BaseRecyclerViewAdapterHelper is a powerful and flexible RecyclerView adapter library for Android. It simplifies RecyclerView implementation by providing enhanced adapters with features like multiple view types, load more functionality, drag and swipe capabilities, item animations, header/footer support, and DiffUtil integration. The library is architecturally sound with a clean separation of concerns, offering BaseQuickAdapter as its foundation along with specialized adapters for different use cases. It's actively maintained with up-to-date dependencies and demonstrates strong Android engineering practices.
Friendly Eats is an Android restaurant recommendation app that uses Firebase Firestore for real-time data synchronization and Firebase Authentication for user sign-in. The app features a main screen with a filterable and sortable list of restaurants, a detail view for individual restaurants, and the ability to add ratings. The architecture follows Android Jetpack guidelines with a single activity, multiple fragments, ViewModel for UI state, and the Navigation component for fragment transactions. Firestore queries are used to fetch and listen to restaurant data, with transactions ensuring data consistency when adding ratings.
GravitySnapHelper is a mature Android library that extends LinearSnapHelper to snap RecyclerView items to an edge (START, END, TOP, BOTTOM) or CENTER. It provides configurable fling distance limits, scroll speed, snap-to-padding support, and a snap listener. The library also includes GravitySnapRecyclerView, a drop-in RecyclerView subclass that wires up the snap helper with XML attributes, and OrientationAwareRecyclerView to resolve nested RecyclerView touch conflicts. The sample app demonstrates various configurations including horizontal and vertical snapping, decoration-aware snapping, and pager-like behavior. The code is clean, well-documented, and makes effective use of Android's RecyclerView API. It has a strong following (nearly 5000 stars) and receives active maintenance.