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[url_launcher] Update README to use code excerpts. (flutter#6042)
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‎packages/url_launcher/url_launcher/CHANGELOG.md‎

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## 6.1.5
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* Migrates `README.md` examples to the [`code-excerpt` system](https://github.com/flutter/flutter/wiki/Contributing-to-Plugins-and-Packages#readme-code).
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## 6.1.4
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* Adopts new platform interface method for launching URLs.

‎packages/url_launcher/url_launcher/README.md‎

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<?code-excerpt path-base="excerpts/packages/url_launcher_example"?>
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# url_launcher
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[![pub package](https://img.shields.io/pub/v/url_launcher.svg)](https://pub.dev/packages/url_launcher)
@@ -14,6 +16,7 @@ To use this plugin, add `url_launcher` as a [dependency in your pubspec.yaml fil
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### Example
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<?code-excerpt "basic.dart (basic-example)"?>
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``` dart
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import 'package:flutter/material.dart';
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import 'package:url_launcher/url_launcher.dart';
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const MaterialApp(
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home: Material(
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child: Center(
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child: RaisedButton(
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child: ElevatedButton(
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onPressed: _launchUrl,
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child: Text('Show Flutter homepage'),
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),
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),
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);
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void _launchUrl() async {
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if (!await launchUrl(_url)) throw 'Could not launch $_url';
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Future<void> _launchUrl() async {
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if (!await launchUrl(_url)) {
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throw 'Could not launch $_url';
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}
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}
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```
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@@ -65,7 +70,10 @@ on Android 11 (API 30) or higher. A `<queries>`
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element must be added to your manifest as a child of the root element.
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Example:
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<?code-excerpt "../../android/app/src/main/AndroidManifest.xml (android-queries)" plaster="none"?>
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``` xml
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<!-- Provide required visibility configuration for API level 30 and above -->
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<queries>
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<!-- If your app checks for SMS support -->
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<intent>
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encodes query parameters. Using `queryParameters` will result in spaces being
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converted to `+` in many cases.
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<?code-excerpt "encoding.dart (encode-query-parameters)"?>
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```dart
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String? encodeQueryParameters(Map<String, String> params) {
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return params.entries
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.map((e) => '${Uri.encodeComponent(e.key)}=${Uri.encodeComponent(e.value)}')
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.map((MapEntry<String, String> e) =>
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'${Uri.encodeComponent(e.key)}=${Uri.encodeComponent(e.value)}')
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.join('&');
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}
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// ···
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final Uri emailLaunchUri = Uri(
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scheme: 'mailto',
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path: 'smith@example.com',
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query: encodeQueryParameters(<String, String>{
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'subject': 'Example Subject & Symbols are allowed!',
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}),
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);
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launchUrl(emailLaunchUri);
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```
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final Uri emailLaunchUri = Uri(
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scheme: 'mailto',
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path: 'smith@example.com',
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query: encodeQueryParameters(<String, String>{
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'subject': 'Example Subject & Symbols are allowed!'
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}),
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);
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Encoding for `sms` is slightly different:
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launchUrl(emailLaunchUri);
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<?code-excerpt "encoding.dart (sms)"?>
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```dart
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final Uri smsLaunchUri = Uri(
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scheme: 'sms',
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path: '0118 999 881 999 119 7253',
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queryParameters: <String, String>{
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'body': Uri.encodeComponent('Example Subject & Symbols are allowed!'),
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},
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);
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```
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### URLs not handled by `Uri`
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We recommend checking first whether the directory or file exists before calling `launchUrl`.
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Example:
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<?code-excerpt "files.dart (file)"?>
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```dart
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var filePath = '/path/to/file';
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final String filePath = testFile.absolute.path;
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final Uri uri = Uri.file(filePath);
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if (await File(uri.toFilePath()).exists()) {
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if (!await launchUrl(uri)) {
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throw 'Could not launch $uri';
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}
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if (!File(uri.toFilePath()).existsSync()) {
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throw '$uri does not exist!';
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}
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if (!await launchUrl(uri)) {
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throw 'Could not launch $uri';
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}
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```
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‎packages/url_launcher/url_launcher/example/android/app/src/main/AndroidManifest.xml‎

