February 23, 2025
Composable Functions & setContent - Jetpack Compose Course #3

Composable Functions & setContent – Jetpack Compose Course #3

Video by Master Coding via YouTube
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Composable Functions & setContent - Jetpack Compose Course #3

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πŸ“Œ The Complete Android 15 Course [Part 2] – Jetpack Compose
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πŸš€πŸš€πŸš€ What You’ll Learn in This Video πŸš€πŸš€
πŸ“ŒπŸ“Œ Composable Functions in Jetpack Compose
A Composable function is a function that defines part of a UI in Jetpack Compose. It is annotated with @Composable and can be used to create and compose UI elements declaratively.

πŸ“ŒπŸ“Œ Key Features of Composable Functions
Stateless UI: They don’t hold or modify state directly.
Composable: They can call other @Composable functions.
Reusable: They allow modular UI building.
Lightweight: No need for XML layouts; everything is defined in Kotlin.

πŸ“ŒπŸ“Œ @Preview Annotation
The @Preview annotation allows you to preview a Composable function inside Android Studio without running the app on an emulator or a physical device.

πŸ“ŒπŸ“Œ setContent in Jetpack Compose
setContent {} is used in an Activity or Fragment to define the entire UI using Compose.

πŸ“Œ setContent {} replaces setContentView(R.layout.activity_main).
πŸ“Œ Inside setContent {}, you call Composable functions to define the UI.

πŸ“Œ@Composable Defines a UI function
πŸ“Œ@Preview Shows a preview in Android Studio
πŸ“Œ setContent Sets the UI inside an Activity or Fragment

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