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/
samples
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Code Issues Projects Releases Wiki Activity

Add navigator 2 samples (#606)

Browse Source 
* add navigation_and_routing sample

* Add navigation samples and README

* remove "goals" section

* add newlines

* add copyright headers

* Update README, remove pubspec comments, add description
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John Ryan 5 years ago committed by GitHub
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navigation_and_routing/.gitignore vendored
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# Miscellaneous
*.class
*.log
*.pyc
*.swp
.DS_Store
.atom/
.buildlog/
.history
.svn/
# IntelliJ related
*.iml
*.ipr
*.iws
.idea/
# The .vscode folder contains launch configuration and tasks you configure in
# VS Code which you may wish to be included in version control, so this line
# is commented out by default.
#.vscode/
# Flutter/Dart/Pub related
**/doc/api/
**/ios/Flutter/.last_build_id
.dart_tool/
.flutter-plugins
.flutter-plugins-dependencies
.packages
.pub-cache/
.pub/
/build/
# Web related
lib/generated_plugin_registrant.dart
# Symbolication related
app.*.symbols
# Obfuscation related
app.*.map.json

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navigation_and_routing/.metadata
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# This file tracks properties of this Flutter project.
# Used by Flutter tool to assess capabilities and perform upgrades etc.
#
# This file should be version controlled and should not be manually edited.
version:
revision: 1aafb3a8b9b0c36241c5f5b34ee914770f015818
channel: stable
project_type: app

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navigation_and_routing/README.md
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# Navigation and Routing sample code
Sample code for [Learning Flutter's New Navigation and Routing System][article],
an article explaining Navigator 2.0.
## Samples
**Navigator 1.0 samples**
* `nav_1/anonymous_routes.dart` - Shows how to use a Navigator to push and pop
anonymous routes (e.g. MaterialPageRoute)
* `nav_1/named_routes.dart` - Shows how to use define named routes via the `routes`
parameter on MaterialApp, and navigate using Navigator.pushNamed
* `nav_1/on_generate_route.dart` - Shows how to handle arbitrary named routes
using the `onGenerateRoute` callback defined in the `MaterialApp` constructor.
** Navigator 2.0 samples**
* `nav_2/pages.dart` - Shows how to define a list of [Page] objects on Navigator
declaratively.
* `nav_2/router.dart` - Full sample that shows a custom RouteInformationParser
and RouterDelegate parsing named routes and declaratively building the stack
of pages for the Navigator.
** Advanced **
* `nav_2_advanced/nested_router.dart` - Shows two [RouterDelegate], one nested
within the other. A [BottomNavigationBar] can be used to select the route of
the outer RouterDelegate, and additional routes can be pushed onto the inner
RouterDelegate / Navigator.
* `nav_2_advanced/transition_delegate.dart` - Shows how a custom
TransitionDelegate can be used to customized when transition animations are
shown.
## Running
Each file in this project is an entrypoint. To run, specify the filename of
the sample:
```bash
flutter run lib/nav_2/router.dart
```
[article]: https://medium.com/flutter/learning-flutters-new-navigation-and-routing-system-7c9068155ade

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gradle-wrapper.jar
/.gradle
/captures/
/gradlew
/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

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navigation_and_routing/android/app/build.gradle
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def localProperties = new Properties()
def localPropertiesFile = rootProject.file('local.properties')
if (localPropertiesFile.exists()) {
localPropertiesFile.withReader('UTF-8') { reader ->
localProperties.load(reader)
}
}
def flutterRoot = localProperties.getProperty('flutter.sdk')
if (flutterRoot == null) {
throw new GradleException("Flutter SDK not found. Define location with flutter.sdk in the local.properties file.")
}
def flutterVersionCode = localProperties.getProperty('flutter.versionCode')
if (flutterVersionCode == null) {
flutterVersionCode = '1'
}
def flutterVersionName = localProperties.getProperty('flutter.versionName')
if (flutterVersionName == null) {
flutterVersionName = '1.0'
}
apply plugin: 'com.android.application'
apply plugin: 'kotlin-android'
apply from: "$flutterRoot/packages/flutter_tools/gradle/flutter.gradle"
android {
compileSdkVersion 29
sourceSets {
main.java.srcDirs += 'src/main/kotlin'
}
lintOptions {
disable 'InvalidPackage'
}
defaultConfig {
// TODO: Specify your own unique Application ID (https://developer.android.com/studio/build/application-id.html).
applicationId "com.example.navigation_and_routing"
minSdkVersion 16
targetSdkVersion 29
versionCode flutterVersionCode.toInteger()
versionName flutterVersionName
}
buildTypes {
release {
// TODO: Add your own signing config for the release build.
// Signing with the debug keys for now, so `flutter run --release` works.
signingConfig signingConfigs.debug
}
}
}
flutter {
source '../..'
}
dependencies {
implementation "org.jetbrains.kotlin:kotlin-stdlib-jdk7:$kotlin_version"
}

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navigation_and_routing/android/app/src/debug/AndroidManifest.xml
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<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.navigation_and_routing">
<!-- Flutter needs it to communicate with the running application
to allow setting breakpoints, to provide hot reload, etc.
-->
<uses-permission android:name="android.permission.INTERNET"/>
</manifest>

