Flutterでブラウザなどからシェアでアプリに情報を渡す

自己紹介

はじめましての方もそうでない方も、レシピサイトやSNSなどメニューを横断的に取り込める

おうちメニュー

というプロダクトをやっているkentarohです。

iOS	Android

本題

プロダクトマーケットフィットを目指すためUXの改善をし続けています。
今回は、ブラウザでレシピ見つけて取り込むために、ブラウザからアプリを起動してすぐレシピを取り込めるというストーリーを実現します。
AndroidだとIntent、iOSだとShare Extensionという仕組みを使って実現していきます。
今回もreceive_sharing_intentというライブラリの最新1.4.5を実際に実装したので紹介したいと思います。

前提

receive_sharing_intent:1.4.5を使います。

手順

1. Flutter側の実装
   1.1. packageの追加
   1.2. main.dartの編集
2. iOSの設定・実装
   2.1. Info.plistに設定追加
   2.2. XcodeからShare Extensionの追加
   2.3. 追加したShare ExtensionアプリのInfo.plistに設定追加
   2.4. 追加したShare　ExtensionアプリのViewControllerを修正
   2.5. 本アプリとShare Extensionアプリを同じグループに入れる
   2.6. その他注意事項
3. Androidの設定・実装
   3.1. AndroidManifest.xmlを修正

1 Flutter側の実装

Flutter側の実装は、パッケージの追加と、受け取り処理を記載しておきます。皆さんのアプリに合わせてカスタマイズして使ってください。ここではライブラリのサンプルベースで紹介します。

1.1 packageの追加

pubspec.yamlファイルに追加します。

receive_sharing_intent: 1.4.5

1.2 サンプルアプリのmain.dart

ライブラリのサンプルを見てみましょう。
ライフサイクルで言うと、initStateで、アプリを落とした状態（起動していない状態）、アプリがバックグラウンドにいる状態でシェア時にどう受け取るか記述していることがわかるでしょう。
自分のアプリに取り込む場合はその辺りを中心にカスタマイズしてご利用ください。

import 'package:flutter/material.dart';
import 'dart:async';

import 'package:receive_sharing_intent/receive_sharing_intent.dart';

void main() => runApp(MyApp());

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  late StreamSubscription _intentDataStreamSubscription;
  List<SharedMediaFile>? _sharedFiles;
  String? _sharedText;

  @override
  void initState() {
    super.initState();

    // For sharing images coming from outside the app while the app is in the memory
    _intentDataStreamSubscription = ReceiveSharingIntent.getMediaStream()
        .listen((List<SharedMediaFile> value) {
      setState(() {
        _sharedFiles = value;
        print("Shared:" + (_sharedFiles?.map((f) => f.path).join(",") ?? ""));
      });
    }, onError: (err) {
      print("getIntentDataStream error: $err");
    });

    // For sharing images coming from outside the app while the app is closed
    ReceiveSharingIntent.getInitialMedia().then((List<SharedMediaFile> value) {
      setState(() {
        _sharedFiles = value;
        print("Shared:" + (_sharedFiles?.map((f) => f.path).join(",") ?? ""));
      });
    });

    // For sharing or opening urls/text coming from outside the app while the app is in the memory
    _intentDataStreamSubscription =
        ReceiveSharingIntent.getTextStream().listen((String value) {
          setState(() {
            _sharedText = value;
            print("Shared: $_sharedText");
          });
        }, onError: (err) {
          print("getLinkStream error: $err");
        });

    // For sharing or opening urls/text coming from outside the app while the app is closed
    ReceiveSharingIntent.getInitialText().then((String? value) {
      setState(() {
        _sharedText = value;
        print("Shared: $_sharedText");
      });
    });
  }

  @override
  void dispose() {
    _intentDataStreamSubscription.cancel();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    const textStyleBold = const TextStyle(fontWeight: FontWeight.bold);
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('Plugin example app'),
        ),
        body: Center(
          child: Column(
            children: <Widget>[
              Text("Shared files:", style: textStyleBold),
              Text(_sharedFiles
                  ?.map((f) =>
              "{Path: ${f.path}, Type: ${f.type.toString().replaceFirst("SharedMediaType.", "")}}\n")
                  .join(",\n") ??
                  ""),
              SizedBox(height: 100),
              Text("Shared urls/text:", style: textStyleBold),
              Text(_sharedText ?? "")
            ],
          ),
        ),
      ),
    );
  }
}

