added: persist_key_value

persist_key_value/lib/main.dart

@@ -0,0 +1,25 @@
+import 'package:flutter/material.dart';
+
+void main() {
+  var nameOfApp = "Persist Key Value";
+
+  runApp(new MaterialApp(
+      // Title
+      title: nameOfApp,
+      // Home
+      home: new Scaffold(
+        // Appbar
+        appBar: new AppBar(
+          // Title
+          title: new Text(nameOfApp),
+        ),
+        // Body
+        body: new Container(
+          // Center the content
+          child: new Center(
+            // Add Text
+            child: new Text("Hello World!"),
+          ),
+        ),
+      )));
+}