fix: Revert Cubic to PathInterpolator.cubic (#173)

And allow to use an imageProviderFactory with a zip file.

.github/workflows/analyze-and-test.yaml

@@ -10,7 +10,7 @@ jobs:
     name: Flutter analyze
     strategy:
       matrix:
-        flutter: ['stable', 'dev']
+        flutter: ['beta']
     runs-on: macos-latest
     steps:
       - uses: actions/checkout@v2
@@ -33,3 +33,17 @@ jobs:
                    "and check in all changes" \
               && exit 1)
         shell: bash
+  build_web_version:
+    name: Check that the web version compile
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: subosito/flutter-action@v1
+        with:
+          channel: 'beta'
+      - run: flutter config --enable-web
+      - run: flutter precache web
+      - run: flutter pub get
+        working-directory: example
+      - run: flutter build web
+        working-directory: example

.github/workflows/publish-on-pub.yaml

@@ -10,16 +10,14 @@ jobs:
       - uses: actions/checkout@v2
       - uses: subosito/flutter-action@v1
         with:
-          channel: 'stable'
+          channel: 'beta'
       - run: flutter pub get
       - run: flutter pub run tool/publish/comment_dependency_overrides.dart
       - run: flutter pub get
-      - run: echo ::set-env name=RELEASE_VERSION::${GITHUB_REF}
-      - run: flutter pub run tool/publish/check_version.dart ${{ env.RELEASE_VERSION }}
+      - run: flutter pub run tool/publish/check_version.dart ${GITHUB_REF}
       - name: Setup credentials
         run: |
-          mkdir -p $FLUTTER_HOME/.pub-cache
-          cat <<EOF > $FLUTTER_HOME/.pub-cache/credentials.json
+          cat <<EOF > $PUB_CACHE/credentials.json
           {
             "accessToken":"${{ secrets.OAUTH_ACCESS_TOKEN }}",
             "refreshToken":"${{ secrets.OAUTH_REFRESH_TOKEN }}",

CHANGELOG.md

@@ -1,3 +1,83 @@
+## [1.2.1]
+- Fix: Revert Cubic to `PathInterpolator.cubic`
+
+## [1.2.0]
+- Add support for gaussian blurs.
+
+Example to blur some elements dynamically:
+  
+```dart
+Lottie.asset(
+  'assets/AndroidWave.json',
+  delegates: LottieDelegates(values: [
+    ValueDelegate.blurRadius(
+      ['**'], // The path to the element to blur
+      value: 20,
+    ),
+  ]),
+)
+```
+
+- Add support for drop shadows.
+
+Example to add a shadow dynamically:
+```dart
+Lottie.asset(
+  'assets/animation.json',
+  delegates: LottieDelegates(values: [
+    ValueDelegate.dropShadow(
+      ['**'], // The path to the elements with shadow
+      value: const DropShadow(
+        color: Colors.blue,
+        direction: 140,
+        distance: 60,
+        radius: 10,
+      ),
+    ),
+  ]),
+)
+```
+
+## [1.1.0]
+- Add `errorBuilder` callback to provide an alternative widget in case an error occurs during loading.
+```dart
+Lottie.network(
+  'https://example.does.not.exist/lottie.json',
+  errorBuilder: (context, exception, stackTrace) {
+    return const Text('😢');
+  },
+);
+```
+
+- Add `onWarning` to be notified when a warning occurs during the animation parsing or painting.
+  Previously the warnings where written in an internal `logger`.
+  ```dart
+  Lottie.asset('animation.json'
+    onWarning: (warning) {
+      _logger.info(warning);
+    },
+  );
+  ```
+- Various bug fixes
+
+## [1.0.1]
+- Implement `RenderBox.computeDryLayout`
+
+## [1.0.0]
+- Migrate to null safety
+- Fix some rendering bugs
+- Add an image delegate to dynamically change images
+- Allow to use an imageProviderFactory with a zip file
+
+## [0.7.1]
+- Fix a crash for some lottie file with empty paths.
+
+## [0.7.0+1]
+- Fix Flutter Web compilation error
+
+## [0.7.0]
+- Performance improvement for complex animations.
+
 ## [0.6.0]
 - Runs the animation at the frame rate specified in the json file (ie. An animation encoded with a 20 FPS will only
   be paint 20 times per seconds even though the AnimationController will invalidate the widget 60 times per seconds).  

README.md

@@ -6,9 +6,9 @@
 Lottie is a mobile library for Android and iOS that parses [Adobe After Effects](https://www.adobe.com/products/aftereffects.html) 
 animations exported as json with [Bodymovin](https://github.com/airbnb/lottie-web) and renders them natively on mobile!
 
-This repository is a unofficial conversion of the [Lottie-android](https://github.com/airbnb/lottie-android) library in pure Dart. 
+This repository is an unofficial conversion of the [Lottie-android](https://github.com/airbnb/lottie-android) library in pure Dart. 
 
-It works on Android, iOS and macOS and web.
+It works on Android, iOS, macOS, linux, windows and web.
 
 ## Usage
 
@@ -20,9 +20,11 @@ The `Lottie` widget will load the json file and run the animation indefinitely.
 import 'package:flutter/material.dart';
 import 'package:lottie/lottie.dart';
 
-void main() => runApp(MyApp());
+void main() => runApp(const MyApp());
 
 class MyApp extends StatelessWidget {
+  const MyApp({Key? key}) : super(key: key);
+
   @override
   Widget build(BuildContext context) {
     return MaterialApp(
@@ -56,15 +58,17 @@ With a custom `AnimationController` you have a rich API to play the animation in
 import 'package:flutter/material.dart';
 import 'package:lottie/lottie.dart';
 
-void main() => runApp(MyApp());
+void main() => runApp(const MyApp());
 
 class MyApp extends StatefulWidget {
+  const MyApp({Key? key}) : super(key: key);
+
   @override
   _MyAppState createState() => _MyAppState();
 }
 
 class _MyAppState extends State<MyApp> with TickerProviderStateMixin {
-  AnimationController _controller;
+  late final AnimationController _controller;
 
   @override
   void initState() {
@@ -132,12 +136,14 @@ This example shows how to load and parse a Lottie composition from a json file.
 
 ```dart
 class MyWidget extends StatefulWidget {
+  const MyWidget({Key? key}) : super(key: key);
+
   @override
   _MyWidgetState createState() => _MyWidgetState();
 }
 
 class _MyWidgetState extends State<MyWidget> {
-  Future<LottieComposition> _composition;
+  late final Future<LottieComposition> _composition;
 
   @override
   void initState() {
@@ -160,7 +166,7 @@ class _MyWidgetState extends State<MyWidget> {
         if (composition != null) {
           return Lottie(composition: composition);
         } else {
-          return Center(child: CircularProgressIndicator());
+          return const Center(child: CircularProgressIndicator());
         }
       },
     );
@@ -176,13 +182,13 @@ a specific position and size.
 class CustomDrawer extends StatelessWidget {
   final LottieComposition composition;
 
-  const CustomDrawer(this.composition, {Key key}) : super(key: key);
+  const CustomDrawer(this.composition, {Key? key}) : super(key: key);
 
   @override
   Widget build(BuildContext context) {
     return CustomPaint(
       painter: _Painter(composition),
-      size: Size(400, 400),
+      size: const Size(400, 400),
     );
   }
 }
@@ -236,7 +242,7 @@ class _Animation extends StatelessWidget {
           ),
           ValueDelegate.position(
             const ['Shape Layer 1', 'Rectangle', '**'],
-            relative: Offset(100, 200),
+            relative: const Offset(100, 200),
           ),
         ],
       ),
@@ -246,13 +252,12 @@ class _Animation extends StatelessWidget {
 ````
 
 ## Limitations
-Only the [supported features of Lottie Android](https://airbnb.io/lottie/#/supported-features)
-are supported in this port.
+This port supports the same [feature set as Lottie Android](https://airbnb.io/lottie/#/supported-features).
 
 ## Flutter Web
-Run the app with `flutter run -d Chrome --dart-define=FLUTTER_WEB_USE_SKIA=true --release`
+Run the app with `flutter run -d chrome --web-renderer canvaskit`
 
-See a preview here: https://xvrh.github.io/lottie-flutter/index.html
+See a preview here: https://xvrh.github.io/lottie-flutter-web/
 
 ## More examples
 See the `example` folder for more code samples of the various possibilities.

README.template.md

@@ -6,9 +6,9 @@
 Lottie is a mobile library for Android and iOS that parses [Adobe After Effects](https://www.adobe.com/products/aftereffects.html) 
 animations exported as json with [Bodymovin](https://github.com/airbnb/lottie-web) and renders them natively on mobile!
 
-This repository is a unofficial conversion of the [Lottie-android](https://github.com/airbnb/lottie-android) library in pure Dart. 
+This repository is an unofficial conversion of the [Lottie-android](https://github.com/airbnb/lottie-android) library in pure Dart. 
 
-It works on Android, iOS and macOS and web.
+It works on Android, iOS, macOS, linux, windows and web.
 