2 iOSの設定

iOSの方が大変なのでまずはiOSから。Xcodeでの作業も多いです。

2.1 Info.plistに追加

まずはメインのアプリのInfo.plistにシェアの部分を追加しましょう。
<key>CFBundleURLTypes</key>以降ですね。

<?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>en</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>receive_sharing_intent_example</string>
	<key>CFBundlePackageType</key>
	<string>APPL</string>
	<key>CFBundleShortVersionString</key>
	<string>$(MARKETING_VERSION)</string>
	<key>CFBundleSignature</key>
	<string>????</string>
	<key>CFBundleURLTypes</key>
	<array>
		<dict>
			<key>CFBundleTypeRole</key>
			<string>Editor</string>
			<key>CFBundleURLName</key>
            		<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
			<key>CFBundleURLSchemes</key>
			<array>
				<string>ShareMedia-$(PRODUCT_BUNDLE_IDENTIFIER)</string>
			</array>
		</dict>
		<dict/>
	</array>
	<key>CFBundleVersion</key>
	<string>$(CURRENT_PROJECT_VERSION)</string>
	<key>LSRequiresIPhoneOS</key>
	<true/>
	<key>NSPhotoLibraryUsageDescription</key>
	<string>To upload photos, please allow permission to access your photo library.</string>
	<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>

2.2 XcodeからShare Extension追加

XcodeでFile/New/Target で Share Extension選択して作成
bundle idを親のアプリのbundleid　＋　.○○○のような形にすること。基本自動でそうなります。

2.3 追加した Share ExtensionアプリのInfo.plistにコード追加

ShareExtensionのInfo.plistにシェアの制限などを記述します。
<key>NSExtension</key>以降ですね。

<?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>$(DEVELOPMENT_LANGUAGE)</string>
	<key>CFBundleDisplayName</key>
	<string>Sharing Extension</string>
	<key>CFBundleExecutable</key>
	<string>$(EXECUTABLE_NAME)</string>
	<key>CFBundleIdentifier</key>
	<string>$(PRODUCT_BUNDLE_IDENTIFIER)</string>
	<key>CFBundleInfoDictionaryVersion</key>
	<string>6.0</string>
	<key>CFBundleName</key>
	<string>$(PRODUCT_NAME)</string>
	<key>CFBundlePackageType</key>
	<string>XPC!</string>
	<key>CFBundleShortVersionString</key>
	<string>$(MARKETING_VERSION)</string>
	<key>CFBundleVersion</key>
	<string>$(CURRENT_PROJECT_VERSION)</string>
	<key>NSExtension</key>
	<dict>
		<key>NSExtensionAttributes</key>
		<dict>
			<key>NSExtensionActivationRule</key>
			<dict>
				<key>NSExtensionActivationSupportsFileWithMaxCount</key>
				<integer>1</integer>
				<key>NSExtensionActivationSupportsImageWithMaxCount</key>
				<integer>100</integer>
				<key>NSExtensionActivationSupportsMovieWithMaxCount</key>
				<integer>100</integer>
				<key>NSExtensionActivationSupportsText</key>
				<true/>
				<key>NSExtensionActivationSupportsWebURLWithMaxCount</key>
				<integer>1</integer>
			</dict>
			<key>PHSupportedMediaTypes</key>
			<array>
				<string>Video</string>
				<string>Image</string>
			</array>
		</dict>
		<key>NSExtensionMainStoryboard</key>
		<string>MainInterface</string>
		<key>NSExtensionPointIdentifier</key>
		<string>com.apple.share-services</string>
	</dict>
</dict>
</plist>

