MethodChannelFlutterMultiDisplay class

An implementation of FlutterMultiDisplayPlatform that uses method channels.

This class provides the Android implementation of the flutter_multi_display plugin using Flutter's method channel mechanism for communication between Dart and native Kotlin/Java code.

Method Channel Communication

This implementation communicates with the native Android plugin via the flutter_multi_display/shared_state method channel. It sends method calls to native code and receives responses asynchronously.

Supported Methods

The following methods are invoked on the native side:

• getPlatformVersion: Gets the Android version
• updateState: Updates shared state
• getState: Retrieves state for a type
• getAllState: Retrieves all states
• clearState: Clears state for a type
• setupMultiDisplay: Initializes multi-display

Testing

The methodChannel field is exposed with @visibleForTesting to allow unit tests to mock the method channel behavior.

Example test:

test('getPlatformVersion returns correct value', () async {
  const channel = MethodChannel('flutter_multi_display/shared_state');
  TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger
      .setMockMethodCallHandler(channel, (call) async {
    if (call.method == 'getPlatformVersion') {
      return 'Android 11';
    }
    return null;
  });

  final platform = MethodChannelFlutterMultiDisplay();
  expect(await platform.getPlatformVersion(), 'Android 11');
});

Inheritance

• Object
• PlatformInterface
• FlutterMultiDisplayPlatform
• MethodChannelFlutterMultiDisplay

Constructors

MethodChannelFlutterMultiDisplay()

Properties

hashCode → int

The hash code for this object.

no setter, inherited

methodChannel → MethodChannel

The method channel used to interact with the native platform.

final

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

clearState(String type) → Future<void>

Clears the shared state for a specific type.

override

getAllState() → Future<Map<String, dynamic>>

Retrieves all shared states across all types.

override

getPlatformVersion() → Future<String?>

Gets the platform version from the native Android platform.

override

getState(String type) → Future<Map<String, dynamic>?>

Retrieves the shared state for a specific type.

override

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

setupMultiDisplay(List<String> entrypoints, {bool portBased = false}) → Future<void>

Initializes the multi-display functionality with the specified configuration.

override

toString() → String

A string representation of this object.

inherited

updateState(String type, Map<String, dynamic>? state) → Future<void>

Updates the shared state for a specific type.

override

Operators

operator ==(Object other) → bool

The equality operator.

inherited