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navigation_and_routing/android/app/src/main/AndroidManifest.xml
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<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.navigation_and_routing">
<!-- 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"
android:label="navigation_and_routing"
android:icon="@mipmap/ic_launcher">
<activity
android:name=".MainActivity"
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"
/>
<!-- Displays an Android View that continues showing the launch screen
Drawable until Flutter paints its first frame, then this splash
screen fades out. A splash screen is useful to avoid any visual
gap between the end of Android's launch screen and the painting of
Flutter's first frame. -->
<meta-data
android:name="io.flutter.embedding.android.SplashScreenDrawable"
android:resource="@drawable/launch_background"
/>
<intent-filter>
<action android:name="android.intent.action.MAIN"/>
<category android:name="android.intent.category.LAUNCHER"/>
</intent-filter>
</activity>
<!-- Don't delete the meta-data below.
This is used by the Flutter tool to generate GeneratedPluginRegistrant.java -->
<meta-data
android:name="flutterEmbedding"
android:value="2" />
</application>
</manifest>

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navigation_and_routing/android/app/src/main/kotlin/com/example/navigation_and_routing/MainActivity.kt
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package com.example.navigation_and_routing
import io.flutter.embedding.android.FlutterActivity
class MainActivity: FlutterActivity() {
}

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<?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:color/white" />
<!-- You can insert your own image assets here -->
<!-- <item>
<bitmap
android:gravity="center"
android:src="@mipmap/launch_image" />
</item> -->
</layer-list>

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navigation_and_routing/android/app/src/main/res/values/styles.xml
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<?xml version="1.0" encoding="utf-8"?>
<resources>
<!-- Theme applied to the Android Window while the process is starting -->
<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:color/white</item>
</style>
</resources>

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navigation_and_routing/android/app/src/profile/AndroidManifest.xml
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<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.navigation_and_routing">
<!-- Flutter needs it to communicate with the running application
to allow setting breakpoints, to provide hot reload, etc.
-->
<uses-permission android:name="android.permission.INTERNET"/>
</manifest>

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navigation_and_routing/android/build.gradle
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buildscript {
ext.kotlin_version = '1.3.50'
repositories {
google()
jcenter()
}
dependencies {
classpath 'com.android.tools.build:gradle:3.5.0'
classpath "org.jetbrains.kotlin:kotlin-gradle-plugin:$kotlin_version"
}
}
allprojects {
repositories {
google()
jcenter()
}
}
rootProject.buildDir = '../build'
subprojects {
project.buildDir = "${rootProject.buildDir}/${project.name}"
}
subprojects {
project.evaluationDependsOn(':app')
}
task clean(type: Delete) {
delete rootProject.buildDir
}

3
navigation_and_routing/android/gradle.properties
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org.gradle.jvmargs=-Xmx1536M
android.useAndroidX=true
android.enableJetifier=true

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navigation_and_routing/android/gradle/wrapper/gradle-wrapper.properties vendored
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#Fri Jun 23 08:50:38 CEST 2017
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

11
navigation_and_routing/android/settings.gradle
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include ':app'
def localPropertiesFile = new File(rootProject.projectDir, "local.properties")
def properties = new Properties()
assert localPropertiesFile.exists()
localPropertiesFile.withReader("UTF-8") { reader -> properties.load(reader) }
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"

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navigation_and_routing/ios/Runner/Assets.xcassets/LaunchImage.imageset/Contents.json vendored
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{
"images" : [
{
"idiom" : "universal",
"filename" : "LaunchImage.png",
"scale" : "1x"
},
{
"idiom" : "universal",
"filename" : "LaunchImage@2x.png",
"scale" : "2x"
},
{
"idiom" : "universal",
"filename" : "LaunchImage@3x.png",
"scale" : "3x"
}
],
"info" : {
"version" : 1,
"author" : "xcode"
}
}

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navigation_and_routing/ios/Runner/Assets.xcassets/LaunchImage.imageset/README.md vendored
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# Launch Screen Assets
You can customize the launch screen with your own desired assets by replacing the image files in this directory.
You can also do it by opening your Flutter project's Xcode project with `open ios/Runner.xcworkspace`, selecting `Runner/Assets.xcassets` in the Project Navigator and dropping in the desired images.

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navigation_and_routing/ios/Runner/Base.lproj/LaunchScreen.storyboard
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<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="12121" systemVersion="16G29" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" launchScreen="YES" colorMatched="YES" initialViewController="01J-lp-oVM">
<dependencies>
<deployment identifier="iOS"/>
<plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="12089"/>
</dependencies>
<scenes>
<!--View Controller-->
<scene sceneID="EHf-IW-A2E">
<objects>
<viewController id="01J-lp-oVM" sceneMemberID="viewController">
<layoutGuides>
<viewControllerLayoutGuide type="top" id="Ydg-fD-yQy"/>
<viewControllerLayoutGuide type="bottom" id="xbc-2k-c8Z"/>
</layoutGuides>
<view key="view" contentMode="scaleToFill" id="Ze5-6b-2t3">
<autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
<subviews>
<imageView opaque="NO" clipsSubviews="YES" multipleTouchEnabled="YES" contentMode="center" image="LaunchImage" translatesAutoresizingMaskIntoConstraints="NO" id="YRO-k0-Ey4">
</imageView>
</subviews>
<color key="backgroundColor" red="1" green="1" blue="1" alpha="1" colorSpace="custom" customColorSpace="sRGB"/>
<constraints>
<constraint firstItem="YRO-k0-Ey4" firstAttribute="centerX" secondItem="Ze5-6b-2t3" secondAttribute="centerX" id="1a2-6s-vTC"/>
<constraint firstItem="YRO-k0-Ey4" firstAttribute="centerY" secondItem="Ze5-6b-2t3" secondAttribute="centerY" id="4X2-HB-R7a"/>
</constraints>
</view>
</viewController>
<placeholder placeholderIdentifier="IBFirstResponder" id="iYj-Kq-Ea1" userLabel="First Responder" sceneMemberID="firstResponder"/>
</objects>
<point key="canvasLocation" x="53" y="375"/>
</scene>
</scenes>
<resources>
<image name="LaunchImage" width="168" height="185"/>
</resources>
</document>

