blob: bd4c2a5ff45b5f969e8b9e7cefccc9055d6623fd [file] [log] [blame]
// Copyright 2013 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
import 'dart:async';
import 'package:flutter/services.dart';
import 'package:url_launcher_platform_interface/link.dart';
import 'package:url_launcher_platform_interface/url_launcher_platform_interface.dart';
const MethodChannel _channel =
/// An implementation of [UrlLauncherPlatform] for Android.
class UrlLauncherAndroid extends UrlLauncherPlatform {
/// Registers this class as the default instance of [UrlLauncherPlatform].
static void registerWith() {
UrlLauncherPlatform.instance = UrlLauncherAndroid();
final LinkDelegate? linkDelegate = null;
Future<bool> canLaunch(String url) async {
final bool canLaunchSpecificUrl = await _canLaunchUrl(url);
if (!canLaunchSpecificUrl) {
final String scheme = _getUrlScheme(url);
// canLaunch can return false when a custom application is registered to
// handle a web URL, but the caller doesn't have permission to see what
// that handler is. If that happens, try a web URL (with the same scheme
// variant, to be safe) that should not have a custom handler. If that
// returns true, then there is a browser, which means that there is
// at least one handler for the original URL.
if (scheme == 'http' || scheme == 'https') {
return _canLaunchUrl('$scheme://');
return canLaunchSpecificUrl;
Future<bool> _canLaunchUrl(String url) {
return _channel.invokeMethod<bool>(
<String, Object>{'url': url},
).then((bool? value) => value ?? false);
Future<void> closeWebView() {
return _channel.invokeMethod<void>('closeWebView');
Future<bool> launch(
String url, {
required bool useSafariVC,
required bool useWebView,
required bool enableJavaScript,
required bool enableDomStorage,
required bool universalLinksOnly,
required Map<String, String> headers,
String? webOnlyWindowName,
}) {
return _channel.invokeMethod<bool>(
<String, Object>{
'url': url,
'useWebView': useWebView,
'enableJavaScript': enableJavaScript,
'enableDomStorage': enableDomStorage,
'universalLinksOnly': universalLinksOnly,
'headers': headers,
).then((bool? value) => value ?? false);
// Returns the part of [url] up to the first ':', or an empty string if there
// is no ':'. This deliberately does not use [Uri] to extract the scheme
// so that it works on strings that aren't actually valid URLs, since Android
// is very lenient about what it accepts for launching.
String _getUrlScheme(String url) {
final int schemeEnd = url.indexOf(':');
if (schemeEnd == -1) {
return '';
return url.substring(0, schemeEnd);