Mvvm (Model View ViewModel) s a software development pattern that enables separation of the UI from the logic of an application. This pattern is implemented using a combination of XML and Java. MVVM is an adaptation of the Model View Controller (MVC) attern.
The key features of MVVM are:
• Separation of the UI and the logic.
• Use of XML to describe the UI.
• Use of Java to implement the logic.
• Use of a ViewModel to manage the data and interactions between the UI and the logic.
MVVM is a popular pattern because it provides a way to modularize an application and make it easier to develop and maintain.
Before we start
Android is a mobile operating system based on the Linux kernel and designed primarily for handheld devices such as smartphones and tablets. It is developed by Google and used by manufacturers including Samsung, HTC, Motorola, and LG. Android’s software library is made up of various components which can be used to develop applications for the system. The system software can be upgraded to include new features and improvements, or new versions can be released with new features and improvements.
What Is Viewmodel MVVM Android
ViewModel is an important component of MVVM. It is responsible for binding the user interface to the application’s data and managing the changes that occur. It allows data to persist between configuration changes, and provides a lifecycle-conscious way to bind the user interface to the data.
Why MVVM Is Best for Android
MVVM is a design pattern that separates an app’s UI from its logic. This allows different teams to work on different parts of the app without worrying about how the other parts are working. MVVM also separates an app’s UI into three components: the Activity, Fragment, and XML views. The ViewModel classes are where you write your business logic. This ensures that the app’s UI and its logic are completely separate.
What Is MVVM and MVC in Android
MVVM stands for Model-View-ViewModel. It is a design pattern that separates the concerns of the model, the view, and the view model. The model is responsible for maintaining the data, while the view is responsible for presenting that data to the user. The view model is in charge of managing the data between the model and the view. This allows the view to be lightweight and easy to test.
What Is Livedata in MVVM Android
LiveData is a Lifecycle-Aware Observable
LiveData is an observable data holder class. LiveData is lifecycle-aware, meaning it respects the lifecycle of other app components, such as activities, fragments, or services. This awareness ensures LiveData only updates app component observers that are in an active lifecycle state.
LiveData is useful for keeping track of certain data that should not be updated during the normal course of an activity or fragment’s lifecycle. For example, if an activity or fragment needs to keep track of a user’s current score in a game, LiveData would be a better choice than a regular observable because the score would not be updated while the activity or fragment is in the background.
LiveData is also useful for monitoring the state of components that are not part of the main app. For example, a service might monitor the state of a network connection. In this case, the service would not be part of the main app, but it would still need to be updated when the network connection changes.
LiveData is not limited to lifecycle-sensitive data. Any data that should be updated only when certain conditions are met can be stored in a LiveData. For example, a LiveData could be used to keep track of the number of items in a list or the position of a piece on a chessboard.
What Is Difference Between MVP MVC MVVM in Android
MVC: The View functions independently and has no information about the controller. MVP: The View holds the presenter’s knowledge in this software architecture. MVVM: The view holds references to the ViewModel in this architecture. This allows the ViewModel to manage the presentation of the data to the user.
Why Do We Need a Viewmodel Android
Android Jetpack Architecture Component is a library that helps developers build better Android apps. It includes a ViewModel class that helps store the data even the configuration changes like rotating screen. By using ViewModel, the app can maintain its UI-related data in a single place, which makes it easier to manage. When the app needs to use the data, it can simply ask the ViewModel for it. This makes the app more reliable and easier to maintain.
What Is MVC in Android
MVC stands for Model View Controller. The MVC pattern is a way of organizing an application’s user interface. The model is the data or information that the application uses. The view is the user interface that the user sees. The controller is the component that controls the view and the model.
The MVC pattern is divided into two parts: the model and the controller. The model is the data that the application uses. The controller is the component that controls the view and the model. The view is the user interface that the user sees.
The MVC pattern is usually used in developing user interfaces. The MVC pattern is a way of organizing an application’s user interface. The model is the data or information that the application uses. The view is the user interface that the user sees. The controller is the component that controls the view and the model.
The MVC pattern is divided into two parts: the model and the controller. The model is the data that the application uses. The controller is the component that controls the view and the model. The view is the user interface that the user sees.
What Is MVP in Architecture
In the Android world, there is a pattern called model view presenter (MVP). MVP is a pattern that is used to create user interfaces. The presenter assumes the functionality of the middle-man. All presentation logic is pushed to the presenter. This makes the presenter very lightweight and easy to use.
The wrap-up
Mvvm is a software development pattern that enables separation of the UI from the logic of an application. This pattern is implemented using a combination of XML and Java. MVVM is an adaptation of the Model View Controller (MVC) ttern.
The key features of MVVM are:
• Separation of the UI and the logic.
• Use of XML to describe the UI.
• Use of Java to implement the logic.
• Use of a ViewModel to manage the data and interactions between the UI and the logic.
MVVM is a popular pattern because it provides a way to modularize an application and make it easier to develop and maintain.
