Choose default music player to play / pause music on hands-free button press I like the feature to use button on the hands-free (headset) to play / pause music. I have a bunch of music players installed on my phone: Apollo, Sony Walkman, Play Music, etc. When I use the hands-free button to play music, every time it plays music from any one of the players. Is there any way to set a default player to play music on the hands-free button press?

Say for example, I want only Sony Walkman to play music when I press button on the hands-free instead of launching any other player randomly.

Can this be done?

I have a Sony Xperia Neo V (code name: Haida) running CyanogenMod 9. Android version 4.0.4.
You could check the playstore for headset control apps. Having a Philips headset, Philips Headset works perfectly for me -- and lets me define which player app to launch as soon as the headset is connected, plus gives me a bunch of control options for the headset's single button (e.c. click for play/pause or take call, long-press to increase volume, click twice to skip a title or reject a call, and more).

There are many more similar apps available. Quite famous examples include e.g. JAYS Headset Control (which did not work that well with my Philips headset -- but that may be caused by the headset itself), and Headset Button Controller. Simply search the playstore for "headset control" for more options.