Use a default value for ShapeTrimPathType (#272)

Fixes #270

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

@@ -10,11 +10,11 @@ jobs:
     name: Flutter analyze
     strategy:
       matrix:
-        flutter: ['beta']
+        flutter: ['stable']
     runs-on: macos-latest
     steps:
       - uses: actions/checkout@v2
-      - uses: subosito/flutter-action@v1
+      - uses: subosito/flutter-action@v2
         with:
           channel: ${{ matrix.flutter }}
       - run: flutter doctor
@@ -22,8 +22,8 @@ jobs:
       - run: flutter pub get
         working-directory: example
       - run: flutter analyze
-      - run: flutter test test # https://github.com/flutter/flutter/issues/20907
-      - run: flutter test test
+      - run: flutter test
+      - run: flutter test
         working-directory: example
       - run: flutter pub run tool/prepare_submit.dart
       - name: "check for uncommitted changes"
@@ -34,14 +34,13 @@ jobs:
               && exit 1)
         shell: bash
   build_web_version:
-    name: Check that the web version compile
+    name: Check that the web version can compile
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-      - uses: subosito/flutter-action@v1
+      - uses: subosito/flutter-action@v2
         with:
-          channel: 'beta'
-      - run: flutter config --enable-web
+          channel: 'stable'
       - run: flutter precache web
       - run: flutter pub get
         working-directory: example

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

@@ -8,17 +8,16 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-      - uses: subosito/flutter-action@v1
+      - uses: subosito/flutter-action@v2
         with:
-          channel: 'beta'
+          channel: 'stable'
       - run: flutter pub get
       - run: flutter pub run tool/publish/comment_dependency_overrides.dart
       - run: flutter pub get
       - 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 }}",

.gitignore

@@ -3,6 +3,7 @@ _*
 
 !.gitignore
 !.github
+!.pubignore
 
 **/failures/*.png
 

.pubignore

@@ -0,0 +1,15 @@
+.dart_tool/
+.packages
+build/
+doc/api/
+*.iml
+_*
+.*
+**/failures/*.png
+test/golden/
+test/goldens/
+example/assets/
+example/android/
+example/ios/
+example/macos/
+example/web/

CHANGELOG.md

@@ -1,22 +1,174 @@
-## [1.0.1]
+## 2.3.1
+- Fix an assertion for null `ShapeTrimPathType.type`.
+
+## 2.3.0
+- Fixed a failed assertion (`dirty: is not true`) when calling `setState` inside `onLoaded` callback.
+- Update point text y offset
+- Makes static compositions not animate by default
+
+## 2.2.0
+Apply the latest fixes from Lottie-Android:
+
+- Overhaul text layout
+- Fix rounded corners modifying already rounded corners
+- Support box position in Document Data
+- Allow interpolating between gradients with different opacity stops
+- Add support for gradient opacity stops
+
+## 2.1.0
+- Improve the cache to ensure that there is not an empty frame each time we load an animation.  
+  The method `AssetLottie('anim.json').load()` returns a `SynchronousFuture` if it has been loaded previously.
+- Expose the `LottieCache` singleton.
+  It allows to change the cache behaviour and clear the entries.
+
+```dart
+void main() {
+  Lottie.cache.maximumSize = 10;
+  Lottie.cache.clear();
+  Lottie.cache.evict(NetworkLottie('https://lottie.com/anim.json'));
+}
+```
+
+## 2.0.0
+- **Breaking change**: the lottie widget will be smaller if it relies on the intrinsic size of the composition. 
+
+Previously the lottie parser was automatically multiplying the size of the composition by `window.devicePixelRatio`.
+This was incorrect as it results in a widget of a different size depending on the pixel ratio of the monitor. 
+Furthermore, it created some bugs when the property `window.devicePixelRatio` was not available immediately at the start
+of the app (on Android release builds). 
+
+The code can be adapted to specify explicitly the size of the animation with `width`, `height` and `fit` properties.
+
+```dart
+Scaffold(
+  body: Center(
+    child: Lottie.asset(
+      'assets/LottieLogo1.json',
+      height: 800,
+      fit: BoxFit.contain,
+    ),
+  ),
+);
+```
+
+## 1.4.3
+- Fixed some lints with Flutter 3.3. 
+
+## 1.4.2
+- Use `FilterQuality.low` as default to draw image layers.
+
+## 1.4.1
+- Allow `AlignmentGeometry` for `alignment`.
+
+## 1.4.0
+- Added `filterQuality` property to control the performance vs quality trade-off to use when drawing images
+
+## 1.3.0
+- Added support for rounded corners on shapes and rects
+- Add support for text in dynamic properties (`ValueDelegate`)
+
+Example:
+
+```dart
+Lottie.asset(
+  'assets/DynamicText.json',
+  delegates: LottieDelegates(values: [
+    ValueDelegate.text(
+      ['Text layer'], // The path to the text element to change
+      value: 'The new text',
+    ),
+  ]),
+)
+```
+
+- Improve stroke with offset
+- Add support for reversed polystar paths
+- Enforce order of operations to avoid rounding errors
+
+## 1.2.2
+- Internal maintenance: fix lints for Flutter 2.10
+
+## 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]
+## 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]
+## 0.7.1
 - Fix a crash for some lottie file with empty paths.
 
-## [0.7.0+1]
+## 0.7.0+1
 - Fix Flutter Web compilation error
 
-## [0.7.0]
+## 0.7.0
 - Performance improvement for complex animations.
 
