Add mediaStatusStream

lib/src/cast/CastContext.dart

@@ -6,7 +6,13 @@ import 'SessionManager.dart';
 
 /// Class wrapping the global context fot the Cast SDK
 class CastContext {
-  CastContext(this._hostApi);
+  CastContext(this._hostApi) {
+    this.sessionManager = SessionManager(_hostApi);
+  }
+
+  void dispose() {
+    this.sessionManager.dispose();
+  }
 
   final CastHostApi _hostApi;
 
@@ -25,16 +31,8 @@ class CastContext {
     _stateNotifier.value = CastState.values[castState];
   }
 
-  SessionManager? _sessionManager;
-
   /// Returns the SessionManager.
-  SessionManager get sessionManager {
-    var result = _sessionManager;
-    if (result == null) {
-      _sessionManager = result = SessionManager(_hostApi);
-    }
-    return result;
-  }
+  late SessionManager sessionManager;
 }
 
 /// The possible casting states.

lib/src/cast/RemoteMediaClient.dart

@@ -1,3 +1,5 @@
+import 'dart:async';
+
 import 'package:flutter/foundation.dart';
 import 'package:meta/meta.dart';
 
@@ -16,7 +18,13 @@ typedef MediaStatusListener = void Function(MediaStatus mediaStatus);
 
 /// Class for controlling a media player application running on a receiver.
 class RemoteMediaClient {
-  RemoteMediaClient(this._hostApi);
+  RemoteMediaClient(this._hostApi) {
+    this.mediaStatusStream = this._mediaStatusStreamController.stream;
+  }
+
+  void dispose() {
+    this._mediaStatusStreamController.close();
+  }
 
   final CastHostApi _hostApi;
 
@@ -40,6 +48,10 @@ class RemoteMediaClient {
   /// Called when there is an outgoing request to the receiver.
   VoidCallback? onSendingRemoteMediaRequest;
 
+  final _mediaStatusStreamController =
+      StreamController<MediaStatus>.broadcast();
+  late Stream<MediaStatus> mediaStatusStream;
+
   /// Called when updated ad break status information is received.
   MediaStatusListener? onAdBreakStatusUpdated;
 
@@ -90,4 +102,10 @@ class RemoteMediaClient {
   void dispatchPlayerStateUpdate(PlayerState playerState) {
     this._playerStateNotifier.value = playerState;
   }
+
+  /// Internal method that shouldn't be visible
+  @internal
+  void dispatchMediaStatusUpdate(MediaStatus mediaStatus) {
+    this._mediaStatusStreamController.add(mediaStatus);
+  }
 }

lib/src/cast/SessionManager.dart

@@ -6,7 +6,13 @@ import 'RemoteMediaClient.dart';
 /// A class that manages Session instances. The application can attach a
 /// listeners to be notified of session events.
 class SessionManager {
-  SessionManager(this._hostApi);
+  SessionManager(this._hostApi) {
+    this.remoteMediaClient = RemoteMediaClient(_hostApi);
+  }
+
+  void dispose() {
+    this.remoteMediaClient.dispose();
+  }
 
   final CastHostApi _hostApi;
 
@@ -68,16 +74,8 @@ class SessionManager {
     return await _hostApi.getCastDevice();
   }
 
-  RemoteMediaClient? _remoteMediaClient;
-
   /// Returns the RemoteMediaClient for remote media control.
-  RemoteMediaClient get remoteMediaClient {
-    var result = _remoteMediaClient;
-    if (result == null) {
-      _remoteMediaClient = result = RemoteMediaClient(_hostApi);
-    }
-    return result;
-  }
+  late RemoteMediaClient remoteMediaClient;
 }
 
 typedef MessageReceivedCallback = void Function(

lib/src/cast/widgets/expanded_controls/ExpandedControls.dart

@@ -230,12 +230,12 @@ class _ExpandedControlsState extends State<ExpandedControls> {
         this.widget.castFramework.castContext.sessionManager.remoteMediaClient;
 
     return SafeArea(
-      child: FutureBuilder(
-        future: remoteMediaClient.getMediaInfo(),
-        builder: (BuildContext context, AsyncSnapshot<MediaInfo> snapshot) {
-          if (snapshot.hasData) {
-            var mediaInfo = snapshot.data;
-            return _getFullControls(context, mediaInfo);
+      child: StreamBuilder<MediaStatus>(
+        stream: remoteMediaClient.mediaStatusStream,
+        builder: (BuildContext context, AsyncSnapshot<MediaStatus> snapshot) {
+          if (snapshot.hasData && snapshot.data?.mediaInfo != null) {
+            var mediaStatus = snapshot.data;
+            return _getFullControls(context, mediaStatus?.mediaInfo);
           } else if (snapshot.hasError) {
             return _getFullControls(context, null);
           } else {

lib/src/flutter_cast_framework.dart

@@ -111,7 +111,8 @@ class _CastFlutterApiImplementor extends CastFlutterApi {
   //region RemoteMediaClient
   @override
   void onAdBreakStatusUpdated(MediaStatus mediaStatus) {
-    remoteMediaClient.onAdBreakStatusUpdated?.call();
+    remoteMediaClient.onAdBreakStatusUpdated?.call(mediaStatus);
+    remoteMediaClient.dispatchMediaStatusUpdate(mediaStatus);
   }
 
   @override
@@ -143,6 +144,7 @@ class _CastFlutterApiImplementor extends CastFlutterApi {
   void onStatusUpdated(MediaStatus mediaStatus) {
     final playerState = mediaStatus.playerState ?? PlayerState.unknown;
     remoteMediaClient.dispatchPlayerStateUpdate(playerState);
+    remoteMediaClient.dispatchMediaStatusUpdate(mediaStatus);
   }
 
   @override