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hello and welcome to fundamentals of
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multiplatform frontend development
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module in today's digital age the demand
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for applications that operate smoothly
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across desktops tablets and smartphones
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regardless of the operating system is a
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skyrocketing whether it is iOS Android
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or web platforms users expect a
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consistent
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experience multiplatform development
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offers significant advantages code
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reusability faster development Cycles
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reduce maintenance cost and ability to
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reach a broader
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audience this approach ensures your
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application can meet users needs on any
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device one powerful tool that
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facilitates this process is flutter flow
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flutter flow is a visual application
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development platform that empowers
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developers to create multip platform
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applications efficiently even with
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limited coding experience you are
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onboarded unlike traditional development
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methods that require separate code bases
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for different platforms flutter flow
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allows you for a unified code base
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simplifying the development process and
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enhancing
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productivity we crafted this module to
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help you understand multiplatform app
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development Concepts the terminologies
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and Concepts you learn here provide a
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high level overview of the core
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development principles you will need as
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you progress through this course and
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start building flutter flow we will dive
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into more specific details in later
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modules we will start from Key concept
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and architecture then we move to State
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Management and we learn what state means
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and what is a state management M so
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we're going to move to API ingestion and
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modeling so that you will understand the
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core concept behind them and also we
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will review data
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persistency we will also review
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authentication and authorization and
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when to use
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which then we will go through the
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concept of collaboration and analytics
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and followed by debugging and testing
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your
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applications and at the end of this
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module we're going to go through the
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build what it means distribute what does
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it mean and how it works and also
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release management let's get it
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started in traditional app development
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developers often maintain multiple code
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bases for platform like iOS Android and
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web this approach can be timec consuming
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and prone to
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inconsistencies modern multiplatform
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development Frameworks such as flutter
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which is what flutter flow uses under
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the hood help to build and target
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multi-platforms with a single codebase
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that run seamlessly on iOS Android and
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the web this will simplify the
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development process and ensuring
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consistency one of the foundational
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principle in app development is the
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client service model which is especially
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important in Mobile development this
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architecture separates the client the
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device you use to access the app like
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your phone your tablet and browser from
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the backend that runs the server which
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is a computer that handles data and
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manages resources the client handles the
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apps user interfaces and interactions
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this means your device manages
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everything you see and touch on your
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screen meanwhile the backend on the
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server processes your request manages
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data keep things running smoothly and
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sends back a respond to the client to
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communicate your device needs an
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internet connection whether you send a
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message check the weather or stream a
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video your device sends a request over
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the Internet to the server which
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processes it and send the necessary
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inform information back to your
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device let's take a look at the real
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example an online store is a real
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example of the client server model the
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clients your browser or mobile app
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displays product listings and allows you
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to place orders the server handles
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product details Inventory management
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payment processing order status updates
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and more
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now let's talk about
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responsiveness responsiveness is
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critical to a great user experience
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especially in multiplatform development
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a responsive design adapts to various
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screen sizes and
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orientations ensuring your app looks
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great and functions well on any
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device and now let's talk about
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component driven development component
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driven development involves breaking
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down the UI into you reusable
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components each component encapsulates a
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specific functionality making your code
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more modular and easier to maintain
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reusability and maintainability are
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critical for long-term project successes
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creating reusable components and
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maintaining a clean code base can save
