Jetpack Compose Toast Shows Again and Again? FIXED in Seconds!

Jetpack Compose Toast Shows Again and Again? FIXED in Seconds!

If you're seeing your Toast message repeat every time a composable recomposes, you're not alone. It's a common issue faced by developers working with Jetpack Compose.

In this quick tutorial, you'll learn why this happens and the simple fix using LaunchedEffect that stops the Toast from being triggered multiple times.

Watch this short video for explanation with an example.

The Problem

Many developers write Toasts like this inside a composable:

fun ToastContent() {
    val context = LocalContext.current

    Toast.makeText(context,
            "Welcome!",
            Toast.LENGTH_SHORT)
            .show()
    
}
  

Every time the composable recomposes, this code is re-executed — showing the Toast again and again.

The Fix — Use LaunchedEffect

To show a Toast only once (even during recompositions), wrap it inside a LaunchedEffect block.

@Composable
fun ToastContent() {
    val context = LocalContext.current

    LaunchedEffect(Unit) {
        Toast.makeText(context,
            "Welcome!",
            Toast.LENGTH_SHORT)
            .show()
    }
}
  

LaunchedEffect(Unit) only runs when the composable first enters the composition — not during recomposition.

Why This Works

• Jetpack Compose is declarative — anything inside a composable can be called multiple times.
• LaunchedEffect provides a controlled side-effect block that runs only when the key changes.

Pro Tip

You can also replace Unit with any key if you want the Toast to run only when that value changes:

LaunchedEffect(myKey) {
     Toast.makeText(context,
            "Welcome!",
            Toast.LENGTH_SHORT)
            .show()
}
  

Wrapping Up

That’s it — now your Toast behaves like it should! No more surprises during recompositions.