if I get new LiveData response from Repository everytime, how to set value to val LiveData in ViewModel without Transformations.switchMap()?

I have a question. in browseSample we always Transformations.switchMap() to observe one input LiveData and set the value of repoRepository.search(search) to results. As below:

val results: LiveData<Resource<List<Repo>>> = Transformations
    .switchMap(_query) { search ->
        if (search.isNullOrBlank()) {
            AbsentLiveData.create()
        } else {
            repoRepository.search(search)
        }
    }

but in my case I just click button to get the new results by repoRepository.search(search) every time, this means I don’t have param _query to observe. how can I do? I already defined results as val, so I can’t make results = repoRepository.search(search) in ViewModel everyTime. If I change the repoRepository return type from LiveData<Result> to Result, then I can use results.setValue(result) manually in ViewModel. but is that right to return non-LiveData reuslt from Repository? I’m very confused about that… in many cases we don’t have input params to Observe so we can’t use Transformations.switchMap()

[ukyo6]

16days past, it seems nobody care this question . if I find the best solution whick can point the val LiveData in ViewModel to the new LiveData from repository, I’ll tell you.

[HurryYU]

我也遇到了同样的问题: 如果我只想点击按钮获取数据,没有任何参数的变化,我将无法使用Transformations .switchMap,那么如何保证LiveData的唯一?每次从Repository返回的都是一个新的LiveData,如何将Repository每次返回的LiveData转换为ViewModel中被Activity监听的LiveData,并且保证LiveData对象永远是同一个对象呢?如果你找到了解决方案,希望分享一下,谢谢!

I had the same problem: If I only want to click on the button to get the data, without any parameter changes, I will not be able to use Transformations .switchMap, so how to ensure that LiveData is unique?Each time LiveData returns from Repository is a new LiveData. How to convert LiveData returned by Repository into LiveData in ViewModel monitored by Activity, and ensure that LiveData is always the same object?