list2-android

This is a simple list mobile app (to-do list, tasks, shopping list, recipes, and the like) showcasing the implementation of CRUD operations with various Android technologies and patterns, including:

• Single-activity architecture with Navigation component
• MVVM pattern with ViewModel and LiveData
• Jetpack Compose
  • Migrated from View-based UI, using ComposeView
  • State hoisting with MutableState and ViewModel
  • Access ViewModel from composable using the viewModel() function
  • Composable preview
  • Side-effect API
• View Binding
• Room persistence library
• Repository pattern
• Singleton pattern for database and repository
• Coroutines

Features

• Display a list of items (RecyclerView, LiveData)
• Navigate to a page to add or edit items (Navigation component, Safe Args, TextField with FocusRequester and TextFieldValue)
• Swipe to delete items (ItemTouchHelper)
• Store items in database (Room, coroutines)
• Database migration

Widget

This project also implements a widget that can be added to the Home screen, with the following features:

• Display a list of items from the app's database (ListView, RemoteViewsService, RemoteViewsFactory, Room)
• Tap widget title bar to launch the app (PendingIntent.getActivity())
• Tap the Add button to launch the app's New Item screen (NavDeepLinkBuilder)
• Tap a list item to launch the app's Edit Item screen (PendingIntent template, fill-in Intent, NavDeepLinkBuilder with arguments)
• Widget will be updated when list items are modified from the app (Broadcast using the ACTION_APPWIDGET_UPDATE Intent)

Requirements

• Android Studio Bumblebee | 2021.1.1 Patch 2 or newer
• Android 5.0 (API level 21) or higher
• Kotlin 1.6 or higher