Abstract: A mobile terminal includes a storing module, a control module, and a locking module. The storing module is used for storing a plurality of messages. The control module is used for obtaining a message number corresponding to a message of the plurality of messages after determining the message associated with a reference condition. The locking module is used for locking the message according to the message number.

Abstract: A mobile terminal includes a storing module, an analysis module, and a processing module. The storing module is used for storing a plurality of messages. The analysis module is used for obtaining a message number corresponding to a selected message of the plurality of messages after determining a storing time of the selected message stored in the storing module more than a reference time when the selected message is in a read and unlocked status. The processing module is used for deleting the selected message according to the message number.

Abstract: An electronic device includes resistor, a pointer, a measuring module, a calculating module, and a display module. The resistor has a reference point corresponding with a reference direction. The resistor defines a circle. The pointer has a pointing terminal contacting the resistor at a contacting point corresponding with a reference direction. The pointer is pivotablely mounted about a centre of the circle. The pointer is aligned with the magnetic field of the Earth, and the measuring module measures the voltage between the contacting point and the reference point. The calculating module calculates an angle between the current direction and the reference direction according to the voltage between the contacting point and the reference point of the resistor. The display module displays corresponding direction information according to the angle.

Abstract: An electronic device includes resistor, a pointer, a measuring module, a calculating module, and a display module. The resistor has a reference point corresponding with a reference direction. The resistor defines a circle. The pointer has a pointing terminal contacting the resistor at a contacting point corresponding with a reference direction. The pointer is pivotablely mounted about a centre of the circle. The pointer is aligned with the magnetic field of the Earth, and the measuring module measures the voltage between the contacting point and the reference point. The calculating module calculates an angle between the current direction and the reference direction according to the voltage between the contacting point and the reference point of the resistor. The display module displays corresponding direction information according to the angle.