- April 23, 2024
- Posted by: Akanksha Kansara
- Category: Mobile Development
Choosing the correct architecture for Android development is crucial for building scalable, maintainable, and efficient applications. The architecture forms the foundation of the app’s structure, defining how components interact and how the code is organized.
Here are some popular architecture patterns used in Android development and the power they bring:
Model-View-Controller (MVC):
The Model-View-Controller (MVC) architecture is suitable for a wide range of applications, particularly those with simpler requirements or where the focus is more on rapid development rather than complex architecture.
- Model: This component stores the application data. It does not know the interface. The model is accountable for controlling the domain logic (real-world business rules) and communication with the database and network layers.
- View: It is the UI (User Interface) layer that holds components that are visible on the screen. Moreover, it visualizes the data stored in the Model and offers user interaction.
- Controller: This component sets up the relationship between the View and the Model. It includes the core application logic gets informed of the user’s behavior and updates the Model as per the requirement.
The Model-View-Controller (MVC) architecture is suitable for a wide range of applications, particularly those with simpler requirements or where the focus is more on rapid development rather than complex architecture.
Model-View-Presenter (MVP):
- Model: Like MVC.
- View: Passive UI components, devoid of business logic.
- Presenter: Acts as an intermediary between the model and view, handling UI updates.
- Power: Improves testability by decoupling UI logic from the view. However, it is still prone to massive presenters and tight coupling.
Model-View-View Model (MVVM):
- Model: The Model signifies the data and business logic of the application. It can include data classes, network calls, database operations, etc.
data class User(val name: String, val age: Int)
- View: The View exemplifies the user interface of the application. It includes XML layout files, activities, fragments, and other UI components.
class MainActivity : AppCompatActivity() {
class MainActivity : AppCompatActivity() {
override fun onCreate(savedInstanceState: Bundle?) {
super.onCreate(savedInstanceState)
setContentView(R.layout.activity_main)
userViewModel = ViewModelProvider(this).get(UserViewModel::class.java)
userViewModel.user.observe(this, Observer { user ->
// Update UI with user data
textViewName.text = user.name
textViewAge.text = user.age.toString()
})
buttonUpdate.setOnClickListener {
userViewModel.updateUser(editTextName.text.toString(), editTextAge.text.toString().toInt())
}
}
}
- View Model: The View Model acts as a mediator between the Model and the View. It contains the business logic needed to update the UI based on data changes. It also handles user interactions and communicates with the Model to retrieve and save data.
class UserViewModel : ViewModel() {
private val _user = MutableLiveData()
val user: LiveData
get() = _user
init {
_user.value = User("John Doe", 30)
}
fun updateUser(name: String, age: Int) {
_user.value = User(name, age)
}
}
MVVM is a powerful design pattern that can help you build well-structured and maintainable Android applications. It promotes separation of concerns, improves testability, and enhances the overall user experience.