An Android weather application implemented using the MVVM pattern, Retrofit2, Dagger Hilt, LiveData, ViewModel, Coroutines, Room, Navigation Components, Data Binding and some other libraries from the Android Jetpack . Instant Weather fetches data from the OpenWeatherMap API to provide real time weather information. It also makes use of the Algolia Instant Search service which enables you search for weather conditions of various locations.

Architecture

The architecture of this application relies and complies with the following points below:

• A single-activity architecture, using the Navigation Components to manage fragment operations.
• Pattern Model-View-ViewModel(MVVM) which facilitates a separation of development of the graphical user interface.
• Android architecture components which help to keep the application robust, testable, and maintainable.

Technologies used:

• Retrofit a REST Client for Android which makes it relatively easy to retrieve and upload JSON (or other structured data) via a REST based webservice.
• Dagger Hilt for dependency injection.
• ViewModel to store and manage UI-related data in a lifecycle conscious way.
• LiveData to handle data in a lifecycle-aware fashion.
• Navigation Component to handle all navigations and also passing of data between destinations.
• Timber - a logger with a small, extensible API which provides utility on top of Android's normal Log class.
• Algolia Search API - Android to quickly and seamlessly implement search within the application.
• Work Manager to manage Android background jobs.
• Material Design an adaptable system of guidelines, components, and tools that support the best practices of user interface design.
• Coroutines used to manage the local storage i.e. writing to and reading from the database. Coroutines help in managing background threads and reduces the need for callbacks.
• Data Binding to declaratively bind UI components in layouts to data sources.
• Room persistence library which provides an abstraction layer over SQLite to allow for more robust database access while harnessing the full power of SQLite.
• Paging Library helps you load and display small chunks of data at a time.
• Android KTX which helps to write more concise, idiomatic Kotlin code.
• Preferences to create interactive settings screens.

Installation

Instant Weather requires a minimum API level of 21. Clone the repository. You will need an API key i.e. API_KEY from Open Weather to request data. If you don’t already have an account, you will need to create one in order to request an API Key. Also, you will need to create an app on Algolia.

Generate a search only API key i.e. ALGOLIA_API_KEY, the APP ID i.e. ALGOLIA_APP_ID for the app you created and then create an Index under that app, you will need the index name i.e. ALGOLIA_INDEX_NAME to setup the search functionality in this application. You can populate the index with records from here.

Each record follows this structure:

{
    "objectID": "ffe74e4cdddbc_dashboard_generated_id",
    "country": "Zimbabwe",
    "geonameid": 1085510,
    "name": "Epworth",
    "subcountry": "Harare"
}

In your project's root directory, inside the local.properties file (create one if unavailable) include the following lines:

API_KEY = "YOUR_API_KEY"
ALGOLIA_API_KEY = "YOUR_API_KEY"
ALGOLIA_APP_ID = "YOUR_APP_ID"
ALGOLIA_INDEX_NAME = "YOUR_INDEX_NAME"

Contribution

All contributions are welcome. If you are interested in seeing a particular feature implemented in this app, please open a new issue after which you can make a PR!

LICENSE

MIT License

Copyright (c) 2020 Mayokun Adeniyi

Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all
copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
SOFTWARE.