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Weather

A stunning Weather app for Android and iOS made with Flutter and inspired by a Zuza Wasiak's work.

Challenges

Extra features

The first challenge that I have faced was adding extra features to the app. The work of Zuza Wasiak involves a predetermined number of favorite cities that cannot be added or removed. Thus, the app would only be used to switch between cities and fetch their weather. Since the main goal of this app is to demonstrate my skills, I have included the following features:

• City search
• Weather in the local city
• Pull to refresh
• Settings
• Dynamic theming

UI/UX

Adding new features means designing a user interface. The challenge was to design the interface in such a way that matches the design by Zuza Wasiak. I did all the experiments in Figma.

Weather animations

This challenge is also not related to Flutter. The weather type animations (in the center of HomeScreen) have been recreated with Rive. The animations can be found here.

Development

Packages

The main packages that I have used in the app are as follows:

equatable freezed geolocator http intl json_serializable mocktail provider rive timezone

Architecture

The app consists of two main screens: HomeScreen and CitySearchScreen. The app architecture is shown in the diagram below.

Actually, not all relations are illustrated here. App widget has a dependency on DynamicTheme. Besides, SplashScreen initializes FavoriteCitiesRepository, LocalCityRepository, Location and Preferences.

CitySearchScreen is a screen where a user can find a city with autocomplete. When the user starts typing one triggers SearchAutocomplete.onQuery which in its turn calls WeatherApi.getCompletion. Finally, the city selected by the user is returned to HomeScreen and added to the favorite cities list.

HomeScreen is a screen that shows weather. As one can see from the diagram HomeScreen has 4 dependencies:

1. DynamicTheme
   Changes theme when sliding between pages, i.e., cities.
2. Preferences
   Manages measure units (Celsius or Fahrenheit, km/h or m/s, hPa or mmHg) in which weather is displayed.
3. Location
   Tracks the location service status and the location permission. When one of them changes notifies Weather.
4. Weather
   Manages local and favorite cities.

State management

A pair of Provider + ChangeNotifier is used as state management in the app.

Improvements

Minor

• Pull to refresh behavior in CircularRefreshIndicator
  Pulling the screen down in HomeScreen can be improved in the following way. When a user pulls the screen down to a certain extent, haptic feedback is triggered and refreshing starts. That is the app does not wait for the user to release the screen.
• Scroll up behavior in PersistentAppBar
  Currently, the bar only shrinks when scrolling down. It would be more natural (at least on iOS) for the large title to expand slightly when scrolling up.
• Reorder the favorite cities list in HomeDrawer

Major

• Localization
  The app already supports internationalization. Thus, it must be easy to add new languages.
• Authentication
  Authentication will allow to save a user preferences and favorite cities on a server. Thus, the user easily can change the device and import the data.
• Notifications
  The idea is to notify a user with a forecast for the day in the morning (or in other fixed time).
• Week forecast
  At the moment, the app shows weather for the current day. Therefore, the app seems incomplete without week forecasts.