This has probably been done many times, but here is another one.  I wanted to play music and turn on lights right before my alarm went off, and I wanted to use an alarm clock on my device (Android).  So I created an app (https://github.com/Johboh/hassalarm) that will listen for the broadcast intent ACTION_NEXT_ALARM_CLOCK_CHANGED, which is sent once the next scheduled alarm is changed. This is sent by the system when any (decent) alarm clock schedule its next alarm. Once the app receives the int...