Update starter code for Dart 3 & null safety.

ios/Flutter/flutter_export_environment.sh

@@ -0,0 +1,13 @@
+#!/bin/sh
+# This is a generated file; do not edit or check into version control.
+export "FLUTTER_ROOT=/home/alexa/snap/flutter/common/flutter"
+export "FLUTTER_APPLICATION_PATH=/home/alexa/Documents/Clima-Flutter"
+export "COCOAPODS_PARALLEL_CODE_SIGN=true"
+export "FLUTTER_TARGET=lib/main.dart"
+export "FLUTTER_BUILD_DIR=build"
+export "FLUTTER_BUILD_NAME=1.0.0"
+export "FLUTTER_BUILD_NUMBER=1"
+export "DART_OBFUSCATION=false"
+export "TRACK_WIDGET_CREATION=true"
+export "TREE_SHAKE_ICONS=false"
+export "PACKAGE_CONFIG=.dart_tool/package_config.json"

lib/screens/city_screen.dart

@@ -23,7 +23,7 @@ class _CityScreenState extends State<CityScreen> {
             children: <Widget>[
               Align(
                 alignment: Alignment.topLeft,
-                child: FlatButton(
+                child: TextButton(
                   onPressed: () {},
                   child: Icon(
                     Icons.arrow_back_ios,
@@ -35,7 +35,7 @@ class _CityScreenState extends State<CityScreen> {
                 padding: EdgeInsets.all(20.0),
                 child: null,
               ),
-              FlatButton(
+              TextButton(
                 onPressed: () {},
                 child: Text(
                   'Get Weather',

lib/screens/loading_screen.dart

@@ -10,7 +10,7 @@ class _LoadingScreenState extends State<LoadingScreen> {
   Widget build(BuildContext context) {
     return Scaffold(
       body: Center(
-        child: RaisedButton(
+        child: ElevatedButton(
           onPressed: () {
             //Get the current location
           },

lib/screens/location_screen.dart

@@ -16,7 +16,7 @@ class _LocationScreenState extends State<LocationScreen> {
             image: AssetImage('images/location_background.jpg'),
             fit: BoxFit.cover,
             colorFilter: ColorFilter.mode(
-                Colors.white.withOpacity(0.8), BlendMode.dstATop),
+                Colors.white.withValues(alpha: 0.8), BlendMode.dstATop),
           ),
         ),
         constraints: BoxConstraints.expand(),
@@ -28,14 +28,14 @@ class _LocationScreenState extends State<LocationScreen> {
               Row(
                 mainAxisAlignment: MainAxisAlignment.spaceBetween,
                 children: <Widget>[
-                  FlatButton(
+                  TextButton(
                     onPressed: () {},
                     child: Icon(
                       Icons.near_me,
                       size: 50.0,
                     ),
                   ),
-                  FlatButton(
+                  TextButton(
                     onPressed: () {},
                     child: Icon(
                       Icons.location_city,

