기본 초기세팅 작업

lib/main.dart

@@ -1,5 +1,58 @@
+import 'dart:convert';
 import 'package:flutter/material.dart';
+import 'package:http/http.dart' as http;
 
 void main() {
-  runApp(const MaterialApp());
+    runApp(const App());
+}
+
+class App extends StatelessWidget {
+    const App({super.key});
+
+    Future<bool> checkApiConnection() async {
+        final res = await http.get(
+            Uri.parse('http://localhost:5000/db'),
+        );
+
+        final Map<String, dynamic> data = jsonDecode(res.body);
+        return data['value'] == 777;
+    }
+
+    @override
+    Widget build(BuildContext context) {
+        return MaterialApp(
+            home: Scaffold(
+                body: Center(
+                    child: FutureBuilder<bool>(
+                        future: checkApiConnection(),
+                        builder: (context, snapshot) {
+                            if (snapshot.connectionState == ConnectionState.waiting) {
+                                return const CircularProgressIndicator();
+                            }
+                            if (snapshot.hasError) {
+                                return const Text(
+                                    'API SERVER CONNECTION FAILED',
+                                    style: TextStyle(
+                                        fontSize: 20,
+                                        fontWeight: FontWeight.bold,
+                                        color: Colors.red,
+                                    ),
+                                );
+                            }
+
+                            return const Text(
+                                'API SERVER CONNECTED',
+                                style: TextStyle(
+                                    fontSize: 22,
+                                    fontWeight: FontWeight.bold,
+                                    color: Colors.green,
+                                    letterSpacing: 1.2,
+                                ),
+                            );
+                        },
+                    ),
+                ),
+            ),
+        );
+    }
 }

pubspec.lock

@@ -75,6 +75,22 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.0"
+  http:
+    dependency: "direct main"
+    description:
+      name: http
+      sha256: b9c29a161230ee03d3ccf545097fccd9b87a5264228c5d348202e0f0c28f9010
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.2.2"
+  http_parser:
+    dependency: transitive
+    description:
+      name: http_parser
+      sha256: "2aa08ce0341cc9b354a498388e30986515406668dbcc4f7c950c3e715496693b"
+      url: "https://pub.dev"
+    source: hosted
+    version: "4.0.2"
   leak_tracker:
     dependency: transitive
     description:
@@ -192,6 +208,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "0.6.1"
+  typed_data:
+    dependency: transitive
+    description:
+      name: typed_data
+      sha256: facc8d6582f16042dd49f2463ff1bd6e2c9ef9f3d5da3d9b087e244a7b564b3c
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.3.2"
   vector_math:
     dependency: transitive
     description:
@@ -208,5 +232,13 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "13.0.0"
+  web:
+    dependency: transitive
+    description:
+      name: web
+      sha256: "97da13628db363c635202ad97068d47c5b8aa555808e7a9411963c533b449b27"
+      url: "https://pub.dev"
+    source: hosted
+    version: "0.5.1"
 sdks:
   dart: ">=3.3.4 <4.0.0"

pubspec.yaml

@@ -30,6 +30,7 @@ environment:
 dependencies:
   flutter:
     sdk: flutter
+  http: ^1.2.0
 
 
   # The following adds the Cupertino Icons font to your application.