 ## Usage
 
@@ -78,13 +78,12 @@ import 'example/lib/examples/simple_dynamic_properties.dart#example';
 ````
 
 ## Limitations
-Only the [supported features of Lottie Android](https://airbnb.io/lottie/#/supported-features)
-are supported in this port.
+This port supports the same [feature set as Lottie Android](https://airbnb.io/lottie/#/supported-features).
 
 ## Flutter Web
-Run the app with `flutter run -d Chrome --dart-define=FLUTTER_WEB_USE_SKIA=true --release`
+Run the app with `flutter run -d chrome --web-renderer canvaskit`
 
-See a preview here: https://xvrh.github.io/lottie-flutter/index.html
+See a preview here: https://xvrh.github.io/lottie-flutter-web/
 
 ## More examples
 See the `example` folder for more code samples of the various possibilities.

analysis_options.yaml

@@ -1,39 +1,29 @@
-include: package:pedantic/analysis_options.yaml
+include: package:flutter_lints/flutter.yaml
 analyzer:
-  errors:
   strong-mode:
     implicit-casts: false
     implicit-dynamic: false
 linter:
   rules:
-    avoid_renaming_method_parameters: true
-    avoid_returning_null_for_future: true
-    avoid_returning_null_for_void: true
-    avoid_returning_this: true
+    avoid_print: false
+
+    always_declare_return_types: true
+    avoid_dynamic_calls: true
+    avoid_escaping_inner_quotes: true
     avoid_setters_without_getters: true
-    await_only_futures: true
-    camel_case_types: true
-    cancel_subscriptions: true
+    cast_nullable_to_non_nullable: true
     close_sinks: true
-    constant_identifier_names: true
-    empty_statements: true
-    hash_and_equals: true
-    iterable_contains_unrelated_type: true
-    list_remove_unrelated_type: true
     no_adjacent_strings_in_list: true
-    non_constant_identifier_names: true
+    no_default_cases: true
+    omit_local_variable_types: true
     only_throw_errors: true
-    overridden_fields: true
-    prefer_inlined_adds: true
     prefer_interpolation_to_compose_strings: true
-    prefer_null_aware_operators: true
-    prefer_relative_imports: true
-    prefer_typing_uninitialized_variables: true
+    prefer_single_quotes: true
+    sort_child_properties_last: true
     sort_pub_dependencies: true
     test_types_in_equals: true
-    unnecessary_brace_in_string_interps: true
-    unnecessary_getters_setters: true
+    unawaited_futures: true
     unnecessary_parenthesis: true
     unnecessary_statements: true
-    use_function_type_syntax_for_parameters: true
-    void_checks: true
+    unsafe_html: true
+    use_raw_strings: true

example/README.md

@@ -6,9 +6,11 @@
 import 'package:flutter/material.dart';
 import 'package:lottie/lottie.dart';
 
-void main() => runApp(MyApp());
+void main() => runApp(const MyApp());
 
 class MyApp extends StatelessWidget {
+  const MyApp({Key? key}) : super(key: key);
+
   @override
   Widget build(BuildContext context) {
     return MaterialApp(

example/assets/Tests/AnimatedShadow.json

@@ -0,0 +1 @@
+{"v":"5.7.7","fr":29.9700012207031,"ip":0,"op":181.000007372281,"w":375,"h":375,"nm":"Square","ddd":0,"assets":[],"layers":[{"ddd":0,"ind":1,"ty":4,"nm":"Shape Layer 1","sr":1,"ks":{"o":{"a":0,"k":100,"ix":11},"r":{"a":0,"k":0,"ix":10},"p":{"a":0,"k":[187.5,187.5,0],"ix":2,"l":2},"a":{"a":0,"k":[0,0,0],"ix":1,"l":2},"s":{"a":0,"k":[100,100,100],"ix":6,"l":2}},"ao":0,"ef":[{"ty":25,"nm":"Drop Shadow2","np":8,"mn":"ADBE Drop Shadow","ix":1,"en":1,"ef":[{"ty":2,"nm":"Shadow Color","mn":"ADBE Drop Shadow-0001","ix":1,"v":{"a":1,"k":[{"i":{"x":[0.833],"y":[0.833]},"o":{"x":[0.167],"y":[0.167]},"t":0,"s":[0,0,0,1]},{"t":151.000006150356,"s":[0,0.371857702732,1,1]}],"ix":1}},{"ty":0,"nm":"Opacity","mn":"ADBE Drop Shadow-0002","ix":2,"v":{"a":1,"k":[{"i":{"x":[0.833],"y":[1]},"o":{"x":[0.167],"y":[0]},"t":0,"s":[127.5]},{"t":151.000006150356,"s":[127.5]}],"ix":2}},{"ty":0,"nm":"Direction","mn":"ADBE Drop Shadow-0003","ix":3,"v":{"a":1,"k":[{"i":{"x":[0.833],"y":[0.833]},"o":{"x":[0.167],"y":[0.167]},"t":0,"s":[0]},{"t":151.000006150356,"s":[360]}],"ix":3}},{"ty":0,"nm":"Distance","mn":"ADBE Drop Shadow-0004","ix":4,"v":{"a":1,"k":[{"i":{"x":[0.833],"y":[0.833]},"o":{"x":[0.167],"y":[0.167]},"t":0,"s":[10]},{"t":151.000006150356,"s":[15]}],"ix":4}},{"ty":0,"nm":"Softness","mn":"ADBE Drop Shadow-0005","ix":5,"v":{"a":1,"k":[{"i":{"x":[0.833],"y":[0.833]},"o":{"x":[0.167],"y":[0.167]},"t":0,"s":[20]},{"t":151.000006150356,"s":[50]}],"ix":5}},{"ty":7,"nm":"Shadow Only","mn":"ADBE Drop Shadow-0006","ix":6,"v":{"a":0,"k":0,"ix":6}}]}],"shapes":[{"ty":"gr","it":[{"ty":"rc","d":1,"s":{"a":0,"k":[217.641,217.641],"ix":2},"p":{"a":0,"k":[0,0],"ix":3},"r":{"a":0,"k":0,"ix":4},"nm":"Rectangle Path 1","mn":"ADBE Vector Shape - Rect","hd":false},{"ty":"fl","c":{"a":0,"k":[1,0,0,1],"ix":4},"o":{"a":0,"k":100,"ix":5},"r":1,"bm":0,"nm":"Fill 1","mn":"ADBE Vector Graphic - Fill","hd":false},{"ty":"tr","p":{"a":0,"k":[-4.68,-1.68],"ix":2},"a":{"a":0,"k":[0,0],"ix":1},"s":{"a":0,"k":[100,100],"ix":3},"r":{"a":0,"k":0,"ix":6},"o":{"a":0,"k":100,"ix":7},"sk":{"a":0,"k":0,"ix":4},"sa":{"a":0,"k":0,"ix":5},"nm":"Transform"}],"nm":"Rectangle 1","np":2,"cix":2,"bm":0,"ix":1,"mn":"ADBE Vector Group","hd":false}],"ip":0,"op":184.000007494474,"st":0,"bm":0}],"markers":[]}

example/assets/Tests/FillBlur.json

@@ -0,0 +1 @@
+{"v":"5.7.7","fr":29.9700012207031,"ip":0,"op":121.000004928431,"w":400,"h":400,"nm":"Comp 1","ddd":0,"assets":[],"layers":[{"ddd":0,"ind":1,"ty":4,"nm":"Shape Layer 1","sr":1,"ks":{"o":{"a":0,"k":100,"ix":11},"r":{"a":0,"k":0,"ix":10},"p":{"a":0,"k":[200,200,0],"ix":2,"l":2},"a":{"a":0,"k":[0,0,0],"ix":1,"l":2},"s":{"a":0,"k":[100,100,100],"ix":6,"l":2}},"ao":0,"ef":[{"ty":29,"nm":"Gaussian Blur2","np":5,"mn":"ADBE Gaussian Blur 2","ix":1,"en":1,"ef":[{"ty":0,"nm":"Blurriness","mn":"ADBE Gaussian Blur 2-0001","ix":1,"v":{"a":1,"k":[{"i":{"x":[0.833],"y":[0.833]},"o":{"x":[0.167],"y":[0.167]},"t":0,"s":[0]},{"t":24.00000097754,"s":[120.7]}],"ix":1}},{"ty":7,"nm":"Blur Dimensions","mn":"ADBE Gaussian Blur 2-0002","ix":2,"v":{"a":0,"k":1,"ix":2}},{"ty":7,"nm":"Repeat Edge Pixels","mn":"ADBE Gaussian Blur 2-0003","ix":3,"v":{"a":0,"k":0,"ix":3}}]},{"ty":5,"nm":"Bulge","np":9,"mn":"ADBE Bulge","ix":2,"en":1,"ef":[{"ty":0,"nm":"Horizontal Radius","mn":"ADBE Bulge-0001","ix":1,"v":{"a":0,"k":50,"ix":1}},{"ty":0,"nm":"Vertical Radius","mn":"ADBE Bulge-0002","ix":2,"v":{"a":0,"k":50,"ix":2}},{"ty":3,"nm":"Bulge Center","mn":"ADBE Bulge-0003","ix":3,"v":{"a":0,"k":[200,200],"ix":3}},{"ty":0,"nm":"Bulge Height","mn":"ADBE Bulge-0004","ix":4,"v":{"a":0,"k":1,"ix":4}},{"ty":0,"nm":"Taper Radius","mn":"ADBE Bulge-0005","ix":5,"v":{"a":0,"k":0,"ix":5}},{"ty":7,"nm":"Antialiasing (Best Qual Only)","mn":"ADBE Bulge-0006","ix":6,"v":{"a":0,"k":1,"ix":6}},{"ty":7,"nm":"Pinning","mn":"ADBE Bulge-0007","ix":7,"v":{"a":0,"k":0,"ix":7}}]}],"shapes":[{"ty":"gr","it":[{"ty":"rc","d":1,"s":{"a":0,"k":[274.975,274.975],"ix":2},"p":{"a":0,"k":[0,0],"ix":3},"r":{"a":0,"k":0,"ix":4},"nm":"Rectangle Path 1","mn":"ADBE Vector Shape - Rect","hd":false},{"ty":"tr","p":{"a":0,"k":[-4.513,7.487],"ix":2},"a":{"a":0,"k":[0,0],"ix":1},"s":{"a":0,"k":[100,100],"ix":3},"r":{"a":0,"k":0,"ix":6},"o":{"a":0,"k":100,"ix":7},"sk":{"a":0,"k":0,"ix":4},"sa":{"a":0,"k":0,"ix":5},"nm":"Transform"}],"nm":"Rectangle 1","np":1,"cix":2,"bm":0,"ix":1,"mn":"ADBE Vector Group","hd":false},{"ty":"fl","c":{"a":0,"k":[1,0,0,1],"ix":4},"o":{"a":0,"k":100,"ix":5},"r":1,"bm":0,"nm":"Fill 1","mn":"ADBE Vector Graphic - Fill","hd":false}],"ip":0,"op":121.000004928431,"st":0,"bm":0}],"markers":[]}

example/assets/Tests/GradientFillBlur.json

@@ -0,0 +1 @@
+{"v":"5.7.7","fr":29.9700012207031,"ip":0,"op":121.000004928431,"w":400,"h":400,"nm":"Comp 1","ddd":0,"assets":[],"layers":[{"ddd":0,"ind":1,"ty":4,"nm":"Shape Layer 1","sr":1,"ks":{"o":{"a":0,"k":100,"ix":11},"r":{"a":0,"k":0,"ix":10},"p":{"a":0,"k":[200,200,0],"ix":2,"l":2},"a":{"a":0,"k":[0,0,0],"ix":1,"l":2},"s":{"a":0,"k":[100,100,100],"ix":6,"l":2}},"ao":0,"ef":[{"ty":29,"nm":"Gaussian Blur2","np":5,"mn":"ADBE Gaussian Blur 2","ix":1,"en":1,"ef":[{"ty":0,"nm":"Blurriness","mn":"ADBE Gaussian Blur 2-0001","ix":1,"v":{"a":1,"k":[{"i":{"x":[0.833],"y":[0.833]},"o":{"x":[0.167],"y":[0.167]},"t":0,"s":[0]},{"t":24.00000097754,"s":[120.7]}],"ix":1}},{"ty":7,"nm":"Blur Dimensions","mn":"ADBE Gaussian Blur 2-0002","ix":2,"v":{"a":0,"k":1,"ix":2}},{"ty":7,"nm":"Repeat Edge Pixels","mn":"ADBE Gaussian Blur 2-0003","ix":3,"v":{"a":0,"k":0,"ix":3}}]},{"ty":5,"nm":"Bulge","np":9,"mn":"ADBE Bulge","ix":2,"en":1,"ef":[{"ty":0,"nm":"Horizontal Radius","mn":"ADBE Bulge-0001","ix":1,"v":{"a":0,"k":50,"ix":1}},{"ty":0,"nm":"Vertical Radius","mn":"ADBE Bulge-0002","ix":2,"v":{"a":0,"k":50,"ix":2}},{"ty":3,"nm":"Bulge Center","mn":"ADBE Bulge-0003","ix":3,"v":{"a":0,"k":[200,200],"ix":3}},{"ty":0,"nm":"Bulge Height","mn":"ADBE Bulge-0004","ix":4,"v":{"a":0,"k":1,"ix":4}},{"ty":0,"nm":"Taper Radius","mn":"ADBE Bulge-0005","ix":5,"v":{"a":0,"k":0,"ix":5}},{"ty":7,"nm":"Antialiasing (Best Qual Only)","mn":"ADBE Bulge-0006","ix":6,"v":{"a":0,"k":1,"ix":6}},{"ty":7,"nm":"Pinning","mn":"ADBE Bulge-0007","ix":7,"v":{"a":0,"k":0,"ix":7}}]}],"shapes":[{"ty":"gr","it":[{"ty":"rc","d":1,"s":{"a":0,"k":[274.975,274.975],"ix":2},"p":{"a":0,"k":[0,0],"ix":3},"r":{"a":0,"k":0,"ix":4},"nm":"Rectangle Path 1","mn":"ADBE Vector Shape - Rect","hd":false},{"ty":"tr","p":{"a":0,"k":[-4.513,7.487],"ix":2},"a":{"a":0,"k":[0,0],"ix":1},"s":{"a":0,"k":[100,100],"ix":3},"r":{"a":0,"k":0,"ix":6},"o":{"a":0,"k":100,"ix":7},"sk":{"a":0,"k":0,"ix":4},"sa":{"a":0,"k":0,"ix":5},"nm":"Transform"}],"nm":"Rectangle 1","np":1,"cix":2,"bm":0,"ix":1,"mn":"ADBE Vector Group","hd":false},{"ty":"gf","o":{"a":0,"k":100,"ix":10},"r":1,"bm":0,"g":{"p":3,"k":{"a":0,"k":[0,1,0,0,0.5,0.505,0,0.5,1,0.009,0,1],"ix":9}},"s":{"a":0,"k":[-125,0],"ix":5},"e":{"a":0,"k":[100,0],"ix":6},"t":1,"nm":"Gradient Fill 1","mn":"ADBE Vector Graphic - G-Fill","hd":false}],"ip":0,"op":121.000004928431,"st":0,"bm":0}],"markers":[]}

example/assets/Tests/GradientOpacityInterpolation.json

@@ -0,0 +1,87 @@
+{
+  "v": "5.7.1",
+  "fr": 60,
+  "ip": 0,
+  "op": 65,
+  "w": 1056,
+  "h": 1056,
+  "nm": "Animation",
+  "ddd": 0,
+  "assets": [],
+  "layers": [
+    {
+      "ddd": 0,
+      "ind": 1,
+      "ty": 4,
+      "nm": "Shape Layer 3",
+      "sr": 1,
+      "ks": {
+        "o": { "a": 0, "k": 100, "ix": 11 },
+        "r": { "a": 0, "k": 0, "ix": 10 },
