Flutter Callkit Incoming

A Flutter plugin to show incoming call in your Flutter app (Custom for Android/Callkit for iOS).

Sponsors

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⭐ Features

• Show an incoming call
• Start an outgoing call
• Custom UI Android/Callkit for iOS
• Example using Pushkit/VoIP for iOS

⚠️ iOS: ONLY WORKING ON REAL DEVICE

Please make sure setup/using PUSHKIT FOR VOIP

Note: Please do not use on simulator (Callkit framework not working on simulator)

🚀 Installation

1. Install Packages

For version >= v2.5.0, please make sure install and use Java SDK version >= 17 (Android)

Run this command:

flutter pub add flutter_callkit_incoming

Or add to pubspec.yaml:

dependencies:
  flutter_callkit_incoming: ^latest

2. Configure Project

Android

AndroidManifest.xml:

<manifest...>
    ...
    <!-- Using for load image from internet -->
    <uses-permission android:name="android.permission.INTERNET"/>

    <application ...>
        <activity ...
            android:name=".MainActivity"
            android:launchMode="singleInstance"><!-- add this -->
        ...
    </application>
</manifest>

Proguard Rules: The following rule needs to be added in the proguard-rules.pro to avoid obfuscated keys:

-keep class com.hiennv.flutter_callkit_incoming.** { *; }

iOS

Info.plist:

<key>UIBackgroundModes</key>
<array>
    <string>voip</string>
    <string>remote-notification</string>
    <string>processing</string> <!-- you can add this if needed -->
</array>

3. Usage

Import

import 'package:flutter_callkit_incoming/flutter_callkit_incoming.dart';

Show Incoming Call

this._currentUuid = _uuid.v4();
CallKitParams callKitParams = CallKitParams(
  id: _currentUuid,
  nameCaller: 'Hien Nguyen',
  appName: 'Callkit',
  avatar: 'https://i.pravatar.cc/100',
  handle: '0123456789',
  type: 0,
  textAccept: 'Accept',
  textDecline: 'Decline',
  missedCallNotification: NotificationParams(
    showNotification: true,
    isShowCallback: true,
    subtitle: 'Missed call',
    callbackText: 'Call back',
  ),
  callingNotification: const NotificationParams(
    showNotification: true,
    isShowCallback: true,
    subtitle: 'Calling...',
    callbackText: 'Hang Up',
  ),
  duration: 30000,
  extra: <String, dynamic>{'userId': '1a2b3c4d'},
  headers: <String, dynamic>{'apiKey': 'Abc@123!', 'platform': 'flutter'},
  android: const AndroidParams(
    isCustomNotification: true,
    isShowLogo: false,
    logoUrl: 'https://i.pravatar.cc/100',
    ringtonePath: 'system_ringtone_default',
    backgroundColor: '#0955fa',
    backgroundUrl: 'https://i.pravatar.cc/500',
    actionColor: '#4CAF50',
    textColor: '#ffffff',
    incomingCallNotificationChannelName: "Incoming Call",
    missedCallNotificationChannelName: "Missed Call",
    isShowCallID: false
  ),
  ios: IOSParams(
    iconName: 'CallKitLogo',
    handleType: 'generic',
    supportsVideo: true,
    maximumCallGroups: 2,
    maximumCallsPerCallGroup: 1,
    audioSessionMode: 'default',
    audioSessionActive: true,
    audioSessionPreferredSampleRate: 44100.0,
    audioSessionPreferredIOBufferDuration: 0.005,
    supportsDTMF: true,
    supportsHolding: true,
    supportsGrouping: false,
    supportsUngrouping: false,
    ringtonePath: 'system_ringtone_default',
  ),
);
await FlutterCallkitIncoming.showCallkitIncoming(callKitParams);

Note: For Firebase Message: @pragma('vm:entry-point')
https://github.com/firebase/flutterfire/blob/master/docs/cloud-messaging/receive.md#apple-platforms-and-android

Request Notification Permission (Android 13+/iOS)

For Android 13+, please requestNotificationPermission or requestPermission of firebase_messaging before showCallkitIncoming:

await FlutterCallkitIncoming.requestNotificationPermission({
  "title": "Notification permission",
  "rationaleMessagePermission": "Notification permission is required, to show notification.",
  "postNotificationMessageRequired": "Notification permission is required, Please allow notification permission from setting."
});

Request Full Intent Permission (Android 14+)

For Android 14+, please use canUseFullScreenIntent and requestFullIntentPermission:

// Check if can use full screen intent
await FlutterCallkitIncoming.canUseFullScreenIntent();