26
navigation_and_routing/ios/Runner/Base.lproj/Main.storyboard
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<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<document type="com.apple.InterfaceBuilder3.CocoaTouch.Storyboard.XIB" version="3.0" toolsVersion="10117" systemVersion="15F34" targetRuntime="iOS.CocoaTouch" propertyAccessControl="none" useAutolayout="YES" useTraitCollections="YES" initialViewController="BYZ-38-t0r">
<dependencies>
<deployment identifier="iOS"/>
<plugIn identifier="com.apple.InterfaceBuilder.IBCocoaTouchPlugin" version="10085"/>
</dependencies>
<scenes>
<!--Flutter View Controller-->
<scene sceneID="tne-QT-ifu">
<objects>
<viewController id="BYZ-38-t0r" customClass="FlutterViewController" sceneMemberID="viewController">
<layoutGuides>
<viewControllerLayoutGuide type="top" id="y3c-jy-aDJ"/>
<viewControllerLayoutGuide type="bottom" id="wfy-db-euE"/>
</layoutGuides>
<view key="view" contentMode="scaleToFill" id="8bC-Xf-vdC">
<rect key="frame" x="0.0" y="0.0" width="600" height="600"/>
<autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
<color key="backgroundColor" white="1" alpha="1" colorSpace="custom" customColorSpace="calibratedWhite"/>
</view>
</viewController>
<placeholder placeholderIdentifier="IBFirstResponder" id="dkx-z0-nzr" sceneMemberID="firstResponder"/>
</objects>
</scene>
</scenes>
</document>

45
navigation_and_routing/ios/Runner/Info.plist
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<?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>CFBundleDevelopmentRegion</key>
<string>$(DEVELOPMENT_LANGUAGE)</string>
<key>CFBundleExecutable</key>
<string>$(EXECUTABLE_NAME)</string>
<key>CFBundleIdentifier</key>
<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
<key>CFBundleInfoDictionaryVersion</key>
<string>6.0</string>
<key>CFBundleName</key>
<string>navigation_and_routing</string>
<key>CFBundlePackageType</key>
<string>APPL</string>
<key>CFBundleShortVersionString</key>
<string>$(FLUTTER_BUILD_NAME)</string>
<key>CFBundleSignature</key>
<string>????</string>
<key>CFBundleVersion</key>
<string>$(FLUTTER_BUILD_NUMBER)</string>
<key>LSRequiresIPhoneOS</key>
<true/>
<key>UILaunchStoryboardName</key>
<string>LaunchScreen</string>
<key>UIMainStoryboardFile</key>
<string>Main</string>
<key>UISupportedInterfaceOrientations</key>
<array>
<string>UIInterfaceOrientationPortrait</string>
<string>UIInterfaceOrientationLandscapeLeft</string>
<string>UIInterfaceOrientationLandscapeRight</string>
</array>
<key>UISupportedInterfaceOrientations~ipad</key>
<array>
<string>UIInterfaceOrientationPortrait</string>
<string>UIInterfaceOrientationPortraitUpsideDown</string>
<string>UIInterfaceOrientationLandscapeLeft</string>
<string>UIInterfaceOrientationLandscapeRight</string>
</array>
<key>UIViewControllerBasedStatusBarAppearance</key>
<false/>
</dict>
</plist>

1
navigation_and_routing/ios/Runner/Runner-Bridging-Header.h
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#import "GeneratedPluginRegistrant.h"

61
navigation_and_routing/lib/nav_1/anonymous_routes.dart
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// Copyright 2020, the Flutter project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
/// Shows how to use [Navigator] APIs to push and pop an anonymous
/// route. In this case, it is an instance of [MaterialPageRoute].
library anonymous_routes;
import 'package:flutter/material.dart';
void main() {
runApp(Nav2App());
}
class Nav2App extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
home: HomeScreen(),
);
}
}
class HomeScreen extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(),
body: Center(
child: FlatButton(
child: Text('View Details'),
onPressed: () {
Navigator.push(
context,
MaterialPageRoute(builder: (context) {
return DetailScreen();
}),
);
},
),
),
);
}
}
class DetailScreen extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(),
body: Center(
child: FlatButton(
child: Text('Pop!'),
onPressed: () {
Navigator.pop(context);
},
),
),
);
}
}

62
navigation_and_routing/lib/nav_1/named_routes.dart
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// Copyright 2020, the Flutter project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
/// Shows how to use define named routes via the `routes` parameter on
/// MaterialApp, and navigate using Navigator.pushNamed.
library named_routes;
import 'package:flutter/material.dart';
void main() {
runApp(Nav2App());
}
class Nav2App extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
routes: {
'/': (context) => HomeScreen(),
'/details': (context) => DetailScreen(),
},
);
}
}
class HomeScreen extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(),
body: Center(
child: FlatButton(
child: Text('View Details'),
onPressed: () {
Navigator.pushNamed(
context,
'/details',
);
},
),
),
);
}
}
class DetailScreen extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(),
body: Center(
child: FlatButton(
child: Text('Pop!'),
onPressed: () {
Navigator.pop(context);
},
),
),
);
}
}

