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From Beginner to Advanced: Android App Development with Kotlin in 2023

Learn Kotlin and master Android app development from A to Z. Gain hands-on experience with Firebase, Android Studio, and build real-world Android projects.

Created by:- Oak Academy, OAK Academy Team and Mehmet ÖNGEL

What you’ll learn

  • Kotlin Programming: Learn the Kotlin programming language for developing Android apps.
  • Android App Development: Gain a comprehensive understanding of developing apps for the Android platform.
  • Firebase Integration: Explore the integration of Firebase, a Google-backed application development platform, into Android apps using Kotlin and Android Studio.
  • Android Studio: Familiarize yourself with Android Studio, the primary integrated development environment (IDE) for Android app development.
  • Real-World Projects: Build practical Android projects to apply your knowledge and skills in a real-world context.
  • Git and Version Control: Learn the basics of Git, a modern version control system, to effectively manage changes to your app’s source code over time.
  • Collaboration with GitHub: Understand how to collaborate on GitHub, a web-based platform for version control and team collaboration, to contribute to projects and work with others.
  • Android Jetpack: Discover a comprehensive assortment of libraries, tools, and architectural guidance provided by Google to streamline the process of developing Android applications.
  • App Deployment: Learn the process of publishing and deploying your Android apps on the Google Play Store.
  • Room Database: Understand the concepts and implementation of the Room Database, an architectural component for data persistence in Android apps.
  • Firebase Products: Discover the various products and services offered by Firebase, including the Realtime Database, Authentication, Cloud Storage, and more.
  • Push Notifications: Implement push notifications in your Android apps using Firebase to engage with users and deliver timely updates.
  • Git Workflow: Learn the key concepts and workflow of Git, including creating branches, resolving conflicts, undoing changes, and collaborating with others on GitHub.
  • Comprehensive Learning: This course is designed to provide a thorough and beginner-friendly introduction to Android app development, Kotlin programming, Firebase integration, and Git version control.

By covering these topics, this course aims to equip you with the necessary skills and knowledge to develop professional Android apps using Kotlin, Firebase, and Git.

Android app development

Course content

  • Introduction to Kotlin Programming for Android Developers
  • Environment Setup in Android Studio with Kotlin
  • Kotlin Fundamentals: Operators, Control Flow Statements, Loops
  • Functions in Android Kotlin
  • Object-Oriented Programming (OOP) with Kotlin
  • Introduction to Android App Development
  • Android Components Overview
  • User Interactions in Android App Development
  • Lists & Views in Android App Development
  • Intent and Lifecycles in Android App Development
  • SharedPreferences and Data Storage in Android App Development
  • Device Compatibility in Android 12 App Development
  • Project Development: Creating an Android App
  • Publishing Your App on Google Play
  • Fragment Operations in Android App Development with Kotlin
  • Data communication between screens in mobile app development.
  • Accessing Android Device Features in App Development with Kotlin
  • Notification Implementation in Android App Development
  • Utilizing the architectural Room database in Android app development with Kotlin.
  • Introduction to Firebase and its Realtime Database
  • User Registration App using Firebase and Kotlin
  • Authentication with Firebase in Android App Development
  • Push Notification Integration with Firebase
  • Cloud Storage with Firebase
  • Working with REST API using Retrofit Library
  • Building a Quiz Game Project
  • Introduction to Git and GitHub
  • Tips and Tricks for Android App Development
  • Extra Topics or Bonus Content


  • No prior knowledge of Android Kotlin is necessary.
  • No prior knowledge of Kotlin coding is required.
  • Complete the course videos in their entirety, following the given order.
  • Show determination to learn and have patience when learning Kotlin.
  • Have a desire to learn Firebase for Android App Development using Kotlin and Flutter programming language.
  • Have an interest in learning Git and Github.
  • No previous knowledge is required for Android Development.
  • No prior experience in Android coding is needed.
  • It is preferable to have a Windows OS (64-bit), but other operating systems can also be used.
  • Have a working computer with a minimum of 8 GB RAM and an internet connection.
  • Show a strong desire to learn Android Application Development.
  • Nothing else is required. All you need is your computer and the ambition to start today.
  • Watch the Android course videos in their entirety, following the given order.


