Flutter Video Call: A Comprehensive Guide to Building Real-time Apps

1dependencies:
2  flutter:
3    sdk: flutter
4  # Add your chosen video call SDK here
5  # For example:
6  agora_rtc_engine: ^6.0.0
7

1import 'package:flutter/material.dart';
2
3class VideoCallScreen extends StatefulWidget {
4  @override
5  _VideoCallScreenState createState() => _VideoCallScreenState();
6}
7
8class _VideoCallScreenState extends State<VideoCallScreen> {
9  @override
10  Widget build(BuildContext context) {
11    return Scaffold(
12      appBar: AppBar(title: Text('Flutter Video Call')),
13      body: Center(
14        child: Column(
15          mainAxisAlignment: MainAxisAlignment.center,
16          children: <Widget>[
17            // Local video preview
18            Container(
19              width: 200,
20              height: 200,
21              color: Colors.grey,
22              child: Center(child: Text('Local Video')), // Placeholder
23            ),
24            SizedBox(height: 20),
25            // Remote video preview
26            Container(
27              width: 200,
28              height: 200,
29              color: Colors.grey,
30              child: Center(child: Text('Remote Video')), // Placeholder
31            ),
32            SizedBox(height: 20),
33            // Call control buttons
34            Row(
35              mainAxisAlignment: MainAxisAlignment.spaceEvenly,
36              children: [
37                ElevatedButton(
38                  onPressed: () {},
39                  child: Text('Start Call'),
40                ),
41                ElevatedButton(
42                  onPressed: () {},
43                  child: Text('End Call'),
44                ),
45              ],
46            ),
47          ],
48        ),
49      ),
50    );
51  }
52}
53

1// Assume using a hypothetical SDK 'MyVideoCallSDK'
2import 'package:flutter/material.dart';
3
4class MyVideoCallSDK {
5  static Future<void> initialize() async {
6    // Initialize the SDK (replace with actual SDK initialization)
7    print('SDK initialized');
8  }
9
10  static Future<void> joinChannel(String channelName) async {
11    // Join the channel (replace with actual SDK call)
12    print('Joined channel: $channelName');
13  }
14
15  static Future<void> leaveChannel() async {
16    // Leave the channel (replace with actual SDK call)
17    print('Left channel');
18  }
19}
20
21class _VideoCallScreenState extends State<VideoCallScreen> {
22  bool _isCallInitialized = false;
23
24  @override
25  void initState() {
26    super.initState();
27    initializeCall();
28  }
29
30  Future<void> initializeCall() async {
31    await MyVideoCallSDK.initialize();
32    setState(() {
33      _isCallInitialized = true;
34    });
35  }
36
37  @override
38  Widget build(BuildContext context) {
39    return Scaffold(
40      appBar: AppBar(title: Text('Flutter Video Call')),
41      body: Center(
42        child: Column(
43          mainAxisAlignment: MainAxisAlignment.center,
44          children: <Widget>[
45            Container(
46              width: 200,
47              height: 200,
48              color: Colors.grey,
49              child: Center(child: Text('Local Video')), // Placeholder
50            ),
51            SizedBox(height: 20),
52            Container(
53              width: 200,
54              height: 200,
55              color: Colors.grey,
56              child: Center(child: Text('Remote Video')), // Placeholder
57            ),
58            SizedBox(height: 20),
59            Row(
60              mainAxisAlignment: MainAxisAlignment.spaceEvenly,
61              children: [
62                ElevatedButton(
63                  onPressed: _isCallInitialized ? () async {
64                    await MyVideoCallSDK.joinChannel('test_channel');
65                  } : null,
66                  child: Text('Start Call'),
67                ),
68                ElevatedButton(
69                  onPressed: () async {
70                    await MyVideoCallSDK.leaveChannel();
71                  },
72                  child: Text('End Call'),
73                ),
74              ],
75            ),
76          ],
77        ),
78      ),
79    );
80  }
81}
82

1import 'package:permission_handler/permission_handler.dart';
2
3Future<void> requestPermissions() async {
4  await [Permission.camera, Permission.microphone].request();
5}
6

1// Logic to handle multiple remote video streams
2// Example: Displaying video feeds in a grid layout
3

1// SDK-specific code for initiating and displaying screen sharing.
2