98
navigation_and_routing/lib/nav_1/on_generate_route.dart
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// Copyright 2020, the Flutter project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
/// Shows how to handle arbitrary named routes using the `onGenerateRoute`
/// callback defined in the `MaterialApp` constructor.
library on_generate_route;
import 'package:flutter/material.dart';
void main() {
runApp(Nav2App());
}
class Nav2App extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
onGenerateRoute: (settings) {
// Handle '/'
if (settings.name == '/') {
return MaterialPageRoute(builder: (context) => HomeScreen());
}
// Handle '/details/:id'
var uri = Uri.parse(settings.name);
if (uri.pathSegments.length == 2 &&
uri.pathSegments.first == 'details') {
var id = uri.pathSegments[1];
return MaterialPageRoute(builder: (context) => DetailScreen(id: id));
}
return MaterialPageRoute(builder: (context) => UnknownScreen());
},
);
}
}
class HomeScreen extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(),
body: Center(
child: FlatButton(
child: Text('View Details'),
onPressed: () {
Navigator.pushNamed(
context,
'/details/1',
);
},
),
),
);
}
}
class DetailScreen extends StatelessWidget {
String id;
DetailScreen({
this.id,
});
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(),
body: Center(
child: Column(
mainAxisAlignment: MainAxisAlignment.center,
children: [
Text('Viewing details for item $id'),
FlatButton(
child: Text('Pop!'),
onPressed: () {
Navigator.pop(context);
},
),
],
),
),
);
}
}
class UnknownScreen extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(),
body: Center(
child: Text('404!'),
),
);
}
}

142
navigation_and_routing/lib/nav_2/pages.dart
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// Copyright 2020, the Flutter project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
/// Shows how to define a list of [Page] objects on Navigator declaratively.
library nav2_pages;
import 'package:flutter/material.dart';
void main() {
runApp(BooksApp());
}
class Book {
final String title;
final String author;
Book(this.title, this.author);
}
class BooksApp extends StatefulWidget {
@override
State<StatefulWidget> createState() => _BooksAppState();
}
class _BooksAppState extends State<BooksApp> {
Book _selectedBook;
List<Book> books = [
Book('Stranger in a Strange Land', 'Robert A. Heinlein'),
Book('Foundation', 'Isaac Asimov'),
Book('Fahrenheit 451', 'Ray Bradbury'),
];
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Books App',
home: Navigator(
pages: [
MaterialPage(
key: ValueKey('BooksListPage'),
child: BooksListScreen(
books: books,
onTapped: _handleBookTapped,
),
),
if (_selectedBook != null) BookDetailsPage(book: _selectedBook)
],
onPopPage: (route, result) {
if (!route.didPop(result)) {
return false;
}
// Update the list of pages by setting _selectedBook to null
setState(() {
_selectedBook = null;
});
return true;
},
),
);
}
void _handleBookTapped(Book book) {
setState(() {
_selectedBook = book;
});
}
}
class BookDetailsPage extends Page {
final Book book;
BookDetailsPage({
this.book,
}) : super(key: ValueKey(book));
Route createRoute(BuildContext context) {
return MaterialPageRoute(
settings: this,
builder: (BuildContext context) {
return BookDetailsScreen(book: book);
},
);
}
}
class BooksListScreen extends StatelessWidget {
final List<Book> books;
final ValueChanged<Book> onTapped;
BooksListScreen({
@required this.books,
@required this.onTapped,
});
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(),
body: ListView(
children: [
for (var book in books)
ListTile(
title: Text(book.title),
subtitle: Text(book.author),
onTap: () => onTapped(book),
)
],
),
);
}
}
class BookDetailsScreen extends StatelessWidget {
final Book book;
BookDetailsScreen({
@required this.book,
});
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(),
body: Padding(
padding: const EdgeInsets.all(8.0),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
if (book != null) ...[
Text(book.title, style: Theme.of(context).textTheme.headline6),
Text(book.author, style: Theme.of(context).textTheme.subtitle1),
],
],
),
),
);
}
}

