streetcomplete

This is a short and high-level overview what to find in which package

• data - Everything concerning data management, persistence, upload, download

  • download - Download service, automatic download behavior (strategy), and persist which tiles have been downloaded already
  • edithistory - Control of user's edit history, undoing etc.
  • elementfilter - Parser and data model for the "Element filter expression" (Overpass-Wizard-like syntax used to filter OSM elements)
  • maptiles - Downloader and cache for (vector) map tiles of the background map
  • meta - Parsing and data model for country- or locale-specific metadata
  • messages - Control of messages shown to the user
  • osm - Management, download, persistence and upload of OSM map data: OSM map data itself, its geometry, quests generated from that and edits made on that data
  • osmnotes - Management, download, persistence and upload of OSM notes data: OSM notes data itself, quests generated from that, edits made on that data, attaching and upload of photos
  • overlays - Management and persistence of selected overlay
  • quest - Management of quests, automatic upload behavior
  • sync - Android intent service and notification for upload / download
  • upload - Upload service
  • user - Management and persistence of user login, user data, statistics, achievements and unlocked links
  • visiblequests - Management and persistence of quest type order, enablement and quest presets

• osm - Parsers, data model and other stuff dealing with OpenStreetMap tagging logic. Some tagging logic is (still) in the quests package

• overlays - Overlay definitions, forms and associated logic

• quests - Quest type definitions, quest forms and associated logic

• screens - Everything for the different screens in the app: activities, fragments, adapters, dialogs, custom views, drawables, ...

  • about - About screen
  • main - Main screen: The map, the controls (buttons etc.), edit history sidebar, notifications
  • measure - AR measuring screen
  • settings - Settings screen, quest selection and quest preset selection screens
  • tutorial - Tutorial screen
  • user - User screen: Login, profile, statistics, link collection, achievements, ...

• util - General purpose utility and convenience functions, classes etc. Specifically view-related stuff is usually in the view package

  • ktx - Extension functions (usually to classes outside this project)
  • location - Utilities to request location (permission)
  • math - Math utilities, chiefly geodesy (math assuming a spherical Earth)

• view - Generic views and related classes used in various places: dialogs, adapters, custom views, view controllers, drawables, ...