Displaying media content on portable devices based upon user interface state transitions

A method of displaying media content on a display screen of a communication device including a processor and a memory including program code, an application program, and a user application. The application program includes a plurality of activities associated with a plurality of display windows rendered by the display screen. The method includes receiving, at a monitoring process, status callbacks provided by an operating system of the device wherein the status callbacks relate to memory state. Values of at least one of the status callbacks are inspected wherein the at least one of the status callbacks includes a user interface (UI) state value. Based at least in part upon inspection of the UI state value, it is determined that a first activity is finishing. Media content is then displayed upon the display screen upon further determining that a predetermined condition associated with the communication device exists.