2.4 Share　ExtensionアプリのViewControllerを修正

サンプルコピーしても構文エラー出るのでfix押して修正しています。

//
//  ShareViewController.swift
//  Sharing Extension
//
//  Created by Kasem Mohamed on 2019-05-30.
//  Copyright © 2019 The Chromium Authors. All rights reserved.
//
import UIKit
import Social
import MobileCoreServices
import Photos

class ShareViewController: SLComposeServiceViewController {
    // TODO: IMPORTANT: This should be your host app bundle identifier
    let hostAppBundleIdentifier = "com.kasem.sharing"
    let sharedKey = "ShareKey"
    var sharedMedia: [SharedMediaFile] = []
    var sharedText: [String] = []
    let imageContentType = kUTTypeImage as String
    let videoContentType = kUTTypeMovie as String
    let textContentType = kUTTypeText as String
    let urlContentType = kUTTypeURL as String
    let fileURLType = kUTTypeFileURL as String;
    
    override func isContentValid() -> Bool {
        return true
    }
    
    override func viewDidLoad() {
        super.viewDidLoad();
    }
    
    override func viewDidAppear(_ animated: Bool) {
        super.viewDidAppear(animated)

        // This is called after the user selects Post. Do the upload of contentText and/or NSExtensionContext attachments.
        if let content = extensionContext!.inputItems[0] as? NSExtensionItem {
            if let contents = content.attachments {
                for (index, attachment) in (contents as! [NSItemProvider]).enumerated() {
                    if attachment.hasItemConformingToTypeIdentifier(imageContentType) {
                        handleImages(content: content, attachment: attachment, index: index)
                    } else if attachment.hasItemConformingToTypeIdentifier(textContentType) {
                        handleText(content: content, attachment: attachment, index: index)
                    } else if attachment.hasItemConformingToTypeIdentifier(fileURLType) {
                        handleFiles(content: content, attachment: attachment, index: index)
                    } else if attachment.hasItemConformingToTypeIdentifier(urlContentType) {
                        handleUrl(content: content, attachment: attachment, index: index)
                    } else if attachment.hasItemConformingToTypeIdentifier(videoContentType) {
                        handleVideos(content: content, attachment: attachment, index: index)
                    }
                }
            }
        }
    }
    
    override func didSelectPost() {
        print("didSelectPost");
    }
    
    override func configurationItems() -> [Any]! {
        // To add configuration options via table cells at the bottom of the sheet, return an array of SLComposeSheetConfigurationItem here.
        return []
    }
    
    private func handleText (content: NSExtensionItem, attachment: NSItemProvider, index: Int) {
        attachment.loadItem(forTypeIdentifier: textContentType, options: nil) { [weak self] data, error in
            
            if error == nil, let item = data as? String, let this = self {
                
                this.sharedText.append(item)
                
                // If this is the last item, save imagesData in userDefaults and redirect to host app
                if index == (content.attachments?.count)! - 1 {
                    let userDefaults = UserDefaults(suiteName: "group.\(this.hostAppBundleIdentifier)")
                    userDefaults?.set(this.sharedText, forKey: this.sharedKey)
                    userDefaults?.synchronize()
                    this.redirectToHostApp(type: .text)
                }
                
            } else {
                self?.dismissWithError()
            }
        }
    }
    
    private func handleUrl (content: NSExtensionItem, attachment: NSItemProvider, index: Int) {
        attachment.loadItem(forTypeIdentifier: urlContentType, options: nil) { [weak self] data, error in
            
            if error == nil, let item = data as? URL, let this = self {
                
                this.sharedText.append(item.absoluteString)
                
                // If this is the last item, save imagesData in userDefaults and redirect to host app
                if index == (content.attachments?.count)! - 1 {
                    let userDefaults = UserDefaults(suiteName: "group.\(this.hostAppBundleIdentifier)")
                    userDefaults?.set(this.sharedText, forKey: this.sharedKey)
                    userDefaults?.synchronize()
                    this.redirectToHostApp(type: .text)
                }
                
            } else {
                self?.dismissWithError()
            }
        }
    }
    
    private func handleImages (content: NSExtensionItem, attachment: NSItemProvider, index: Int) {
        attachment.loadItem(forTypeIdentifier: imageContentType, options: nil) { [weak self] data, error in
            
            if error == nil, let url = data as? URL, let this = self {
                
                // Always copy
                let fileName = this.getFileName(from: url, type: .image)
                let newPath = FileManager.default
                    .containerURL(forSecurityApplicationGroupIdentifier: "group.\(this.hostAppBundleIdentifier)")!
                    .appendingPathComponent(fileName)
                let copied = this.copyFile(at: url, to: newPath)
                if(copied) {
                    this.sharedMedia.append(SharedMediaFile(path: newPath.absoluteString, thumbnail: nil, duration: nil, type: .image))
                }
                
