omni_chat #

OmniChat is a professional, feature-rich Flutter chat UI package. It supports 17+ message types, built-in media viewers, audio waveform recording, swipe-to-reply, emoji reactions, profile card messages, screenshot protection, full theme customisation, and built-in localisation via OmniChatStrings.

Designed for FlutterFlow integration and any Flutter app.

✨ Features #

📦 Installation #

dependencies:
  omni_chat: ^1.0.3

flutter pub get

Android permissions (AndroidManifest.xml) #

<uses-permission android:name="android.permission.CAMERA" />
<uses-permission android:name="android.permission.READ_MEDIA_IMAGES" />
<uses-permission android:name="android.permission.READ_MEDIA_VIDEO" />
<uses-permission android:name="android.permission.RECORD_AUDIO" />
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.INTERNET" />

iOS (Info.plist) #

<key>NSCameraUsageDescription</key>
<string>Required to capture photos and videos for chat</string>
<key>NSMicrophoneUsageDescription</key>
<string>Required to record voice messages</string>
<key>NSPhotoLibraryUsageDescription</key>
<string>Required to pick photos and videos from your library</string>

🚀 Quick Start #

import 'package:omni_chat/omni_chat.dart';

OmniChatThemeScope(
  theme: OmniChatTheme.dark(),
  child: Column(
    children: [
      Expanded(
        child: OmniChatList(
          messages: _messages,       // List<ChatMessage>
          currentUserId: 'user_me',
          isEncrypted: true,
          screenshotProtection: true,
          onReply: (msg) => setState(() => _replyTo = msg),
          onProfileTap: (uid) => Navigator.pushNamed(context, '/profile/$uid'),
          onPollVote: (msg, optionId) { /* update your backend */ },
        ),
      ),
      OmniChatInput(
        replyMessage: _replyTo,
        onCancelReply: () => setState(() => _replyTo = null),
        onSendText: (text) => _sendMessage(TextMessage(...)),
        onSendAudio: (path, duration, waveform) => _sendMessage(AudioMessage(...)),
        onAttachment: (type) => _handleAttachment(type),
      ),
    ],
  ),
);

📨 Message Types #

All message types extend ChatMessage. Use ChatMessage.fromJson() and toJson() for serialisation.

Text #

TextMessage(
  id: 'msg_1',
  senderId: 'user_a',
  timestamp: DateTime.now(),
  text: 'Hello @john! Check https://flutter.cn',
)

Image with source badge #

ImageMessage(
  id: 'msg_2',
  senderId: 'user_b',
  timestamp: DateTime.now(),
  imageUrl: 'https://example.com/photo.jpg',
  caption: 'Look at this!',
  source: MediaSource.camera, // shows 📷 Camera badge
)

Audio (waveform) #

AudioMessage(
  id: 'msg_3',
  senderId: 'user_a',
  timestamp: DateTime.now(),
  audioUrl: 'https://example.com/voice.m4a',
  duration: 45, // seconds
  waveformData: [0.2, 0.8, 0.5, 0.9, ...], // normalised amplitudes 0.0–1.0
  source: MediaSource.microphone,
)

Profile Card #

ProfileCardMessage(
  id: 'msg_4',
  senderId: 'user_a',    // sender
  userId: 'user_a',      // profile being shared (same → shows verified badge)
  username: 'odama_studio',
  displayName: 'Odama Studio',
  avatarUrl: 'https://example.com/avatar.jpg',
  isVerified: true,
  bio: 'Professional UI/UX design studio',
  timestamp: DateTime.now(),
)

View-Once Image #

EphemeralImageMessage(
  id: 'msg_5',
  senderId: 'user_b',
  timestamp: DateTime.now(),
  imageUrl: 'https://example.com/secret.jpg',
  hasBeenViewed: false,
)

Custom Message #

CustomMessage(
  id: 'msg_6',
  senderId: 'user_a',
  timestamp: DateTime.now(),
  customType: 'payment',
  payload: {'amount': 25.0, 'currency': 'USD'},
)

// In OmniChatList:
OmniChatList(
  messages: _messages,
  currentUserId: 'me',
  customMessageBuilder: (context, msg) {
    if (msg.customType == 'payment') {
      return PaymentBubble(payload: msg.payload);
    }
    return const SizedBox.shrink();
  },
)

🎨 Theming #

// Built-in presets
OmniChatTheme.light()
OmniChatTheme.dark()

// Custom theme
OmniChatTheme.light().copyWith(
  outgoingBubbleColor: Color(0xFF4CAF50),
  bubbleRadius: 20,
  waveformActiveColor: Colors.teal,
  wallpaper: OmniChatWallpaper.gradient(
    LinearGradient(
      colors: [Color(0xFFE0F2F1), Color(0xFFB2DFDB)],
      begin: Alignment.topLeft,
      end: Alignment.bottomRight,
    ),
  ),
)

Wrap your widget tree with OmniChatThemeScope:

OmniChatThemeScope(
  theme: myTheme,
  child: OmniChatList(...),
)

🔒 Security #

OmniChatList(
  messages: _messages,
  currentUserId: 'me',
  isEncrypted: true,          // shows 🔒 banner
  screenshotProtection: true, // Android FLAG_SECURE
)

Note: iOS does not support complete screenshot prevention via Flutter. The encryption banner is shown but screenshots can still be taken. For sensitive apps, consider additional platform-channel implementations.

📱 FlutterFlow Custom Widget Integration #

1. In FlutterFlow, go to Custom Code → Custom Widgets → Add Widget
2. Name it OmniChatWidget
3. Paste the following skeleton and adjust parameters as needed:

import 'package:omni_chat/omni_chat.dart';

class OmniChatWidget extends StatefulWidget {
  const OmniChatWidget({
    Key? key,
    required this.messages,       // List<dynamic> (JSON maps)
    required this.currentUserId,  // String
    this.isEncrypted = false,
    this.onSendText,              // Action
    this.onProfileTap,            // Action with userId param
  }) : super(key: key);

  final List<dynamic> messages;
  final String currentUserId;
  final bool isEncrypted;
  final Future<void> Function()? onSendText;
  final Future<void> Function()? onProfileTap;

  @override
  State<OmniChatWidget> createState() => _OmniChatWidgetState();
}

class _OmniChatWidgetState extends State<OmniChatWidget> {
  late List<ChatMessage> _parsed;

  @override
  void initState() {
    super.initState();
    _parsed = widget.messages
        .map((e) => ChatMessage.fromJson(Map<String, dynamic>.from(e as Map)))
        .toList();
  }

  @override
  Widget build(BuildContext context) {
    return OmniChatThemeScope(
      theme: OmniChatTheme.light(),
      child: Column(
        children: [
          Expanded(
            child: OmniChatList(
              messages: _parsed,
              currentUserId: widget.currentUserId,
              isEncrypted: widget.isEncrypted,
            ),
          ),
          OmniChatInput(
            onSendText: (_) => widget.onSendText?.call(),
          ),
        ],
      ),
    );
  }
}

4. Add omni_chat to your FlutterFlow project's pubspec.yaml under Project Settings → Custom Code → pubspec.yaml.

🤝 Contributing #

Pull requests are welcome! Please open an issue first to discuss changes.

📄 License #

MIT © 2024 OmniChat Contributors