refactor: split app wrapper from focused example code (multi-file apps)

Convert 17 multi-file apps to the validated pattern: lib/main.dart keeps only the MaterialApp bootstrap; a new lib/example.dart holds the full entry screen and focused example code, importing existing supporting files (screens/, tabs/, services/, models/, widgets/, utils/). Apps: analytics_integration, animation_example, biometrics, bottom_sheet, custom_home_drawer, google_signin, grid_layout, handling_routes, image_editor, scan_qr_code, statless_counter_app, using_bottom_nav_bar, using_custom_fonts, using_listview, using_listwheelscrollview, using_platform_adaptive, view_pdf_file
2026-08-25 01:05:36 +00:00 · 2026-08-18 00:48:50 +02:00
parent 780c0f1dbb
commit 6e3ff94bfe
34 changed files with 1002 additions and 766 deletions
--- a/using_platform_adaptive/lib/example.dart
+++ b/using_platform_adaptive/lib/example.dart
@@ -0,0 +1,123 @@
+// Example: Platform adaptive widgets
+import 'package:flutter/material.dart';
+import 'package:using_platform_adaptive/common_widgets/adaptive_button.dart';
+import 'package:using_platform_adaptive/common_widgets/adaptive_date_picker.dart';
+import 'package:using_platform_adaptive/common_widgets/adaptive_indicator.dart';
+
+class Example extends StatefulWidget {
+  const Example({super.key, this.title = 'Using Platform Adaptive'});
+  final String title;
+
+  @override
+  State<Example> createState() => _ExampleState();
+}
+
+class _ExampleState extends State<Example> {
+  TargetPlatform? selectedPlatform;
+  final String introText = "Flutter's flagship feature is it's ability to write"
+      " code once and have it run on multiple devices. While this is great, sometimes"
+      " you want the user interface to look more native to its platform. This project"
+      " showcases the Platform Adaptive pattern, a powerful pattern that allows you"
+      " to create widgets that you write once and look natural on any device. The"
+      " demo is just set up to work on android and iOS but can be extended to work"
+      " on web, native and any other platform flutter supports.";
+
+  @override
+  Widget build(BuildContext context) {
+    final platforms = {
+      "Default": null,
+      "Android": TargetPlatform.android,
+      "iOS": TargetPlatform.iOS,
+    };
+    return Scaffold(
+      backgroundColor: Colors.white,
+      appBar: AppBar(
+        title: Text(widget.title),
+      ),
+      body: Container(
+        padding: const EdgeInsets.all(30),
+        child: Column(
+          mainAxisAlignment: MainAxisAlignment.start,
+          children: <Widget>[
+            Text(introText),
+            const SizedBox(height: 30),
+            Row(
+              mainAxisAlignment: MainAxisAlignment.center,
+              children: [
+                const Text("Force a platform:  "),
+                DropdownButton(
+                  value: selectedPlatform,
+                  items: List<DropdownMenuItem>.from(platforms.entries.map(
+                      (e) => DropdownMenuItem(
+                          value: e.value, child: Text(e.key)))),
+                  onChanged: (value) {
+                    setState(() {
+                      selectedPlatform = value;
+                    });
+                  },
+                ),
+              ],
+            ),
+            Row(
+              mainAxisAlignment: MainAxisAlignment.center,
+              children: [
+                const Text("Buttons:  "),
+                AdaptiveButton(
+                  forcePlatform: selectedPlatform,
+                  color: Colors.teal,
+                  onPressed: () {},
+                  child: const Text("I'm a button"),
+                ),
+              ],
+            ),
+            const SizedBox(height: 10),
+            Row(
+              mainAxisAlignment: MainAxisAlignment.center,
+              children: [
+                const Text("Dialogs:  "),
+                AdaptiveButton(
+                  forcePlatform: selectedPlatform,
+                  color: Colors.teal,
+                  onPressed: () {
+                    showDialog(
+                        context: context,
+                        builder: (context) {
+                          return AdaptiveDialog(
+                            title: "Test",
+                            content: const Text("This is the content area"),
+                            actions: [
+                              AdaptiveDialogAction(
+                                text: "Action 1",
+                                forcePlatform: selectedPlatform,
+                                onPressed: () {},
+                              ),
+                              AdaptiveDialogAction(
+                                text: "Action 2",
+                                forcePlatform: selectedPlatform,
+                                onPressed: () {},
+                              ),
+                            ],
+                            forcePlatform: selectedPlatform,
+                          );
+                        });
+                  },
+                  child: const Text("Show"),
+                ),
+              ],
+            ),
+            const SizedBox(height: 10),
+            Row(
+              mainAxisAlignment: MainAxisAlignment.center,
+              children: [
+                const Text("Loading Indicator:   "),
+                AdaptiveIndicator(
+                  forcePlatform: selectedPlatform,
+                ),
+              ],
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+}