-## [0.6.0]
+## 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).  
   A new property `frameRate` allows to opt-out this behavior and have the widget to repaint at the device frame rate 
@@ -27,20 +179,20 @@
 - Fix a bug where we would call `markNeedPaint` when the animation was not changing. This removes unnecessary paints in
   animations with static periods.
 
-## [0.5.1]
+## 0.5.1
 - Remove direct dependencies on dart:io to support Flutter Web
 
-## [0.5.0]
+## 0.5.0
 - Support loading animation from network in a web app
 - Fix a couple of bugs with the web dev compiler
 
-## [0.4.1]
+## 0.4.1
 - Support color value stored as RGB, not RGBA 
 
-## [0.4.0+1]
+## 0.4.0+1
 - Support latest version of the `characters` package
 
-## [0.4.0]
+## 0.4.0
 - Disable "Merge paths" by default and provide an option to enable them.  
 This is the same behavior as in Lottie-android.  
 Merge paths currently don't work if the the operand shape is entirely contained within the
@@ -53,62 +205,62 @@ Lottie.asset('file.json', options: LottieOptions(enableMergePaths: true));
 ```
 
 
-## [0.3.6]
+## 0.3.6
 - Export the `Marker` class
 
-## [0.3.5]
+## 0.3.5
 - Fix a bug with a wrongly clipped rectangle. 
 
-## [0.3.4]
+## 0.3.4
 - Fix a bug with dashed path
 
-## [0.3.3]
+## 0.3.3
 - Fix a bug with rounded rectangle shape
 
-## [0.3.2]
+## 0.3.2
 - Fix a bug with "repeater" content
 
-## [0.3.1]
+## 0.3.1
 - Support dashed path
 
-## [0.3.0+1]
+## 0.3.0+1
 - Specify a version range for the dependency on `characters`.
 
-## [0.3.0]
+## 0.3.0
 - Add `LottieDelegates` a group of options to customize the lottie animation at runtime.
   ie: Dynamically modify color, position, size, text... of every elements of the animation.
 - Correctly display Linear and Radial Gradients
 - Integrate latest changes from Lottie-android
 
-## [0.2.2]
+## 0.2.2
 - Add a [repeat] parameter to specify if the automatic animation should loop.
 - Add the [animate], [reverse], [repeat] properties on `LottieBuilder`
 - Fix bug with `onLoaded` callback when the `LottieProvider` is changed
 
-## [0.2.1]
+## 0.2.1
 - Fix a big bug in the path transformation code. A lot more animations look correct now.
 
-## [0.2.0+1]
+## 0.2.0+1
 - Improve readme
 - (internal) Add golden tests
 
-## [0.2.0]
+## 0.2.0
 - Support loading the animation and its images from a zip file
 - Breaking: `LottieComposition.fromBytes` and `fromByteData` are now asynchronous.
 
-## [0.1.4]
+## 0.1.4
 - Support images in animation
 - Basic support for text in animation (work in progress)
 
-## [0.1.3]
+## 0.1.3
 - Support Polystar shape
 - Reorganize examples.
 
-## [0.1.2]
+## 0.1.2
 - Implement `Lottie.network`, `Lottie.file` and `Lottie.memory`
 
-## [0.1.1]
+## 0.1.1
 - Fix analysis lints
 
-## [0.1.0]
+## 0.1.0
 - Initial conversion of [lottie-android](https://github.com/airbnb/lottie-android) to Dart/Flutter

README.md

@@ -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({super.key});
+
   @override
   Widget build(BuildContext context) {
     return MaterialApp(
@@ -56,11 +58,13 @@ 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({super.key});
+
   @override
-  _MyAppState createState() => _MyAppState();
+  State<MyApp> createState() => _MyAppState();
 }
 
 class _MyAppState extends State<MyApp> with TickerProviderStateMixin {
@@ -125,15 +129,16 @@ animation.
 The `Lottie` widget has several convenient constructors (`Lottie.asset`, `Lottie.network`, `Lottie.memory`) to load, parse and
 cache automatically the json file.
 
-Sometime you may prefer to have full control over the loading of the file. Use `LottieComposition.fromByteData` to 
-parse the file from a list of bytes.
+Sometime you may prefer to have full control over the loading of the file. Use `AssetLottie` (or `NetworkLottie`, `MemoryLottie`) to load a lottie composition from a json file.
 
 This example shows how to load and parse a Lottie composition from a json file.  
 
 ```dart
 class MyWidget extends StatefulWidget {
+  const MyWidget({super.key});
+
   @override
-  _MyWidgetState createState() => _MyWidgetState();
+  State<MyWidget> createState() => _MyWidgetState();
 }
 
 class _MyWidgetState extends State<MyWidget> {
@@ -143,12 +148,7 @@ class _MyWidgetState extends State<MyWidget> {
   void initState() {
     super.initState();
 
-    _composition = _loadComposition();
-  }
-
-  Future<LottieComposition> _loadComposition() async {
-    var assetData = await rootBundle.load('assets/LottieLogo1.json');
-    return await LottieComposition.fromByteData(assetData);
+    _composition = AssetLottie('assets/LottieLogo1.json').load();
   }
 
   @override
@@ -160,7 +160,7 @@ class _MyWidgetState extends State<MyWidget> {
         if (composition != null) {
           return Lottie(composition: composition);
         } else {
-          return Center(child: CircularProgressIndicator());
+          return const Center(child: CircularProgressIndicator());
         }
       },
     );
@@ -176,13 +176,13 @@ 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, {super.key});
 
   @override
   Widget build(BuildContext context) {
     return CustomPaint(
       painter: _Painter(composition),
-      size: Size(400, 400),
+      size: const Size(400, 400),
     );
   }
 }
@@ -236,7 +236,7 @@ class _Animation extends StatelessWidget {
           ),
           ValueDelegate.position(
             const ['Shape Layer 1', 'Rectangle', '**'],
-            relative: Offset(100, 200),
+            relative: const Offset(100, 200),
           ),
         ],
       ),

README.template.md

@@ -51,8 +51,7 @@ animation.
 The `Lottie` widget has several convenient constructors (`Lottie.asset`, `Lottie.network`, `Lottie.memory`) to load, parse and
 cache automatically the json file.
 