+        "p": { "a": 0, "k": [528, 531, 0], "ix": 2 },
+        "a": { "a": 0, "k": [0, 0, 0], "ix": 1 },
+        "s": { "a": 0, "k": [147.368, 147.368, 100], "ix": 6 }
+      },
+      "ao": 0,
+      "shapes": [
+        {
+          "ty": "gr",
+          "it": [
+            {
+              "d": 1,
+              "ty": "el",
+              "s": { "a": 0, "k": [415, 415], "ix": 2 },
+              "p": { "a": 0, "k": [0, 0], "ix": 3 },
+              "nm": "Ellipse Path 1",
+              "mn": "ADBE Vector Shape - Ellipse",
+              "hd": false
+            },
+            {
+              "ty": "gf",
+              "o": { "a": 0, "k": 55, "ix": 10 },
+              "r": 1,
+              "bm": 0,
+              "g": {
+                "p": 3,
+                "k": {
+                  "a": 0,
+                  "k": [0, 0.969, 0.514, 0.745, 0.116, 0.984, 0.537, 0.373, 1, 1, 0.559, 0, 0.607, 0, 0.776, 0.5, 0.945, 1],
+                  "ix": 9
+                }
+              },
+              "s": { "a": 0, "k": [-206.344, -144.451], "ix": 5 },
+              "e": { "a": 0, "k": [173.147, 192.356], "ix": 6 },
+              "t": 1,
+              "nm": "Gradient Fill 9",
+              "mn": "ADBE Vector Graphic - G-Fill",
+              "hd": false
+            },
+            {
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example/assets/Tests/Rect4.json

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example/assets/Tests/Rect5.json

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example/assets/Tests/Rect6.json

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example/assets/Tests/Rect7.json

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example/assets/Tests/Rect9.json

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example/assets/Tests/StaticShadow.json

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example/assets/Tests/StrokeBlur.json

@@ -0,0 +1 @@
+{"v":"5.7.7","fr":29.9700012207031,"ip":0,"op":121.000004928431,"w":400,"h":400,"nm":"Comp 1","ddd":0,"assets":[],"layers":[{"ddd":0,"ind":1,"ty":4,"nm":"Shape Layer 1","sr":1,"ks":{"o":{"a":0,"k":100,"ix":11},"r":{"a":0,"k":0,"ix":10},"p":{"a":0,"k":[200,200,0],"ix":2,"l":2},"a":{"a":0,"k":[0,0,0],"ix":1,"l":2},"s":{"a":0,"k":[100,100,100],"ix":6,"l":2}},"ao":0,"ef":[{"ty":29,"nm":"Gaussian Blur2","np":5,"mn":"ADBE Gaussian Blur 2","ix":1,"en":1,"ef":[{"ty":0,"nm":"Blurriness","mn":"ADBE Gaussian Blur 2-0001","ix":1,"v":{"a":1,"k":[{"i":{"x":[0.833],"y":[0.833]},"o":{"x":[0.167],"y":[0.167]},"t":0,"s":[0]},{"t":24.00000097754,"s":[120.7]}],"ix":1}},{"ty":7,"nm":"Blur Dimensions","mn":"ADBE Gaussian Blur 2-0002","ix":2,"v":{"a":0,"k":1,"ix":2}},{"ty":7,"nm":"Repeat Edge Pixels","mn":"ADBE Gaussian Blur 2-0003","ix":3,"v":{"a":0,"k":0,"ix":3}}]},{"ty":5,"nm":"Bulge","np":9,"mn":"ADBE Bulge","ix":2,"en":1,"ef":[{"ty":0,"nm":"Horizontal Radius","mn":"ADBE Bulge-0001","ix":1,"v":{"a":0,"k":50,"ix":1}},{"ty":0,"nm":"Vertical Radius","mn":"ADBE Bulge-0002","ix":2,"v":{"a":0,"k":50,"ix":2}},{"ty":3,"nm":"Bulge Center","mn":"ADBE Bulge-0003","ix":3,"v":{"a":0,"k":[200,200],"ix":3}},{"ty":0,"nm":"Bulge Height","mn":"ADBE Bulge-0004","ix":4,"v":{"a":0,"k":1,"ix":4}},{"ty":0,"nm":"Taper Radius","mn":"ADBE Bulge-0005","ix":5,"v":{"a":0,"k":0,"ix":5}},{"ty":7,"nm":"Antialiasing (Best Qual Only)","mn":"ADBE Bulge-0006","ix":6,"v":{"a":0,"k":1,"ix":6}},{"ty":7,"nm":"Pinning","mn":"ADBE Bulge-0007","ix":7,"v":{"a":0,"k":0,"ix":7}}]}],"shapes":[{"ty":"gr","it":[{"ty":"rc","d":1,"s":{"a":0,"k":[274.975,274.975],"ix":2},"p":{"a":0,"k":[0,0],"ix":3},"r":{"a":0,"k":0,"ix":4},"nm":"Rectangle Path 1","mn":"ADBE Vector Shape - Rect","hd":false},{"ty":"tr","p":{"a":0,"k":[-4.513,7.487],"ix":2},"a":{"a":0,"k":[0,0],"ix":1},"s":{"a":0,"k":[100,100],"ix":3},"r":{"a":0,"k":0,"ix":6},"o":{"a":0,"k":100,"ix":7},"sk":{"a":0,"k":0,"ix":4},"sa":{"a":0,"k":0,"ix":5},"nm":"Transform"}],"nm":"Rectangle 1","np":1,"cix":2,"bm":0,"ix":1,"mn":"ADBE Vector Group","hd":false},{"ty":"st","c":{"a":0,"k":[1,0,0,1],"ix":3},"o":{"a":0,"k":100,"ix":4},"w":{"a":0,"k":46,"ix":5},"lc":1,"lj":1,"ml":4,"bm":0,"nm":"Stroke 1","mn":"ADBE Vector Graphic - Stroke","hd":false}],"ip":0,"op":121.000004928431,"st":0,"bm":0}],"markers":[]}

example/assets/Tests/TimeStretchPrecomp2.json

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+{
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+    "fr": 25,
+    "ip": 0,
+    "op": 200,
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+    "assets": [
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+                    "ind": 1,
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+                    "nm": "形状图层 14",
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+                                        "ix": 2
+                                    },
+                                    "nm": "路径 1",
+                                    "mn": "ADBE Vector Shape - Group",
+                                    "hd": false
+                                },
+                                {
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+                                    "c": {
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+                                    },
+                                    "r": 1,
+                                    "bm": 0,
+                                    "nm": "EditableColor#2",
+                                    "mn": "ADBE Vector Graphic - Fill",
+                                    "hd": false,
+                                    "ln": "2"
+                                },
+                                {
+                                    "ty": "tr",
+                                    "p": {
+                                        "a": 0,
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+                                        ],
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+                                    "s": {
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+                                            100
+                                        ],
+                                        "ix": 3
+                                    },
+                                    "r": {
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+                                        "k": 0,
+                                        "ix": 6
+                                    },
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+                                    },
+                                    "sk": {
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+                                        "k": 0,
+                                        "ix": 4
+                                    },
+                                    "sa": {
+                                        "a": 0,
+                                        "k": 0,
+                                        "ix": 5
+                                    },
+                                    "nm": "变换"
+                                }
+                            ],
+                            "nm": "矩形 1",
+                            "np": 2,
+                            "cix": 2,
+                            "bm": 0,
+                            "ix": 1,
+                            "mn": "ADBE Vector Group",
+                            "hd": false
+                        }
+                    ],
+                    "ip": 0,
+                    "op": 100,
+                    "st": 0,
+                    "bm": 0
+                }
+            ]
+        }
+    ],
+    "layers": [
+        {
+            "ddd": 0,
+            "ind": 1,
+            "ty": 0,
+            "nm": "测试2",
+            "refId": "comp_0",
+            "sr": 2,
+            "ks": {
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+                },
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+                    ],
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+                },
+                "s": {
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+                        100,
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+                    ],
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+                }
+            },
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+            "h": 720,
+            "ip": 0,
+            "op": 200,
+            "st": 0,
+            "bm": 0
+        }
+    ],
+    "markers": []
+}

example/assets/Tests/rect2.json

@@ -0,0 +1 @@
+{"assets":[],"layers":[{"ddd":0,"ind":0,"ty":4,"nm":"Shape Layer 1","parent":1,"ks":{"o":{"k":100},"r":{"k":0},"p":{"k":[100,100,0]},"a":{"k":[0,0,0]},"s":{"k":[100,100,100]}},"ao":0,"shapes":[{"ty":"gr","it":[{"ty":"rc","d":1,"s":{"k":[{"i":{"x":[0.667,0.667],"y":[1,1]},"o":{"x":[0.333,0.333],"y":[0,0]},"n":["0p667_1_0p333_0","0p667_1_0p333_0"],"t":0,"s":[85.714,85.714],"e":[52.714,52.714]},{"i":{"x":[0.667,0.667],"y":[1,1]},"o":{"x":[0.333,0.333],"y":[0,0]},"n":["0p667_1_0p333_0","0p667_1_0p333_0"],"t":16,"s":[52.714,52.714],"e":[85.714,85.714]},{"t":35}]},"p":{"k":[0,0]},"r":{"k":0},"nm":"Rectangle Path 1","mn":"ADBE Vector Shape - Rect"},{"ty":"st","c":{"k":[0,0,0,1]},"o":{"k":100},"w":{"k":14},"lc":1,"lj":1,"ml":4,"nm":"Stroke 1","mn":"ADBE Vector Graphic - Stroke"},{"ty":"tr","p":{"k":[2.198,1.099],"ix":2},"a":{"k":[0,0],"ix":1},"s":{"k":[100,100],"ix":3},"r":{"k":0,"ix":6},"o":{"k":100,"ix":7},"sk":{"k":0,"ix":4},"sa":{"k":0,"ix":5},"nm":"Transform"}],"nm":"Rectangle 1","np":2,"mn":"ADBE Vector Group"}],"ip":0,"op":36,"st":0,"bm":0,"sr":1},{"ddd":0,"ind":1,"ty":1,"nm":"White Solid 1","ks":{"o":{"k":100},"r":{"k":0},"p":{"k":[45,45,0]},"a":{"k":[100,100,0]},"s":{"k":[45,45,100]}},"ao":0,"sw":200,"sh":200,"sc":"#ffffff","ip":0,"op":36,"st":0,"bm":0,"sr":1}],"v":"4.5.4","ddd":0,"ip":0,"op":36,"fr":60,"w":90,"h":90}

example/ios/Flutter/Debug.xcconfig

@@ -1,2 +1,3 @@
+#include? "Pods/Target Support Files/Pods-Runner/Pods-Runner.debug.xcconfig"
 #include "Pods/Target Support Files/Pods-Runner/Pods-Runner.debug.xcconfig"
 #include "Generated.xcconfig"

example/ios/Flutter/Release.xcconfig

@@ -1,2 +1,3 @@
+#include? "Pods/Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"
 #include "Pods/Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"
 #include "Generated.xcconfig"

example/lib/examples/alert_dialog.dart