                // If this is the last item, save imagesData in userDefaults and redirect to host app
                if index == (content.attachments?.count)! - 1 {
                    let userDefaults = UserDefaults(suiteName: "group.\(this.hostAppBundleIdentifier)")
                    userDefaults?.set(this.toData(data: this.sharedMedia), forKey: this.sharedKey)
                    userDefaults?.synchronize()
                    this.redirectToHostApp(type: .media)
                }
                
            } else {
                 self?.dismissWithError()
            }
        }
    }
    
    private func handleVideos (content: NSExtensionItem, attachment: NSItemProvider, index: Int) {
        attachment.loadItem(forTypeIdentifier: videoContentType, options: nil) { [weak self] data, error in
            
            if error == nil, let url = data as? URL, let this = self {
                
                // Always copy
                let fileName = this.getFileName(from: url, type: .video)
                let newPath = FileManager.default
                    .containerURL(forSecurityApplicationGroupIdentifier: "group.\(this.hostAppBundleIdentifier)")!
                    .appendingPathComponent(fileName)
                let copied = this.copyFile(at: url, to: newPath)
                if(copied) {
                    guard let sharedFile = this.getSharedMediaFile(forVideo: newPath) else {
                        return
                    }
                    this.sharedMedia.append(sharedFile)
                }
                
                // If this is the last item, save imagesData in userDefaults and redirect to host app
                if index == (content.attachments?.count)! - 1 {
                    let userDefaults = UserDefaults(suiteName: "group.\(this.hostAppBundleIdentifier)")
                    userDefaults?.set(this.toData(data: this.sharedMedia), forKey: this.sharedKey)
                    userDefaults?.synchronize()
                    this.redirectToHostApp(type: .media)
                }
                
            } else {
                 self?.dismissWithError()
            }
        }
    }
    
    private func handleFiles (content: NSExtensionItem, attachment: NSItemProvider, index: Int) {
        attachment.loadItem(forTypeIdentifier: fileURLType, options: nil) { [weak self] data, error in

            if error == nil, let url = data as? URL, let this = self {

                // Always copy
                let fileName = this.getFileName(from :url, type: .file)
                let newPath = FileManager.default
                    .containerURL(forSecurityApplicationGroupIdentifier: "group.\(this.hostAppBundleIdentifier)")!
                    .appendingPathComponent(fileName)
                let copied = this.copyFile(at: url, to: newPath)
                if (copied) {
                    this.sharedMedia.append(SharedMediaFile(path: newPath.absoluteString, thumbnail: nil, duration: nil, type: .file))
                }

                if index == (content.attachments?.count)! - 1 {
                    let userDefaults = UserDefaults(suiteName: "group.\(this.hostAppBundleIdentifier)")
                    userDefaults?.set(this.toData(data: this.sharedMedia), forKey: this.sharedKey)
                    userDefaults?.synchronize()
                    this.redirectToHostApp(type: .file)
                }

            } else {
                self?.dismissWithError()
            }
        }
    }
    
    private func dismissWithError() {
        print("[ERROR] Error loading data!")
        let alert = UIAlertController(title: "Error", message: "Error loading data", preferredStyle: .alert)

        let action = UIAlertAction(title: "Error", style: .cancel) { _ in
            self.dismiss(animated: true, completion: nil)
        }
        
        alert.addAction(action)
        present(alert, animated: true, completion: nil)
        extensionContext!.completeRequest(returningItems: [], completionHandler: nil)
    }
    
    private func redirectToHostApp(type: RedirectType) {
        let url = URL(string: "ShareMedia-\(hostAppBundleIdentifier)://dataUrl=\(sharedKey)#\(type)")
        var responder = self as UIResponder?
        let selectorOpenURL = sel_registerName("openURL:")
        
        while (responder != nil) {
            if (responder?.responds(to: selectorOpenURL))! {
                let _ = responder?.perform(selectorOpenURL, with: url)
            }
            responder = responder!.next
        }
        extensionContext!.completeRequest(returningItems: [], completionHandler: nil)
    }
    
