Abstract: An electronic device and volume adjusting method detect ambient light and generate corresponding intensity signals via a sensor. Programs in a storage device, executed by at least one processor, cause the at least one processor to receive and sample light intensity signals and determine whether the ambient light level is changing. Time passing is counted if the ambient light level is changing, until the ambient light level stops changing. The counting of time stops when ambient light level stops changing and the counted time period is compared with a preset time period, a longer time period causes a volume adjusting command to be sent to a playback output device.

Abstract: An alarm control method for turning off an alarm for an electronic device includes the following steps: detecting that an alarm by an alarm unit of an electronic device being activated; converting an intensity of prevailing ambient light directed by an optical sensor of the electronic device to ambient light signals; determining whether an ambient light value has changed based on the ambient light signals; and determining whether a change in the ambient light value is equal to or greater than a first predetermined value if the ambient light value has changed, and in event turning off upon such determination. An electronic device using the method is also provided.

Abstract: An electronic device and volume adjusting method detect ambient light and generate corresponding intensity signals via a sensor. Programs in a storage device, executed by at least one processor, cause the at least one processor to receive and sample light intensity signals and determine whether the ambient light level is changing. Time passing is counted if the ambient light level is changing, until the ambient light level stops changing. The counting of time stops when ambient light level stops changing and the counted time period is compared with a preset time period, a longer time period causes a volume adjusting command to be sent to a playback output device.