@@ -2,9 +2,11 @@ import 'package:flutter/material.dart';
 import 'package:flutter/scheduler.dart';
 import 'package:lottie/lottie.dart';
 
-void main() => runApp(App());
+void main() => runApp(const App());
 
 class App extends StatelessWidget {
+  const App({Key? key}) : super(key: key);
+
   @override
   Widget build(BuildContext context) {
     return MaterialApp(
@@ -23,7 +25,7 @@ class __PageState extends State<_Page> {
   void initState() {
     super.initState();
 
-    SchedulerBinding.instance.addPostFrameCallback((_) => _showLoader());
+    SchedulerBinding.instance!.addPostFrameCallback((_) => _showLoader());
   }
 
   void _showLoader() {
@@ -42,6 +44,6 @@ class __PageState extends State<_Page> {
 
   @override
   Widget build(BuildContext context) {
-    return Center();
+    return const Center();
   }
 }

example/lib/examples/animate_no_repeat.dart

@@ -2,11 +2,11 @@ import 'package:flutter/material.dart';
 import 'package:lottie/lottie.dart';
 
 void main() async {
-  runApp(App());
+  runApp(const App());
 }
 
 class App extends StatelessWidget {
-  const App({Key key}) : super(key: key);
+  const App({Key? key}) : super(key: key);
 
   @override
   Widget build(BuildContext context) {

example/lib/examples/animation_controller.dart

@@ -1,15 +1,17 @@
 import 'package:flutter/material.dart';
 import 'package:lottie/lottie.dart';
 
-void main() => runApp(MyApp());
+void main() => runApp(const MyApp());
 
 class MyApp extends StatefulWidget {
+  const MyApp({Key? key}) : super(key: key);
+
   @override
   _MyAppState createState() => _MyAppState();
 }
 
 class _MyAppState extends State<MyApp> with TickerProviderStateMixin {
-  AnimationController _controller;
+  late final AnimationController _controller;
 
   @override
   void initState() {

example/lib/examples/animation_full_control.dart

@@ -9,15 +9,17 @@ import 'package:lottie/lottie.dart';
 /// This works by creating an AnimationController instance and passing it
 /// to the Lottie widget.
 /// The AnimationController class has a rich API to run the animation in various ways.
-void main() => runApp(MyApp());
+void main() => runApp(const MyApp());
 
 class MyApp extends StatefulWidget {
+  const MyApp({Key? key}) : super(key: key);
+
   @override
   _MyAppState createState() => _MyAppState();
 }
 
 class _MyAppState extends State<MyApp> with TickerProviderStateMixin {
-  AnimationController _controller;
+  late final AnimationController _controller;
 
   @override
   void initState() {
@@ -43,7 +45,7 @@ class _MyAppState extends State<MyApp> with TickerProviderStateMixin {
     return MaterialApp(
       home: Scaffold(
         appBar: AppBar(
-          title: Text('Animation control'),
+          title: const Text('Animation control'),
         ),
         body: Column(
           children: <Widget>[
@@ -58,27 +60,27 @@ class _MyAppState extends State<MyApp> with TickerProviderStateMixin {
                 });
               },
             ),
-            Text('${_controller.value.toStringAsFixed(2)}'),
+            Text(_controller.value.toStringAsFixed(2)),
             Row(
               mainAxisAlignment: MainAxisAlignment.center,
               children: [
                 // Play backward
                 IconButton(
-                  icon: Icon(Icons.arrow_left),
+                  icon: const Icon(Icons.arrow_left),
                   onPressed: () {
                     _controller.reverse();
                   },
                 ),
                 // Pause
                 IconButton(
-                  icon: Icon(Icons.pause),
+                  icon: const Icon(Icons.pause),
                   onPressed: () {
                     _controller.stop();
                   },
                 ),
                 // Play forward
                 IconButton(
-                  icon: Icon(Icons.arrow_right),
+                  icon: const Icon(Icons.arrow_right),
                   onPressed: () {
                     _controller.forward();
                   },
@@ -86,8 +88,7 @@ class _MyAppState extends State<MyApp> with TickerProviderStateMixin {
               ],
             ),
             const SizedBox(height: 30),
-            RaisedButton(
-              child: Text('Loop between frames'),
+            ElevatedButton(
               onPressed: () {
                 // Loop between 2 specifics frames
 
@@ -97,9 +98,10 @@ class _MyAppState extends State<MyApp> with TickerProviderStateMixin {
                   min: start,
                   max: stop,
                   reverse: true,
-                  period: _controller.duration * (stop - start),
+                  period: _controller.duration! * (stop - start),
                 );
               },
+              child: const Text('Loop between frames'),
             ),
           ],
         ),

example/lib/examples/blur.dart

@@ -0,0 +1,30 @@
+import 'package:flutter/material.dart';
+import 'package:lottie/lottie.dart';
+
+void main() => runApp(const MyApp());
+
+class MyApp extends StatelessWidget {
+  const MyApp({Key? key}) : super(key: key);
+
+  @override
+  Widget build(BuildContext context) {
+    return MaterialApp(
+      home: Scaffold(
+        body: ListView(
+          children: [
+            Lottie.asset(
+              'assets/AndroidWave.json',
+              height: 300,
+              delegates: LottieDelegates(values: [
+                ValueDelegate.blurRadius(
+                  ['**'],
+                  value: 20,
+                ),
+              ]),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+}

example/lib/examples/custom_draw.dart

@@ -3,12 +3,14 @@ import 'package:flutter/services.dart';
 import 'package:flutter/widgets.dart';
 import 'package:lottie/lottie.dart';
 
-void main() => runApp(MyApp());
+void main() => runApp(const MyApp());
 
 class MyApp extends StatelessWidget {
+  const MyApp({Key? key}) : super(key: key);
+
   @override
   Widget build(BuildContext context) {
-    return MaterialApp(
+    return const MaterialApp(
       home: Scaffold(
         body: MyWidget(),
       ),
@@ -17,12 +19,14 @@ class MyApp extends StatelessWidget {
 }
 
 class MyWidget extends StatefulWidget {
+  const MyWidget({Key? key}) : super(key: key);
+
   @override
   _MyWidgetState createState() => _MyWidgetState();
 }
 
 class _MyWidgetState extends State<MyWidget> {
-  Future<LottieComposition> _composition;
+  late final Future<LottieComposition> _composition;
 
   @override
   void initState() {
@@ -46,7 +50,7 @@ class _MyWidgetState extends State<MyWidget> {
         if (composition != null) {
           return CustomDrawer(composition);
         } else {
-          return Center(child: CircularProgressIndicator());
+          return const Center(child: CircularProgressIndicator());
         }
       },
     );
@@ -57,13 +61,13 @@ class _MyWidgetState extends State<MyWidget> {
 class CustomDrawer extends StatelessWidget {
   final LottieComposition composition;
 
-  const CustomDrawer(this.composition, {Key key}) : super(key: key);
+  const CustomDrawer(this.composition, {Key? key}) : super(key: key);
 
   @override
   Widget build(BuildContext context) {
     return CustomPaint(
       painter: _Painter(composition),
-      size: Size(400, 400),
+      size: const Size(400, 400),
     );
   }
 }

example/lib/examples/custom_load.dart

@@ -3,12 +3,14 @@ import 'package:flutter/services.dart';
 import 'package:flutter/widgets.dart';
 import 'package:lottie/lottie.dart';
 
-void main() => runApp(MyApp());
+void main() => runApp(const MyApp());
 
 class MyApp extends StatelessWidget {
+  const MyApp({Key? key}) : super(key: key);
+
   @override
   Widget build(BuildContext context) {
-    return MaterialApp(
+    return const MaterialApp(
       home: Scaffold(
         body: MyWidget(),
       ),
@@ -18,12 +20,14 @@ class MyApp extends StatelessWidget {
 
 //--- example
 class MyWidget extends StatefulWidget {
+  const MyWidget({Key? key}) : super(key: key);
+
   @override
   _MyWidgetState createState() => _MyWidgetState();
 }
 
 class _MyWidgetState extends State<MyWidget> {
-  Future<LottieComposition> _composition;
+  late final Future<LottieComposition> _composition;
 
   @override
   void initState() {
@@ -46,7 +50,7 @@ class _MyWidgetState extends State<MyWidget> {
         if (composition != null) {
           return Lottie(composition: composition);
         } else {
-          return Center(child: CircularProgressIndicator());
+          return const Center(child: CircularProgressIndicator());
         }
       },
     );

example/lib/examples/drop_shadow.dart

@@ -0,0 +1,35 @@
+import 'package:flutter/material.dart';
+import 'package:lottie/lottie.dart';
+
+void main() => runApp(const MyApp());
+
+class MyApp extends StatelessWidget {
+  const MyApp({Key? key}) : super(key: key);
+
+  @override
+  Widget build(BuildContext context) {
+    return MaterialApp(
+      home: Scaffold(
+        body: ListView(
+          children: [
+            Lottie.asset(
+              'assets/Tests/Fill.json',
+              height: 300,
+              delegates: LottieDelegates(values: [
+                ValueDelegate.dropShadow(
+                  ['**'],
+                  value: const DropShadow(
+                    color: Colors.blue,
+                    direction: 140,
+                    distance: 60,
+                    radius: 10,
+                  ),
+                ),
+              ]),
+            ),
+          ],
+        ),
+      ),
+    );
+  }
+}

example/lib/examples/dynamic_properties.dart

@@ -4,11 +4,11 @@ import 'package:flutter_colorpicker/flutter_colorpicker.dart';
 import 'package:lottie/lottie.dart';
 
 void main() async {
-  runApp(App());
+  runApp(const App());
 }
 
 class App extends StatefulWidget {
-  const App({Key key}) : super(key: key);
+  const App({Key? key}) : super(key: key);
 
   @override
   _AppState createState() => _AppState();
@@ -33,7 +33,7 @@ class _AppState extends State<App> with TickerProviderStateMixin {
       home: Scaffold(
         backgroundColor: Colors.white,
         appBar: AppBar(
-          title: Text('Dynamic properties'),
+          title: const Text('Dynamic properties'),
         ),
         body: ListView(
           children: <Widget>[
@@ -50,7 +50,7 @@ class _AppState extends State<App> with TickerProviderStateMixin {
               value: _useDelegates,
               onChanged: (newValue) {
