In a Flutter Todo App, adding a new task involves opening a dialog where users can input task details. This dialog typically features a TextField for the task title, optional TextFields for description and due date, and action buttons like 'Save' and 'Cancel'. When 'Save' is pressed, the input data is validated and added to the task list. The dialog uses a showDialog function to overlay a form on the current screen, ensuring a seamless user experience. Proper state management, such as using setState or a state management solution like Provider or Bloc, ensures the UI updates accordingly.
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