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e143b4c3a2
Apply a consistent structure to 5 example apps (simple_material_app, stateful_widget, dropdown_button, using_gradient, using_tabs): - lib/main.dart now contains only the app bootstrap: runApp + a const MyApp widget wrapping the app in a MaterialApp. - lib/example.dart holds the full screen (Scaffold, AppBar, and the focused code that demonstrates the example feature), marked with a '// Example:' banner comment. This makes it easy to pinpoint the code that teaches each concept while keeping the wrapping/chrome code uniform and minimal. Review this pilot before rolling the pattern out to the remaining apps.
Stateful Widget
A widget that has mutable state.
A stateful widget is a widget that describes part of the user interface by building a constellation of other widgets that describe the user interface more concretely. The building process continues recursively until the description of the user interface is fully concrete
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Getting Started
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