                 setState(() {
-                  _useDelegates = newValue;
+                  _useDelegates = newValue!;
                 });
               },
             ),
@@ -63,7 +63,7 @@ class _AppState extends State<App> with TickerProviderStateMixin {
               },
             ),
             Center(
-              child: Container(
+              child: SizedBox(
                 width: 500,
                 child: ColorPicker(
                   pickerColor: _color,

example/lib/examples/dynamic_text.dart

@@ -3,18 +3,18 @@ import 'package:flutter/material.dart';
 import 'package:lottie/lottie.dart';
 
 void main() async {
-  runApp(App());
+  runApp(const App());
 }
 
 class App extends StatefulWidget {
-  const App({Key key}) : super(key: key);
+  const App({Key? key}) : super(key: key);
 
   @override
   _AppState createState() => _AppState();
 }
 
 class _AppState extends State<App> with TickerProviderStateMixin {
-  TextEditingController _textController;
+  late final TextEditingController _textController;
 
   @override
   void initState() {
@@ -36,7 +36,7 @@ class _AppState extends State<App> with TickerProviderStateMixin {
       home: Scaffold(
         backgroundColor: Colors.white,
         appBar: AppBar(
-          title: Text('Dynamic text'),
+          title: const Text('Dynamic text'),
         ),
         body: Center(
           child: Column(
@@ -54,7 +54,7 @@ class _AppState extends State<App> with TickerProviderStateMixin {
                   ),
                 ),
               ),
-              Container(
+              SizedBox(
                 width: 300,
                 child: CupertinoTextField(
                   controller: _textController,

example/lib/examples/error_builder.dart

@@ -0,0 +1,31 @@
+import 'package:flutter/material.dart';
+import 'package:lottie/lottie.dart';
+
+void main() => runApp(const MyApp());
+
+class MyApp extends StatelessWidget {
+  const MyApp({Key? key}) : super(key: key);
+
+  @override
+  Widget build(BuildContext context) {
+    return MaterialApp(
+      home: Scaffold(
+        body: ListView(
+          children: [_Animation()],
+        ),
+      ),
+    );
+  }
+}
+
+class _Animation extends StatelessWidget {
+  @override
+  Widget build(BuildContext context) {
+    return Lottie.network(
+      'https://example.does.not.exist/lottie.json',
+      errorBuilder: (context, exception, stackTrace) {
+        return const Text('😢');
+      },
+    );
+  }
+}

example/lib/examples/examples.dart

@@ -1,9 +1,11 @@
 import 'package:flutter/material.dart';
 import 'package:lottie/lottie.dart';
 
-void main() => runApp(MyApp());
+void main() => runApp(const MyApp());
 
 class MyApp extends StatelessWidget {
+  const MyApp({Key? key}) : super(key: key);
+
   @override
   Widget build(BuildContext context) {
     return MaterialApp(

example/lib/examples/hide_after_complete.dart

@@ -2,18 +2,18 @@ import 'package:flutter/material.dart';
 import 'package:lottie/lottie.dart';
 
 void main() async {
-  runApp(App());
+  runApp(const App());
 }
 
 class App extends StatefulWidget {
-  const App({Key key}) : super(key: key);
+  const App({Key? key}) : super(key: key);
 
   @override
   _AppState createState() => _AppState();
 }
 
 class _AppState extends State<App> with TickerProviderStateMixin {
-  AnimationController _animationController;
+  late final AnimationController _animationController;
   bool _showAnimation = true;
 
   @override

example/lib/examples/markers.dart

@@ -5,18 +5,18 @@ import 'package:lottie/lottie.dart';
 /// It is based on this article for lottie-ios:
 /// https://medium.com/swlh/controlling-lottie-animation-with-markers-5e9035d94623
 void main() async {
-  runApp(App());
+  runApp(const App());
 }
 
 class App extends StatefulWidget {
-  const App({Key key}) : super(key: key);
+  const App({Key? key}) : super(key: key);
 
   @override
   _AppState createState() => _AppState();
 }
 
 class _AppState extends State<App> with TickerProviderStateMixin {
-  Future<LottieComposition> _composition;
+  late final Future<LottieComposition> _composition;
 
   @override
   void initState() {
@@ -30,14 +30,14 @@ class _AppState extends State<App> with TickerProviderStateMixin {
       theme: ThemeData.dark(),
       home: Scaffold(
         appBar: AppBar(
-          title: Text('Markers'),
+          title: const Text('Markers'),
         ),
         body: FutureBuilder<LottieComposition>(
           future: _composition,
           builder: (context, snapshot) {
-            if (snapshot.hasError) return ErrorWidget(snapshot.error);
-            if (!snapshot.hasData) return CircularProgressIndicator();
-            return _LottieDetails(snapshot.data);
+            if (snapshot.hasError) return ErrorWidget(snapshot.error!);
+            if (!snapshot.hasData) return const CircularProgressIndicator();
+            return _LottieDetails(snapshot.data!);
           },
         ),
       ),
@@ -48,7 +48,7 @@ class _AppState extends State<App> with TickerProviderStateMixin {
 class _LottieDetails extends StatefulWidget {
   final LottieComposition composition;
 
-  const _LottieDetails(this.composition, {Key key}) : super(key: key);
+  const _LottieDetails(this.composition, {Key? key}) : super(key: key);
 
   @override
   _LottieDetailsState createState() => _LottieDetailsState();
@@ -56,7 +56,7 @@ class _LottieDetails extends StatefulWidget {
 
 class _LottieDetailsState extends State<_LottieDetails>
     with TickerProviderStateMixin {
-  AnimationController _controller;
+  late final AnimationController _controller;
 
   @override
   void initState() {
@@ -80,24 +80,24 @@ class _LottieDetailsState extends State<_LottieDetails>
           height: 150,
         ),
         ListTile(
-          title: Text('Composition start frame'),
+          title: const Text('Composition start frame'),
           trailing: Text(widget.composition.startFrame.toStringAsFixed(1)),
         ),
         ListTile(
-          title: Text('Composition duration'),
+          title: const Text('Composition duration'),
           trailing: Text(widget.composition.durationFrames.toStringAsFixed(1)),
         ),
-        RaisedButton(
-          child: Text('touchDownEnd - touchUpCancel'),
+        ElevatedButton(
           onPressed: () => _playBetween('touchDownEnd', 'touchUpCancel'),
+          child: const Text('touchDownEnd - touchUpCancel'),
         ),
-        RaisedButton(
-          child: Text('touchDownStart - touchDownEnd'),
+        ElevatedButton(
           onPressed: () => _playBetween('touchDownStart', 'touchDownEnd'),
+          child: const Text('touchDownStart - touchDownEnd'),
         ),
-        RaisedButton(
-          child: Text('touchDownEnd - touchUpEnd'),
+        ElevatedButton(
           onPressed: () => _playBetween('touchDownEnd', 'touchUpEnd'),
+          child: const Text('touchDownEnd - touchUpEnd'),
         ),
         for (var marker in widget.composition.markers)
           ListTile(
@@ -112,8 +112,8 @@ class _LottieDetailsState extends State<_LottieDetails>
   }
 
   void _playBetween(String marker1, String marker2) {
-    var start = widget.composition.getMarker(marker1).start;
-    var end = widget.composition.getMarker(marker2).start;
+    var start = widget.composition.getMarker(marker1)!.start;
+    var end = widget.composition.getMarker(marker2)!.start;
 
     _controller.value = start;
     _controller.animateTo(end,

example/lib/examples/repeat.dart

@@ -0,0 +1,65 @@
+import 'package:flutter/material.dart';
+import 'package:lottie/lottie.dart';
+
+void main() => runApp(const MyApp());
+
+class MyApp extends StatefulWidget {
+  const MyApp({Key? key}) : super(key: key);
+
+  @override
+  _MyAppState createState() => _MyAppState();
+}
+
+class _MyAppState extends State<MyApp> with TickerProviderStateMixin {
+  late final AnimationController _controller;
+  int _repeatIndex = 0;
+
+  @override
+  void initState() {
+    super.initState();
+
+    _controller = AnimationController(vsync: this)
+      ..addStatusListener((status) {
+        if (status == AnimationStatus.completed) {
+          setState(() {
+            _repeatIndex++;
+          });
+          if (_repeatIndex < 5) {
+            _controller.reset();
+            _controller.forward();
+          }
+        }
+      });
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return MaterialApp(
+      home: Scaffold(
+        body: ListView(
+          children: [
+            Lottie.asset(
+              'assets/AndroidWave.json',
+              controller: _controller,
+              width: 150,
+              height: 150,
+              onLoaded: (composition) {
+                // Configure the AnimationController with the duration of the
+                // Lottie file and start the animation.
+                _controller.duration = composition.duration;
+                _controller.forward();
+              },
+            ),
+            Center(child: Text('Repeat: $_repeatIndex')),
+          ],
+        ),
+      ),
+    );
+  }
+
+  @override
+  void dispose() {
+    _controller.dispose();
+    super.dispose();
+  }
+}

example/lib/examples/run_once.dart

@@ -8,11 +8,11 @@ void main() async {
     ..level = Level.ALL
     ..onRecord.listen(print);
 
-  runApp(App());
+  runApp(const App());
 }
 
 class App extends StatefulWidget {
-  const App({Key key}) : super(key: key);
+  const App({Key? key}) : super(key: key);
 
   @override
   _AppState createState() => _AppState();
@@ -20,7 +20,7 @@ class App extends StatefulWidget {
 
 class _AppState extends State<App> with TickerProviderStateMixin {
   int _index = 0;
-  AnimationController _animationController;
+  late final AnimationController _animationController;
 
   @override
   void initState() {

example/lib/examples/save_frames.dart

@@ -7,15 +7,17 @@ import 'package:path/path.dart' as p;
 import 'package:path_provider/path_provider.dart';
 
 /// This example shows how to save the frame of an animation to files on disk.
-void main() => runApp(MyApp());
+void main() => runApp(const MyApp());
 
 class MyApp extends StatefulWidget {
+  const MyApp({Key? key}) : super(key: key);
+
   @override
   _MyAppState createState() => _MyAppState();
 }
 
 class _MyAppState extends State<MyApp> {
-  List<File> _frames;
+  List<File>? _frames;
 
   @override
   Widget build(BuildContext context) {
@@ -26,15 +28,15 @@ class _MyAppState extends State<MyApp> {
