Chromecast Android Sender RemoteMediaPlayer producing No current media session

Question

I have been able to successfully cast video to a Chromecast and have the option let the video play when disconnecting and it all works great. However, if I choose to quit the ap

Answer 1

As user3408864 pointed out, requestStatus() after rejoining the session works. Here is how i managed to solve it in my case and it should work in yours.

     if(MAIN_ACTIVITY.isConnected()){

            if(MAIN_ACTIVITY.mRemoteMediaPlayer == null){
                MAIN_ACTIVITY.setRemoteMediaPlayer();
            }

            MAIN_ACTIVITY.mRemoteMediaPlayer.requestStatus(MAIN_ACTIVITY.mApiClient).setResultCallback( new ResultCallback<RemoteMediaPlayer.MediaChannelResult>() {
                @Override 
                public void onResult(RemoteMediaPlayer.MediaChannelResult mediaChannelResult) {
                    if(playToggle ==0){

                        try {
                            MAIN_ACTIVITY.mRemoteMediaPlayer.pause(MAIN_ACTIVITY.mApiClient);
                            playToggle =1;
                        } catch (IOException e) {
                            e.printStackTrace();
                        }
                    }else{

                        try {
                            MAIN_ACTIVITY.mRemoteMediaPlayer.play(MAIN_ACTIVITY.mApiClient);
                            playToggle =0;
                        } catch (IOException e) {
                            e.printStackTrace();
                        }
                    }

                }
            });

        }

Ignore, MAIN_ACTIVITY, it is just a static reference to my activity since i run this piece of code from a Service. Also, setRemoteMediaPlayer() is a method where i create a new RemoteMediaPlayer() and attach the corresponding Listeners.

Hopefully this helps. Also, sorry if any mistake, it is my first post to StackOverFlow.

Answer 2

The media session ID is part of the internal state of the RemoteMediaPlayer object. Whenever the receiver state changes, it sends updated state information to the sender, which then causes the internal state of the RemoteMediaPlayer object to get updated.

If you disconnect from the application, then this state inside the RemoteMediaPlayer will be cleared.

When you re-establish the connection to the (still running) receiver application, you need to call RemoteMediaPlayer.requestStatus() and wait for the OnStatusUpdatedListener.onStatusUpdated() callback. This will fetch the current media status (including the current session ID) from the receiver and update the internal state of the RemoteMediaPlayer object accordingly. Once this is done, if RemoteMediaPlayer.getMediaStatus() returns non-null, then it means that there is an active media session that you can control.