pubspec.lock

@@ -1,69 +1,62 @@
 # Generated by pub
 # See https://dart.dev/tools/pub/glossary#lockfile
 packages:
-  archive:
-    dependency: transitive
-    description:
-      name: archive
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.0.11"
-  args:
-    dependency: transitive
-    description:
-      name: args
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.5.2"
   async:
     dependency: transitive
     description:
       name: async
-      url: "https://pub.dartlang.org"
+      sha256: "947bfcf187f74dbc5e146c9eb9c0f10c9f8b30743e341481c1e2ed3ecc18c20c"
+      url: "https://pub.dev"
     source: hosted
-    version: "2.4.0"
+    version: "2.11.0"
   boolean_selector:
     dependency: transitive
     description:
       name: boolean_selector
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.0.5"
-  charcode:
-    dependency: transitive
-    description:
-      name: charcode
-      url: "https://pub.dartlang.org"
+      sha256: "6cfb5af12253eaf2b368f07bacc5a80d1301a071c73360d746b7f2e32d762c66"
+      url: "https://pub.dev"
     source: hosted
-    version: "1.1.2"
-  collection:
+    version: "2.1.1"
+  characters:
     dependency: transitive
     description:
-      name: collection
-      url: "https://pub.dartlang.org"
+      name: characters
+      sha256: "04a925763edad70e8443c99234dc3328f442e811f1d8fd1a72f1c8ad0f69a605"
+      url: "https://pub.dev"
     source: hosted
-    version: "1.14.11"
-  convert:
+    version: "1.3.0"
+  clock:
     dependency: transitive
     description:
-      name: convert
-      url: "https://pub.dartlang.org"
+      name: clock
+      sha256: cb6d7f03e1de671e34607e909a7213e31d7752be4fb66a86d29fe1eb14bfb5cf
+      url: "https://pub.dev"
     source: hosted
-    version: "2.1.1"
-  crypto:
+    version: "1.1.1"
+  collection:
     dependency: transitive
     description:
-      name: crypto
-      url: "https://pub.dartlang.org"
+      name: collection
+      sha256: a1ace0a119f20aabc852d165077c036cd864315bd99b7eaa10a60100341941bf
+      url: "https://pub.dev"
     source: hosted
-    version: "2.1.3"
+    version: "1.19.0"
   cupertino_icons:
     dependency: "direct main"
     description:
       name: cupertino_icons
-      url: "https://pub.dartlang.org"
+      sha256: ba631d1c7f7bef6b729a622b7b752645a2d076dba9976925b8f25725a30e1ee6
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.0.8"
+  fake_async:
+    dependency: transitive
+    description:
+      name: fake_async
+      sha256: "511392330127add0b769b75a987850d136345d9227c6b94c96a04cf4a391bf78"
+      url: "https://pub.dev"
     source: hosted
-    version: "0.1.2"
+    version: "1.3.1"
   flutter:
     dependency: "direct main"
     description: flutter
@@ -74,122 +67,131 @@ packages:
     description: flutter
     source: sdk
     version: "0.0.0"
-  image:
+  leak_tracker:
     dependency: transitive
     description:
-      name: image
-      url: "https://pub.dartlang.org"
+      name: leak_tracker
+      sha256: "7bb2830ebd849694d1ec25bf1f44582d6ac531a57a365a803a6034ff751d2d06"
+      url: "https://pub.dev"
     source: hosted
-    version: "2.1.4"
-  matcher:
+    version: "10.0.7"
+  leak_tracker_flutter_testing:
     dependency: transitive
     description:
-      name: matcher
-      url: "https://pub.dartlang.org"
+      name: leak_tracker_flutter_testing
+      sha256: "9491a714cca3667b60b5c420da8217e6de0d1ba7a5ec322fab01758f6998f379"
+      url: "https://pub.dev"
     source: hosted
-    version: "0.12.6"
-  meta:
+    version: "3.0.8"
+  leak_tracker_testing:
     dependency: transitive
     description:
-      name: meta
-      url: "https://pub.dartlang.org"
+      name: leak_tracker_testing
+      sha256: "6ba465d5d76e67ddf503e1161d1f4a6bc42306f9d66ca1e8f079a47290fb06d3"
+      url: "https://pub.dev"
     source: hosted
-    version: "1.1.8"
-  path:
+    version: "3.0.1"
+  matcher:
     dependency: transitive
     description:
-      name: path
-      url: "https://pub.dartlang.org"
+      name: matcher
+      sha256: d2323aa2060500f906aa31a895b4030b6da3ebdcc5619d14ce1aada65cd161cb
+      url: "https://pub.dev"
     source: hosted
-    version: "1.6.4"
-  pedantic:
+    version: "0.12.16+1"
+  material_color_utilities:
     dependency: transitive
     description:
-      name: pedantic
