CallBundle

Native incoming & outgoing call UI for Flutter. Provides CallKit on iOS and TelecomManager + OEM-adaptive notifications on Android.

Installation
Platform Setup
Basic Usage
API Reference
Permissions
FCM Integration
iOS VoIP Push (PushKit)
Cold-Start Handling
Event Handling
Configuration Options
Background Reject (Killed State)
Advanced Usage

Installation

dependencies:
  callbundle: ^1.0.0

The Android (callbundle_android) and iOS (callbundle_ios) packages are endorsed — they are automatically included. No additional dependency lines needed.

Platform Setup

Android

No additional setup needed. The plugin ships:

AndroidManifest.xml with all required permissions (auto-merged)
Consumer ProGuard rules (no app-level rules needed)
ConnectionService and BroadcastReceiver registration

Permissions shipped by the plugin:

FOREGROUND_SERVICE
FOREGROUND_SERVICE_PHONE_CALL
USE_FULL_SCREEN_INTENT
MANAGE_OWN_CALLS
WAKE_LOCK
VIBRATE
POST_NOTIFICATIONS
READ_PHONE_STATE
READ_PHONE_NUMBERS
SYSTEM_ALERT_WINDOW
REQUEST_IGNORE_BATTERY_OPTIMIZATIONS

iOS

Add the VoIP background mode to your Info.plist:

<key>UIBackgroundModes</key>
<array>
    <string>voip</string>
</array>

The plugin handles PushKit registration internally — no AppDelegate code needed.

For complete iOS setup including VoIP certificate configuration, see the callbundle_ios README.

Basic Usage

import 'package:callbundle/callbundle.dart';

void main() async {
  WidgetsFlutterBinding.ensureInitialized();

  // 1. Listen for call events BEFORE configure
  CallBundle.onEvent.listen(_handleCallEvent);

  // 2. Configure the plugin
  await CallBundle.configure(const NativeCallConfig(
    appName: 'MyApp',
    android: AndroidCallConfig(
      phoneAccountLabel: 'MyApp Calls',
      notificationChannelName: 'Incoming Calls',
    ),
    ios: IosCallConfig(
      supportsVideo: false,
      maximumCallGroups: 1,
      maximumCallsPerCallGroup: 1,
      includesCallsInRecents: true,
    ),
  ));

  // 3. Check and request permissions
  await _handlePermissions();

  runApp(const MyApp());
}

void _handleCallEvent(NativeCallEvent event) {
  switch (event.type) {
    case NativeCallEventType.accepted:
      // User tapped Accept — connect VoIP
      connectToRoom(event.callId, event.extra);
      break;
    case NativeCallEventType.declined:
      // User tapped Decline
      notifyServerCallDeclined(event.callId);
      break;
    case NativeCallEventType.ended:
      if (event.isUserInitiated) {
        // User ended from native UI
        disconnectFromRoom(event.callId);
      }
      // else: programmatic end from your code, already handled
      break;
    default:
      break;
  }
}

API Reference

CallBundle (Static API)

Method	Returns	Description
`configure(NativeCallConfig)`	`Future<void>`	Initialize plugin. Call once at startup.
`showIncomingCall(NativeCallParams)`	`Future<void>`	Show native incoming call UI.
`showOutgoingCall(NativeCallParams)`	`Future<void>`	Show native outgoing call UI.
`endCall(String callId)`	`Future<void>`	End a specific call.
`endAllCalls()`	`Future<void>`	End all active calls.
`setCallConnected(String callId)`	`Future<void>`	Mark call as connected/active.
`getActiveCalls()`	`Future<List<NativeCallInfo>>`	Get all active calls.
`checkPermissions()`	`Future<NativeCallPermissions>`	Check status without prompting.
`requestPermissions()`	`Future<NativeCallPermissions>`	Request permissions (triggers system dialogs).
`requestBatteryOptimizationExemption()`	`Future<bool>`	Request Doze mode exemption (Android).
`getVoipToken()`	`Future<String?>`	Get iOS VoIP push token.
`onEvent`	`Stream<NativeCallEvent>`	All native call events.
`onReady`	`Future<void>`	Completes when native side is ready.
`dispose()`	`Future<void>`	Release all resources.