-Sometime you may prefer to have full control over the loading of the file. Use `LottieComposition.fromByteData` to 
-parse the file from a list of bytes.
+Sometime you may prefer to have full control over the loading of the file. Use `AssetLottie` (or `NetworkLottie`, `MemoryLottie`) to load a lottie composition from a json file.
 
 This example shows how to load and parse a Lottie composition from a json file.  
 

analysis_options.yaml

@@ -1,39 +1,33 @@
-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_print: false
+
+    always_declare_return_types: true
+    avoid_dynamic_calls: true
+    avoid_escaping_inner_quotes: true
+    avoid_final_parameters: true
     avoid_returning_null_for_future: true
-    avoid_returning_null_for_void: true
-    avoid_returning_this: 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
+    use_super_parameters: 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({super.key});
+
   @override
   Widget build(BuildContext context) {
     return MaterialApp(

example/android/.gitignore

@@ -5,3 +5,9 @@ gradle-wrapper.jar
 /gradlew.bat
 /local.properties
 GeneratedPluginRegistrant.java
+
+# Remember to never publicly share your keystore.
+# See https://flutter.dev/docs/deployment/android#reference-the-keystore-from-the-app
+key.properties
+**/*.keystore
+**/*.jks

example/android/app/build.gradle

@@ -8,7 +8,7 @@ if (localPropertiesFile.exists()) {
 
 def flutterRoot = localProperties.getProperty('flutter.sdk')
 if (flutterRoot == null) {
-    throw new Exception("Flutter SDK not found. Define location with flutter.sdk in the local.properties file.")
+    throw new GradleException("Flutter SDK not found. Define location with flutter.sdk in the local.properties file.")
 }
 
 def flutterVersionCode = localProperties.getProperty('flutter.versionCode')
@@ -26,23 +26,28 @@ apply plugin: 'kotlin-android'
 apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
 
 android {
-    compileSdkVersion 28
+    compileSdkVersion flutter.compileSdkVersion
+
+    compileOptions {
+        sourceCompatibility JavaVersion.VERSION_1_8
+        targetCompatibility JavaVersion.VERSION_1_8
+    }
+
+    kotlinOptions {
+        jvmTarget = '1.8'
+    }
 
     sourceSets {
         main.java.srcDirs += 'src/main/kotlin'
     }
 
-    lintOptions {
-        disable 'InvalidPackage'
-    }
-
     defaultConfig {
-        applicationId "com.github.xvrh.lottie.sample"
-        minSdkVersion 16
-        targetSdkVersion 28
+        // TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
+        applicationId "com.github.xvrh.lottie.example"
+        minSdkVersion flutter.minSdkVersion
+        targetSdkVersion flutter.targetSdkVersion
         versionCode flutterVersionCode.toInteger()
         versionName flutterVersionName
-        testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
     }
 
     buildTypes {
@@ -60,7 +65,4 @@ flutter {
 
 dependencies {
     implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
-    testImplementation 'junit:junit:4.12'
-    androidTestImplementation 'androidx.test:runner:1.1.1'
-    androidTestImplementation 'androidx.test.espresso:espresso-core:3.1.1'
 }

example/android/app/src/debug/AndroidManifest.xml

@@ -1,5 +1,5 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    package="com.github.xvrh.lottie.sample">
+    package="com.github.xvrh.lottie.example">
     <!-- Flutter needs it to communicate with the running application
          to allow setting breakpoints, to provide hot reload, etc.
     -->

example/android/app/src/main/AndroidManifest.xml

@@ -1,21 +1,25 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    package="com.github.xvrh.lottie.sample">
-    <!-- io.flutter.app.FlutterApplication is an android.app.Application that
-         calls FlutterMain.startInitialization(this); in its onCreate method.
-         In most cases you can leave this as-is, but you if you want to provide
-         additional functionality it is fine to subclass or reimplement
-         FlutterApplication and put your custom class here. -->
-    <application
-        android:name="io.flutter.app.FlutterApplication"
+    package="com.github.xvrh.lottie.example">
+   <application
         android:label="example"
+        android:name="${applicationName}"
         android:icon="@mipmap/ic_launcher">
         <activity
             android:name=".MainActivity"
+            android:exported="true"
             android:launchMode="singleTop"
             android:theme="@style/LaunchTheme"
             android:configChanges="orientation|keyboardHidden|keyboard|screenSize|smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
             android:hardwareAccelerated="true"
             android:windowSoftInputMode="adjustResize">
+            <!-- Specifies an Android theme to apply to this Activity as soon as
+                 the Android process has started. This theme is visible to the user
+                 while the Flutter UI initializes. After that, this theme continues
+                 to determine the Window background behind the Flutter UI. -->
+            <meta-data
+              android:name="io.flutter.embedding.android.NormalTheme"
+              android:resource="@style/NormalTheme"
+              />
             <intent-filter>
                 <action android:name="android.intent.action.MAIN"/>
                 <category android:name="android.intent.category.LAUNCHER"/>

example/android/app/src/main/kotlin/com/github/xvrh/lottie/example/MainActivity.kt

