app doesn't work if only one media app is ticked in the settings

[GoogleCodeExporter]

What steps will reproduce the problem?
1. Select only one app in the settings (I use BubbleUpnp)

2. Hit play on Bluetooth headset

3. Nothing happens

What is the expected output? What do you see instead?

The media app should play immediately, and preferably no selector should be 
shown nor chk sound should be heard.

What version of the product are you using? 

1.4.0

On what version of android? On
what device?

4.2.1 On Nexus 4.

Please provide any additional information below.

I only care to use 1 media app, but the phone by itself won't launch it (if it 
is not already running) when I hit the headset play button. So I got Media 
Button Router, which should work when 1 app is in the settings. Unfortunately 
it only works when at least 2 apps are in the settings, which is suboptimal for 
people who like to use a single player, because it adds delay and sometimes 
guesses the wrong one.

Original issue reported on code.google.com by glide...@gmail.com on 13 Dec 2012 at 12:52

[GoogleCodeExporter]

I have the same issue.  I use this app as the media player I use (tune-in 
radio) doesn't auto start when my car connects to the phone.  I therefore tried 
to use this app and only select Tune-In as the available application.  
Unfortunately it doesn't work and Tune-In Radio never gets launched.  If I add 
another app to the list it works, but frequently guesses wrong and launches the 
incorrect music player, which defeats the point of using this app.

Original comment by d...@kippax-it.com on 2 Nov 2013 at 4:44

[GoogleCodeExporter]

The fix for this would be to always launch the app before forwarding the media 
button press to it, even if only a single app is selected. Right now how media 
button router is written, if only a single app is installed, everything should 
work as if media button wasn't installed (which means that if the receiver 
doesn't work when the app isn't launched, it still won't work). 

Original comment by harleens...@gmail.com on 27 Jan 2014 at 3:58

[GoogleCodeExporter]

The problem is not about having a single media app installed. We have
multiple media apps installed, but want to select only one (because we only
want to launch that particular one upon button press).
Can you please fix this? Ideally if only one app is selected, media button
router should forward the button press imediately and not launch the popup
for us to make a selection.

Original comment by glide...@gmail.com on 27 Jan 2014 at 5:02