Hello! We are excited to welcome you to the Android App Development with Kotlin course, where you’ll learn from beginner to advanced levels.

In this course, you will learn all about Android app development using Kotlin programming language. We will cover a wide range of topics including Android Studio, object-oriented programming, Firebase integration, and various Android app development projects.

By the end of the course, you will have the skills and knowledge to create your own Android apps using Kotlin. Prepare yourself for an immersive journey into the thrilling realm of Android development!

Kotlin, a popular programming language for Android and Java developers, is essential for building Android apps. Oak Academy offers a highly-rated course to learn Kotlin, from beginner to advanced level, recognizing its significance in Android development.

Kotlin is a modern, statically-typed language used to develop for Android devices and the Java Virtual Machine. It combines object-oriented and functional programming paradigms and can be compiled to JavaScript.

To stay ahead in Android development, it’s crucial to continuously learn about the platform. The Udemy course on Android development provides hands-on lectures on Android operating systems and keeps you updated with the ever-evolving Android platform.

Firebase, developed by Google, is a powerful platform for creating mobile and web applications. Originally an independent company, it was acquired by Google and has become their flagship offering for app development.

With the widespread use of Android tablets and phones, developing apps for this operating system offers access to a large user base. Whether you’re pursuing a career in mobile app development or creating your own apps or games, Oak Academy’s instructors can help you with their Android development course.

Android, being a dominant mobile operating system, is in high demand for games, business apps, and various other mobile products. The industry requires more Android developers, making this Android development course an ideal starting point or a way to enhance existing skills in the field.

Firebase, backed by Google, is a development software that empowers developers to create iOS, Android, and web apps. It offers tools for analytics tracking, crash reporting, and conducting marketing and product experiments.

By granting secure access to the database directly from client-side code, the Firebase Realtime Database empowers the creation of collaborative applications.

Git is a modern version control system that allows software developers to manage changes to source code over time. With its distributed architecture, each team member has a working copy of the code.

Android is a highly popular platform among developers and holds a dominant position in the global smartphone market. As businesses increasingly develop mobile apps for customer engagement, Android development skills remain in high demand.

If you want to enhance your career prospects by learning Android, start from scratch, become an Android Studio master, or build your first app, you’ve come to the right place.

This comprehensive Android app development course adopts a focused approach on using the Android SDK to create visually appealing applications for smartphones. It covers all aspects of Android application development, making it a complete guide for learners.

With the Android platform’s increasing popularity and dominance in the global smartphone market, Android development skills are highly sought after, as businesses continue to develop mobile apps for customer engagement.

Kotlin, a statically-typed, general-purpose programming language, is extensively used for developing applications targeting the Java Virtual Machine and Android devices. It combines elements of object-oriented and functional programming paradigms and can also be compiled into JavaScript source code.

Android development involves creating software applications, commonly referred to as apps, that are compatible with devices running the Android operating system. The availability of the open-source Android project allows developers to easily access the Android software development kit (SDK). Utilizing programming languages such as Kotlin, Java, and C++, developers leverage the Android SDK tools to compile their code, data, and resource files into an APK (Android package) – an archive file with a .apk extension. The APK contains all the necessary app contents for installation on Android devices. Upon completion, Android developers can upload their apps to the Google Play Store, enabling users to download and enjoy them, including those designed for android game development.

Object-oriented programming (OOP) is a programming paradigm that organizes software development around objects, which are instances of classes that represent real-world entities. By encapsulating data and behavior within classes, OOP promotes modular and reusable code, making it easier to manage and maintain complex applications. In the context of a point of sale system, OOP allows for the creation of classes such as Product, Customer, Dealer, and Order, each responsible for specific functionality and data management, and interacting with each other to fulfill the system’s requirements.