@@ -0,0 +1,6 @@
+package com.github.xvrh.lottie.example
+
+import io.flutter.embedding.android.FlutterActivity
+
+class MainActivity: FlutterActivity() {
+}

example/android/app/src/main/kotlin/com/github/xvrh/lottie/sample/MainActivity.kt

@@ -1,12 +0,0 @@
-package com.github.xvrh.lottie.sample
-
-import androidx.annotation.NonNull;
-import io.flutter.embedding.android.FlutterActivity
-import io.flutter.embedding.engine.FlutterEngine
-import io.flutter.plugins.GeneratedPluginRegistrant
-
-class MainActivity: FlutterActivity() {
-    override fun configureFlutterEngine(@NonNull flutterEngine: FlutterEngine) {
-        GeneratedPluginRegistrant.registerWith(flutterEngine);
-    }
-}

example/android/app/src/main/res/drawable-v21/launch_background.xml

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!-- Modify this file to customize your launch splash screen -->
+<layer-list xmlns:android="http://schemas.android.com/apk/res/android">
+    <item android:drawable="?android:colorBackground" />
+
+    <!-- You can insert your own image assets here -->
+    <!-- <item>
+        <bitmap
+            android:gravity="center"
+            android:src="@mipmap/launch_image" />
+    </item> -->
+</layer-list>

example/android/app/src/main/res/values-night/styles.xml

@@ -0,0 +1,18 @@
+<?xml version="1.0" encoding="utf-8"?>
+<resources>
+    <!-- Theme applied to the Android Window while the process is starting when the OS's Dark Mode setting is on -->
+    <style name="LaunchTheme" parent="@android:style/Theme.Black.NoTitleBar">
+        <!-- Show a splash screen on the activity. Automatically removed when
+             Flutter draws its first frame -->
+        <item name="android:windowBackground">@drawable/launch_background</item>
+    </style>
+    <!-- Theme applied to the Android Window as soon as the process has started.
+         This theme determines the color of the Android Window while your
+         Flutter UI initializes, as well as behind your Flutter UI while its
+         running.
+
+         This Theme is only used starting with V2 of Flutter's Android embedding. -->
+    <style name="NormalTheme" parent="@android:style/Theme.Black.NoTitleBar">
+        <item name="android:windowBackground">?android:colorBackground</item>
+    </style>
+</resources>

example/android/app/src/main/res/values/styles.xml

@@ -1,8 +1,18 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
-    <style name="LaunchTheme" parent="@android:style/Theme.Black.NoTitleBar">
+    <!-- Theme applied to the Android Window while the process is starting when the OS's Dark Mode setting is off -->
+    <style name="LaunchTheme" parent="@android:style/Theme.Light.NoTitleBar">
         <!-- Show a splash screen on the activity. Automatically removed when
              Flutter draws its first frame -->
         <item name="android:windowBackground">@drawable/launch_background</item>
     </style>
+    <!-- Theme applied to the Android Window as soon as the process has started.
+         This theme determines the color of the Android Window while your
+         Flutter UI initializes, as well as behind your Flutter UI while its
+         running.
+
+         This Theme is only used starting with V2 of Flutter's Android embedding. -->
+    <style name="NormalTheme" parent="@android:style/Theme.Light.NoTitleBar">
+        <item name="android:windowBackground">?android:colorBackground</item>
+    </style>
 </resources>

example/android/app/src/profile/AndroidManifest.xml

@@ -1,5 +1,5 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
-    package="com.github.xvrh.lottie.sample">
+    package="com.github.xvrh.lottie.example">
     <!-- Flutter needs it to communicate with the running application
          to allow setting breakpoints, to provide hot reload, etc.
     -->

example/android/build.gradle

@@ -1,12 +1,12 @@
 buildscript {
-    ext.kotlin_version = '1.3.50'
+    ext.kotlin_version = '1.6.10'
     repositories {
         google()
-        jcenter()
+        mavenCentral()
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.5.0'
+        classpath 'com.android.tools.build:gradle:4.1.0'
         classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
     }
 }
@@ -14,7 +14,7 @@ buildscript {
 allprojects {
     repositories {
         google()
-        jcenter()
+        mavenCentral()
     }
 }
 

example/android/gradle.properties

@@ -1,4 +1,3 @@
 org.gradle.jvmargs=-Xmx1536M
-android.enableR8=true
 android.useAndroidX=true
 android.enableJetifier=true

example/android/gradle/wrapper/gradle-wrapper.properties

@@ -3,4 +3,4 @@ distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-5.6.2-all.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-6.7-all.zip

example/android/settings.gradle

@@ -1,15 +1,11 @@
 include ':app'
 
-def flutterProjectRoot = rootProject.projectDir.parentFile.toPath()
+def localPropertiesFile = new File(rootProject.projectDir, "local.properties")
+def properties = new Properties()
 
-def plugins = new Properties()
-def pluginsFile = new File(flutterProjectRoot.toFile(), '.flutter-plugins')
-if (pluginsFile.exists()) {
-    pluginsFile.withReader('UTF-8') { reader -> plugins.load(reader) }
-}
+assert localPropertiesFile.exists()
+localPropertiesFile.withReader("UTF-8") { reader -> properties.load(reader) }
 
