Updated

New/Section04/note_keeper/lib/models/note.dart

@@ -0,0 +1,52 @@
+class Note{
+  int _id;
+  String _title;
+  String _description;
+  String _date;
+  int _priority;
+
+  Note(this._title,this._date,this._priority,[this._description]);
+  Note.withId(this._id,this._title,this._date,this._priority,[this._description]);
+
+  int get id=>_id;
+  String get title=>_title;
+  String get description => _description;
+  String get date => _date;
+  int get priority => _priority;
+
+  set title(String newTitle){
+    if(newTitle.length<=255){
+      this._title=newTitle;
+    }
+  }
+
+  set description(String newDescription){
+    if(newDescription.length<=255){
+      this._description=newDescription;
+    }
+  }
+
+  set (String newDate){
+      this._date=newDate;
+  }
+
+
+  set priority(int newPriority){
+    if(newPriority>=1 && newPriority<=2){
+      this._priority=newPriority;
+    }
+  }
+
+  Map<String,dynamic> toMap(){
+    var map=Map<String,dynamic>();
+    if(_id!=null){
+      map['id']=_id;
+    }
+    map['title']=_title;
+    map['description']=_description;
+    map['date']=_date;
+    map['priority']=_priority;
+
+    return map;
+  }
+}

New/Section04/note_keeper/lib/screens/note_list.dart

@@ -16,6 +16,9 @@ class NoteListState extends State<NoteList> {
   Widget build(BuildContext context) {
     // TODO: implement build
     return WillPopScope(
+      onWillPop: (){
+        gotoBackScreen();
+      },
       child: Scaffold(
         appBar: AppBar(
           title: Text("Notes"),
@@ -35,6 +38,7 @@ class NoteListState extends State<NoteList> {
           child: Icon(Icons.add),
         ),
       ),
+
     );
   }
 

New/Section04/note_keeper/pubspec.lock

@@ -46,6 +46,13 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.0"
+  intl:
+    dependency: "direct main"
+    description:
+      name: intl
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "0.16.0"
   matcher:
     dependency: transitive
     description:
@@ -67,13 +74,27 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.6.2"
+  path_provider:
+    dependency: "direct main"
+    description:
+      name: path_provider
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.3.0"
   pedantic:
     dependency: transitive
     description:
       name: pedantic
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.7.0"
+  platform:
+    dependency: transitive
+    description:
+      name: platform
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.2.1"
   quiver:
     dependency: transitive
     description:
@@ -93,6 +114,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.5.5"
+  sqflite:
+    dependency: "direct main"
+    description:
+      name: sqflite
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.1.6+5"
   stack_trace:
     dependency: transitive
     description:
@@ -114,6 +142,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.0.4"
+  synchronized:
+    dependency: transitive
+    description:
+      name: synchronized
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.0+1"
   term_glyph:
     dependency: transitive
     description:
@@ -144,3 +179,4 @@ packages:
     version: "2.0.8"
 sdks:
   dart: ">=2.2.2 <3.0.0"
+  flutter: ">=1.2.1 <2.0.0"

New/Section04/note_keeper/pubspec.yaml

@@ -19,6 +19,9 @@ environment:
 dependencies:
   flutter:
     sdk: flutter
+  sqflite: any
+  path_provider: any
+  intl: ^0.16.0
 
   # The following adds the Cupertino Icons font to your application.
   # Use with the CupertinoIcons class for iOS style icons.