLiveEvent as well as post new event in LiveData, he can just observe it.

answered Apr 13, 2020 at 7:52

Sirop4ik

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