GUIDES
A handful of common Flutter widgets — Slider, Drawer, TabBar, and rounded image borders — covered together since they all show up in nearly every real app's navigation and settings screens.
Flutter's Color constructor expects a full 8-digit ARGB hex value, not the familiar 6-digit web format — a common early mismatch worth understanding directly.
Checkbox itself is a controlled widget with no internal state of its own — every value change has to be reflected back through setState(), or the checkbox silently reverts on the next rebuild.
The debug banner is purely visual and only ever appears in debug builds — it never ships to a real release build regardless, but it's still worth hiding for screenshots and client demos.
BoxDecoration handles borders and rounded corners on a Container directly — an Image needs a separate ClipRRect wrapper instead, since it doesn't accept a decoration property of its own.
Passing data between routes, refreshing a page after popping back to it, and subscribing to navigation events all build on the same Navigator API.
Navigator.pop() can carry a return value back to the screen that pushed it — the mechanism behind refreshing a list after an add/edit screen closes, without a separate state-management solution.
The http package's get() and post() methods, combined with dart:convert's jsonDecode, cover most API calls a typical Flutter app needs to make.
Bottom navigation switches between entirely separate top-level screens; a top TabBar switches between views within one single screen — mixing up which one a given navigation need actually calls for is a common early mistake.
A vertical content feed and a TikTok-style full-screen swipe feed are built from two genuinely different scrolling widgets — SingleChildScrollView versus PageView — not variations of the same one.
Use NavigationDrawer for Material 3 destinations, close the drawer before routing, preserve accessible selection, and move to persistent navigation on wider layouts.
A PageView with vertical scroll direction is the core of a TikTok-style feed — combined with checkboxes, background images, and turning off the debug banner for a cleaner build.