263
navigation_and_routing/lib/nav_2/router.dart
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// Copyright 2020, the Flutter project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
/// Full sample that shows a custom RouteInformationParser and RouterDelegate
/// parsing named routes and declaratively building the stack of pages for the
/// [Navigator].
import 'package:flutter/material.dart';
void main() {
runApp(BooksApp());
}
class Book {
final String title;
final String author;
Book(this.title, this.author);
}
class BooksApp extends StatefulWidget {
@override
State<StatefulWidget> createState() => _BooksAppState();
}
class _BooksAppState extends State<BooksApp> {
BookRouterDelegate _routerDelegate = BookRouterDelegate();
BookRouteInformationParser _routeInformationParser =
BookRouteInformationParser();
@override
Widget build(BuildContext context) {
return MaterialApp.router(
title: 'Books App',
routerDelegate: _routerDelegate,
routeInformationParser: _routeInformationParser,
);
}
}
class BookRouteInformationParser extends RouteInformationParser<BookRoutePath> {
@override
Future<BookRoutePath> parseRouteInformation(
RouteInformation routeInformation) async {
final uri = Uri.parse(routeInformation.location);
// Handle '/'
if (uri.pathSegments.length == 0) {
return BookRoutePath.home();
}
// Handle '/book/:id'
if (uri.pathSegments.length == 2) {
if (uri.pathSegments[0] != 'book') return BookRoutePath.unknown();
var remaining = uri.pathSegments[1];
var id = int.tryParse(remaining);
if (id == null) return BookRoutePath.unknown();
return BookRoutePath.details(id);
}
// Handle unknown routes
return BookRoutePath.unknown();
}
@override
RouteInformation restoreRouteInformation(BookRoutePath path) {
if (path.isUnknown) {
return RouteInformation(location: '/404');
}
if (path.isHomePage) {
return RouteInformation(location: '/');
}
if (path.isDetailsPage) {
return RouteInformation(location: '/book/${path.id}');
}
return null;
}
}
class BookRouterDelegate extends RouterDelegate<BookRoutePath>
with ChangeNotifier, PopNavigatorRouterDelegateMixin<BookRoutePath> {
final GlobalKey<NavigatorState> navigatorKey;
Book _selectedBook;
bool show404 = false;
List<Book> books = [
Book('Stranger in a Strange Land', 'Robert A. Heinlein'),
Book('Foundation', 'Isaac Asimov'),
Book('Fahrenheit 451', 'Ray Bradbury'),
];
BookRouterDelegate() : navigatorKey = GlobalKey<NavigatorState>();
BookRoutePath get currentConfiguration {
if (show404) {
return BookRoutePath.unknown();
}
return _selectedBook == null
? BookRoutePath.home()
: BookRoutePath.details(books.indexOf(_selectedBook));
}
@override
Widget build(BuildContext context) {
return Navigator(
key: navigatorKey,
pages: [
MaterialPage(
key: ValueKey('BooksListPage'),
child: BooksListScreen(
books: books,
onTapped: _handleBookTapped,
),
),
if (show404)
MaterialPage(key: ValueKey('UnknownPage'), child: UnknownScreen())
else if (_selectedBook != null)
BookDetailsPage(book: _selectedBook)
],
onPopPage: (route, result) {
if (!route.didPop(result)) {
return false;
}
// Update the list of pages by setting _selectedBook to null
_selectedBook = null;
show404 = false;
notifyListeners();
return true;
},
);
}
@override
Future<void> setNewRoutePath(BookRoutePath path) async {
if (path.isUnknown) {
_selectedBook = null;
show404 = true;
return;
}
if (path.isDetailsPage) {
if (path.id < 0 || path.id > books.length - 1) {
show404 = true;
return;
}
_selectedBook = books[path.id];
} else {
_selectedBook = null;
}
show404 = false;
}
void _handleBookTapped(Book book) {
_selectedBook = book;
notifyListeners();
}
}
class BookDetailsPage extends Page {
final Book book;
BookDetailsPage({
this.book,
}) : super(key: ValueKey(book));
Route createRoute(BuildContext context) {
return MaterialPageRoute(
settings: this,
builder: (BuildContext context) {
return BookDetailsScreen(book: book);
},
);
}
}
class BookRoutePath {
final int id;
final bool isUnknown;
BookRoutePath.home()
: id = null,
isUnknown = false;
BookRoutePath.details(this.id) : isUnknown = false;
BookRoutePath.unknown()
: id = null,
isUnknown = true;
bool get isHomePage => id == null;
bool get isDetailsPage => id != null;
}
class BooksListScreen extends StatelessWidget {
final List<Book> books;
final ValueChanged<Book> onTapped;
BooksListScreen({
@required this.books,
@required this.onTapped,
});
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(),
body: ListView(
children: [
for (var book in books)
ListTile(
title: Text(book.title),
subtitle: Text(book.author),
onTap: () => onTapped(book),
)
],
),
);
}
}
class BookDetailsScreen extends StatelessWidget {
final Book book;
BookDetailsScreen({
@required this.book,
});
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(),
body: Padding(
padding: const EdgeInsets.all(8.0),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
if (book != null) ...[
Text(book.title, style: Theme.of(context).textTheme.headline6),
Text(book.author, style: Theme.of(context).textTheme.subtitle1),
],
],
),
),
);
}
}
class UnknownScreen extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(),
body: Center(
child: Text('404!'),
),
);
}
}

