Kotlin and Android Development featuring Jetpack

Load Data into RecyclerView from Database

The RankingsViewModel class is similar to GameViewModel in that we’re getting an instance of PennyDropRepository, then getting LiveData back. We use the Transformations class to turn Player and GameStatus objects into PlayerSummary objects. Then, once that’s done, we observe the playerSummaries LiveData value from RankingsViewModel inside RankingsFragment and update PlayerSummaryAdapter with the new data. Let’s go through and get each piece created.

Create RankingsViewModel

As I mentioned, this will look similar to GameViewModel in how we get an instance of PennyDropRepository. The entire RankingsViewModel class will look like this, minus the Transformations.map logic (which we’ll cover soon).

class ...