criada as telas tela_avisos.dart, tela_detalhes_avisos.dart e tela_contatos.dart

lib/componentes/appbar_custom.dart

@@ -0,0 +1,19 @@
+import 'package:flutter/material.dart';
+import 'package:rkm_educa_app/componentes/text_custom.dart';
+
+import '../utils/cores.dart';
+
+class AppBarCustom{
+  @override
+  PreferredSize appbar(BuildContext context,String title) {
+
+    return PreferredSize(
+      preferredSize: Size.fromHeight(50),
+      child: AppBar(
+        backgroundColor: PaletaCores.appBar,
+        centerTitle: true,
+        title: TextCustom(text: title,color: Colors.white,fontWeight: FontWeight.bold,size: 20.0,),
+      ),
+    );
+  }
+}