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navigation_and_routing/lib/nav_2_advanced/nested_router.dart
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// Copyright 2020, the Flutter project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
/// Shows two [RouterDelegate], one nested within the other. A
/// [BottomNavigationBar] can be used to select the route of the outer
/// RouterDelegate, and additional routes can be pushed onto the inner
/// RouterDelegate / Navigator.
import 'package:flutter/material.dart';
void main() {
runApp(NestedRouterDemo());
}
class Book {
final String title;
final String author;
Book(this.title, this.author);
}
class NestedRouterDemo extends StatefulWidget {
@override
_NestedRouterDemoState createState() => _NestedRouterDemoState();
}
class _NestedRouterDemoState extends State<NestedRouterDemo> {
BookRouterDelegate _routerDelegate = BookRouterDelegate();
BookRouteInformationParser _routeInformationParser =
BookRouteInformationParser();
@override
Widget build(BuildContext context) {
return MaterialApp.router(
title: 'Books App',
routerDelegate: _routerDelegate,
routeInformationParser: _routeInformationParser,
);
}
}
class BooksAppState extends ChangeNotifier {
int _selectedIndex;
Book _selectedBook;
final List<Book> books = [
Book('Stranger in a Strange Land', 'Robert A. Heinlein'),
Book('Foundation', 'Isaac Asimov'),
Book('Fahrenheit 451', 'Ray Bradbury'),
];
BooksAppState() : _selectedIndex = 0;
int get selectedIndex => _selectedIndex;
set selectedIndex(int idx) {
_selectedIndex = idx;
if (_selectedIndex == 1) {
// Remove this line if you want to keep the selected book when navigating
// between "settings" and "home" which book was selected when Settings is
// tapped.
selectedBook = null;
}
notifyListeners();
}
Book get selectedBook => _selectedBook;
set selectedBook(Book book) {
_selectedBook = book;
notifyListeners();
}
int getSelectedBookById() {
if (!books.contains(_selectedBook)) return 0;
return books.indexOf(_selectedBook);
}
void setSelectedBookById(int id) {
if (id < 0 || id > books.length - 1) {
return;
}
_selectedBook = books[id];
notifyListeners();
}
}
class BookRouteInformationParser extends RouteInformationParser<BookRoutePath> {
@override
Future<BookRoutePath> parseRouteInformation(
RouteInformation routeInformation) async {
final uri = Uri.parse(routeInformation.location);
if (uri.pathSegments.isNotEmpty && uri.pathSegments.first == 'settings') {
return BooksSettingsPath();
} else {
if (uri.pathSegments.length >= 2) {
if (uri.pathSegments[0] == 'book') {
return BooksDetailsPath(int.tryParse(uri.pathSegments[1]));
}
}
return BooksListPath();
}
}
@override
RouteInformation restoreRouteInformation(BookRoutePath configuration) {
if (configuration is BooksListPath) {
return RouteInformation(location: '/home');
}
if (configuration is BooksSettingsPath) {
return RouteInformation(location: '/settings');
}
if (configuration is BooksDetailsPath) {
return RouteInformation(location: '/book/${configuration.id}');
}
return null;
}
}
class BookRouterDelegate extends RouterDelegate<BookRoutePath>
with ChangeNotifier, PopNavigatorRouterDelegateMixin<BookRoutePath> {
final GlobalKey<NavigatorState> navigatorKey;
BooksAppState appState = BooksAppState();
BookRouterDelegate() : navigatorKey = GlobalKey<NavigatorState>() {
appState.addListener(notifyListeners);
}
BookRoutePath get currentConfiguration {
if (appState.selectedIndex == 1) {
return BooksSettingsPath();
} else {
if (appState.selectedBook == null) {
return BooksListPath();
} else {
return BooksDetailsPath(appState.getSelectedBookById());
}
}
}
@override
Widget build(BuildContext context) {
return Navigator(
key: navigatorKey,
pages: [
MaterialPage(
child: AppShell(appState: appState),
),
],
onPopPage: (route, result) {
if (!route.didPop(result)) {
return false;
}
if (appState.selectedBook != null) {
appState.selectedBook = null;
}
notifyListeners();
return true;
},
);
}
@override
Future<void> setNewRoutePath(BookRoutePath path) async {
if (path is BooksListPath) {
appState.selectedIndex = 0;
appState.selectedBook = null;
} else if (path is BooksSettingsPath) {
appState.selectedIndex = 1;
} else if (path is BooksDetailsPath) {
appState.setSelectedBookById(path.id);
}
}
}
// Routes
abstract class BookRoutePath {}
class BooksListPath extends BookRoutePath {}
class BooksSettingsPath extends BookRoutePath {}
class BooksDetailsPath extends BookRoutePath {
final int id;
BooksDetailsPath(this.id);
}
// Widget that contains the AdaptiveNavigationScaffold
class AppShell extends StatefulWidget {
final BooksAppState appState;
AppShell({
@required this.appState,
});
@override
_AppShellState createState() => _AppShellState();
}
class _AppShellState extends State<AppShell> {
InnerRouterDelegate _routerDelegate;
ChildBackButtonDispatcher _backButtonDispatcher;
void initState() {
super.initState();
_routerDelegate = InnerRouterDelegate(widget.appState);
}
@override
void didUpdateWidget(covariant AppShell oldWidget) {
super.didUpdateWidget(oldWidget);
_routerDelegate.appState = widget.appState;
}
@override
void didChangeDependencies() {
super.didChangeDependencies();
// Defer back button dispatching to the child router
_backButtonDispatcher = Router.of(context)
.backButtonDispatcher
.createChildBackButtonDispatcher();
}
@override
Widget build(BuildContext context) {
var appState = widget.appState;
// Claim priority, If there are parallel sub router, you will need
// to pick which one should take priority;
_backButtonDispatcher.takePriority();
return Scaffold(
appBar: AppBar(),
body: Router(
routerDelegate: _routerDelegate,
backButtonDispatcher: _backButtonDispatcher,
),
bottomNavigationBar: BottomNavigationBar(
items: [
BottomNavigationBarItem(icon: Icon(Icons.home), label: 'Home'),
BottomNavigationBarItem(
icon: Icon(Icons.settings), label: 'Settings'),
],
currentIndex: appState.selectedIndex,
onTap: (newIndex) {
appState.selectedIndex = newIndex;
},
),
);
}
}
class InnerRouterDelegate extends RouterDelegate<BookRoutePath>
with ChangeNotifier, PopNavigatorRouterDelegateMixin<BookRoutePath> {
final GlobalKey<NavigatorState> navigatorKey = GlobalKey<NavigatorState>();
BooksAppState get appState => _appState;
BooksAppState _appState;
set appState(BooksAppState value) {
if (value == _appState) {
return;
}
_appState = value;
notifyListeners();
}
InnerRouterDelegate(this._appState);
@override
Widget build(BuildContext context) {
return Navigator(
key: navigatorKey,
pages: [
if (appState.selectedIndex == 0) ...[
FadeAnimationPage(
child: BooksListScreen(
books: appState.books,
onTapped: _handleBookTapped,
),
key: ValueKey('BooksListPage'),
),
if (appState.selectedBook != null)
MaterialPage(
key: ValueKey(appState.selectedBook),
child: BookDetailsScreen(book: appState.selectedBook),
),
] else
FadeAnimationPage(
child: SettingsScreen(),
key: ValueKey('SettingsPage'),
),
],
onPopPage: (route, result) {
appState.selectedBook = null;
notifyListeners();
return route.didPop(result);
},
);
}
@override
Future<void> setNewRoutePath(BookRoutePath path) async {
// This is not required for inner router delegate because it does not
// parse route
assert(false);
}
void _handleBookTapped(Book book) {
appState.selectedBook = book;
notifyListeners();
}
}
class FadeAnimationPage extends Page {
final Widget child;
FadeAnimationPage({Key key, this.child}) : super(key: key);
Route createRoute(BuildContext context) {
return PageRouteBuilder(
settings: this,
pageBuilder: (context, animation, animation2) {
var curveTween = CurveTween(curve: Curves.easeIn);
return FadeTransition(
opacity: animation.drive(curveTween),
child: child,
);
},
);
}
}
// Screens
class BooksListScreen extends StatelessWidget {
final List<Book> books;
final ValueChanged<Book> onTapped;
BooksListScreen({
@required this.books,
@required this.onTapped,
});
@override
Widget build(BuildContext context) {
return Scaffold(
body: ListView(
children: [
for (var book in books)
ListTile(
title: Text(book.title),
subtitle: Text(book.author),
onTap: () => onTapped(book),
)
],
),
);
}
}
class BookDetailsScreen extends StatelessWidget {
final Book book;
BookDetailsScreen({
@required this.book,
});
@override
Widget build(BuildContext context) {
return Scaffold(
body: Padding(
padding: const EdgeInsets.all(8.0),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
FlatButton(
onPressed: () {
Navigator.of(context).pop();
},
child: Text('Back'),
),
if (book != null) ...[
Text(book.title, style: Theme.of(context).textTheme.headline6),
Text(book.author, style: Theme.of(context).textTheme.subtitle1),
],
],
),
),
);
}
}
class SettingsScreen extends StatelessWidget {
@override
Widget build(BuildContext context) {
return Scaffold(
body: Center(
child: Text('Settings screen'),
),
);
}
}

