Flutter Widget Lifecycle: From initState to dispose

7 min read•February 9, 2026
Flutter lifecycleinitState disposeStatefulWidget lifecycleFlutter memory leakFlutter setState after disposeFlutter widget rebuildFlutter stateful widgetFlutter best practices

# Flutter Widget Lifecycle

Correct lifecycle handling prevents memory leaks and unstable UI behavior.

Core Methods

  • `initState`
  • `didChangeDependencies`
  • `build`
  • `didUpdateWidget`
  • `dispose`

    • Common Pitfalls

  • Calling setState after dispose
  • Not closing streams/controllers
  • Running expensive work in build

    • Conclusion

    Lifecycle discipline leads to predictable and performant screens.

    I can review your screens for lifecycle risks.

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