An Android to-do app with tasks, descriptions, dates, durations, web links, context, and status. Tasks are stored locally in SharedPreferences as JSON via Gson, displayed in a ListView, and can be sorted by date, status, duration, or context.
The app is simple but not empty : there are separate activities for creating tasks, listing them, viewing/editing details, and opening web links. The storage choice is the quirky bit—using a StringSet of serialized tasks works for a class project, even if a real app would probably reach for Room or another database.
Open it in Android Studio, sync Gradle, and run the app module on an emulator or device. If the SDK path is wrong, update local.properties.