    enum RedirectType {
        case media
        case text
        case file
    }
    
    func getExtension(from url: URL, type: SharedMediaType) -> String {
        let parts = url.lastPathComponent.components(separatedBy: ".")
        var ex: String? = nil
        if (parts.count > 1) {
            ex = parts.last
        }
        
        if (ex == nil) {
            switch type {
                case .image:
                    ex = "PNG"
                case .video:
                    ex = "MP4"
                case .file:
                    ex = "TXT"
            }
        }
        return ex ?? "Unknown"
    }
    
    func getFileName(from url: URL, type: SharedMediaType) -> String {
        var name = url.lastPathComponent
        
        if (name.isEmpty) {
            name = UUID().uuidString + "." + getExtension(from: url, type: type)
        }
        
        return name
    }
    
    func copyFile(at srcURL: URL, to dstURL: URL) -> Bool {
        do {
            if FileManager.default.fileExists(atPath: dstURL.path) {
                try FileManager.default.removeItem(at: dstURL)
            }
            try FileManager.default.copyItem(at: srcURL, to: dstURL)
        } catch (let error) {
            print("Cannot copy item at \(srcURL) to \(dstURL): \(error)") 
            return false
        }
        return true
    }
    
    private func getSharedMediaFile(forVideo: URL) -> SharedMediaFile? {
        let asset = AVAsset(url: forVideo)
        let duration = (CMTimeGetSeconds(asset.duration) * 1000).rounded()
        let thumbnailPath = getThumbnailPath(for: forVideo)
        
        if FileManager.default.fileExists(atPath: thumbnailPath.path) {
            return SharedMediaFile(path: forVideo.absoluteString, thumbnail: thumbnailPath.absoluteString, duration: duration, type: .video)
        }
        
        var saved = false
        let assetImgGenerate = AVAssetImageGenerator(asset: asset)
        assetImgGenerate.appliesPreferredTrackTransform = true
        //        let scale = UIScreen.main.scale
        assetImgGenerate.maximumSize =  CGSize(width: 360, height: 360)
        do {
            let img = try assetImgGenerate.copyCGImage(at: CMTimeMakeWithSeconds(1.0, 600), actualTime: nil)
            try UIImagePNGRepresentation(UIImage(cgImage: img))?.write(to: thumbnailPath)
            saved = true
        } catch {
            saved = false
        }
        
        return saved ? SharedMediaFile(path: forVideo.absoluteString, thumbnail: thumbnailPath.absoluteString, duration: duration, type: .video) : nil
        
    }
    
    private func getThumbnailPath(for url: URL) -> URL {
        let fileName = Data(url.lastPathComponent.utf8).base64EncodedString().replacingOccurrences(of: "==", with: "")
        let path = FileManager.default
            .containerURL(forSecurityApplicationGroupIdentifier: "group.\(hostAppBundleIdentifier)")!
            .appendingPathComponent("\(fileName).jpg")
        return path
    }
    
    class SharedMediaFile: Codable {
        var path: String; // can be image, video or url path. It can also be text content
        var thumbnail: String?; // video thumbnail
        var duration: Double?; // video duration in milliseconds
        var type: SharedMediaType;
        
        
        init(path: String, thumbnail: String?, duration: Double?, type: SharedMediaType) {
            self.path = path
            self.thumbnail = thumbnail
            self.duration = duration
            self.type = type
        }

        // Debug method to print out SharedMediaFile details in the console
        func toString() {
            print("[SharedMediaFile] \n\tpath: \(self.path)\n\tthumbnail: \(self.thumbnail)\n\tduration: \(self.duration)\n\ttype: \(self.type)")
        }
    }
    
    enum SharedMediaType: Int, Codable {
        case image
        case video
        case file
    }
    
    func toData(data: [SharedMediaFile]) -> Data {
        let encodedData = try? JSONEncoder().encode(data)
        return encodedData!
    }
}

extension Array {
    subscript (safe index: UInt) -> Element? {
        return Int(index) < count ? self[Int(index)] : nil
    }
}

サンプルのBundle Idだけ作ったアプリに変更すること。
let hostAppBundleIdentifier = "com.kasem.sharing"のところですね。
＊ShareExtensionアプリではなく、本アプリのBundle Idです。