NativeCallConfig

NativeCallConfig(
  appName: 'MyApp',                          // Required
  backgroundReject: BackgroundRejectConfig(   // Optional killed-state reject
    urlPattern: 'https://api.example.com/v1/api/calls/{callId}/reject',
    authStorageKey: 'access_token',
  ),
  android: const AndroidCallConfig(
    phoneAccountLabel: 'MyApp Calls',        // TelecomManager label
    notificationChannelName: 'Calls',        // Notification channel name
    oemAdaptiveMode: true,                   // Budget OEM detection
  ),
  ios: IosCallConfig(
    supportsVideo: false,                    // Video call support
    maximumCallGroups: 1,                    // Max concurrent call groups
    maximumCallsPerCallGroup: 1,             // Max calls per group
    includesCallsInRecents: true,            // Show in Phone app Recents
    iconTemplateImageName: null,             // Custom CallKit icon
    ringtoneSound: null,                     // Custom ringtone filename
  ),
)

NativeCallParams

NativeCallParams(
  callId: 'unique-id',                       // Required — unique identifier
  callerName: 'John Doe',                    // Required — displayed to user
  handle: '+1234567890',                     // Phone number or identifier
  callType: NativeCallType.voice,            // voice or video
  duration: 60000,                           // Auto-dismiss timeout (ms)
  callerAvatar: 'https://...',               // Avatar URL (Android only)
  extra: {'roomId': 'abc'},                  // Pass-through metadata
  android: const AndroidCallParams(),        // Android-specific options
  ios: const IosCallParams(                  // iOS-specific options
    handleType: NativeHandleType.phone,
  ),
)

NativeCallEvent

Property	Type	Description
`type`	`NativeCallEventType`	`accepted`, `declined`, `ended`, `incoming`, `missed`, `timedOut`
`callId`	`String`	The call identifier
`isUserInitiated`	`bool`	`true` if user tapped the native UI button
`extra`	`Map<String, dynamic>`	Pass-through metadata from `NativeCallParams.extra`
`eventId`	`int`	Monotonic ID for deduplication
`timestamp`	`DateTime`	When the event occurred

NativeCallPermissions

Property	Type	Description
`notificationPermission`	`PermissionStatus`	Notification permission status
`fullScreenIntentPermission`	`PermissionStatus`	Full-screen intent (Android 14+)
`phoneAccountEnabled`	`bool`	TelecomManager account registered
`batteryOptimizationExempt`	`bool`	Exempt from battery optimization
`oemAutoStartEnabled`	`bool`	OEM auto-start enabled
`manufacturer`	`String`	Device manufacturer
`model`	`String`	Device model
`osVersion`	`String`	OS version string
`diagnosticInfo`	`Map?`	OEM detection diagnostics
`isFullyReady`	`bool`	All critical permissions granted

Permissions

CallBundle provides a Dart-driven permission flow — check silently, show your own UI, then request:

Future<void> _handlePermissions() async {
  // 1. Check current status (no prompts)
  final status = await CallBundle.checkPermissions();

  if (status.notificationPermission != PermissionStatus.granted) {
    // 2. Show YOUR custom explanation dialog
    final agreed = await showDialog<bool>(
      context: context,
      builder: (ctx) => AlertDialog(
        title: const Text('Enable Notifications'),
        content: const Text(
          'We need notification permission to show incoming call '
          'alerts. Without this, you may miss important calls.',
        ),
        actions: [
          TextButton(
            onPressed: () => Navigator.pop(ctx, false),
            child: const Text('Not Now'),
          ),
          FilledButton(
            onPressed: () => Navigator.pop(ctx, true),
            child: const Text('Allow'),
          ),
        ],
      ),
    );

    // 3. Request only if user agreed
    if (agreed == true) {
      final result = await CallBundle.requestPermissions();
      print('After request: ${result.notificationPermission.name}');
    }
  }
}

What `requestPermissions()` does per platform

Platform	Action
Android 13+	System dialog for `POST_NOTIFICATIONS`
Android 14+	Opens Settings for `USE_FULL_SCREEN_INTENT`
Android < 13	No dialog needed (auto-granted)
iOS	`UNUserNotificationCenter.requestAuthorization()`

Battery Optimization Exemption

Battery optimization (Doze mode) on Android can prevent incoming calls from being delivered reliably:

final perms = await CallBundle.checkPermissions();
if (!perms.batteryOptimizationExempt) {
  final shouldRequest = await showBatteryExplanationDialog();
  if (shouldRequest) {
    final exempt = await CallBundle.requestBatteryOptimizationExemption();
    if (!exempt) {
      // System dialog shown — re-check after user returns
      final newPerms = await CallBundle.checkPermissions();
      print('Exempt: ${newPerms.batteryOptimizationExempt}');
    }
  }
}