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-->
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<uses-permission android:name="android.permission.INTERNET"/>
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<!--#docregion android-queries-->
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<!-- Provide required visibility configuration for API level 30 and above -->
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<queries>
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<!-- If your app checks for SMS support -->
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<intent>
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<action android:name="android.intent.action.VIEW" />
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<data android:scheme="https" />
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<data android:scheme="sms" />
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</intent>
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<!-- If your app checks for call support -->
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<intent>
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<action android:name="android.intent.action.VIEW" />
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<data android:scheme="tel" />
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</intent>
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<!--#enddocregion android-queries-->
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<!-- The "https" scheme is only required for integration tests of this package.
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It shouldn't be needed in most actual apps, or show up in the README! -->
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<intent>
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<action android:name="android.intent.action.VIEW" />
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<data android:scheme="sms" />
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<data android:scheme="https" />
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</intent>
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<!--#docregion android-queries-->
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</queries>
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<!--#enddocregion android-queries-->
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<application
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android:icon="@mipmap/ic_launcher"

‎packages/url_launcher/url_launcher/example/build.excerpt.yaml‎

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targets:
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$default:
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sources:
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include:
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- lib/**
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- android/app/src/main/**
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# Some default includes that aren't really used here but will prevent
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# false-negative warnings:
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- $package$
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- lib/$lib$
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exclude:
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- '**/.*/**'
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- '**/build/**'
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- 'android/app/src/main/res/**'
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builders:
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code_excerpter|code_excerpter:
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enabled: true
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generate_for:
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- '**/*.dart'
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- android/**/*.xml

‎packages/url_launcher/url_launcher/example/lib/basic.dart‎

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// Copyright 2013 The Flutter Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Run this example with: flutter run -t lib/basic.dart -d emulator
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// This file is used to extract code samples for the README.md file.
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// Run update-excerpts if you modify this file.
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// #docregion basic-example
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import 'package:flutter/material.dart';
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import 'package:url_launcher/url_launcher.dart';
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final Uri _url = Uri.parse('https://flutter.dev');
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void main() => runApp(
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const MaterialApp(
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home: Material(
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child: Center(
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child: ElevatedButton(
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onPressed: _launchUrl,
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child: Text('Show Flutter homepage'),
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),
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),
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),
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),
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);
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Future<void> _launchUrl() async {
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if (!await launchUrl(_url)) {
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throw 'Could not launch $_url';
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}
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}
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// #enddocregion basic-example

‎packages/url_launcher/url_launcher/example/lib/encoding.dart‎

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// Copyright 2013 The Flutter Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Run this example with: flutter run -t lib/encoding.dart -d emulator
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// This file is used to extract code samples for the README.md file.
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// Run update-excerpts if you modify this file.
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import 'package:flutter/material.dart';
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import 'package:url_launcher/url_launcher.dart';
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/// Encode [params] so it produces a correct query string.
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/// Workaround for: https://github.com/dart-lang/sdk/issues/43838
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// #docregion encode-query-parameters
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String? encodeQueryParameters(Map<String, String> params) {
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return params.entries
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.map((MapEntry<String, String> e) =>
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'${Uri.encodeComponent(e.key)}=${Uri.encodeComponent(e.value)}')
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.join('&');
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}
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// #enddocregion encode-query-parameters
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void main() => runApp(
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MaterialApp(
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home: Material(
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child: Column(
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mainAxisAlignment: MainAxisAlignment.spaceEvenly,
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children: const <Widget>[
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ElevatedButton(
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onPressed: _composeMail,
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child: Text('Compose an email'),
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),
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ElevatedButton(
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onPressed: _composeSms,
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child: Text('Compose a SMS'),
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),
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],
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),
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),
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),
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);
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void _composeMail() {
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// #docregion encode-query-parameters
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final Uri emailLaunchUri = Uri(
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scheme: 'mailto',
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path: 'smith@example.com',
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query: encodeQueryParameters(<String, String>{
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'subject': 'Example Subject & Symbols are allowed!',
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}),
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);
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launchUrl(emailLaunchUri);
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// #enddocregion encode-query-parameters
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}
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void _composeSms() {
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// #docregion sms
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final Uri smsLaunchUri = Uri(
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scheme: 'sms',
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path: '0118 999 881 999 119 7253',
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queryParameters: <String, String>{
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'body': Uri.encodeComponent('Example Subject & Symbols are allowed!'),
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},
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);
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// #enddocregion sms
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launchUrl(smsLaunchUri);
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}