Android, as a mobile operating system developed by Google, is built upon the Linux kernel. The Linux kernel serves as the underlying layer that interfaces with the hardware components of devices, managing essential functions such as memory allocation, CPU utilization, and device drivers. By leveraging the Linux kernel, Android benefits from its stability, security, and versatility. Additionally, the use of the Linux kernel allows Android to be highly customizable, enabling device manufacturers to tailor the OS to their specific hardware and software needs. This flexibility has contributed to Android’s widespread adoption and its ability to cater to a diverse range of devices, including smartphones, tablets, smartwatches, and TVs.

Imagine the chaos that could ensue if one application could freely access and manipulate data from other applications without any restrictions. To ensure security and prevent malicious interactions, the Android operating system requires developers to set permissions that users must grant for specific actions. For instance, an app seeking access to the phone’s file system would need explicit permission from the user. This permission model empowers users to control app access to sensitive data and safeguards against malware and viruses.

This comprehensive course on Android app development with Kotlin is specifically designed for beginners who want to learn how to create applications using Android Studio. It covers various aspects of Android application development and design, providing hands-on experience and practical examples. From basic concepts to advanced techniques, you’ll gain a thorough understanding of Android app development, and the course includes more than 10 practical examples and guides you in building and publishing two major apps.

What is Android Development?

Android development is the process of creating software applications, known as apps, that are compatible with devices running the Android operating system. Developers have access to the Android software development kit (SDK), which allows them to create apps using programming languages like Kotlin, Java, and C++. The Android SDK tools compile the code, data, and resource files into an APK (Android package) file, which contains all the necessary content for installing the app on Android devices. Developers can then upload their apps to the Google Play Store for users to download.

There are some important tools for Android Development?

Important tools for Android development include programming languages like Java, Kotlin, and C++ for native app development. Additionally, frameworks like Flutter or React Native allow developers to create apps for multiple platforms simultaneously. For Flutter development, knowledge of the Dart programming language is required, while React Native development typically involves JavaScript programming knowledge. The choice of tools depends on the specific focus and requirements of the Android development project or career path.

Android development can be a rewarding and promising career choice. With a large user base and the continuous growth of the Android platform, there are ample opportunities for Android developers. The demand for skilled Android developers is high, and organizations across various industries are actively seeking professionals with Android development expertise.

Is Android Development a good career?

When it comes to choosing between Kotlin and Java for Android development, Kotlin has gained significant popularity and is now the recommended language for Android. It offers modern features, concise syntax, and enhanced safety features compared to Java. Learning Kotlin can be advantageous, especially for new programmers, as it allows them to focus on learning core programming concepts without sacrificing safety and efficiency.

Is Kotlin or Java better for Android Development?

However, it’s important to note that Java is still widely used in the industry, particularly in organizations that already have existing Android apps written in Java. In such cases, having Java skills can be beneficial. It’s advisable to check job requirements and preferences to determine whether Java or Kotlin is more relevant for a specific position.

Overall, both Kotlin and Java have their merits, and having proficiency in both languages can broaden your career prospects in Android development. Continuously updating your skills and staying informed about industry trends can help you stay competitive in the ever-evolving field of Android development.

