update to null safety

.github/workflows/config.yml

@@ -0,0 +1,27 @@
+
+name: test
+on:
+  pull_request:
+    branches:
+      - master
+      - null_safety
+
+jobs:
+  flutter_test:
+    name: Run flutter test and analyze
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v2
+      - uses: actions/setup-java@v1
+        with:
+          java-version: "12.x"
+      - uses: subosito/flutter-action@v1
+        with:
+          channel: "dev"
+      - run: |
+          flutter doctor
+          flutter pub get
+          flutter test --coverage
+          bash <(curl -s https://codecov.io/bash)
+
+  

CHANGELOG.md

@@ -1,3 +1,6 @@
+## [3.0.0]
+* update to null safety
+
 ## [2.0.2]
 * update dependencies
 

README.md

@@ -244,3 +244,73 @@ AnimatorRebuilder(
 ```
 
 The order of Animator and AnimatorRebuilder in the widget tree is irrelevant, except in the case, AnimatorRebuilder is first inserted in the widget tree, you have to provide initial values in AnimatorKey to avoid null exceptions.
+
+
+## Example of Flutter log random walk
+
+```dart
+import 'dart:math';
+
+import 'package:flutter/material.dart';
+import 'package:animator/animator.dart';
+
+class RandomFlutterWalk extends StatefulWidget {
+  @override
+  _RandomFlutterWalkState createState() => _RandomFlutterWalkState();
+}
+
+class _RandomFlutterWalkState extends State<RandomFlutterWalk> {
+  double beginX = 0.0;
+  double beginY = 0.0;
+  double endX = Random().nextDouble() * 50;
+  double endY = Random().nextDouble() * 50;
+  int seconds = Random().nextInt(1000);
+
+  @override
+  Widget build(BuildContext context) {
+    final screenSize = MediaQuery.of(context).size;
+    return Scaffold(
+      body: Animator<Offset>(
+        tween: Tween<Offset>(
+            begin: Offset(beginX, beginY), end: Offset(endX, endY)),
+        duration: Duration(milliseconds: 500 + seconds),
+        curve: seconds % 2 == 0 ? Curves.linear : Curves.easeInOut,
+        resetAnimationOnRebuild: true,
+        triggerOnInit: true,
+        cycles: 1,
+        builder: (_, animatorState, __) => Transform.translate(
+          offset: animatorState.value,
+          child: FlutterLogo(
+            size: 50,
+          ),
+        ),
+        statusListener: (status, setup) {
+          if (status == AnimationStatus.completed) {
+            setState(() {
+              final sign = Random().nextBool() ? 1 : -1;
+              beginX = endX;
+              beginY = endY;
+              double nextEndX = endX + sign * Random().nextDouble() * 50;
+              double nextEndY = endY + sign * Random().nextDouble() * 50;
+
+              nextEndX = nextEndX > screenSize.width - 50
+                  ? screenSize.width - 50
+                  : nextEndX;
+              nextEndX = nextEndX < 0 ? 0 : nextEndX;
+              nextEndY = nextEndY > screenSize.height - 50
+                  ? screenSize.width - 50
+                  : nextEndY;
+              nextEndY = nextEndY < 0 ? 0 : nextEndY;
+
+              endX = nextEndX;
+              endY = nextEndY;
+              seconds = Random().nextInt(8);
+            });
+          }
+        },
+      ),
+    );
+  }
+}
+
+```

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/ios/Flutter/flutter_export_environment.sh

@@ -1,12 +1,10 @@
 #!/bin/sh
 # This is a generated file; do not edit or check into version control.
-export "FLUTTER_ROOT=/mnt/A270A07970A055B7/flutter"
-export "FLUTTER_APPLICATION_PATH=/mnt/A270A07970A055B7/Repositories/animator/example"
+export "FLUTTER_ROOT=/home/mafatahnj/flutter"
+export "FLUTTER_APPLICATION_PATH=/run/media/mafatahnj/data/Repository/animator/example"
 export "FLUTTER_TARGET=lib/main.dart"
 export "FLUTTER_BUILD_DIR=build"
 export "SYMROOT=${SOURCE_ROOT}/../build/ios"
-export "OTHER_LDFLAGS=$(inherited) -framework Flutter"
-export "FLUTTER_FRAMEWORK_DIR=/mnt/A270A07970A055B7/flutter/bin/cache/artifacts/engine/ios"
 export "FLUTTER_BUILD_NAME=1.0.0"
 export "FLUTTER_BUILD_NUMBER=1"
 export "DART_OBFUSCATION=false"

example/ios/Runner.xcodeproj/project.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist

@@ -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>IDEDidComputeMac32BitWarning</key>
+	<true/>
+</dict>
+</plist>

example/ios/Runner.xcodeproj/project.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/ios/Runner.xcworkspace/xcshareddata/IDEWorkspaceChecks.plist

@@ -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>IDEDidComputeMac32BitWarning</key>
+	<true/>
+</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/basic_animation_0/main.dart

@@ -1,15 +1,15 @@
+import 'dart:math';
+
 import 'package:flutter/material.dart';
 import 'package:animator/animator.dart';
 
 class BasicAnimation0 extends StatelessWidget {
