Minimalist Flutter Todo App, built using BLoC pattern

Related tags

Open Source Apps dart task todo minimalist flutter deer bloc bloc-pattern flutter-bloc-pattern
Overview

Deer

Minimalist Todo Planner app built around the idea of efficiency and clean aesthetic.

Showcase
Get it on Google Play

Development

Deer uses BLoC (Business Logic Component) pattern to manage app state. If you want to use Streams in your Flutter project, then I think this is the way to go. BLoC plays exceptionally well with Flutter's reactive nature, especially since Flutter has built-in StreamBuilder widget.

Each screen is splitted into 4 files:

  • actions
  • bloc
  • screen (UI itself)
  • state

Instead of calling setState() in screen file, an action is pushed to bloc's input Stream<Action>. Then, bloc resolves that action and updates the output Stream<State>. Every state update is listened to inside screen with StreamBuilder, which updates the UI when needed. This way we achieve clear separation of concerns.

Usually with BLoC, Sink is used for input Stream, and BehaviorSubject for output Stream.

Check those resources for more details on the pattern:

Using built_value

flutter packages pub run build_runner build --delete-conflicting-outputs
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Comments
  • Can not build from source code on Windows 10

    Can not build from source code on Windows 10

    This kind of error:

    
* Error running Gradle:
ProcessException: Process "C:\Users\koke\Downloads\deer-master\android\gradlew.bat" exited abnormally:
FAILURE: Build failed with an exception.
* Where:
Build file 'C:\Users\koke\Downloads\deer-master\android\app\build.gradle' line: 52
* What went wrong:
A problem occurred evaluating project ':app'.
> path may not be null or empty string. path='null'
* Try:
Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output. Run with --scan to get full insights.
* Get more help at https://help.gradle.org
BUILD FAILED in 1s
  Command: C:\Users\koke\Downloads\deer-master\android\gradlew.bat app:properties
Please review your Gradle project setup in the android/ folder.
Exited (sigterm)
    opened by KanybekMomukeyev 5
  • Compiler error

    Compiler error

    Compiler message: lib/presentation/screen/calendar/calendar_screen.dart:184:7: Error: No named parameter with the name 'onFormatChanged'. onFormatChanged: _onCalendarFormatChanged, ^^^^^^^^^^^^^^^ file:///Users/bsturza/Desktop/Development/flutter/.pub-cache/hosted/pub.dartlang.org/table_calendar-1.1.4/lib/table_calendar.dart:127:3: Context: Found this candidate, but the arguments don't match. TableCalendar({

    opened by sturza 3
Owner
Aleksander Woźniak
Flutter and Kotlin enthusiast, creator of ShapeQuest mobile game
Aleksander Woźniak
GitHub
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