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Jetpack Compose Academy · Lesson

Recomposition: What Triggers a Redraw

Understand when Compose re-runs your code.

What Is Recomposition?

Recomposition is Compose re-running your Composable functions to update the screen after some state they read has changed.

Triggered by State Reads

A redraw is triggered only when a piece of state a Composable read actually changes. No state change means no recomposition.

All lessons in this course

  1. remember & mutableStateOf
  2. Recomposition: What Triggers a Redraw
  3. Build a Tap Counter
  4. rememberSaveable Across Rotation
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