To be an Android developer, you will need a combination of technical skills and knowledge. Some key skills which is required to get this course is:

  1. Programming Languages: Proficiency in Java and/or Kotlin is essential for Android development. Familiarity with C++ can also be beneficial for certain scenarios.
  2. Android SDK: A solid understanding of the Android Software Development Kit (SDK) is crucial. This includes knowledge of different components, APIs, and libraries provided by the SDK.
  3. SQL and Database Management: Understanding the basics of SQL (Structured Query Language) is important for working with databases in Android apps.
  4. XML: XML (eXtensible Markup Language) is used for designing layouts and managing UI elements in Android apps. Familiarity with XML is necessary for creating and manipulating UI components.
  5. User Interface (UI) and User Experience (UX): Knowledge of UI design principles, UX best practices, and Material Design guidelines will help you create visually appealing and user-friendly Android apps.
  6. Back-end and Front-end Development: Android developers should have a good understanding of both back-end and front-end development concepts. This includes handling data, integrating APIs, managing network requests, and building responsive UIs.
  7. Version Control: Proficiency in using version control systems like Git will allow you to effectively manage code changes and collaborate with other developers.
  8. Problem-Solving and Debugging: Strong problem-solving skills and the ability to debug and fix issues in code are essential for efficient Android app development.
  9. Project Management: Familiarity with project management methodologies, such as Agile, can help you work effectively in teams and deliver projects on time.
  10. Continuous Learning: Android development is a dynamic field, and staying updated with the latest trends, tools, and libraries is crucial for career growth. Being open to learning new technologies and adapting to changes is important.

What does it mean that Python is object-oriented?

In Python, being object-oriented means that the language provides features and syntax to create and work with objects. Objects are instances of classes, which serve as blueprints or templates for creating objects with their own set of attributes (data) and methods (functions). By using classes, Python allows developers to model real-world entities and concepts in their code, encapsulating data and behavior within objects. This approach promotes code organization, reusability, and modularity, making it easier to manage and maintain complex programs. Python’s object-oriented capabilities enable developers to write code that is efficient, structured, and easily extendable.

What is Firebase and how it works?

The Firebase Realtime Database is a powerful tool for building collaborative applications in Android. It enables secure access to the database directly from client-side code, allowing data to be stored and synchronized in real-time. Even when offline, data is persisted locally and real-time events continue to function, providing a seamless and responsive user experience.

What is Firebase used for in Android?

Firebase is a comprehensive mobile platform designed to facilitate the rapid development of high-quality apps while enabling user growth and revenue generation. It offers a range of complementary features that can be customized and combined according to your specific requirements. At the core of Firebase is Google Analytics for Firebase, providing powerful analytics capabilities to gain insights into user behavior and optimize app performance.

Is Firebase a server or database?

The Firebase Realtime Database is a cloud-based NoSQL database that allows you to store and synchronize data in real-time among your users. Additionally, Cloud Firestore provides the ability to store, sync, and query app data on a global scale. These Firebase services offer powerful data management solutions for building responsive and collaborative applications.

How data is stored in Firebase?

In Firebase, data is stored in a JSON format, allowing for easy organization and synchronization across multiple clients in real-time. It provides a scalable and flexible solution for storing and accessing data in a cloud-hosted NoSQL database.

When should I use Firebase?

Firebase is a suitable choice when you need a quick and easy development process, minimal integration with legacy systems or third-party services, and when your application doesn’t require extensive data processing or complex user authentication. It offers simplicity and convenience for rapid application development.

What’s important

This course is designed to cater to individuals of all levels, including beginners seeking to learn from scratch and professionals in need of a refresher.

In this course, you will learn about various topics including:

  • Android environment setup, including software installation and configuration
  • Creating a new project in Android Studio
  • Understanding Android components and their lifecycles
  • Publishing your app on Google Play
  • Introduction to Kotlin and its programming fundamentals
  • Working with variables, data types, and arrays in Kotlin for Android
  • Using operators and control flow statements in Android app development with Kotlin
  • Implementing loops and functions in Android Studio using Kotlin
  • Exploring concepts of object-oriented programming, such as classes, objects, constructors, encapsulation, and inheritance
  • Android app development with the latest Android versions, such as Android 11 and Android 12
  • Utilizing Android Studio and Android Jetpack for efficient app development
  • Incorporating Java and Kotlin in Android development

These topics cover a comprehensive range of skills and knowledge required for Android app development using both Kotlin and Java programming languages.

