open_with_app #

A Flutter plugin that enables your app to handle "Open With" intents from the system file manager or other apps. It supports custom file extensions and allows you to read the content of the file that opened your app.

Usage #

final _openWithAppPlugin = OpenWithApp();

// Check if app was opened with a file
String? initialFile = await _openWithAppPlugin.getInitialFile();

// Listen for new files opened while app is running
_openWithAppPlugin.getFileStream().listen((filePath) {
  print("New file: $filePath");
});

Setup #

Android #

Update your android/app/src/main/AndroidManifest.xml to include an intent filter for your custom file extension (e.g., .owa).

<activity ...>
    ...
    <!-- 
       Intent filter for opening files directly (e.g. from File Explorer).
       Required for handling "Open View" intents.
    -->
    <intent-filter>
        <action android:name="android.intent.action.VIEW" />
        <category android:name="android.intent.category.DEFAULT" />
        <category android:name="android.intent.category.BROWSABLE" />
        <data android:scheme="file" />
        <data android:scheme="content" />
        <data android:mimeType="*/*" />
        <data android:host="*" />
        <data android:pathPattern=".*\\.owa" /> <!-- Change .owa to your extension -->
    </intent-filter>

    <!-- 
       Intent filter for sharing files (e.g. "Share" from another app).
       Optional: Add this if you want your app to appear in the "Share" sheet.
    -->
     <intent-filter>
        <action android:name="android.intent.action.SEND" />
        <category android:name="android.intent.category.DEFAULT" />
        <data android:mimeType="*/*" />
    </intent-filter>
</activity>

iOS #

Update your ios/Runner/Info.plist to register the document type.

<dict>
    ...
    <!-- Add the following keys to your Info.plist -->
    <key>LSSupportsOpeningDocumentsInPlace</key>
    <true/>
    <key>UIFileSharingEnabled</key>
    <true/>
    <key>CFBundleDocumentTypes</key>
    <array>
        <dict>
            <key>CFBundleTypeName</key>
            <string>OWA File</string> <!-- Change to your file type name -->
            <key>CFBundleTypeRole</key>
            <string>Editor</string>
            <key>LSHandlerRank</key>
            <string>Owner</string>
            <key>LSItemContentTypes</key>
            <array>
                <string>dev.wiefel.owa</string> <!-- Change to your identifier -->
            </array>
        </dict>
    </array>
    <key>UTExportedTypeDeclarations</key>
    <array>
        <dict>
            <key>UTTypeConformsTo</key>
            <array>
                <string>public.data</string>
            </array>
            <key>UTTypeDescription</key>
            <string>OWA File</string> <!-- Change to your file description -->
            <key>UTTypeIdentifier</key>
            <string>dev.wiefel.owa</string> <!-- Change to your identifier -->
            <key>UTTypeTagSpecification</key>
            <dict>
                <key>public.filename-extension</key>
                <array>
                    <string>owa</string> <!-- Change to your extension -->
                </array>
            </dict>
        </dict>
    </array>
</dict>