Platform	`checkPermissions()`	`requestBatteryOptimizationExemption()`
Android 23+	`PowerManager.isIgnoringBatteryOptimizations()`	Opens `ACTION_REQUEST_IGNORE_BATTERY_OPTIMIZATIONS`
Android < 23	Returns `true`	Returns `true`
iOS	Returns `true`	Returns `true` (not applicable)

FCM Integration

CallBundle handles the native call UI — your app handles push delivery:

@pragma('vm:entry-point')
Future<void> firebaseMessagingBackgroundHandler(RemoteMessage message) async {
  WidgetsFlutterBinding.ensureInitialized();

  await CallBundle.configure(const NativeCallConfig(
    appName: 'MyApp',
    android: AndroidCallConfig(phoneAccountLabel: 'MyApp Calls'),
    ios: IosCallConfig(),
  ));

  await CallBundle.showIncomingCall(NativeCallParams(
    callId: message.data['callId'] ?? '',
    callerName: message.data['callerName'] ?? 'Unknown',
    handle: message.data['handle'] ?? '',
    callType: NativeCallType.voice,
    extra: message.data,
    android: const AndroidCallParams(),
    ios: const IosCallParams(),
  ));
}

iOS VoIP Push (PushKit)

On iOS, use VoIP pushes for the most reliable incoming call experience. The plugin handles PushKit internally and reports the incoming call to CallKit synchronously (required by iOS).

// Get the VoIP token to register with your server
final token = await CallBundle.getVoipToken();
if (token != null) {
  await registerTokenWithServer(token);
}

For setting up VoIP push certificates (PEM file creation, APNs configuration), see the callbundle_ios README — VoIP Certificate Setup.

Cold-Start Handling

When the app is killed and a user taps Accept on a notification:

Android Flow

1. User taps Accept on notification
2. CallActionReceiver.onReceive() fires
3. If plugin alive → event delivered immediately via onEvent
4. If plugin null → PendingCallStore.savePendingAccept()
5. App restarts → configure() → deliverPendingEvents() → event delivered

iOS Flow

1. VoIP push arrives → PushKit wakes app
2. reportNewIncomingCall() called synchronously
3. User taps Accept → CallKit delegate fires
4. If Dart ready → event sent immediately
5. If Dart not ready → CallStore.savePendingAccept()
6. Dart calls configure() → deliverPendingEvents() → event delivered

No hardcoded delays. Events are delivered as soon as configure() completes.

// Always listen BEFORE configure to catch cold-start events
CallBundle.onEvent.listen((event) {
  if (event.type == NativeCallEventType.accepted) {
    connectToVoipRoom(event.callId, event.extra);
  }
});

await CallBundle.configure(config); // Pending events delivered here

Event Handling

The `isUserInitiated` Pattern

Every event includes isUserInitiated to distinguish user actions from programmatic actions:

CallBundle.onEvent.listen((event) {
  if (event.type == NativeCallEventType.ended) {
    if (event.isUserInitiated) {
      // User tapped "End Call" on native UI
      disconnectRoom(event.callId);
      notifyServer(event.callId, 'ended_by_user');
    } else {
      // Your code called CallBundle.endCall()
      // No action needed — avoid double-disconnect
    }
  }
});

This eliminates the _isEndingCallKitProgrammatically flag pattern.

Complete event handler

CallBundle.onEvent.listen((event) {
  switch (event.type) {
    case NativeCallEventType.incoming:
      prepareVoipConnection(event.callId);
      break;
    case NativeCallEventType.accepted:
      connectToRoom(event.callId, event.extra);
      break;
    case NativeCallEventType.declined:
      notifyServerCallDeclined(event.callId);
      break;
    case NativeCallEventType.ended:
      if (event.isUserInitiated) {
        disconnectRoom(event.callId);
        notifyServer(event.callId, 'ended');
      }
      break;
    case NativeCallEventType.missed:
      showMissedCallNotification(event.callId);
      break;
    default:
      break;
  }
});

Configuration Options

AndroidCallConfig

Property	Type	Default	Description
`phoneAccountLabel`	`String`	Required	TelecomManager registration label
`notificationChannelName`	`String?`	`null`	Notification channel display name
`notificationChannelId`	`String?`	`null`	Custom notification channel ID
`useTelecomManager`	`bool`	`true`	Use ConnectionService + TelecomManager
`oemAdaptiveMode`	`bool`	`true`	Auto-detect budget OEMs