Taking this course can be beneficial for several reasons:

  1. Comprehensive Learning: The course covers a wide range of topics related to Android app development, starting from the basics and progressing to advanced concepts. It provides a holistic understanding of the Android development process.
  2. Quality Teaching: OAK Academy is an established online education company known for its expertise in IT, software, and development fields. The course is taught by seasoned developers who have industry experience, ensuring high-quality instruction.
  3. Multi-Language Support: The course is available in various languages, including Turkish, English, Portuguese, and Spanish, making it accessible to learners from different linguistic backgrounds.
  4. Up-to-date Content: OAK Academy continually updates its courses to incorporate the latest advancements and trends in Android development. By enrolling in the course, you can stay informed about new techniques, tools, and frameworks.
  5. Access to Extensive Resources: The course on the Udemy platform provides over 1000 hours of video lessons, giving you ample material to learn from. The resources provided can enhance your understanding and provide practical insights.

By taking this course, you can benefit from the expertise of OAK Academy’s instructors, gain a solid foundation in Android development, and stay up-to-date with the latest industry practices. Whether you are a beginner or a professional seeking to refresh your knowledge, this course can help you advance your skills in Android app development.

Fresh Content

This course provides fresh and up-to-date content that keeps pace with the rapidly advancing field of Android development. It ensures that learners are equipped with the latest knowledge, tools, and industry best practices. By enrolling in this course, you can stay current with the latest trends and advancements in Android development, giving you a competitive edge in the industry.

Video and Audio Production Quality

  • High-quality video and audio production
  • Clear visuals for a better understanding
  • Crisp and clear audio for easy comprehension
  • Minimized distractions for a seamless learning experience

You’ll also get:

  • Lifetime access to the course materials, allowing you to revisit the content at any time.
  • Access to a supportive and responsive Q&A section where you can ask questions and receive fast and friendly support from the course instructors or community members.
  • Get started immediately and dive into the course
  • Receive full support and have all your questions answered
  • Join the “Android App Development with Kotlin | Beginner to Advanced” course and enhance your skills in Android app development

You can also check this link for more course like this: 2023 Android 12 & Kotlin Development Masterclass: The Ultimate Guide

This course is suitable for

  • Ideal for individuals planning a job transformation and aspiring to become a Kotlin developer
  • Suitable for those who want to learn the important subjects of Kotlin Android development
  • Perfect for individuals who aspire to become computer programmers specializing in Android Kotlin
  • Designed for those who want to develop Android mobile applications using Kotlin
  • Beneficial for individuals looking to improve their existing knowledge of Android App Development with Kotlin
  • Beginner-friendly course for those with a curious mind and a desire to become app developers
  • Suitable for anyone who wants to learn Android coding and become an Android Developer
  • Recommended for programmers interested in building Android apps using Kotlin
  • Geared towards individuals who want to create Android applications using the Kotlin programming language
  • No previous Android Development coding experience required, making it accessible for beginners who want to become experts
  • Suitable for individuals seeking the flexibility to work from anywhere in the world
  • Up-to-date course covering the latest advancements in Android development
  • Perfect for individuals planning a job transformation and aspiring to become Android developers
  • Tailored for those who want to develop Android mobile applications using Firebase
  • Suitable for individuals interested in learning Git and GitHub for version control

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Frequently Asked Questions (FAQs)

  1. Do I need a specific operating system for this course?

A: It is preferable to have a Windows OS (64-bit), but other operating systems can also be used.

  1. What are the system requirements for this course?

A: You need a working computer with a minimum of 8 GB RAM and an internet connection.

  1. Is there any specific software or tool required for this course?

A: Android Studio is the primary integrated development environment (IDE) used for Android app development.

  1. Can I build real-world projects during this course?

A: Yes, the course includes real-world project development to apply your knowledge and skills in a practical context.

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