-plugins.each { name, path ->
-    def pluginDirectory = flutterProjectRoot.resolve(path).resolve('android').toFile()
-    include ":$name"
-    project(":$name").projectDir = pluginDirectory
-}
+def flutterSdkPath = properties.getProperty("flutter.sdk")
+assert flutterSdkPath != null, "flutter.sdk not set in local.properties"
+apply from: "$flutterSdkPath/packages/flutter_tools/gradle/app_plugin_loader.gradle"

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/BeyondBounds.json

@@ -0,0 +1 @@
+{"v":"5.8.2","fr":23.9759979248047,"ip":0,"op":71.9999937681822,"w":400,"h":400,"nm":"BeyondBounds","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,"shapes":[{"ty":"gr","it":[{"d":1,"ty":"el","s":{"a":0,"k":[510.547,510.547],"ix":2},"p":{"a":0,"k":[0,0],"ix":3},"nm":"Ellipse Path 1","mn":"ADBE Vector Shape - Ellipse","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":[0,0],"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":"Ellipse 1","np":2,"cix":2,"bm":0,"ix":1,"mn":"ADBE Vector Group","hd":false}],"ip":0,"op":71.9999937681822,"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/Framerate.json

@@ -0,0 +1 @@
+{"v":"5.9.6","fr":3,"ip":0,"op":3,"w":200,"h":200,"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":1,"k":[{"i":{"x":0.833,"y":0.833},"o":{"x":0.167,"y":0.167},"t":0,"s":[30,30,0],"to":[21.667,21.667,0],"ti":[-21.667,-21.667,0]},{"t":2,"s":[160,160,0]}],"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,"shapes":[{"ty":"gr","it":[{"ty":"rc","d":1,"s":{"a":0,"k":[58.742,58.742],"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":[0,0],"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":3,"st":0,"ct":1,"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
+            },
+            {
+              "ty": "tr",
+              "p": { "a": 0, "k": [1.141, 0.406], "ix": 2 },
+              "a": { "a": 0, "k": [-5, -39], "ix": 1 },
+              "s": { "a": 0, "k": [105.082, 105.082], "ix": 3 },
+              "r": { "a": 0, "k": -5.052, "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": "Group 1",
+          "np": 9,
+          "cix": 2,
+          "bm": 0,
+          "ix": 1,
+          "mn": "ADBE Vector Group",
+          "hd": false
+        }
+      ],
+      "ip": -6,
+      "op": 69,
+      "st": 1.2,
+      "bm": 0
+    }
+  ],
+  "markers": []
+}

example/assets/Tests/GradientStrokeBlur.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":"gs","o":{"a":0,"k":100,"ix":9},"w":{"a":0,"k":41,"ix":10},"g":{"p":3,"k":{"a":0,"k":[0,0.01,0,1,0.5,0.496,0,0.5,1,0.982,0,0],"ix":8}},"s":{"a":0,"k":[-45,0],"ix":4},"e":{"a":0,"k":[100,0],"ix":5},"t":1,"lc":1,"lj":1,"ml":4,"ml2":{"a":0,"k":4,"ix":13},"bm":0,"nm":"Gradient Stroke 1","mn":"ADBE Vector Graphic - G-Stroke","hd":false}],"ip":0,"op":121.000004928431,"st":0,"bm":0}],"markers":[]}

example/assets/Tests/LargeComposition.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/ReversedStar.json

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example/assets/Tests/RoundedCorners.json

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example/assets/Tests/StaticShadow.json

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+</dict>
+</plist>

example/ios/Runner.xcworkspace/xcshareddata/WorkspaceSettings.xcsettings

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
+<plist version="1.0">
+<dict>
+	<key>PreviewsEnabled</key>
+	<false/>
+</dict>
+</plist>

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({super.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({super.key});
 
   @override
   Widget build(BuildContext context) {

example/lib/examples/animation_controller.dart

@@ -1,11 +1,13 @@
 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({super.key});
+
   @override
-  _MyAppState createState() => _MyAppState();
+  State<MyApp> createState() => _MyAppState();
 }
 
 class _MyAppState extends State<MyApp> with TickerProviderStateMixin {

example/lib/examples/animation_full_control.dart

@@ -9,11 +9,13 @@ 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({super.key});
+
   @override
-  _MyAppState createState() => _MyAppState();
+  State<MyApp> createState() => _MyAppState();
 }
 
 class _MyAppState extends State<MyApp> with TickerProviderStateMixin {
@@ -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();
                   },
@@ -87,7 +89,6 @@ class _MyAppState extends State<MyApp> with TickerProviderStateMixin {
             ),
             const SizedBox(height: 30),
             ElevatedButton(
-              child: Text('Loop between frames'),
               onPressed: () {
                 // Loop between 2 specifics frames
 
@@ -100,6 +101,7 @@ class _MyAppState extends State<MyApp> with TickerProviderStateMixin {
                   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({super.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/cache.dart

