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Animations

June 02, 2026 • 1 min read

Flutter makes animation easy. Implicit animations animate automatically when a value changes; explicit ones give full control.

Implicit (easiest)

AnimatedContainer(
  duration: Duration(milliseconds: 300),
  width: expanded ? 200 : 100,
  color: expanded ? Colors.blue : Colors.grey,
)
// just change `expanded` in setState — it animates

Explicit

Use an AnimationController (with a TickerProvider) for custom, repeatable animations.

Tip: Reach for AnimatedContainer, AnimatedOpacity and Hero first — they cover most needs with almost no code.

Summary

Implicit animations (AnimatedContainer, AnimatedOpacity) cover most cases; use AnimationController for advanced control.