           child: Column(
             crossAxisAlignment: CrossAxisAlignment.stretch,
             children: [
-              RaisedButton(
-                child: Text('Export all frames'),
+              ElevatedButton(
                 onPressed: _export,
+                child: const Text('Export all frames'),
               ),
               if (_frames != null)
                 Expanded(
                   child: GridView.count(
                     crossAxisCount: 10,
-                    children: [..._frames.map((f) => Image.file(f))],
+                    children: [..._frames!.map((f) => Image.file(f))],
                   ),
                 )
             ],
@@ -51,7 +53,7 @@ class _MyAppState extends State<MyApp> {
     var frames = await exportFrames(
         composition, await _createTempDirectory('export-lottie'),
         progresses: [for (var i = 0.0; i <= 1; i += 0.1) i],
-        size: Size(50, 50));
+        size: const Size(50, 50));
 
     setState(() {
       _frames = frames;
@@ -60,7 +62,7 @@ class _MyAppState extends State<MyApp> {
 }
 
 Future<List<File>> exportFrames(LottieComposition composition, String directory,
-    {@required Size size, @required List<double> progresses}) async {
+    {required Size size, required List<double> progresses}) async {
   var drawable = LottieDrawable(composition);
 
   var frames = <File>[];
@@ -87,7 +89,7 @@ Future<ByteData> _toByteData(LottieDrawable drawable, Size size) async {
 
   var picture = pictureRecorder.endRecording();
   var image = await picture.toImage(size.width.toInt(), size.height.toInt());
-  return await image.toByteData(format: ImageByteFormat.png);
+  return (await image.toByteData(format: ImageByteFormat.png))!;
 }
 
 Future<String> _createTempDirectory(String folderName) async {

example/lib/examples/simple_dynamic_properties.dart

@@ -1,9 +1,11 @@
 import 'package:flutter/material.dart';
 import 'package:lottie/lottie.dart';
 
-void main() => runApp(MyApp());
+void main() => runApp(const MyApp());
 
 class MyApp extends StatelessWidget {
+  const MyApp({Key? key}) : super(key: key);
+
   @override
   Widget build(BuildContext context) {
     return MaterialApp(
@@ -35,7 +37,7 @@ class _Animation extends StatelessWidget {
           ),
           ValueDelegate.position(
             const ['Shape Layer 1', 'Rectangle', '**'],
-            relative: Offset(100, 200),
+            relative: const Offset(100, 200),
           ),
         ],
       ),

example/lib/main.dart

@@ -1,9 +1,11 @@
 import 'package:flutter/material.dart';
 import 'package:lottie/lottie.dart';
 
-void main() => runApp(MyApp());
+void main() => runApp(const MyApp());
 
 class MyApp extends StatelessWidget {
+  const MyApp({Key? key}) : super(key: key);
+
   @override
   Widget build(BuildContext context) {
     return MaterialApp(

example/lib/main_app.dart

@@ -4,49 +4,58 @@ import 'package:logging/logging.dart';
 import 'package:lottie/lottie.dart';
 import 'src/all_files.g.dart';
 
+final _logger = Logger('main_app');
+
 void main() {
   Logger.root
     ..level = Level.ALL
     ..onRecord.listen(print);
   Lottie.traceEnabled = true;
-  runApp(App());
+  runApp(const App());
 }
 
 class App extends StatelessWidget {
+  const App({Key? key}) : super(key: key);
+
   @override
   Widget build(BuildContext context) {
     return MaterialApp(
       //showPerformanceOverlay: true,
       home: Scaffold(
         appBar: AppBar(
-          title: Text('Lottie Flutter'),
+          title: const Text('Lottie Flutter'),
         ),
-        body: GridView.builder(
-          itemCount: files.length,
-          gridDelegate:
-              SliverGridDelegateWithFixedCrossAxisCount(crossAxisCount: 4),
-          itemBuilder: (context, index) {
-            var assetName = files[index];
-            return GestureDetector(
-              child: _Item(
-                child: Lottie.asset(
-                  assetName,
-                  frameBuilder: (context, child, composition) {
-                    return AnimatedOpacity(
-                      child: child,
-                      opacity: composition == null ? 0 : 1,
-                      duration: const Duration(seconds: 1),
-                      curve: Curves.easeOut,
-                    );
-                  },
+        body: Scrollbar(
+          child: GridView.builder(
+            itemCount: files.length,
+            gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount(
+                crossAxisCount: 4),
+            itemBuilder: (context, index) {
+              var assetName = files[index];
+              return GestureDetector(
+                onTap: () {
+                  Navigator.push(
+                      context,
+                      MaterialPageRoute<void>(
+                          builder: (context) => Detail(assetName)));
+                },
+                child: _Item(
+                  child: Lottie.asset(
+                    assetName,
+                    onWarning: (w) => _logger.info('$assetName - $w'),
+                    frameBuilder: (context, child, composition) {
+                      return AnimatedOpacity(
+                        opacity: composition == null ? 0 : 1,
+                        duration: const Duration(seconds: 1),
+                        curve: Curves.easeOut,
+                        child: child,
+                      );
+                    },
+                  ),
                 ),
-              ),
-              onTap: () {
-                Navigator.of(context).push(MaterialPageRoute<void>(
-                    builder: (context) => Detail(assetName)));
-              },
-            );
-          },
+              );
+            },
+          ),
         ),
       ),
     );
@@ -56,7 +65,7 @@ class App extends StatelessWidget {
 class _Item extends StatelessWidget {
   final Widget child;
 
-  const _Item({Key key, this.child}) : super(key: key);
+  const _Item({Key? key, required this.child}) : super(key: key);
 
   @override
   Widget build(BuildContext context) {
@@ -65,11 +74,11 @@ class _Item extends StatelessWidget {
       child: Container(
         decoration: BoxDecoration(
             color: Colors.white,
-            borderRadius: BorderRadius.all(Radius.circular(10)),
+            borderRadius: const BorderRadius.all(Radius.circular(10)),
             boxShadow: [
               BoxShadow(
                   color: Colors.black.withOpacity(0.1),
-                  offset: Offset(2, 2),
+                  offset: const Offset(2, 2),
                   blurRadius: 5)
             ]),
         child: child,
@@ -81,26 +90,18 @@ class _Item extends StatelessWidget {
 class Detail extends StatefulWidget {
   final String assetName;
 
-  const Detail(this.assetName, {Key key}) : super(key: key);
+  const Detail(this.assetName, {Key? key}) : super(key: key);
 
   @override
   _DetailState createState() => _DetailState();
 }
 
 class _DetailState extends State<Detail> with TickerProviderStateMixin {
-  AnimationController _controller;
-
-  @override
-  void initState() {
-    super.initState();
-
-    _controller = AnimationController(vsync: this);
-  }
+  late final _controller = AnimationController(vsync: this);
 
   @override
   void dispose() {
     _controller.dispose();
-
     super.dispose();
   }
 
@@ -108,7 +109,7 @@ class _DetailState extends State<Detail> with TickerProviderStateMixin {
   Widget build(BuildContext context) {
     return Scaffold(
       appBar: AppBar(
-        title: Text('${widget.assetName}'),
+        title: Text(widget.assetName),
       ),
       body: SingleChildScrollView(
         child: Column(

example/lib/sizing_example.dart

@@ -13,14 +13,14 @@ void main() async {
 class App extends StatelessWidget {
   final LottieComposition composition;
 
-  const App({Key key, this.composition}) : super(key: key);
+  const App({Key? key, required this.composition}) : super(key: key);
 
   @override
   Widget build(BuildContext context) {
     return MaterialApp(
       home: Scaffold(
         appBar: AppBar(
-          title: Text(''),
+          title: const Text(''),
         ),
         body: SingleChildScrollView(
           child: Center(
@@ -97,13 +97,13 @@ class App extends StatelessWidget {
 
 class _Lottie extends StatefulWidget {
   final LottieComposition composition;
-  final double width;
-  final double height;
-  final BoxFit fit;
-  final AlignmentGeometry alignment;
+  final double? width;
+  final double? height;
+  final BoxFit? fit;
+  final AlignmentGeometry? alignment;
 
   const _Lottie(this.composition,
-      {Key key, this.width, this.height, this.fit, this.alignment})
+      {Key? key, this.width, this.height, this.fit, this.alignment})
       : super(key: key);
 
   @override
@@ -111,7 +111,7 @@ class _Lottie extends StatefulWidget {
 }
 
 class __LottieState extends State<_Lottie> with TickerProviderStateMixin {
-  AnimationController _controller;
+  late AnimationController _controller;
 
   @override
   void initState() {

example/lib/src/all_files.g.dart

@@ -108,14 +108,17 @@ final files = [
   'assets/Tests/hd.json',
   'assets/Tests/map.zip',
   'assets/TwitterHeartButton.json',
-  'assets/_loading_indicator.json',
+  'assets/battery_optimizations.json',
   'assets/bluetoothscanning.json',
+  'assets/camera_change.json',
+  'assets/envelope.json',
   'assets/example_with_images/data.json',
   'assets/lf20_w2Afea.json',
   'assets/lottiefiles/100_percent.json',
+  'assets/lottiefiles/28861-connection-style-2.json',
+  'assets/lottiefiles/45668-arrow-with-light-passing-through.json',
   'assets/lottiefiles/Plane.json',
   'assets/lottiefiles/StreetByMorning.json',
-  'assets/lottiefiles/___.json',
   'assets/lottiefiles/a_mountain.json',
   'assets/lottiefiles/accept_arrows.json',
   'assets/lottiefiles/airbnb.json',
@@ -346,7 +349,9 @@ final files = [
   'assets/lottiefiles/yoga_carpet.json',
   'assets/lottiefiles/youtube_icon_reveal.json',
   'assets/playing.json',
-  'assets/weather/_hurricane.json',
+  'assets/spinning_carrousel.zip',
+  'assets/sticker.json',
+  'assets/tent.json',
   'assets/weather/fog.json',
   'assets/weather/hurricane.json',
   'assets/weather/thunder-storm.json',

example/lib/tests/airbnb.dart

@@ -2,18 +2,18 @@ import 'package:flutter/material.dart';
 import 'package:lottie/lottie.dart';
 
 void main() async {
-  runApp(App());
+  runApp(const App());
