Imperative vs. Declarative UI Development with Jetpack Compose

PINAR TURGUT
4 min readAug 30

In the world of app development, creating user interfaces has been traditionally approached in an imperative manner. However, with the advent of technologies like Jetpack Compose, a paradigm shift towards declarative UI development has taken place. In this blog post, we’ll explore the key differences between imperative and declarative UI development, with a special focus on how Jetpack Compose revolutionizes the way we build user interfaces.

Imperative Approach (Traditional Android UI): In traditional Android UI development, you might use Java or Kotlin to create UI elements imperatively, specifying each element’s properties and how they should be displayed.

// Imperative Approach (Traditional Android UI)
val button = Button(context)
button.text = "Click me"
button.setOnClickListener {
// Do something when the button is clicked
}
layout.addView(button)

Declarative Approach with Jetpack Compose: With Jetpack Compose, you describe the UI structure declaratively using a composable function. You state what you want and let the framework handle the rest.

// Declarative Approach with Jetpack Compose
@Composable
fun MyScreen() {
Column {
Text(text = "Hello, World!")
Button(onClick = {
// Do something when the button is clicked
}) {
Text(text = "Click me")
}
}
}

In the declarative example, you’re describing the UI structure using Compose’s @Composable functions. You declare a column layout containing a Text element and a Button element. You provide the onClick lambda directly to the Button composable to define its behavior.

The key difference is that in the imperative approach, you explicitly create UI elements and set their properties one by one, whereas in the declarative approach, you describe the desired UI structure and interactions in a more intuitive way. Jetpack Compose takes care of rendering and updating the UI based on your description.

Imperative UI Development

Painting the Pixels Imagine building a painting stroke by stroke, where every brushstroke needs to be explicitly placed on the canvas. This is akin to the imperative approach to UI development. In…

PINAR TURGUT

Android developers who is passionate about personal growth https://pinartechtips.com