244
navigation_and_routing/lib/nav_2_advanced/transition_delegate.dart
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// Copyright 2020, the Flutter project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
/// Shows how a custom TransitionDelegate can be used to customized when
/// transition animations are shown. (For example, [when two routes are popped
/// off the stack](https://github.com/flutter/flutter/issues/12146), however the
/// default TransitionDelegate will handle this if you are using Navigator 2.0)
import 'package:flutter/material.dart';
void main() {
runApp(BooksApp());
}
class Book {
final String title;
final String author;
Book(this.title, this.author);
}
class BooksApp extends StatefulWidget {
@override
State<StatefulWidget> createState() => _BooksAppState();
}
class _BooksAppState extends State<BooksApp> {
BookRouterDelegate _routerDelegate = BookRouterDelegate();
BookRouteInformationParser _routeInformationParser =
BookRouteInformationParser();
@override
Widget build(BuildContext context) {
return MaterialApp.router(
title: 'Books App',
routerDelegate: _routerDelegate,
routeInformationParser: _routeInformationParser,
);
}
}
class BookRouteInformationParser extends RouteInformationParser<BookRoutePath> {
@override
Future<BookRoutePath> parseRouteInformation(
RouteInformation routeInformation) async {
final uri = Uri.parse(routeInformation.location);
if (uri.pathSegments.length >= 2) {
var remaining = uri.pathSegments[1];
return BookRoutePath.details(int.tryParse(remaining));
} else {
return BookRoutePath.home();
}
}
@override
RouteInformation restoreRouteInformation(BookRoutePath path) {
if (path.isHomePage) {
return RouteInformation(location: '/');
}
if (path.isDetailsPage) {
return RouteInformation(location: '/book/${path.id}');
}
return null;
}
}
class BookRouterDelegate extends RouterDelegate<BookRoutePath>
with ChangeNotifier, PopNavigatorRouterDelegateMixin<BookRoutePath> {
final GlobalKey<NavigatorState> navigatorKey;
Book _selectedBook;
List<Book> books = [
Book('Stranger in a Strange Land', 'Robert A. Heinlein'),
Book('Foundation', 'Isaac Asimov'),
Book('Fahrenheit 451', 'Ray Bradbury'),
];
BookRouterDelegate() : navigatorKey = GlobalKey<NavigatorState>();
BookRoutePath get currentConfiguration => _selectedBook == null
? BookRoutePath.home()
: BookRoutePath.details(books.indexOf(_selectedBook));
@override
Widget build(BuildContext context) {
return Navigator(
key: navigatorKey,
transitionDelegate: NoAnimationTransitionDelegate(),
pages: [
MaterialPage(
key: ValueKey('BooksListPage'),
child: BooksListScreen(
books: books,
onTapped: _handleBookTapped,
),
),
if (_selectedBook != null) BookDetailsPage(book: _selectedBook)
],
onPopPage: (route, result) {
if (!route.didPop(result)) {
return false;
}
// Update the list of pages by setting _selectedBook to null
_selectedBook = null;
notifyListeners();
return true;
},
);
}
@override
Future<void> setNewRoutePath(BookRoutePath path) async {
if (path.isDetailsPage) {
_selectedBook = books[path.id];
}
}
void _handleBookTapped(Book book) {
_selectedBook = book;
notifyListeners();
}
}
class BookDetailsPage extends Page {
final Book book;
BookDetailsPage({
this.book,
}) : super(key: ValueKey(book));
Route createRoute(BuildContext context) {
return MaterialPageRoute(
settings: this,
builder: (BuildContext context) {
return BookDetailsScreen(book: book);
},
);
}
}
class BookRoutePath {
final int id;
BookRoutePath.home() : id = null;
BookRoutePath.details(this.id);
bool get isHomePage => id == null;
bool get isDetailsPage => id != null;
}
class BooksListScreen extends StatelessWidget {
final List<Book> books;
final ValueChanged<Book> onTapped;
BooksListScreen({
@required this.books,
@required this.onTapped,
});
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(),
body: ListView(
children: [
for (var book in books)
ListTile(
title: Text(book.title),
subtitle: Text(book.author),
onTap: () => onTapped(book),
)
],
),
);
}
}
class BookDetailsScreen extends StatelessWidget {
final Book book;
BookDetailsScreen({
@required this.book,
});
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(),
body: Padding(
padding: const EdgeInsets.all(8.0),
child: Column(
crossAxisAlignment: CrossAxisAlignment.start,
children: [
if (book != null) ...[
Text(book.title, style: Theme.of(context).textTheme.headline6),
Text(book.author, style: Theme.of(context).textTheme.subtitle1),
],
],
),
),
);
}
}
class NoAnimationTransitionDelegate extends TransitionDelegate<void> {
@override
Iterable<RouteTransitionRecord> resolve({
List<RouteTransitionRecord> newPageRouteHistory,
Map<RouteTransitionRecord, RouteTransitionRecord>
locationToExitingPageRoute,
Map<RouteTransitionRecord, List<RouteTransitionRecord>>
pageRouteToPagelessRoutes,
}) {
final results = <RouteTransitionRecord>[];
for (final pageRoute in newPageRouteHistory) {
if (pageRoute.isWaitingForEnteringDecision) {
pageRoute.markForAdd();
}
results.add(pageRoute);
}
for (final exitingPageRoute in locationToExitingPageRoute.values) {
if (exitingPageRoute.isWaitingForExitingDecision) {
exitingPageRoute.markForRemove();
final pagelessRoutes = pageRouteToPagelessRoutes[exitingPageRoute];
if (pagelessRoutes != null) {
for (final pagelessRoute in pagelessRoutes) {
pagelessRoute.markForRemove();
}
}
}
results.add(exitingPageRoute);
}
return results;
}
}