 }
 
 class App extends StatelessWidget {
-  const App({Key key}) : super(key: key);
+  const App({Key? key}) : super(key: key);
 
   @override
   Widget build(BuildContext context) {
     return MaterialApp(
       home: Scaffold(
         appBar: AppBar(
-          title: Text(''),
+          title: const Text(''),
         ),
         body: SingleChildScrollView(
           child: Center(

example/lib/tests/we_accept.dart

@@ -2,22 +2,23 @@ import 'package:flutter/material.dart';
 import 'package:lottie/lottie.dart';
 
 void main() async {
-  runApp(App());
+  runApp(const App());
 }
 
 class App extends StatelessWidget {
-  const App({Key key}) : super(key: key);
+  const App({Key? key}) : super(key: key);
 
   @override
   Widget build(BuildContext context) {
     return MaterialApp(
       home: Scaffold(
         appBar: AppBar(
-          title: Text(''),
+          title: const Text(''),
         ),
         body: GridView(
-          gridDelegate:
-              SliverGridDelegateWithFixedCrossAxisCount(crossAxisCount: 4),
+          gridDelegate: const SliverGridDelegateWithFixedCrossAxisCount(
+            crossAxisCount: 4,
+          ),
           children: [
             Lottie.asset(
               'assets/Tests/WeAccept.json',

example/macos/Flutter/Flutter-Debug.xcconfig

@@ -1,2 +1,3 @@
+#include? "Pods/Target Support Files/Pods-Runner/Pods-Runner.debug.xcconfig"
 #include "Pods/Target Support Files/Pods-Runner/Pods-Runner.debug.xcconfig"
 #include "ephemeral/Flutter-Generated.xcconfig"

example/macos/Flutter/Flutter-Release.xcconfig

@@ -1,2 +1,3 @@
+#include? "Pods/Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"
 #include "Pods/Target Support Files/Pods-Runner/Pods-Runner.release.xcconfig"
 #include "ephemeral/Flutter-Generated.xcconfig"

example/macos/Podfile

@@ -9,74 +9,32 @@ project 'Runner', {
   'Release' => :release,
 }
 
-def parse_KV_file(file, separator='=')
-  file_abs_path = File.expand_path(file)
-  if !File.exists? file_abs_path
-    return [];
+def flutter_root
+  generated_xcode_build_settings_path = File.expand_path(File.join('..', 'Flutter', 'ephemeral', 'Flutter-Generated.xcconfig'), __FILE__)
+  unless File.exist?(generated_xcode_build_settings_path)
+    raise "#{generated_xcode_build_settings_path} must exist. If you're running pod install manually, make sure \"flutter pub get\" is executed first"
   end
-  pods_ary = []
-  skip_line_start_symbols = ["#", "/"]
-  File.foreach(file_abs_path) { |line|
-      next if skip_line_start_symbols.any? { |symbol| line =~ /^\s*#{symbol}/ }
-      plugin = line.split(pattern=separator)
-      if plugin.length == 2
-        podname = plugin[0].strip()
-        path = plugin[1].strip()
-        podpath = File.expand_path("#{path}", file_abs_path)
-        pods_ary.push({:name => podname, :path => podpath});
-      else
-        puts "Invalid plugin specification: #{line}"
-      end
-  }
-  return pods_ary
+
+  File.foreach(generated_xcode_build_settings_path) do |line|
+    matches = line.match(/FLUTTER_ROOT\=(.*)/)
+    return matches[1].strip if matches
+  end
+  raise "FLUTTER_ROOT not found in #{generated_xcode_build_settings_path}. Try deleting Flutter-Generated.xcconfig, then run \"flutter pub get\""
 end
 
-def pubspec_supports_macos(file)
-  file_abs_path = File.expand_path(file)
-  if !File.exists? file_abs_path
-    return false;
-  end
-  File.foreach(file_abs_path) { |line|
-    return true if line =~ /^\s*macos:/
-  }
-  return false
-end
+require File.expand_path(File.join('packages', 'flutter_tools', 'bin', 'podhelper'), flutter_root)
+
+flutter_macos_podfile_setup
 
 target 'Runner' do
   use_frameworks!
   use_modular_headers!
 
-  # Prepare symlinks folder. We use symlinks to avoid having Podfile.lock
-  # referring to absolute paths on developers' machines.
-  ephemeral_dir = File.join('Flutter', 'ephemeral')
-  symlink_dir = File.join(ephemeral_dir, '.symlinks')
-  symlink_plugins_dir = File.join(symlink_dir, 'plugins')
-  system("rm -rf #{symlink_dir}")
-  system("mkdir -p #{symlink_plugins_dir}")
-
-  # Flutter Pods
-  generated_xcconfig = parse_KV_file(File.join(ephemeral_dir, 'Flutter-Generated.xcconfig'))
-  if generated_xcconfig.empty?
-    puts "Flutter-Generated.xcconfig must exist. If you're running pod install manually, make sure flutter packages get is executed first."
-  end
-  generated_xcconfig.map { |p|
-    if p[:name] == 'FLUTTER_FRAMEWORK_DIR'
-      symlink = File.join(symlink_dir, 'flutter')
-      File.symlink(File.dirname(p[:path]), symlink)
-      pod 'FlutterMacOS', :path => File.join(symlink, File.basename(p[:path]))
-    end
-  }
-
-  # Plugin Pods
-  plugin_pods = parse_KV_file('../.flutter-plugins')
-  plugin_pods.map { |p|
-    symlink = File.join(symlink_plugins_dir, p[:name])
-    File.symlink(p[:path], symlink)
-    if pubspec_supports_macos(File.join(symlink, 'pubspec.yaml'))
-      pod p[:name], :path => File.join(symlink, 'macos')
-    end
-  }
+  flutter_install_all_macos_pods File.dirname(File.realpath(__FILE__))
 end
 
-# Prevent Cocoapods from embedding a second Flutter framework and causing an error with the new Xcode build system.
-install! 'cocoapods', :disable_input_output_paths => true
+post_install do |installer|
+  installer.pods_project.targets.each do |target|
+    flutter_additional_macos_build_settings(target)
+  end
+end

example/macos/Podfile.lock

@@ -1,27 +1,22 @@
 PODS:
   - FlutterMacOS (1.0.0)
-  - path_provider (0.0.1)
   - path_provider_macos (0.0.1):
     - FlutterMacOS
 
 DEPENDENCIES:
-  - FlutterMacOS (from `Flutter/ephemeral/.symlinks/flutter/darwin-x64-profile`)
-  - path_provider (from `Flutter/ephemeral/.symlinks/plugins/path_provider/macos`)
+  - FlutterMacOS (from `Flutter/ephemeral`)
   - path_provider_macos (from `Flutter/ephemeral/.symlinks/plugins/path_provider_macos/macos`)
 
 EXTERNAL SOURCES:
   FlutterMacOS:
-    :path: Flutter/ephemeral/.symlinks/flutter/darwin-x64-profile
-  path_provider:
-    :path: Flutter/ephemeral/.symlinks/plugins/path_provider/macos
+    :path: Flutter/ephemeral
   path_provider_macos:
     :path: Flutter/ephemeral/.symlinks/plugins/path_provider_macos/macos
 
 SPEC CHECKSUMS:
-  FlutterMacOS: 15bea8a44d2fa024068daa0140371c020b4b6ff9
-  path_provider: e0848572d1d38b9a7dd099e79cf83f5b7e2cde9f
+  FlutterMacOS: 57701585bf7de1b3fc2bb61f6378d73bbdea8424
   path_provider_macos: a0a3fd666cb7cd0448e936fb4abad4052961002b
 
-PODFILE CHECKSUM: d8ba9b3e9e93c62c74a660b46c6fcb09f03991a7
+PODFILE CHECKSUM: 6eac6b3292e5142cfc23bdeb71848a40ec51c14c
 
-COCOAPODS: 1.9.1
+COCOAPODS: 1.10.1

example/macos/Runner.xcodeproj/project.pbxproj

@@ -26,10 +26,6 @@
 		33CC10F32044A3C60003C045 /* Assets.xcassets in Resources */ = {isa = PBXBuildFile; fileRef = 33CC10F22044A3C60003C045 /* Assets.xcassets */; };
 		33CC10F62044A3C60003C045 /* MainMenu.xib in Resources */ = {isa = PBXBuildFile; fileRef = 33CC10F42044A3C60003C045 /* MainMenu.xib */; };
 		33CC11132044BFA00003C045 /* MainFlutterWindow.swift in Sources */ = {isa = PBXBuildFile; fileRef = 33CC11122044BFA00003C045 /* MainFlutterWindow.swift */; };
-		33D1A10422148B71006C7A3E /* FlutterMacOS.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 33D1A10322148B71006C7A3E /* FlutterMacOS.framework */; };
-		33D1A10522148B93006C7A3E /* FlutterMacOS.framework in Bundle Framework */ = {isa = PBXBuildFile; fileRef = 33D1A10322148B71006C7A3E /* FlutterMacOS.framework */; settings = {ATTRIBUTES = (CodeSignOnCopy, RemoveHeadersOnCopy, ); }; };
-		D73912F022F37F9E000D13A0 /* App.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = D73912EF22F37F9E000D13A0 /* App.framework */; };
-		D73912F222F3801D000D13A0 /* App.framework in Bundle Framework */ = {isa = PBXBuildFile; fileRef = D73912EF22F37F9E000D13A0 /* App.framework */; settings = {ATTRIBUTES = (CodeSignOnCopy, RemoveHeadersOnCopy, ); }; };
 		F03CC91740A974D36C2A6384 /* Pods_Runner.framework in Frameworks */ = {isa = PBXBuildFile; fileRef = 0BC6FF5FCD90624533CC60DB /* Pods_Runner.framework */; };
 /* End PBXBuildFile section */
 
@@ -50,8 +46,6 @@
 			dstPath = "";
 			dstSubfolderSpec = 10;
 			files = (
-				D73912F222F3801D000D13A0 /* App.framework in Bundle Framework */,
-				33D1A10522148B93006C7A3E /* FlutterMacOS.framework in Bundle Framework */,
 			);
 			name = "Bundle Framework";
 			runOnlyForDeploymentPostprocessing = 0;
@@ -73,14 +67,12 @@
 		33CEB47222A05771004F2AC0 /* Flutter-Debug.xcconfig */ = {isa = PBXFileReference; lastKnownFileType = text.xcconfig; path = "Flutter-Debug.xcconfig"; sourceTree = "<group>"; };
 		33CEB47422A05771004F2AC0 /* Flutter-Release.xcconfig */ = {isa = PBXFileReference; lastKnownFileType = text.xcconfig; path = "Flutter-Release.xcconfig"; sourceTree = "<group>"; };
 		33CEB47722A0578A004F2AC0 /* Flutter-Generated.xcconfig */ = {isa = PBXFileReference; lastKnownFileType = text.xcconfig; name = "Flutter-Generated.xcconfig"; path = "ephemeral/Flutter-Generated.xcconfig"; sourceTree = "<group>"; };
-		33D1A10322148B71006C7A3E /* FlutterMacOS.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = FlutterMacOS.framework; path = Flutter/ephemeral/FlutterMacOS.framework; sourceTree = SOURCE_ROOT; };
 		33E51913231747F40026EE4D /* DebugProfile.entitlements */ = {isa = PBXFileReference; lastKnownFileType = text.plist.entitlements; path = DebugProfile.entitlements; sourceTree = "<group>"; };
 		33E51914231749380026EE4D /* Release.entitlements */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.plist.entitlements; path = Release.entitlements; sourceTree = "<group>"; };
 		33E5194F232828860026EE4D /* AppInfo.xcconfig */ = {isa = PBXFileReference; lastKnownFileType = text.xcconfig; path = AppInfo.xcconfig; sourceTree = "<group>"; };
 		5B4C0E87024EC2686CA05E23 /* Pods-Runner.profile.xcconfig */ = {isa = PBXFileReference; includeInIndex = 1; lastKnownFileType = text.xcconfig; name = "Pods-Runner.profile.xcconfig"; path = "Target Support Files/Pods-Runner/Pods-Runner.profile.xcconfig"; sourceTree = "<group>"; };
 		7AFA3C8E1D35360C0083082E /* Release.xcconfig */ = {isa = PBXFileReference; lastKnownFileType = text.xcconfig; path = Release.xcconfig; sourceTree = "<group>"; };
 		9740EEB21CF90195004384FC /* Debug.xcconfig */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = text.xcconfig; path = Debug.xcconfig; sourceTree = "<group>"; };
-		D73912EF22F37F9E000D13A0 /* App.framework */ = {isa = PBXFileReference; lastKnownFileType = wrapper.framework; name = App.framework; path = Flutter/ephemeral/App.framework; sourceTree = SOURCE_ROOT; };