   Widget build(BuildContext context) {
-    return MaterialApp(
-      home: Scaffold(
-        appBar: AppBar(
-          title: Text('Basic Animation 0'),
-        ),
-        body: Body(),
+    return Scaffold(
+      appBar: AppBar(
+        title: Text('Basic Animation 0'),
       ),
+      body: Body(),
     );
   }
 }
@@ -58,7 +58,6 @@ class _BodyState extends State<Body> {
         Divider(),
         Text('Animation is reset on rebuild. Curve changes on rebuild'),
         Animator<double>(
-          // tickerMixin: TickerMixin.tickerProviderStateMixin,
           duration: Duration(seconds: 2),
           repeats: 1,
           resetAnimationOnRebuild: true,
@@ -70,7 +69,7 @@ class _BodyState extends State<Body> {
             ),
           ),
         ),
-        RaisedButton(
+        ElevatedButton(
           child: Text('Rebuild '),
           onPressed: () {
             setState(() {

example/lib/basic_animation_1/main.dart

@@ -1,5 +1,6 @@
 import 'package:flutter/material.dart';
 import 'pages/opacity.dart';
+import 'pages/random_flutter_walk.dart';
 import 'pages/rotation.dart';
 import 'pages/scale.dart';
 import 'pages/translation.dart';
@@ -10,14 +11,12 @@ import 'pages/animator_key.dart';
 class BasicAnimation1 extends StatelessWidget {
   @override
   Widget build(BuildContext context) {
-    return MaterialApp(
-        title: 'Animator Demo',
-        home: Scaffold(
-          appBar: AppBar(
-            title: Text("Animator demo"),
-          ),
-          body: MyHomePage(),
-        ));
+    return Scaffold(
+      appBar: AppBar(
+        title: Text("Animator demo"),
+      ),
+      body: MyHomePage(),
+    );
   }
 }
 
@@ -36,34 +35,39 @@ class MyHomePage extends StatelessWidget {
     return Center(
       child: Column(
         crossAxisAlignment: CrossAxisAlignment.center,
+        mainAxisAlignment: MainAxisAlignment.spaceEvenly,
         children: <Widget>[
-          RaisedButton(
+          ElevatedButton(
             child: Text("Opacity Animation"),
             onPressed: () => goto(OpacityAnimation(), context),
           ),
-          RaisedButton(
+          ElevatedButton(
             child: Text("Rotation Animation"),
             onPressed: () => goto(RotationAnimation(), context),
           ),
-          RaisedButton(
+          ElevatedButton(
             child: Text("Scale Animation"),
             onPressed: () => goto(ScaleAnimation(), context),
           ),
-          RaisedButton(
+          ElevatedButton(
             child: Text("Translation Animation"),
             onPressed: () => goto(TranslateAnimation(), context),
           ),
-          RaisedButton(
+          ElevatedButton(
             child: Text("Multi Tween Animation"),
             onPressed: () => goto(MultiTweenAnimation(), context),
           ),
-          RaisedButton(
+          ElevatedButton(
             child: Text("Flutter Animation"),
             onPressed: () => goto(FlutterAnimation(), context),
           ),
-          RaisedButton(
+          ElevatedButton(
             child: Text("Animation with AnimatorKey"),
             onPressed: () => goto(AnimationWithAnimatorKey(), context),
+          ),
+          ElevatedButton(
+            child: Text("Random Flutter walk"),
+            onPressed: () => goto(RandomFlutterWalk(), context),
           )
         ],
       ),

example/lib/basic_animation_1/pages/animator_key.dart

@@ -23,6 +23,7 @@ class MyAnimation extends StatelessWidget {
       FlutterLogo(size: 150, style: FlutterLogoStyle.horizontal);
 
   final AnimatorKey animatorKey = AnimatorKey<double>();
+
   @override
   Widget build(BuildContext context) {
     return Center(
@@ -31,20 +32,20 @@ class MyAnimation extends StatelessWidget {
           crossAxisAlignment: CrossAxisAlignment.center,
           children: [
             Text('Start Animation and you can not restart it until it ends'),
-            RaisedButton(
+            ElevatedButton(
               child: Text("Animate"),
               onPressed: () => animatorKey.triggerAnimation(),
             ),
             SizedBox(height: 5),
             Text('Start Animation and restart it if it is running'),
-            RaisedButton(
+            ElevatedButton(
               child: Text("restart animation"),
               onPressed: () => animatorKey.triggerAnimation(restart: true),
             ),
             SizedBox(height: 5),
             Text('Change animation setting and restart it'),
             Text('Curve is changed from linear to bounceIn'),
-            RaisedButton(
+            ElevatedButton(
               child: Text("reset and restart animation using AnimatorKey"),
               onPressed: () => animatorKey
                 ..refreshAnimation(