The Complete RESTful APIs for Android Course [2019]

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Increase your mobile development skills with this comprehensive course on RESTful APIs and Kotlin in Android.  This course will walk you through all the steps needed to build a weather forecasting application in Android Studio.  Learn not only how to create robust applications with dynamic data, but the skills necessary to use APIs for your own applications.

You will learn how to:

  • Set up your application in Android Studio and test it
  • Retrieve data from an API
  • Convert JSON and XML strings into appropriate Kotlin data classes
  • Handle a variety of backend and frontend errors
  • Manage user input and show data based on their search requests
  • Show changing data in a RecyclerView

…and more.

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We start with the absolute basics and go through everything step-by-step – so even if you have zero experience in programming, you’ll be able to easily follow along.

More experienced? Whether you’re wanting to brush up, expand your skills, or learn a new technology, our courses are structured in a way that makes it easy to skip ahead to the lessons that are relevant and interesting to you.

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Course Requirements
Introduction
Creating a New Project
Creating the Basic UI Layout
Creating a Placeholder TextView
Styling and Setting the Toolbar
Adding a SearchView to the Toolbar
Accessing the SearchView from the ForecastActivity
Implementing the SearchView with a Placeholder
Collapsing the SearchView After a Search
Registering for a Free Weather Data API
Understanding the JSON Response
Adding the GSON Library
Using the JSON to Kotlin Data Class Plugin
Modifying the Generated Data Classes
Understanding the Retrofit Library
Adding Retrofit
Setting up OpenWeatherApiService
Initializing Retrofit
Adding getFutureWeather Function
Using Kotlin Coroutines
API Key via a Request Interceptor
Displaying Data from the API
Adding the INTERNET Permission
Handling No Internet Connection
Making Application Context Available Globally
Creating a ConnectivityInterceptor
Testing the App Without the Internet
Why Not All Code is Inside an Activity
Adding ViewModel Dependencies
Creating a ForecastViewModel
Understanding LiveData
Adding LiveData to the ForecastViewModel
Accessing the ViewModel from ForecastActivity
Observing LiveData and Populating the UI
Handling the NoConnectivityException
Error Messages in the Activity
Showing and Hiding the Error Message
Adding a Loading Indicator
Showing a Loading Indicator while Waiting
Handling Incorrect City Name Exceptions
Adding a RecyclerView
Layout for Displaying ForecastEntries
Writing an Adapter for the RecyclerView
Implementing the ForecastRecyclerAdapter
Implementing the ViewHolder
Showing the RecyclerView
Using Glide to Display Weather Icons
Working with XML
Adding TikXml Dependency
Setting up XML Response Data Classes
Converting XML to Kotlin Data Classes – Part 1
Converting XML to Kotlin Data Classes – Part 2
Switching OpenWeatherApiService for XML API
Converting XML Kotlin Classes to JSON
Conclusion
Full Source Code – RESTful APIs for Android

Basic knowledge of Android, Kotlin, and object-oriented programming.

Tools and Frameworks

Kotlin, Android SDK 4.4, OpenWeatherMap

Why should I learn programming?

We’re living in the age of technology. In every industry, demand for developers is high and continues to rise, yet there’s a shortage of skilled developers. As a result, there’s a huge number of exciting opportunities out there for developers who want to take them.

By mastering the skills taught in these courses, you’ll prepare yourself for roles in a wide range of industries. Whether you want to work in a startup or a Fortune 500 company, you’ll learn in-demand knowledge and techniques that will help you to succeed.

What will I achieve by taking these courses?

You’ll not only learn the most in-demand modern languages, frameworks, and tools, but also how to apply them to your own projects and real-world situations.

Additionally, as our courses are primarily project-based, as you learn you’ll develop a rock-solid professional portfolio that can be used to impress potential employers.

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I’m an absolute beginner who’s never coded before. Can I still do these courses?

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Additionally, if you need a little extra help, we have expert mentors on hand to answer any course-related questions that you might have.

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While we recommend that you put in at least a few hours a week (the more hours put in, the more you’ll get out!) there are no time limits or deadlines that you need to worry about.

Will these courses help me to change my career?

Many of our students have been able to successfully change their careers, land their dream job, get promoted, and even start their own businesses… and you have the potential to do the same!

You can also combine your existing skills with your new tech skills, and expand your career, rather than changing it completely.

Our courses have been designed to teach you highly transferable skills, and leave you with strong projects that can be added to your professional portfolio – whatever you want to do, we’ll help to get you there! 🙂

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