Activation manager controls the life cycle of the app
Content providers encapsulate data that is shared (e.g. contacts)
Resource manager manages everything that is not the code
Location manager figures out the location of the phone (GPS, GSM, WiFi)
Notification manager for events such as arriving messages, appointments, etc
Content providers encapsulate data that is shared (e.g. contacts)
Resource manager manages everything that is not the code
Location manager figures out the location of the phone (GPS, GSM, WiFi)
Notification manager for events such as arriving messages, appointments, etc
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