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Understanding State in Jetpack Compose (Simple Guide for Beginners)
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Understanding State in Jetpack Compose (Simple Guide for Beginners)

DEV CommunityΒ·MD IBRAHIM KHALILΒ·6 months ago
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#android#jetpackcompose#kotlin#ios#state
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When I first started learning Jetpack Compose, one concept confused me a lot: State.

But once I understood it, everything became much easier.

Let me explain it in a simple way πŸ‘‡

πŸ”„ What is State?

Think of State like a light switch.

When the switch changes β†’ the light updates

When state changes β†’ the UI updates

In Jetpack Compose, UI is automatically redrawn when state changes.

🧩 Basic Example

@Composable fun CounterScreen () { var count by remember { mutableStateOf ( 0 ) }

Column { Text ( text = "Count: $count" )

Button ( onClick = { count ++ }) { Text ( "Increase" ) } } }

Enter fullscreen mode

Exit fullscreen mode

🧠 What’s happening here?

remember β†’ keeps value during recomposition

mutableStateOf β†’ creates observable state

count++ β†’ updates state β†’ UI updates automatically

πŸ‘‰ You don’t manually refresh UI.…

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