@@ -0,0 +1,59 @@
+import 'package:flutter/material.dart';
+import 'package:lottie/lottie.dart';
+
+void main() => runApp(const App());
+
+class App extends StatelessWidget {
+  const App({super.key});
+
+  @override
+  Widget build(BuildContext context) {
+    return MaterialApp(
+      home: Scaffold(body: _Page()),
+    );
+  }
+}
+
+class _Page extends StatefulWidget {
+  @override
+  __PageState createState() => __PageState();
+}
+
+class __PageState extends State<_Page> {
+  var _animationKey = UniqueKey();
+
+  @override
+  void initState() {
+    super.initState();
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return Column(
+      children: [
+        Lottie.network(
+          'https://assets10.lottiefiles.com/datafiles/QeC7XD39x4C1CIj/data.json',
+          key: _animationKey,
+          fit: BoxFit.contain,
+          width: 200,
+          height: 200,
+        ),
+        ElevatedButton(
+          onPressed: () {
+            Lottie.cache.clear();
+            Lottie.cache.maximumSize = 10;
+          },
+          child: const Text('Clear cache'),
+        ),
+        ElevatedButton(
+          onPressed: () {
+            setState(() {
+              _animationKey = UniqueKey();
+            });
+          },
+          child: const Text('Recreate animation'),
+        ),
+      ],
+    );
+  }
+}

example/lib/examples/custom_draw.dart

@@ -1,14 +1,15 @@
 import 'package:flutter/material.dart';
 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({super.key});
+
   @override
   Widget build(BuildContext context) {
-    return MaterialApp(
+    return const MaterialApp(
       home: Scaffold(
         body: MyWidget(),
       ),
@@ -17,8 +18,10 @@ class MyApp extends StatelessWidget {
 }
 
 class MyWidget extends StatefulWidget {
+  const MyWidget({super.key});
+
   @override
-  _MyWidgetState createState() => _MyWidgetState();
+  State<MyWidget> createState() => _MyWidgetState();
 }
 
 class _MyWidgetState extends State<MyWidget> {
@@ -46,7 +49,7 @@ class _MyWidgetState extends State<MyWidget> {
         if (composition != null) {
           return CustomDrawer(composition);
         } else {
-          return Center(child: CircularProgressIndicator());
+          return const Center(child: CircularProgressIndicator());
         }
       },
     );
@@ -57,13 +60,13 @@ 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, {super.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

@@ -1,14 +1,14 @@
 import 'package:flutter/material.dart';
-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({super.key});
+
   @override
   Widget build(BuildContext context) {
-    return MaterialApp(
+    return const MaterialApp(
       home: Scaffold(
         body: MyWidget(),
       ),
@@ -18,8 +18,10 @@ class MyApp extends StatelessWidget {
 
 //--- example
 class MyWidget extends StatefulWidget {
+  const MyWidget({super.key});
+
   @override
-  _MyWidgetState createState() => _MyWidgetState();
+  State<MyWidget> createState() => _MyWidgetState();
 }
 
 class _MyWidgetState extends State<MyWidget> {
@@ -29,12 +31,7 @@ class _MyWidgetState extends State<MyWidget> {
   void initState() {
     super.initState();
 
-    _composition = _loadComposition();
-  }
-
-  Future<LottieComposition> _loadComposition() async {
-    var assetData = await rootBundle.load('assets/LottieLogo1.json');
-    return await LottieComposition.fromByteData(assetData);
+    _composition = AssetLottie('assets/LottieLogo1.json').load();
   }
 
   @override
@@ -46,7 +43,7 @@ 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({super.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

@@ -1,17 +1,16 @@
-import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
 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({super.key});
 
   @override
-  _AppState createState() => _AppState();
+  State<App> createState() => _AppState();
 }
 
 class _AppState extends State<App> with TickerProviderStateMixin {
@@ -33,7 +32,7 @@ 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>[
@@ -63,7 +62,7 @@ class _AppState extends State<App> with TickerProviderStateMixin {
               },
             ),
             Center(
-              child: Container(
+              child: SizedBox(
                 width: 500,
                 child: ColorPicker(
                   pickerColor: _color,
@@ -72,7 +71,7 @@ class _AppState extends State<App> with TickerProviderStateMixin {
                       _color = newColor;
                     });
                   },
-                  showLabel: false,
+                  labelTypes: const [],
                   enableAlpha: false,
                   pickerAreaHeightPercent: 0.8,
                 ),

example/lib/examples/dynamic_text.dart

@@ -3,14 +3,14 @@ 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({super.key});
 
   @override
-  _AppState createState() => _AppState();
+  State<App> createState() => _AppState();
 }
 
 class _AppState extends State<App> with TickerProviderStateMixin {
@@ -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({super.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({super.key});
+
   @override
   Widget build(BuildContext context) {
     return MaterialApp(

example/lib/examples/hide_after_complete.dart

@@ -2,14 +2,14 @@ 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({super.key});
 
   @override
-  _AppState createState() => _AppState();
+  State<App> createState() => _AppState();
 }
 
 class _AppState extends State<App> with TickerProviderStateMixin {

example/lib/examples/markers.dart

@@ -5,14 +5,14 @@ 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({super.key});
 
   @override
-  _AppState createState() => _AppState();
+  State<App> createState() => _AppState();
 }
 
 class _AppState extends State<App> with TickerProviderStateMixin {
@@ -30,13 +30,13 @@ 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();
+            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);
 
   @override
   _LottieDetailsState createState() => _LottieDetailsState();
@@ -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)),
         ),
         ElevatedButton(
-          child: Text('touchDownEnd - touchUpCancel'),
           onPressed: () => _playBetween('touchDownEnd', 'touchUpCancel'),
+          child: const Text('touchDownEnd - touchUpCancel'),
         ),
         ElevatedButton(
-          child: Text('touchDownStart - touchDownEnd'),
           onPressed: () => _playBetween('touchDownStart', 'touchDownEnd'),
+          child: const Text('touchDownStart - touchDownEnd'),
         ),
         ElevatedButton(
-          child: Text('touchDownEnd - touchUpEnd'),
           onPressed: () => _playBetween('touchDownEnd', 'touchUpEnd'),
+          child: const Text('touchDownEnd - touchUpEnd'),
         ),
         for (var marker in widget.composition.markers)
           ListTile(

example/lib/examples/repeat.dart

@@ -1,11 +1,13 @@
 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({super.key});
+
   @override
-  _MyAppState createState() => _MyAppState();
+  State<MyApp> createState() => _MyAppState();
 }
 
 class _MyAppState extends State<MyApp> with TickerProviderStateMixin {

example/lib/examples/run_once.dart

@@ -8,14 +8,14 @@ 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({super.key});
 
