Service based Android application on Google Play Store

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http://stackoverflow.com – I'm developing an application which will consists only of a few services and no activities (i.e. no UI) Basically I want to have 2 to 3 services to be running in the background right from when user installs the application on his/her device. I have a few questions over this: How will my services start after application installation? My BroadcastReceiver should be listening to which event? How can I package my application to deploy it application on Googly Play Store? (HowTos)