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time and reduce the risk of box you will
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learn more about this in the upcoming
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modules
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stat refers to the data determining what
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is displayed on the user
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interface when the state changes the UI
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updates to reflect these changes this
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ensures that your app responds smoothly
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to user actions and data updates
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providing an engaging
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experience a typical application has two
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types of
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States Lo local state and app
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States local state refers to data manage
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within a specific components or vget
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meaning changes to this state only
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affect the viget
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itself app estate often called Global
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Estates refers to data shared across the
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entire application changes to the app
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estate can impact multiple pages and
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components or vets that relay on these
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shared data let's consider an e-commerce
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app
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example an example of a local estate is
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the quantity selector for a product the
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quantities State current value is
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managed within the quantity component in
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the product detail component or
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page the App State in our e-commerce app
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might be the user authentication
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status once a user logs in
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this information is shared across
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various app Parts such as the nav bar
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showing the user profile access to the
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user specific settings and their
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shopping
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carts these states often in trct for
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example adding a product to the card
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updates the local state of the quantity
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selector and the app state of the card
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contents and may trigger a server State
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update to persist this change
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State Management refers to how an
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application handles these states
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ensuring that changes in data are
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efficiently and accurately reflected in
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the user interface flutter flow helps
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you find the best balance between
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keeping your estate clean and managed
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you will learn more about Estate
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Management in the flutter flow in the
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upcoming
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modules in the client server model a
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request usually goes to server and a
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respond is sent back to the client in
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other words the front end of an
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application needs to fetch data from the
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back end apis are commonly used to
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achieve this apis serve many purposes
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but their primary function is to fetch
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data from external sources and integrate
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various Services into your
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application they Bridge your application
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and external data sources by sending
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requests and receiving
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responses there are different types of
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API requests let's start with the most
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common ones get request fetch data post
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request send new data put request update
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existing data and delete request remove
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data understanding these request is
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essential for interacting with apis
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effectively when a server defines these
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operations and adheres to principles it
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is known as a restful API apis return
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data in different formats but the
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typical format is Json let's take a look
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at Json Json is a lightweight data
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interchangeable format that's easy for
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human to read and write and for machines
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to parse and generate here is an example
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of fetching data from an API using a get
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request this code snippet demonstrates
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how to send a request and handle the
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response in your
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application once you've fetched the data
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the next step is to model it within your
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application data modeling involves
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mapping the Json respond to structure
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objects that your application can use
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more
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easily let's look at a practical example
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of an e-commerce app in flutter flow the
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app sends a get request to fetch product
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data the API responds with ajon object
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containing product details then mapped
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to a product model within the app this
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model is used to display product
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information on the user
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interface handling errors and validating
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in data when working with apis are also
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Essentials this ensures your app can
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handle issues like Network failure or
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invalid data formats gracefully let's
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now move on to the next video to see how
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we can puras data in an
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application data persistent refers to
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the techniques used to retain user data
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across sessions ensuring app continuity
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and enhancing user experience
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imagine an e-commerce app that remembers
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your preferred payment method keeps
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track of the item in your wish list and
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stores your order history data
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persistent ensures that these
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preferences and data are not lost when
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app is closed and the device is
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restarted several data storage
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techniques exist in applications each
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method has its use cases and benefits
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local storage stores small amounts of
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data such as user preferences or Simple