IosCallConfig

Property	Type	Default	Description
`supportsVideo`	`bool`	`false`	Enable video call support
`maximumCallGroups`	`int`	`1`	Max concurrent call groups
`maximumCallsPerCallGroup`	`int`	`1`	Max calls per group
`includesCallsInRecents`	`bool`	`true`	Show in Phone app Recents
`iconTemplateImageName`	`String?`	`null`	Custom CallKit icon asset
`ringtoneSound`	`String?`	`null`	Custom ringtone filename

Background Reject (Killed State)

When the user declines a call from the notification while the app is killed, the Dart isolate is unavailable. BackgroundRejectConfig enables a direct native HTTP request from Kotlin, bypassing Dart entirely:

await CallBundle.configure(NativeCallConfig(
  appName: 'MyApp',
  backgroundReject: BackgroundRejectConfig(
    urlPattern: 'https://api.example.com/v1/api/calls/{callId}/reject',
    httpMethod: 'PUT',
    authStorageKey: 'access_token',
    headers: {'X-Call-Id': '{callId}'},
    body: '{"reason": "user_declined"}',
    refreshToken: RefreshTokenConfig(
      url: 'https://api.example.com/v1/auth/refresh-token',
      refreshTokenKey: 'refresh_token',
      bodyTemplate: '{"refreshToken": "{refreshToken}"}',
      accessTokenJsonPath: 'data.accessToken',
      refreshTokenJsonPath: 'data.refreshToken',
    ),
  ),
  android: const AndroidCallConfig(phoneAccountLabel: 'MyApp'),
  ios: const IosCallConfig(),
));

Property	Type	Default	Description
`urlPattern`	`String`	Required	Full URL with `{key}` placeholders
`httpMethod`	`String`	`'PUT'`	HTTP method
`authStorageKey`	`String?`	`null`	Key in `flutter_secure_storage` for Bearer token
`authKeyPrefix`	`String?`	`null`	Custom key prefix for `flutter_secure_storage`
`headers`	`Map<String, String>`	`{}`	Additional request headers
`body`	`String?`	`null`	Request body (supports `{key}` placeholders)

Dynamic Placeholders

Placeholder	Description
`{callId}`	Unique call identifier
`{callerName}`	Display name of the caller
`{callType}`	Type of call (voice, video)
`{handle}`	Phone number or SIP address
`{uuid}`	Auto-generated UUID per request
any custom key	Any extra from the notification

iOS: Not needed — CallKit/PushKit keep the app alive during calls.

For detailed background reject and token refresh docs, see the callbundle_android README.

Advanced Usage

Outgoing calls

await CallBundle.showOutgoingCall(NativeCallParams(
  callId: 'outgoing-123',
  callerName: 'Jane Smith',
  handle: '+1987654321',
  callType: NativeCallType.voice,
  android: const AndroidCallParams(),
  ios: const IosCallParams(),
));

// When VoIP connects:
await CallBundle.setCallConnected('outgoing-123');

// When done:
await CallBundle.endCall('outgoing-123');

Get active calls

final calls = await CallBundle.getActiveCalls();
for (final call in calls) {
  print('${call.callerName} — ${call.state.name}');
}

Wait for native readiness

await CallBundle.onReady;

CallBundle

Table of Contents

Installation

Platform Setup

Android

iOS

Basic Usage

API Reference

CallBundle (Static API)

NativeCallConfig

NativeCallParams

NativeCallEvent

NativeCallPermissions

Permissions

What `requestPermissions()` does per platform

Battery Optimization Exemption

FCM Integration

iOS VoIP Push (PushKit)

Cold-Start Handling

Android Flow

iOS Flow

Event Handling

The `isUserInitiated` Pattern

Complete event handler

Configuration Options

AndroidCallConfig

IosCallConfig

Background Reject (Killed State)

Dynamic Placeholders

Advanced Usage

Outgoing calls

Get active calls

Wait for native readiness

Links

Libraries

callbundle package

CallBundle

Table of Contents

Installation

Platform Setup

Android

iOS

Basic Usage

API Reference

CallBundle (Static API)

NativeCallConfig

NativeCallParams

NativeCallEvent

NativeCallPermissions

Permissions

What requestPermissions() does per platform

Battery Optimization Exemption

FCM Integration

iOS VoIP Push (PushKit)

Cold-Start Handling

Android Flow

iOS Flow

Event Handling

The isUserInitiated Pattern

Complete event handler

Configuration Options

AndroidCallConfig

IosCallConfig

Background Reject (Killed State)

Dynamic Placeholders

Advanced Usage

Outgoing calls

Get active calls

Wait for native readiness

Links

Libraries

callbundle package

What `requestPermissions()` does per platform

The `isUserInitiated` Pattern