Patterns: Combining RecyclerView, LiveData and Firebase Cloud Firestorefrom the CommonsWare Community archives
At July 11, 2019, 3:28pm, jQrgen asked:
Hello CommonsWare & Forum!
Has anyone got pointers on the best patterns for combining RecyclerView and LiveData using firebase firestore?
Also, simple patterns for combining RecyclerView and LiveData are appreciated!
At July 11, 2019, 4:00pm, mmurphy replied:
I have never used Firestore, sorry.
That is very broad. FWIW, I show some in Elements of Android Jetpack, such as in the Room chapter. Also, the to-do app built in the tutorials in Exploring Android use
RecyclerView in the
In these, I use a variant of the Model-View-Intent (MVI) architecture. The
LiveData is emitting view-states, containing the data to be displayed. The activity or fragment observes the
LiveData and renders the UI based on that view-state. In the case of
RecyclerView, the view-state contains a
List of row-states to be rendered, and the
RecyclerView.ViewHolder implementations handle that. My samples mostly use
ListAdapter as the
RecyclerView.Adapter base, so the
LiveData observer just calls
submitList() with the list of row-states, and the rest is handled by the