2.5 本アプリとShare Extensionアプリを同じグループに入れる

Capabilities タブで＋を押して、App Groupsを作って入れましょう。 同じグループに入れないとダメです。グループ名は group.【YOUR_HOST_APP_BUNDLE_IDENTIFIER】 です。
ホストのアプリのBundle Idで作ってくださいね。

2.6 その他注意事項

buils settingsのbitcode はnoに設定

はユニバーサルリンク、App Clipsあたりを使うのであれば下記の設定が必要。
.entitlementsを下記に修正。

<?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>aps-environment</key>
    <string>development</string>
    <key>com.apple.developer.associated-domains</key>
    <array>
        <string>applinks:【アプリのURL】</string>
    </array>
	<key>com.apple.security.application-groups</key>
	<array>
		<string>【グループID】</string>
	</array>
</dict>
</plist>

3 Androidの設定

Androidの設定はシンプルです。

3.1 AndroidManifestに追記

通常のIntentの処理をAndroidManifest.xmlに追記するだけでした。
アプリにおける必要なところだけ追記すればいいかと。

<manifest xmlns:android="http://schemas.android.com/apk/res/android"
.....
 <uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>

  <application
        android:name="io.flutter.app.FlutterApplication"
        ...
        >

    <activity
            android:name=".MainActivity"
            android:launchMode="singleTop"
            android:theme="@style/LaunchTheme"
            android:configChanges="orientation|keyboardHidden|keyboard|screenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
            android:hardwareAccelerated="true"
            android:windowSoftInputMode="adjustResize">

            <intent-filter>
               <action android:name="android.intent.action.VIEW" />
               <category android:name="android.intent.category.DEFAULT" />
               <category android:name="android.intent.category.BROWSABLE" />
               <!--TODO:  Add this filter, if you want support opening urls into your app-->
               <data
                   android:scheme="https"
                   android:host="example.com"
                   android:pathPrefix="/invite"/>
            </intent-filter>

             <!--TODO: Add this filter, if you want to support sharing text into your app-->
            <intent-filter>
               <action android:name="android.intent.action.SEND" />
               <category android:name="android.intent.category.DEFAULT" />
               <data android:mimeType="text/*" />
            </intent-filter>

            <!--TODO: Add this filter, if you want to support sharing images into your app-->
            <intent-filter>
                <action android:name="android.intent.action.SEND" />
                <category android:name="android.intent.category.DEFAULT" />
                <data android:mimeType="image/*" />
            </intent-filter>

            <intent-filter>
                <action android:name="android.intent.action.SEND_MULTIPLE" />
                <category android:name="android.intent.category.DEFAULT" />
                <data android:mimeType="image/*" />
            </intent-filter>

             <!--TODO: Add this filter, if you want to support sharing videos into your app-->
            <intent-filter>
                <action android:name="android.intent.action.SEND" />
                <category android:name="android.intent.category.DEFAULT" />
                <data android:mimeType="video/*" />
            </intent-filter>
            <intent-filter>
                <action android:name="android.intent.action.SEND_MULTIPLE" />
                <category android:name="android.intent.category.DEFAULT" />
                <data android:mimeType="video/*" />
            </intent-filter>

            <!--TODO: Add this filter, if you want to support sharing any type of files-->
            <intent-filter>
                <action android:name="android.intent.action.SEND" />
                <category android:name="android.intent.category.DEFAULT" />
                <data android:mimeType="*/*" />
            </intent-filter>
            <intent-filter>
                <action android:name="android.intent.action.SEND_MULTIPLE" />
                <category android:name="android.intent.category.DEFAULT" />
                <data android:mimeType="*/*" />
            </intent-filter>
      </activity>

  </application>
</manifest>
....

参考

pub.dev
https://pub.dev/packages/receive_sharing_intent
github
https://github.com/KasemJaffer/receive_sharing_intent

感想

FlutterやっててたまにiOS周りの実装が必要になって困ることありますが、iOSを理解するいい機会だと思って接しています。今回は実は、フレーバーまわりでハマりましたがなんとか乗り越えました。その辺りの話もおいおいやっていければと。

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次回予告

毎回次回予告通りいかない内容になっていますが、次回はFirestore周りを整理して書こうかと思っています。