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app States for example your preferred
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theme mode can be stored locally for
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quick
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access a database is often used for
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complex data storage needs such as user
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data or app content in an e-commerce app
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databases can manage large volume of a
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structured data such as a product
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details user accounts and transaction
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histories file storage helps store
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larger files such as images videos or
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documents in an e-commerce app this
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could include product images user
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uploaded content or digital
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invoices all right now that we learned
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about databases let's learn about one of
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the most important topics in
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multiplatform development authentication
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and authorization in the next
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video authentication and authorization
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two fundamental cores of building secure
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applications authentication is the
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process of verifying a user's identity
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which is vital for protecting user data
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and maintaining the security of your
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application it ensures that user
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information is safeguarded and only
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accessible by the rightful owner there
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are several standard authentication
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method Anonymous authentication allows
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user to interact with your application
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without permanent credentials by
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creating temporary Anonymous accounts
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this benefits user who want to test
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Services before committing to an account
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if a user decides to sign up later their
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Anonymous account can be upgraded to a
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regular account preserving their data
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and
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interactions Anonymous sessions are
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isolated with strict permissions to
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prevent sensitive features or data
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access when upgrading to a full account
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secure practices link the anonymous data
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to the new profile ensuring no data
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leakage or unauthorized
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access the email login method involves
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user registering with an email address
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and password securing in this approach
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is enhanced through email verification
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where a link or code is sent to the
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user's email to confirm ownership I bet
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you have seen that
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already this step prevents unauthorized
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account creation and ensures that the
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user can recover their account and
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receive important Communications
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another method is phone authentication
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where a user phone's number is used for
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identity verification upon registration
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or locking in the user receives a text
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message with a verification code that
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must be entered to
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proceed this method leverages the
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security of mobile networks and the
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uniqueness of phone numbers to ensure
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that the person attempting access say is
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the accounts legitimate
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owner oos is a popular Authentication
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Protocol that enables user to authorize
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one application to interact with another
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on their behalf without revealing their
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password this method is commonly used to
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allow applications to access service
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features or user information from other
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services such as logging into a
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thirdparty app using Google or Facebook
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credentials using ooth the users login
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credentials stay secure with the
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original service provider and only a
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specific permissions are granted to the
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third party apps via access
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tokens this approach minimizes the risk
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of exposing sensitive user data and
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streamlines the login process across
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various
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platforms API I key authentication is
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commonly used for server to server
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interactions an API key is an unique
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identifier that provides secure access
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to the API
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endpoints while authentication verifies
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a user's identity authorization
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determines what an authenticated user
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can do it's about controlling access to
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resources based on user roles and
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permissions
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role base access control or
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rbac assigns permissions based on user
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roles for example an admin might have
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full access to all features while a
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regular user has limited access and a
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guest has even fewer
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permission in an e-commerce app
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authentication ensures that users can
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securely log in while authorization
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controls what they can do once login
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customers can brow and purchase products
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sellers can manage their listings and
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admins can oversee the platform all
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right the next video is about branching
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and how it can use to manage codes and
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track changes in an application let's
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get into
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it effective collaboration in
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multiplatform development ensures that a
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part of the app and code is well
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organized and that team members can work
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together
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efficiently key features of this
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collaboration includes Version Control
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branching and merging and conflict
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resolution these features help manage
