title: Is there a broadcast action for volume changes?
body: <p>I'm programming a small widget that needs to be updated whenever the user changes the ringer volume or the vibrate settings.</p>
  
  <p>Capturing <code>android.media.VIBRATE_SETTING_CHANGED</code> works just fine for the vibrate settings, but I haven't found any way of getting notified when the ringer volume changes and although I could try to capture when the user presses the volume up/volume down physical keys, there are many other options for changing the volume without using these keys.</p>
  
  <p>Do you know if there's any broadcast action defined for this or any way to create one or to solve the problem without it?</p>