[FR]: Provide examples of consuming UI events exactly once

[StylianosGakis]

Is there an existing issue for this?

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Describe the problem

Since this seems to have become the most up to date modern android development sample, I think it would be a great idea to have it include at least one example of how one-time UI events should be handled. I am referring to this section https://developer.android.com/topic/architecture/ui-layer/events#views_3 from the documentation, which pushes people away from LiveData, Channel and other such approaches. To further assist devs into taking this approach instead, this sample could serve as an example of how to this right in a fully fledged app.

Describe the solution

Particularly it'd be interesting to see handling one-time events like showing something to the screen once and then clearing the state as it's handled, or even more so, consuming events that require the app to navigate somewhere else. In my opinion these are two super common use cases while creating apps that would be great to exist inside the most up-to-date app example provided officially from Google.

Additional context

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