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changes from multiple contributors and
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keep the application development flow
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consistent but let me explain what each
00:18:25
of them
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means version scoll allows you to track
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the history of changes revert to the
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previous version and manage concurrent
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Updates this is essential for
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maintaining a reliable and stable
00:18:41
application development flow especially
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when multiple developers work on the
00:18:45
same project branching allows developers
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to work on new features or B fixes
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without affecting the main code base
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which is the source of TRS
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think of the main application track or
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codebase as your application's central
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flow when you create a branch you copy
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the main flow to work on a new feature
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or fix an issue this means you can
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develop independently without disturbing
00:19:17
the main code for example in an
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e-commerce application suppose your team
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is adding a new wish list feature you
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create a branch from the main code base
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or application to work on this
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feature while you work on the V list in
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this Branch other developers can
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continue improving the check out process
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or integrating a new payment gway in
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their
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branches once the wish list feature is
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complete and tested you can merge this
00:19:52
Branch into the main code base
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seamlessly integrating the new
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functionality without disturbing the
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ongoing work on the other
00:20:03
features aerg conflict occurs when
00:20:08
multiple team members make changes to
00:20:11
same part of the project such as
00:20:13
simultaneously modifying the same screen
00:20:16
vget or configuration for example
00:20:19
imagine two
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developers Alise and Bob working on same
00:20:25
flutter flow project and both decide to
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update the same button
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widget her updates will be integrated
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without issues when Al's changes are
00:20:38
merged into the main
00:20:40
project however when Bob tries to merge
00:20:44
these changes afterward a merg conflict
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will occur because Alise has already
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modified the button text and color you
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can use tools to help you identify the
00:20:55
conflicts resolve them and ensures that
00:20:58
at new changes can be merged you will
00:21:01
learn about this in flutter flow in the
00:21:03
upcoming
00:21:05
modules collaboration also involves
00:21:07
Change review where team members review
00:21:10
each other's changes this caus changes
00:21:13
and ensures quality before merging
00:21:16
contributions this process helps catch
00:21:19
errors improve quality and share
00:21:21
knowledge among team members leading to
00:21:23
a robust and reliable application let's
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now go to the next video where we will
00:21:29
discuss analytics and its role in
00:21:32
application
00:21:34
development analytics involves
00:21:36
collecting and analyzing data to
00:21:39
understand user behavior and improve
00:21:41
applications
00:21:42
performance it is essential for making
00:21:46
improved decision and enhancing user
00:21:48
experience there are several types of
00:21:51
analytics user Behavior
00:21:54
analytics track how user interact with
00:21:57
your application
00:21:59
performance analytics monitors app speed
00:22:02
and responsiveness and crash analytics
00:22:05
help identify and fix
00:22:08
errors popular tools for implementing
00:22:11
analytics include Google analytics for
00:22:14
tracking user behavior and Firebase for
00:22:17
Real Time data and crash
00:22:22
reporting a key aspect of analytics is
00:22:25
understanding and optimizing product
00:22:27
conversion fun funnels this funnel
00:22:30
tracks users stages from discovering
00:22:34
your product to purchasing the stages
00:22:37
typically include awareness interest
00:22:41
decision and
00:22:43
actions some small changes in your app
00:22:46
such as improving call to action button
00:22:50
or simplifying the checkout process can
00:22:53
significantly improve or impact
00:22:56
conversion rates and analytics help
00:22:59
identifying where users drop off in the
00:23:03
funnel allowing you to make data deriven
00:23:07
optimization in an e-commerce app you
00:23:10
can use analytics to track how user move
00:23:13
through the product conversions funnel
00:23:16
you can identify button necks and
00:23:19
Implement targeted improvements to boost
00:23:22
conversions rate by analyzing user
00:23:25
Behavior at each stage let's go to the
00:23:29
next video for another important topic
00:23:32
which is
00:23:34
debugging debugging is identifying
00:23:37
analyzing and fixing bugs or issues in
00:23:40
your application it is a critical part
00:23:43
of development life cycle to ensure a
00:23:46
smooth user experience debugging is
00:23:49
important because it takes up
00:23:51
significant development time being
00:23:54
efficient and effective in debugging can
00:23:56
significantly enhance productivity and
00:23:59
ensure a stable
00:24:02
application adopting a systematic
00:24:05
approach to debugging is essential this
00:24:07
involves isolating a BG understanding
00:24:10
code flow and state applying a fix and
00:24:14
testing the solution to ensure the
00:24:16
issues is resolved firstly isolate the
00:24:20
bug by identifying where and when it
00:24:23
occurs secondly learn the code flow and
00:24:26
state to understand the bugs causes then
00:24:29
fix the BG by making Necessary code
00:24:32
changes finally test the solution to
00:24:35
confirm that issue is
00:24:38
resolved while debugging is very
00:24:41
important testing is another important
00:24:44
subject which we will talk about it in
00:24:46
the next
00:24:47
video testing is an essential step in
00:24:50
the software development life cycle it
00:24:53
ensures that your application functions
00:24:56
correctly is B free provides a smooth
00:24:59
user experience and is generally
00:25:01
maintained over
00:25:03
time several types of testing should be
00:25:06
incorporated into your development
00:25:09
process unit testing which tests
00:25:12
individual components integration
00:25:14
testing which checks if components work
00:25:17
together and endtoend testing which
00:25:20
validates the entire user Journey both
00:25:23
automated and manual testing are
00:25:25
important in the modern front end
00:25:28
development Vel M process automated
00:25:30
testing uses scripts and tools to
00:25:33
perform test quickly and repeatedly
00:25:36
while manual testings involve human
00:25:40
testers exploring the app flutter flow
00:25:43
makes it easy to create automated
00:25:45
testing you will learn more about this
00:25:48
in the testing
00:25:50
module automating the build process is
00:25:53
crucial for ensuring multiplatform
00:25:55
compatibility but first let's see what
00:25:58
what build means building an application
00:26:02
means converting source code into a
00:26:04
format that can be installed and run on
00:26:07
a device or in a browser each platform
00:26:11
requires a set of requirements and a
00:26:14
tool chain to perform the build and
00:26:17
create an installable or runnable app
00:26:20
for multiplatform development this
00:26:22
process creates distinct versions of
00:26:26
your app for iOS and Android and web
00:26:30
platforms once built your app needs to
00:26:34
be distributed to reach users this
00:26:37
involves deploying your app through
00:26:41
various channels such as the Apple app
00:26:45
store Google Play Store Enterprise
00:26:48
deployments and web-based
00:26:51
distributions each platform has its
00:26:54
submission guidelines and requirements
00:26:57
adhering to a specific guidelines and
00:26:59
policies is crucial for navigating Apple
00:27:02
Store approvals preparing detailed
00:27:05
documentation and complying with
00:27:08
platform requirements are key to
00:27:09
expecting the approval process from the
00:27:13
Apple Store Google Play and other stores
00:27:16
automating this build process ensures
00:27:18
compatibility across all platforms
00:27:21
continuous integration and continuous
00:27:24
deployment
00:27:25
cicd pipelines can facil itate building
00:27:29
and testing ensuring consistent and
00:27:31
efficient build across iOS Android and
00:27:34
web platforms luckily as a flutter flow
00:27:38
user the heavy lifting part of this
00:27:41
pipeline is managed for you versioning
00:27:44
is essential for managing updates and
00:27:47
maintaining
00:27:49
compatibility semantic versioning helps
00:27:52
communicate the nature of changes in
00:27:55
each release whether major updates minor
00:27:58
Improvement or patches and bik fixes
00:28:02
regular updates are important for
00:28:04
security performance and user
00:28:06
satisfaction not to say that you also
00:28:09
want to deploy latest and greatest app
00:28:13
for your user