// Request full intent permission
await FlutterCallkitIncoming.requestFullIntentPermission();

Show Missed Call Notification

this._currentUuid = _uuid.v4();
CallKitParams params = CallKitParams(
  id: _currentUuid,
  nameCaller: 'Hien Nguyen',
  handle: '0123456789',
  type: 1,
  missedCallNotification: const NotificationParams(
    showNotification: true,
    isShowCallback: true,
    subtitle: 'Missed call',
    callbackText: 'Call back',
  ),
  android: const AndroidParams(
    isCustomNotification: true,
    isShowCallID: true,
  ),
  extra: <String, dynamic>{'userId': '1a2b3c4d'},
);
await FlutterCallkitIncoming.showMissCallNotification(params);

Hide Call Notification (Android)

CallKitParams params = CallKitParams(
  id: _currentUuid,
);
await FlutterCallkitIncoming.hideCallkitIncoming(params);

Start Outgoing Call

this._currentUuid = _uuid.v4();
CallKitParams params = CallKitParams(
  id: this._currentUuid,
  nameCaller: 'Hien Nguyen',
  handle: '0123456789',
  type: 1,
  extra: <String, dynamic>{'userId': '1a2b3c4d'},
  ios: IOSParams(handleType: 'generic'),
  callingNotification: const NotificationParams(
    showNotification: true,
    isShowCallback: true,
    subtitle: 'Calling...',
    callbackText: 'Hang Up',
  ),
  android: const AndroidParams(
    isCustomNotification: true,
    isShowCallID: true,
  )
);
await FlutterCallkitIncoming.startCall(params);

End Call

// End specific call
await FlutterCallkitIncoming.endCall(this._currentUuid);

// End all calls
await FlutterCallkitIncoming.endAllCalls();

Get Active Calls

iOS: returns active calls from Callkit (only id), Android: only returns last call

await FlutterCallkitIncoming.activeCalls();

Output:

[{"id": "8BAA2B26-47AD-42C1-9197-1D75F662DF78", ...}]

Set Call Connected

Used to determine Incoming Call or Outgoing Call status in phone book(reset/start timer):

await FlutterCallkitIncoming.setCallConnected(this._currentUuid);

Note: After the call is ACCEPT or startCall, please call this function. Normally it should be called when WebRTC/P2P is established.

Get Device Push Token VoIP

iOS: returns deviceToken, Android: returns none

await FlutterCallkitIncoming.getDevicePushTokenVoIP();

Output:

d6a77ca80c5f09f87f353cdd328ec8d7d34e92eb108d046c91906f27f54949cd

Important: Make sure using SwiftFlutterCallkitIncomingPlugin.sharedInstance?.setDevicePushTokenVoIP(deviceToken) inside AppDelegate.swift (Example)

func pushRegistry(_ registry: PKPushRegistry, didUpdate credentials: PKPushCredentials, for type: PKPushType) {
    print(credentials.token)
    let deviceToken = credentials.token.map { String(format: "%02x", $0) }.joined()
    // Save deviceToken to your server
    SwiftFlutterCallkitIncomingPlugin.sharedInstance?.setDevicePushTokenVoIP(deviceToken)
}

func pushRegistry(_ registry: PKPushRegistry, didInvalidatePushTokenFor type: PKPushType) {
    print("didInvalidatePushTokenFor")
    SwiftFlutterCallkitIncomingPlugin.sharedInstance?.setDevicePushTokenVoIP("")
}

Listen Events

FlutterCallkitIncoming.onEvent.listen((CallEvent event) {
  switch (event!.event) {
    case Event.actionCallIncoming:
      // TODO: received an incoming call
      break;
    case Event.actionCallStart:
      // TODO: started an outgoing call
      // TODO: show screen calling in Flutter
      break;
    case Event.actionCallAccept:
      // TODO: accepted an incoming call
      // TODO: show screen calling in Flutter
      break;
    case Event.actionCallDecline:
      // TODO: declined an incoming call
      break;
    case Event.actionCallEnded:
      // TODO: ended an incoming/outgoing call
      break;
    case Event.actionCallTimeout:
      // TODO: missed an incoming call
      break;
    case Event.actionCallCallback:
      // TODO: click action `Call back` from missed call notification
      break;
    case Event.actionCallToggleHold:
      // TODO: only iOS
      break;
    case Event.actionCallToggleMute:
      // TODO: only iOS
      break;
    case Event.actionCallToggleDmtf:
      // TODO: only iOS
      break;
    case Event.actionCallToggleGroup:
      // TODO: only iOS
      break;
    case Event.actionCallToggleAudioSession:
      // TODO: only iOS
      break;
    case Event.actionDidUpdateDevicePushTokenVoip:
      // TODO: only iOS
      break;
    case Event.actionCallCustom:
      // TODO: for custom action
      break;
  }
});