   @override
-  _AppState createState() => _AppState();
+  State<App> createState() => _AppState();
 }
 
 class _AppState extends State<App> with TickerProviderStateMixin {

example/lib/examples/save_frames.dart

@@ -1,5 +1,3 @@
-//@dart=2.10
-
 import 'dart:io';
 import 'dart:ui';
 import 'package:flutter/material.dart';
@@ -9,15 +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({super.key});
+
   @override
-  _MyAppState createState() => _MyAppState();
+  State<MyApp> createState() => _MyAppState();
 }
 
 class _MyAppState extends State<MyApp> {
-  List<File> _frames;
+  List<File>? _frames;
 
   @override
   Widget build(BuildContext context) {
@@ -29,14 +29,14 @@ class _MyAppState extends State<MyApp> {
             crossAxisAlignment: CrossAxisAlignment.stretch,
             children: [
               ElevatedButton(
-                child: Text('Export all frames'),
                 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))],
                   ),
                 )
             ],
@@ -53,7 +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;
@@ -62,7 +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>[];
@@ -89,7 +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({super.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({super.key});
+
   @override
   Widget build(BuildContext context) {
     return MaterialApp(

example/lib/main_app.dart

@@ -1,56 +1,60 @@
-import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
 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({super.key});
+
   @override
   Widget build(BuildContext context) {
     return MaterialApp(
       //showPerformanceOverlay: true,
       home: Scaffold(
         appBar: AppBar(
-          title: Text('Lottie Flutter'),
+          title: const Text('Lottie Flutter'),
         ),
-        body: Scrollbar(
-          child: 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: GridView.builder(
+          primary: true,
+          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,
+                  fit: BoxFit.contain,
+                  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.push(
-                      context,
-                      MaterialPageRoute<void>(
-                          builder: (context) => Detail(assetName)));
-                },
-              );
-            },
-          ),
+              ),
+            );
+          },
         ),
       ),
     );
@@ -60,7 +64,7 @@ class App extends StatelessWidget {
 class _Item extends StatelessWidget {
   final Widget child;
 
-  const _Item({Key? key, required this.child}) : super(key: key);
+  const _Item({required this.child});
 
   @override
   Widget build(BuildContext context) {
@@ -69,11 +73,11 @@ 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,
@@ -85,10 +89,10 @@ class _Item extends StatelessWidget {
 class Detail extends StatefulWidget {
   final String assetName;
 
-  const Detail(this.assetName, {Key? key}) : super(key: key);
+  const Detail(this.assetName, {super.key});
 
   @override
-  _DetailState createState() => _DetailState();
+  State<Detail> createState() => _DetailState();
 }
 
 class _DetailState extends State<Detail> with TickerProviderStateMixin {
@@ -104,7 +108,7 @@ 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, required this.composition}) : super(key: key);
+  const App({super.key, required this.composition});
 
   @override
   Widget build(BuildContext context) {
     return MaterialApp(
       home: Scaffold(
         appBar: AppBar(
-          title: Text(''),
+          title: const Text(''),
         ),
         body: SingleChildScrollView(
           child: Center(
@@ -103,8 +103,7 @@ class _Lottie extends StatefulWidget {
   final AlignmentGeometry? alignment;
 
   const _Lottie(this.composition,
-      {Key? key, this.width, this.height, this.fit, this.alignment})
-      : super(key: key);
+      {this.width, this.height, this.fit, this.alignment});
 
   @override
   __LottieState createState() => __LottieState();

