Electronic device and application program switching method thereof

摘要

An application program switching method for an electronic device having a first body and a second body is provided. A relative position of the first body and the second body is changed from a first state to a second state to activate a second application program while an external message is received during a first application program being executed, and an image displayed by the electronic device is switched from an executing frame of the first application program to an executing frame of the second application program for replying the external message via a keyboard of the second body. Next, the relative position of the first body and the second body is changed from the second state to the first state, and the image displayed by the electronic device is switched from the executing frame of the second application program to the executing frame of the first application program.