Call from Native (iOS/Android)

Swift (iOS):

var info = [String: Any?]()
info["id"] = "44d915e1-5ff4-4bed-bf13-c423048ec97a"
info["nameCaller"] = "Hien Nguyen"
info["handle"] = "0123456789"
info["type"] = 1
// ... set more data
SwiftFlutterCallkitIncomingPlugin.sharedInstance?.showCallkitIncoming(flutter_callkit_incoming.Data(args: info), fromPushKit: true)

// Please make sure call `completion()` at the end of the pushRegistry(......, completion: @escaping () -> Void)
// or `DispatchQueue.main.asyncAfter(deadline: .now() + 1.5) { completion() }`
// if you don't call completion() in pushRegistry(......, completion: @escaping () -> Void), there may be app crash by system when receiving VoIP

Kotlin (Android):

FlutterCallkitIncomingPlugin.getInstance().showIncomingNotification(...)

Alternative Swift approach:

let data = flutter_callkit_incoming.Data(id: "44d915e1-5ff4-4bed-bf13-c423048ec97a", nameCaller: "Hien Nguyen", handle: "0123456789", type: 0)
data.nameCaller = "Johnny"
data.extra = ["user": "abc@123", "platform": "ios"]
// ... set more data
SwiftFlutterCallkitIncomingPlugin.sharedInstance?.showCallkitIncoming(data, fromPushKit: true)

Objective-C:

#if __has_include(<flutter_callkit_incoming/flutter_callkit_incoming-Swift.h>)
#import <flutter_callkit_incoming/flutter_callkit_incoming-Swift.h>
#else
#import "flutter_callkit_incoming-Swift.h"
#endif

Data * data = [[Data alloc]initWithId:@"44d915e1-5ff4-4bed-bf13-c423048ec97a" nameCaller:@"Hien Nguyen" handle:@"0123456789" type:1];
[data setNameCaller:@"Johnny"];
[data setExtra:@{ @"userId" : @"HelloXXXX", @"key2" : @"value2"}];
// ... set more data
[SwiftFlutterCallkitIncomingPlugin.sharedInstance showCallkitIncoming:data fromPushKit:YES];

Send Custom Event from Native:

Swift:

SwiftFlutterCallkitIncomingPlugin.sharedInstance?.sendEventCustom(body: ["customKey": "customValue"])

Kotlin:

FlutterCallkitIncomingPlugin.getInstance().sendEventCustom(body: Map<String, Any>)

Call API when Accept/Decline/End/Timeout

Setup for Missed call notification(iOS)

AppDelegate.swift:

@UIApplicationMain
@objc class AppDelegate: FlutterAppDelegate, PKPushRegistryDelegate, CallkitIncomingAppDelegate {
    
    override func application(
        _ application: UIApplication,
        didFinishLaunchingWithOptions launchOptions: [UIApplication.LaunchOptionsKey: Any]?
    ) -> Bool {
        GeneratedPluginRegistrant.register(with: self)
        
        // Setup VOIP
        let mainQueue = DispatchQueue.main
        let voipRegistry: PKPushRegistry = PKPushRegistry(queue: mainQueue)
        voipRegistry.delegate = self
        voipRegistry.desiredPushTypes = [PKPushType.voIP]

        // Use if using WebRTC
        // RTCAudioSession.sharedInstance().useManualAudio = true
        // RTCAudioSession.sharedInstance().isAudioEnabled = false

        //Add for Missed call notification
        if #available(iOS 10.0, *) {
          UNUserNotificationCenter.current().delegate = self as UNUserNotificationCenterDelegate
        }
        
        return super.application(application, didFinishLaunchingWithOptions: launchOptions)
    }

    // Add for Missed call notification(show notification when foreground)
    override func userNotificationCenter(_ center: UNUserNotificationCenter,
                                willPresent notification: UNNotification,
                                withCompletionHandler completionHandler:
                                   @escaping (UNNotificationPresentationOptions) -> Void) {
        
        CallkitNotificationManager.shared.userNotificationCenter(center, willPresent: notification, withCompletionHandler: completionHandler)
    }
    