example/lib/src/all_files.g.dart

@@ -43,18 +43,32 @@ final files = [
   'assets/Tests/Airbnb.zip',
   'assets/Tests/Airbnb400.zip',
   'assets/Tests/Airbnb800.zip',
+  'assets/Tests/AnimatedShadow.json',
+  'assets/Tests/BeyondBounds.json',
+  'assets/Tests/BoxPosition.json',
   'assets/Tests/CheckSwitch.json',
   'assets/Tests/DifferentPointsCount.json',
   'assets/Tests/DynamicGradient.json',
   'assets/Tests/DynamicText.json',
+  'assets/Tests/EditedColor.json',
   'assets/Tests/EllipseDirection.json',
+  'assets/Tests/EmbeddedFont.zip',
   'assets/Tests/EndFrame.json',
   'assets/Tests/Fill.json',
+  'assets/Tests/FillBlur.json',
   'assets/Tests/Font_Text_Justification_Translate_Scale_Rotation_Test.json',
   'assets/Tests/Frame.json',
+  'assets/Tests/Framerate.json',
   'assets/Tests/GradientFill.json',
+  'assets/Tests/GradientFillBlur.json',
+  'assets/Tests/GradientOneColor.json',
+  'assets/Tests/GradientOpacityInterpolation.json',
+  'assets/Tests/GradientStrokeBlur.json',
+  'assets/Tests/Heart.json',
+  'assets/Tests/InterpolateBetweenOpacityStops.json',
   'assets/Tests/InterpolatorLoopBack.json',
   'assets/Tests/KeyframeTypes.json',
+  'assets/Tests/LargeComposition.json',
   'assets/Tests/Laugh4.json',
   'assets/Tests/LoopPlayOnce.json',
   'assets/Tests/Marker.json',
@@ -65,39 +79,66 @@ final files = [
   'assets/Tests/MatteTimeStretchLine.json',
   'assets/Tests/MatteTimeStretchScan.json',
   'assets/Tests/MiterLimit.json',
+  'assets/Tests/Multiline.json',
+  'assets/Tests/OpacityStops.json',
   'assets/Tests/OverlapShapeWithOpacity.json',
   'assets/Tests/Parenting.json',
+  'assets/Tests/PrecompBlur.json',
+  'assets/Tests/PrecompBlurDecimapPrecompSize.json',
   'assets/Tests/Precomps.json',
   'assets/Tests/RGB.json',
   'assets/Tests/RGBMarker.json',
+  'assets/Tests/Rect1.json',
+  'assets/Tests/Rect3.json',
+  'assets/Tests/Rect4.json',
+  'assets/Tests/Rect5.json',
+  'assets/Tests/Rect6.json',
+  'assets/Tests/Rect7.json',
+  'assets/Tests/Rect8.json',
+  'assets/Tests/Rect9.json',
   'assets/Tests/Remap.json',
   'assets/Tests/Repeater.json',
+  'assets/Tests/ReversedStar.json',
+  'assets/Tests/RoundedCorners.json',
+  'assets/Tests/RoundedWithAlreadyRoundedCorners.json',
   'assets/Tests/Scale0.json',
   'assets/Tests/ShapeTypes.json',
   'assets/Tests/Shapes.json',
   'assets/Tests/Skew.json',
   'assets/Tests/SolidLayerTransform.json',
   'assets/Tests/SplitDimensions.json',
+  'assets/Tests/SplitPathTransform.json',
   'assets/Tests/Squares.json',
   'assets/Tests/StarSkew.json',
   'assets/Tests/StartEndFrame.json',
+  'assets/Tests/StaticShadow.json',
   'assets/Tests/Stroke.json',
+  'assets/Tests/StrokeBlur.json',
   'assets/Tests/TelegramAlphaCompat.json',
   'assets/Tests/Text.json',
   'assets/Tests/TextBaseline.json',
+  'assets/Tests/TextWithPsCenter.json',
+  'assets/Tests/TextWithPsLeft.json',
   'assets/Tests/Text_Justification_Translate_Scale_Rotation_Text.json',
+  'assets/Tests/TgsWithoutOpacity.json',
+  'assets/Tests/Thumb.json',
   'assets/Tests/TimeRemapAndStartOffset.json',
   'assets/Tests/TimeStretch.json',
+  'assets/Tests/TimeStretchAndStartOffset.json',
   'assets/Tests/TimeStretchMask.json',
   'assets/Tests/TimeStretchPrecomp.json',
+  'assets/Tests/TimeStretchPrecomp2.json',
   'assets/Tests/TrackMattes.json',
   'assets/Tests/TransformWithoutEndValues.json',
+  'assets/Tests/TrimPathWrapAround.json',
   'assets/Tests/TrimPaths.json',
   'assets/Tests/TrimPathsInsideAndOutsideGroup.json',
   'assets/Tests/WeAccept.json',
   'assets/Tests/WeAcceptInlineImage.json',
+  'assets/Tests/ZipInlineImage.zip',
   'assets/Tests/adrock.json',
   'assets/Tests/adrock_converted.json',
+  'assets/Tests/anim_jpg.zip',
   'assets/Tests/august_view_pulse.zip',
   'assets/Tests/bm.json',
   'assets/Tests/bm_converted.json',
@@ -105,17 +146,23 @@ final files = [
   'assets/Tests/catrim_converted.json',
   'assets/Tests/dalek.json',
   'assets/Tests/dalek_converted.json',
+  'assets/Tests/exported_with_flow.json',
   'assets/Tests/hd.json',
   'assets/Tests/map.zip',
+  'assets/Tests/rect2.json',
+  'assets/Tests/wile.json',
   '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',
@@ -218,6 +265,7 @@ final files = [
   'assets/lottiefiles/la_calavera.json',
   'assets/lottiefiles/landing_page.json',
   'assets/lottiefiles/lego_loader.json',
+  'assets/lottiefiles/lf20_fteywrno.json',
   'assets/lottiefiles/light.json',
   'assets/lottiefiles/lightsaber.json',
   'assets/lottiefiles/little_girl_jumping_-_loader.json',
@@ -346,7 +394,9 @@ 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({super.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({super.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/linux/flutter/generated_plugin_registrant.cc

@@ -0,0 +1,11 @@
+//
+//  Generated file. Do not edit.
+//
+
+// clang-format off
+
+#include "generated_plugin_registrant.h"
+
+
+void fl_register_plugins(FlPluginRegistry* registry) {
+}

example/linux/flutter/generated_plugin_registrant.h

@@ -0,0 +1,15 @@
+//
+//  Generated file. Do not edit.
+//
+
+// clang-format off
+
+#ifndef GENERATED_PLUGIN_REGISTRANT_
+#define GENERATED_PLUGIN_REGISTRANT_
+
+#include <flutter_linux/flutter_linux.h>
+
+// Registers Flutter plugins.
+void fl_register_plugins(FlPluginRegistry* registry);
+
+#endif  // GENERATED_PLUGIN_REGISTRANT_