‎packages/url_launcher/url_launcher/example/lib/files.dart‎

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// Copyright 2013 The Flutter Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Run this example with: flutter run -t lib/files.dart -d linux
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// This file is used to extract code samples for the README.md file.
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// Run update-excerpts if you modify this file.
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import 'dart:io';
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import 'package:flutter/material.dart';
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import 'package:path/path.dart' as p;
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import 'package:url_launcher/url_launcher.dart';
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void main() => runApp(
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const MaterialApp(
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home: Material(
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child: Center(
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child: ElevatedButton(
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onPressed: _openFile,
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child: Text('Open File'),
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),
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),
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),
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),
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);
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Future<void> _openFile() async {
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// Prepare a file within tmp
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final String tempFilePath = p.joinAll(<String>[
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...p.split(Directory.systemTemp.path),
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'flutter_url_launcher_example.txt'
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]);
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final File testFile = File(tempFilePath);
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await testFile.writeAsString('Hello, world!');
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// #docregion file
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final String filePath = testFile.absolute.path;
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final Uri uri = Uri.file(filePath);
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if (!File(uri.toFilePath()).existsSync()) {
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throw '$uri does not exist!';
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}
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if (!await launchUrl(uri)) {
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throw 'Could not launch $uri';
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}
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// #enddocregion file
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}

‎packages/url_launcher/url_launcher/example/linux/flutter/generated_plugins.cmake‎

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url_launcher_linux
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)
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list(APPEND FLUTTER_FFI_PLUGIN_LIST
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)
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set(PLUGIN_BUNDLED_LIBRARIES)
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foreach(plugin ${FLUTTER_PLUGIN_LIST})
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list(APPEND PLUGIN_BUNDLED_LIBRARIES $<TARGET_FILE:${plugin}_plugin>)
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list(APPEND PLUGIN_BUNDLED_LIBRARIES ${${plugin}_bundled_libraries})
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endforeach(plugin)
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foreach(ffi_plugin ${FLUTTER_FFI_PLUGIN_LIST})
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add_subdirectory(flutter/ephemeral/.plugin_symlinks/${ffi_plugin}/linux plugins/${ffi_plugin})
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list(APPEND PLUGIN_BUNDLED_LIBRARIES ${${ffi_plugin}_bundled_libraries})
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endforeach(ffi_plugin)

‎packages/url_launcher/url_launcher/example/pubspec.yaml‎

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dependencies:
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flutter:
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sdk: flutter
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path: ^1.8.0
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url_launcher:
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# When depending on this package from a real application you should use:
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# url_launcher: ^x.y.z
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path: ../
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dev_dependencies:
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build_runner: ^2.1.10
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flutter_driver:
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sdk: flutter
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integration_test:

‎packages/url_launcher/url_launcher/example/windows/flutter/generated_plugins.cmake‎

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url_launcher_windows
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)
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list(APPEND FLUTTER_FFI_PLUGIN_LIST
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)
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set(PLUGIN_BUNDLED_LIBRARIES)
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foreach(plugin ${FLUTTER_PLUGIN_LIST})
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list(APPEND PLUGIN_BUNDLED_LIBRARIES $<TARGET_FILE:${plugin}_plugin>)
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list(APPEND PLUGIN_BUNDLED_LIBRARIES ${${plugin}_bundled_libraries})
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endforeach(plugin)
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foreach(ffi_plugin ${FLUTTER_FFI_PLUGIN_LIST})
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add_subdirectory(flutter/ephemeral/.plugin_symlinks/${ffi_plugin}/windows plugins/${ffi_plugin})
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list(APPEND PLUGIN_BUNDLED_LIBRARIES ${${ffi_plugin}_bundled_libraries})
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endforeach(ffi_plugin)

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