-      url: "https://pub.dartlang.org"
+      name: material_color_utilities
+      sha256: f7142bb1154231d7ea5f96bc7bde4bda2a0945d2806bb11670e30b850d56bdec
+      url: "https://pub.dev"
     source: hosted
-    version: "1.8.0+1"
-  petitparser:
+    version: "0.11.1"
+  meta:
     dependency: transitive
     description:
-      name: petitparser
-      url: "https://pub.dartlang.org"
+      name: meta
+      sha256: bdb68674043280c3428e9ec998512fb681678676b3c54e773629ffe74419f8c7
+      url: "https://pub.dev"
     source: hosted
-    version: "2.4.0"
-  quiver:
+    version: "1.15.0"
+  path:
     dependency: transitive
     description:
-      name: quiver
-      url: "https://pub.dartlang.org"
+      name: path
+      sha256: "087ce49c3f0dc39180befefc60fdb4acd8f8620e5682fe2476afd0b3688bb4af"
+      url: "https://pub.dev"
     source: hosted
-    version: "2.0.5"
+    version: "1.9.0"
   sky_engine:
     dependency: transitive
     description: flutter
     source: sdk
-    version: "0.0.99"
+    version: "0.0.0"
   source_span:
     dependency: transitive
     description:
       name: source_span
-      url: "https://pub.dartlang.org"
+      sha256: "53e943d4206a5e30df338fd4c6e7a077e02254531b138a15aec3bd143c1a8b3c"
+      url: "https://pub.dev"
     source: hosted
-    version: "1.5.5"
+    version: "1.10.0"
   stack_trace:
     dependency: transitive
     description:
       name: stack_trace
-      url: "https://pub.dartlang.org"
+      sha256: "9f47fd3630d76be3ab26f0ee06d213679aa425996925ff3feffdec504931c377"
+      url: "https://pub.dev"
     source: hosted
-    version: "1.9.3"
+    version: "1.12.0"
   stream_channel:
     dependency: transitive
     description:
       name: stream_channel
-      url: "https://pub.dartlang.org"
+      sha256: ba2aa5d8cc609d96bbb2899c28934f9e1af5cddbd60a827822ea467161eb54e7
+      url: "https://pub.dev"
     source: hosted
-    version: "2.0.0"
+    version: "2.1.2"
   string_scanner:
     dependency: transitive
     description:
       name: string_scanner
-      url: "https://pub.dartlang.org"
+      sha256: "688af5ed3402a4bde5b3a6c15fd768dbf2621a614950b17f04626c431ab3c4c3"
+      url: "https://pub.dev"
     source: hosted
-    version: "1.0.5"
+    version: "1.3.0"
   term_glyph:
     dependency: transitive
     description:
       name: term_glyph
-      url: "https://pub.dartlang.org"
+      sha256: a29248a84fbb7c79282b40b8c72a1209db169a2e0542bce341da992fe1bc7e84
+      url: "https://pub.dev"
     source: hosted
-    version: "1.1.0"
+    version: "1.2.1"
   test_api:
     dependency: transitive
     description:
       name: test_api
-      url: "https://pub.dartlang.org"
+      sha256: "664d3a9a64782fcdeb83ce9c6b39e78fd2971d4e37827b9b06c3aa1edc5e760c"
+      url: "https://pub.dev"
     source: hosted
-    version: "0.2.11"
-  typed_data:
-    dependency: transitive
-    description:
-      name: typed_data
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.1.6"
+    version: "0.7.3"
   vector_math:
     dependency: transitive
     description:
       name: vector_math
-      url: "https://pub.dartlang.org"
+      sha256: "80b3257d1492ce4d091729e3a67a60407d227c27241d6927be0130c98e741803"
+      url: "https://pub.dev"
     source: hosted
-    version: "2.0.8"
-  xml:
+    version: "2.1.4"
+  vm_service:
     dependency: transitive
     description:
-      name: xml
-      url: "https://pub.dartlang.org"
+      name: vm_service
+      sha256: f6be3ed8bd01289b34d679c2b62226f63c0e69f9fd2e50a6b3c1c729a961041b
+      url: "https://pub.dev"
     source: hosted
-    version: "3.5.0"
+    version: "14.3.0"
 sdks:
-  dart: ">=2.4.0 <3.0.0"
+  dart: ">=3.4.0 <4.0.0"
+  flutter: ">=3.18.0-18.0.pre.54"

pubspec.yaml

@@ -4,13 +4,13 @@ description: A new Flutter application.
 version: 1.0.0+1
 
 environment:
-  sdk: ">=2.1.0 <3.0.0"
+  sdk: ">=2.17.0 <4.0.0"
 
 dependencies:
   flutter:
     sdk: flutter
 
-  cupertino_icons: ^0.1.2
+  cupertino_icons: ^1.0.8
 
 dev_dependencies:
   flutter_test:
@@ -20,10 +20,10 @@ flutter:
   uses-material-design: true
 
   assets:
-  - images/
+    - images/
 
   fonts:
-  - family: Spartan MB
-    fonts:
-    - asset: fonts/SpartanMB-Black.otf
-      weight: 900
+    - family: Spartan MB
+      fonts:
+        - asset: fonts/SpartanMB-Black.otf
+          weight: 900