Use high level track APIs in example app & docs (#36)

README.md

@@ -85,14 +85,23 @@ We built a multi-user conferencing app as an example in the [example/](example/)
 var room = await LiveKitClient.connect(url, token);
 try {
   // video will fail when running in ios simulator
-  var localVideo = await LocalVideoTrack.createCameraTrack();
-  await room.localParticipant.publishVideoTrack(localVideo);
+  await room.localParticipant.setCameraEnabled(true);
 } catch (e) {
   print('could not publish video: $e');
 }
 
-var localAudio = await LocalAudioTrack.createTrack();
-await room.localParticipant.publishAudioTrack(localAudio);
+await room.localParticipant.setMicrophoneEnabled(true);
+```
+
+### Advanced track manipulation
+
+The setCameraEnabled/setMicrophoneEnabled helpers are wrappers around the Track API.
+
+You can also manually create and publish tracks:
+
+```dart
+var localVideo = await LocalVideoTrack.createCameraTrack();
+await room.localParticipant.publishVideoTrack(localVideo);
 ```
 
 ### Rendering video
@@ -116,7 +125,7 @@ Widget build(BuildContext context) {
 
 ### Audio handling
 
-Audio tracks are rendered automatically as long as you are subscribed to them.
+Audio tracks are played automatically as long as you are subscribed to them.
 
 ### Handling changes
 

example/lib/pages/connect.dart

@@ -26,7 +26,7 @@ class _ConnectPageState extends State<ConnectPage> {
 
   final _uriCtrl = TextEditingController();
   final _tokenCtrl = TextEditingController();
-  bool _simulcast = false;
+  bool _simulcast = true;
   bool _busy = false;
 
   @override
@@ -48,7 +48,7 @@ class _ConnectPageState extends State<ConnectPage> {
     _uriCtrl.text = prefs.getString(_storeKeyUri) ?? '';
     _tokenCtrl.text = prefs.getString(_storeKeyToken) ?? '';
     setState(() {
-      _simulcast = prefs.getBool(_storeKeySimulcast) ?? false;
+      _simulcast = prefs.getBool(_storeKeySimulcast) ?? true;
     });
   }
 

example/lib/pages/room.dart

@@ -68,19 +68,17 @@ class _RoomPageState extends State<RoomPage> {
     if (result != true) return;
     // video will fail when running in ios simulator
     try {
-      // Create video track
-      final localVideo = await LocalVideoTrack.createCameraTrack();
-      // Try to publish the video
-      await widget.room.localParticipant.publishVideoTrack(localVideo);
-
-      // Create mic track
-      final localAudio = await LocalAudioTrack.create();
-      // // Try to publish audio
-      await widget.room.localParticipant.publishAudioTrack(localAudio);
+      await widget.room.localParticipant.setCameraEnabled(true);
     } catch (error) {
       print('could not publish video: $error');
       await context.showErrorDialog(error);
     }
+    try {
+      await widget.room.localParticipant.setMicrophoneEnabled(true);
+    } catch (error) {
+      print('could not publish audio: $error');
+      await context.showErrorDialog(error);
+    }
   }
 
   void _onRoomDidUpdate() {

example/lib/widgets/controls.dart

@@ -53,47 +53,18 @@ class _ControlsWidgetState extends State<ControlsWidget> {
 
   void _disableAudio() async {
     await participant.setMicrophoneEnabled(false);
-    // The following code is an example how to mute a track
-    // if (participant.hasAudio) {
-    // final audioPub = participant.audioTracks.first;
-    // audioPub.muted = true;
-    // }
   }
 
   Future<void> _enableAudio() async {
     await participant.setMicrophoneEnabled(true);
-    // The following code is an example how to unmute / publish a audio track
-    // if (participant.hasAudio) {
-    //   final audioPub = participant.audioTracks.first;
-    //   audioPub.muted = false;
-    // } else {
-    //   // publish audio track
-    //   final audioTrack = await LocalAudioTrack.create();
-    //   await participant.publishAudioTrack(audioTrack);
-    // }
   }
 
   void _disableVideo() async {
     await participant.setCameraEnabled(false);
-    // The following code is an example how to mute a video track
-    // if (participant.hasVideo) {
-    //   final videoPub = participant.videoTracks.first;
-    //   videoPub.muted = true;
-    // }
   }
 
   void _enableVideo() async {
     await participant.setCameraEnabled(true);
-    // The following code is an example how to unmute / publish a video track
-    // if (participant.hasVideo) {
-    //   print('Un-muting video');
-    //   final videoPub = participant.videoTracks.first;
-    //   videoPub.muted = false;
-    // } else {
-    //   // publish audio track
-    //   final videoTrack = await LocalVideoTrack.createCameraTrack();
-    //   await participant.publishVideoTrack(videoTrack);
-    // }
   }
 
   void _toggleCamera() async {