153
navigation_and_routing/pubspec.lock
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@ -0,0 +1,153 @@
# Generated by pub
# See https://dart.dev/tools/pub/glossary#lockfile
packages:
async:
dependency: transitive
description:
name: async
url: "https://pub.dartlang.org"
source: hosted
version: "2.5.0-nullsafety.1"
boolean_selector:
dependency: transitive
description:
name: boolean_selector
url: "https://pub.dartlang.org"
source: hosted
version: "2.1.0-nullsafety.1"
characters:
dependency: transitive
description:
name: characters
url: "https://pub.dartlang.org"
source: hosted
version: "1.1.0-nullsafety.3"
charcode:
dependency: transitive
description:
name: charcode
url: "https://pub.dartlang.org"
source: hosted
version: "1.2.0-nullsafety.1"
clock:
dependency: transitive
description:
name: clock
url: "https://pub.dartlang.org"
source: hosted
version: "1.1.0-nullsafety.1"
collection:
dependency: transitive
description:
name: collection
url: "https://pub.dartlang.org"
source: hosted
version: "1.15.0-nullsafety.3"
cupertino_icons:
dependency: "direct main"
description:
name: cupertino_icons
url: "https://pub.dartlang.org"
source: hosted
version: "1.0.0"
fake_async:
dependency: transitive
description:
name: fake_async
url: "https://pub.dartlang.org"
source: hosted
version: "1.2.0-nullsafety.1"
flutter:
dependency: "direct main"
description: flutter
source: sdk
version: "0.0.0"
flutter_test:
dependency: "direct dev"
description: flutter
source: sdk
version: "0.0.0"
matcher:
dependency: transitive
description:
name: matcher
url: "https://pub.dartlang.org"
source: hosted
version: "0.12.10-nullsafety.1"
meta:
dependency: transitive
description:
name: meta
url: "https://pub.dartlang.org"
source: hosted
version: "1.3.0-nullsafety.3"
path:
dependency: transitive
description:
name: path
url: "https://pub.dartlang.org"
source: hosted
version: "1.8.0-nullsafety.1"
sky_engine:
dependency: transitive
description: flutter
source: sdk
version: "0.0.99"
source_span:
dependency: transitive
description:
name: source_span
url: "https://pub.dartlang.org"
source: hosted
version: "1.8.0-nullsafety.2"
stack_trace:
dependency: transitive
description:
name: stack_trace
url: "https://pub.dartlang.org"
source: hosted
version: "1.10.0-nullsafety.1"
stream_channel:
dependency: transitive
description:
name: stream_channel
url: "https://pub.dartlang.org"
source: hosted
version: "2.1.0-nullsafety.1"
string_scanner:
dependency: transitive
description:
name: string_scanner
url: "https://pub.dartlang.org"
source: hosted
version: "1.1.0-nullsafety.1"
term_glyph:
dependency: transitive
description:
name: term_glyph
url: "https://pub.dartlang.org"
source: hosted
version: "1.2.0-nullsafety.1"
test_api:
dependency: transitive
description:
name: test_api
url: "https://pub.dartlang.org"
source: hosted
version: "0.2.19-nullsafety.2"
typed_data:
dependency: transitive
description:
name: typed_data
url: "https://pub.dartlang.org"
source: hosted
version: "1.3.0-nullsafety.3"
vector_math:
dependency: transitive
description:
name: vector_math
url: "https://pub.dartlang.org"
source: hosted
version: "2.1.0-nullsafety.3"
sdks:
dart: ">=2.10.0-110 <2.11.0"

20
navigation_and_routing/pubspec.yaml
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@ -0,0 +1,20 @@
name: navigation_and_routing
description: Navigation and routing samples
publish_to: 'none'
version: 1.0.0+1
environment:
sdk: ">=2.7.0 <3.0.0"
dependencies:
flutter:
sdk: flutter
cupertino_icons: ^1.0.0
dev_dependencies:
flutter_test:
sdk: flutter
flutter:
uses-material-design: true
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