 /* End PBXFileReference section */
 
 /* Begin PBXFrameworksBuildPhase section */
@@ -88,8 +80,6 @@
 			isa = PBXFrameworksBuildPhase;
 			buildActionMask = 2147483647;
 			files = (
-				D73912F022F37F9E000D13A0 /* App.framework in Frameworks */,
-				33D1A10422148B71006C7A3E /* FlutterMacOS.framework in Frameworks */,
 				F03CC91740A974D36C2A6384 /* Pods_Runner.framework in Frameworks */,
 			);
 			runOnlyForDeploymentPostprocessing = 0;
@@ -145,8 +135,6 @@
 				33CEB47222A05771004F2AC0 /* Flutter-Debug.xcconfig */,
 				33CEB47422A05771004F2AC0 /* Flutter-Release.xcconfig */,
 				33CEB47722A0578A004F2AC0 /* Flutter-Generated.xcconfig */,
-				D73912EF22F37F9E000D13A0 /* App.framework */,
-				33D1A10322148B71006C7A3E /* FlutterMacOS.framework */,
 			);
 			path = Flutter;
 			sourceTree = "<group>";
@@ -281,7 +269,7 @@
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 			shellPath = /bin/sh;
-			shellScript = "echo \"$PRODUCT_NAME.app\" > \"$PROJECT_DIR\"/Flutter/ephemeral/.app_filename\n";
+			shellScript = "echo \"$PRODUCT_NAME.app\" > \"$PROJECT_DIR\"/Flutter/ephemeral/.app_filename && \"$FLUTTER_ROOT\"/packages/flutter_tools/bin/macos_assemble.sh embed\n";
 		};
 		33CC111E2044C6BF0003C045 /* ShellScript */ = {
 			isa = PBXShellScriptBuildPhase;
@@ -330,10 +318,13 @@
 			buildActionMask = 2147483647;
 			files = (
 			);
-			inputFileListPaths = (
+			inputPaths = (
+				"${PODS_ROOT}/Target Support Files/Pods-Runner/Pods-Runner-frameworks.sh",
+				"${BUILT_PRODUCTS_DIR}/path_provider_macos/path_provider_macos.framework",
 			);
 			name = "[CP] Embed Pods Frameworks";
-			outputFileListPaths = (
+			outputPaths = (
+				"${TARGET_BUILD_DIR}/${FRAMEWORKS_FOLDER_PATH}/path_provider_macos.framework",
 			);
 			runOnlyForDeploymentPostprocessing = 0;
 			shellPath = /bin/sh;

example/pubspec.lock

@@ -7,84 +7,77 @@ packages:
       name: archive
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.13"
-  args:
-    dependency: transitive
-    description:
-      name: args
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "1.6.0"
+    version: "3.1.2"
   async:
     dependency: transitive
     description:
       name: async
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.4.2"
+    version: "2.5.0"
   boolean_selector:
     dependency: transitive
     description:
       name: boolean_selector
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.0"
+    version: "2.1.0"
   characters:
     dependency: transitive
     description:
       name: characters
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.0"
+    version: "1.1.0"
   charcode:
     dependency: transitive
     description:
       name: charcode
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.3"
+    version: "1.2.0"
   clock:
     dependency: transitive
     description:
       name: clock
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.1"
+    version: "1.1.0"
   collection:
     dependency: transitive
     description:
       name: collection
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.14.13"
-  convert:
-    dependency: transitive
-    description:
-      name: convert
-      url: "https://pub.dartlang.org"
-    source: hosted
-    version: "2.1.1"
+    version: "1.15.0"
   crypto:
     dependency: transitive
     description:
       name: crypto
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.1.5"
+    version: "3.0.1"
   fake_async:
     dependency: transitive
     description:
       name: fake_async
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.0"
+    version: "1.2.0"
+  ffi:
+    dependency: transitive
+    description:
+      name: ffi
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.1.2"
   file:
     dependency: transitive
     description:
       name: file
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "5.2.1"
+    version: "6.1.2"
   flutter:
     dependency: "direct main"
     description: flutter
@@ -96,7 +89,14 @@ packages:
       name: flutter_colorpicker
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.3.4"
+    version: "0.5.0"
+  flutter_lints:
+    dependency: "direct dev"
+    description:
+      name: flutter_lints
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.0.3"
   flutter_test:
     dependency: "direct dev"
     description: flutter
@@ -108,119 +108,126 @@ packages:
       name: golden_toolkit
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.6.0"
+    version: "0.9.0"
   http:
     dependency: "direct main"
     description:
       name: http
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.12.2"
+    version: "0.13.3"
   http_parser:
     dependency: transitive
     description:
       name: http_parser
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "3.1.4"
-  intl:
+    version: "4.0.0"
+  lints:
     dependency: transitive
     description:
-      name: intl
+      name: lints
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.16.1"
+    version: "1.0.1"
   logging:
-    dependency: transitive
+    dependency: "direct main"
     description:
       name: logging
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.11.4"
+    version: "1.0.1"
   lottie:
     dependency: "direct main"
     description:
       path: ".."
       relative: true
     source: path
-    version: "0.6.0"
+    version: "1.2.0"
   matcher:
     dependency: transitive
     description:
       name: matcher
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.12.8"
+    version: "0.12.10"
   meta:
     dependency: transitive
     description:
       name: meta
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.8"
+    version: "1.3.0"
   path:
     dependency: transitive
     description:
       name: path
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.7.0"
+    version: "1.8.0"
   path_provider:
     dependency: "direct main"
     description:
       name: path_provider
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.6.14"
+    version: "2.0.2"
   path_provider_linux:
     dependency: transitive
     description:
       name: path_provider_linux
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.0.1+2"
+    version: "2.0.0"
   path_provider_macos:
     dependency: transitive
     description:
       name: path_provider_macos
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.0.4+3"
+    version: "2.0.0"
   path_provider_platform_interface:
     dependency: transitive
     description:
       name: path_provider_platform_interface
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.3"
+    version: "2.0.1"
+  path_provider_windows:
+    dependency: transitive
+    description:
+      name: path_provider_windows
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.1"
   pedantic:
     dependency: transitive
     description:
       name: pedantic
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.9.0"
+    version: "1.11.1"
   platform:
     dependency: transitive
     description:
       name: platform
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.2.1"
+    version: "3.0.0"
   plugin_platform_interface:
     dependency: transitive
     description:
       name: plugin_platform_interface
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.2"
+    version: "2.0.0"
   process:
     dependency: transitive
     description:
       name: process
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "3.0.13"
+    version: "4.2.1"
   sky_engine:
     dependency: transitive
     description: flutter
@@ -232,63 +239,70 @@ packages:
       name: source_span
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.7.0"
+    version: "1.8.1"
   stack_trace:
     dependency: transitive
     description:
       name: stack_trace
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.9.5"
+    version: "1.10.0"
   stream_channel:
     dependency: transitive
     description:
       name: stream_channel
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.0"
+    version: "2.1.0"
   string_scanner:
     dependency: transitive
     description:
       name: string_scanner
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.0.5"
+    version: "1.1.0"
   term_glyph:
     dependency: transitive
     description:
       name: term_glyph
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.1.0"
+    version: "1.2.0"
   test_api:
     dependency: transitive
     description:
       name: test_api
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.2.17"
+    version: "0.3.0"
   typed_data:
     dependency: transitive
     description:
       name: typed_data
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "1.2.0"
+    version: "1.3.0"
   vector_math:
     dependency: transitive
     description:
       name: vector_math
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "2.0.8"
+    version: "2.1.0"
+  win32:
+    dependency: transitive
+    description:
+      name: win32
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.2.5"
   xdg_directories:
     dependency: transitive
     description:
       name: xdg_directories
       url: "https://pub.dartlang.org"
     source: hosted
-    version: "0.1.0"
+    version: "0.2.0"
 sdks:
-  dart: ">=2.9.0-14.0.dev <3.0.0"
-  flutter: ">=1.12.13+hotfix.5 <2.0.0"
+  dart: ">=2.13.0 <3.0.0"
+  flutter: ">=1.20.0"

example/pubspec.yaml

@@ -1,20 +1,22 @@
 name: lottie_example
 description: A sample app for the Lottie player
-version: 0.0.1
+publish_to: none
 
 environment:
-  sdk: ">=2.7.0 <3.0.0"
+  sdk: ">=2.12.0-0 <3.0.0"
 
 dependencies:
   flutter:
     sdk: flutter
+  flutter_colorpicker:
+  http:
+  logging:
   lottie:
     path: ../
-  flutter_colorpicker:
   path_provider:
-  http:
 
 dev_dependencies:
+  flutter_lints:
   flutter_test:
     sdk: flutter
   golden_toolkit:
@@ -31,6 +33,7 @@ flutter:
     - assets/lottiefiles/
     - assets/Mobilo/
     - assets/Tests/
+    - assets/Tests/images/
     - assets/Logo/
     - assets/Images/
     - assets/Images/WeAccept/
@@ -59,4 +62,4 @@ flutter:
         - asset: assets/fonts/Roboto.ttf
     - family: Noto Emoji
       fonts:
-        - asset: assets/fonts/NotoEmoji-Regular.ttf
+        - asset: assets/fonts/Noto-Emoji.ttf

example/test/flutter_test_config.dart

@@ -1,7 +0,0 @@
-import 'dart:async';
-import 'package:golden_toolkit/golden_toolkit.dart';
-
-Future<void> main(FutureOr<void> Function() testMain) async {
-  await loadAppFonts();
-  return testMain();
-}