添加debug

lib/app.dart

@@ -10,17 +10,9 @@ class MyApp extends StatelessWidget {
     return MaterialApp(
       title: 'ToolBox',
       theme: ThemeData(
-        // This is the theme of your application.
-        //
-        // Try running your application with "flutter run". You'll see the
-        // application has a blue toolbar. Then, without quitting the app, try
-        // changing the primarySwatch below to Colors.green and then invoke
-        // "hot reload" (press "r" in the console where you ran "flutter run",
-        // or simply save your changes to "hot reload" in a Flutter IDE).
-        // Notice that the counter didn't reset back to zero; the application
-        // is not restarted.
         primarySwatch: Colors.blue,
       ),
+      darkTheme: ThemeData.dark(),
       home: const MyHomePage(title: 'ToolBox'),
     );
   }