    // Add for Missed call notification(action when click callback in missed notification)
    override func userNotificationCenter(_ center: UNUserNotificationCenter,
                                         didReceive response: UNNotificationResponse,
                                         withCompletionHandler completionHandler: @escaping () -> Void) {
        if response.actionIdentifier == CallkitNotificationManager.CALLBACK_ACTION {
            let data = response.notification.request.content.userInfo as? [String: Any]
            SwiftFlutterCallkitIncomingPlugin.sharedInstance?.sendCallbackEvent(data)
        }
        completionHandler()
    }

    // Func Call API for Accept
    func onAccept(_ call: Call, _ action: CXAnswerCallAction) {
        let json = ["action": "ACCEPT", "data": call.data.toJSON()] as [String: Any]
        print("LOG: onAccept")
        self.performRequest(parameters: json) { result in
            switch result {
            case .success(let data):
                print("Received data: \(data)")
                // Make sure call action.fulfill() when you are done (connected WebRTC - Start counting seconds)
                action.fulfill()
            case .failure(let error):
                print("Error: \(error.localizedDescription)")
            }
        }
    }
    
    // Func Call API for Decline
    func onDecline(_ call: Call, _ action: CXEndCallAction) {
        let json = ["action": "DECLINE", "data": call.data.toJSON()] as [String: Any]
        print("LOG: onDecline")
        self.performRequest(parameters: json) { result in
            switch result {
            case .success(let data):
                print("Received data: \(data)")
                // Make sure call action.fulfill() when you are done
                action.fulfill()
            case .failure(let error):
                print("Error: \(error.localizedDescription)")
            }
        }
    }
    
    // Func Call API for End
    func onEnd(_ call: Call, _ action: CXEndCallAction) {
        let json = ["action": "END", "data": call.data.toJSON()] as [String: Any]
        print("LOG: onEnd")
        self.performRequest(parameters: json) { result in
            switch result {
            case .success(let data):
                print("Received data: \(data)")
                // Make sure call action.fulfill() when you are done
                action.fulfill()
            case .failure(let error):
                print("Error: \(error.localizedDescription)")
            }
        }
    }
    
    func onTimeOut(_ call: Call) {
        let json = ["action": "TIMEOUT", "data": call.data.toJSON()] as [String: Any]
        print("LOG: onTimeOut")
        self.performRequest(parameters: json) { result in
            switch result {
            case .success(let data):
                print("Received data: \(data)")
            case .failure(let error):
                print("Error: \(error.localizedDescription)")
            }
        }
    }

    func didActivateAudioSession(_ audioSession: AVAudioSession) {
        // Use if using WebRTC
        // RTCAudioSession.sharedInstance().audioSessionDidActivate(audioSession)
        // RTCAudioSession.sharedInstance().isAudioEnabled = true
    }
    
    func didDeactivateAudioSession(_ audioSession: AVAudioSession) {
        // Use if using WebRTC
        // RTCAudioSession.sharedInstance().audioSessionDidDeactivate(audioSession)
        // RTCAudioSession.sharedInstance().isAudioEnabled = false
    }
}

Please check full example: Example

MainActivity.kt:

class MainActivity: FlutterActivity(){

    private var callkitEventCallback = object: CallkitEventCallback{
        override fun onCallEvent(event: CallkitEventCallback.CallEvent, callData: Bundle) {
            when (event) {
                CallkitEventCallback.CallEvent.ACCEPT -> {
                    // Do something with answer
                }
                CallkitEventCallback.CallEvent.DECLINE -> {
                    // Do something with decline
                }
            }
        }
    }

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        FlutterCallkitIncomingPlugin.registerEventCallback(callkitEventCallback)
    }

    override fun onDestroy() {
        FlutterCallkitIncomingPlugin.unregisterEventCallback(callkitEventCallback)
        super.onDestroy()
    }


}

Please check full example: Example

📋 Properties

Main Properties

Missed Call Notification

Calling Notification

Android

iOS

📁 Source Code

Please checkout repo GitHub:

• https://github.com/hiennguyen92/flutter_callkit_incoming
• Example

📱 Pushkit - Received VoIP and Wake App from Terminated State (iOS Only)

Please check PUSHKIT.md for setup Pushkit for iOS.

📋 Todo

• Run background
• Simplify the setup process
• Custom notification for iOS (Missing notification)
• Keep notification when calling

🎯 Demo

Demo Illustration

Images

iOS (Lockscreen)	iOS (Full Screen)	iOS (Alert)
Android (Lockscreen) - Audio	Android (Alert) - Audio	Android (Lockscreen) - Video
Android (Alert) - Video	isCustomNotification: false