Answering incoming call on dual-screen mobile device

1. A method of answering an incoming call on a dual-screen mobile device, the method comprising:

upon receiving an incoming call, displaying an incoming call operation option on a first screen of two screens included on the dual-screen mobile device, wherein the first screen is located on a first surface of a main body that is opposite a second surface, wherein the main body comprises:

a first headphone having a first sound exit surface in communication with one of a first sound opening on the first surface where the first screen is located or a second sound opening; and

a second headphone having a second sound exit surface in communication with the other one of the first sound opening or the second sound opening not in communication with the first headphone;

determining an answer operation performed by a user in response to the incoming call operation option;

determining an answer option based on the answer operation, wherein the answer option includes implementing an answering operation of the incoming call on a second screen that is located on the second surface; and

in response to determining that the answer option presents the answering operation on the second screen, outputting a sound of the incoming call from the second sound opening located on the second surface.

2. The method of claim 1 , further comprising:

determining whether to display the incoming call operation option on the first screen or the second screen according to a pre-determined incoming call display rule comprising at least one of the following:

displaying the incoming call operation option on the first screen;

displaying the incoming call operation option on a currently-awakened screen of the first screen and the second screen;

displaying the incoming call operation option on a screen currently facing up of the first screen and the second screen;

displaying the incoming call operation option on a last-awakened screen of the first screen and the second screen; and

displaying the incoming call operation option on both of the first screen and the second screen.

3. The method of claim 1 , wherein outputting the sound of the incoming call from the second sound opening comprises:

awakening the second screen; and

outputting the sound of the incoming call from the second sound opening on the second surface where the second screen is also located.

4. The method of claim 3 , wherein awakening the second screen comprises:

displaying associated information of the incoming call and a set of available call functions on the awakened second screen.

5. The method of claim 1 , wherein outputting the sound of the incoming call from the second sound opening on the second surface where the second screen is located comprises:

activating one of the first headphone or the second headphone in communication with the second sound opening.

6. The method of claim 5 , further comprising:

determining one or more audio parameters corresponding to a headphone identifier of an activated headphone for the second screen, according to a correspondence between the headphone identifier and the one or more audio parameters; and

adjusting the activated headphone for the second screen according to the determined one or more audio parameters.

7. A method of answering an incoming call on a dual-screen mobile device, the method comprising:

upon receiving an incoming call, displaying an incoming call operation option on a first screen of two screens included on the dual-screen mobile device, wherein the first screen is located on a first surface of a main body that is opposite a second surface, wherein the main body comprises:

a headphone having a first sound exit surface and a second sound exit surface opposite to the first sound exit surface;

a first electromagnetic valve on a passage from the first sound exit surface of the headphone to one of a first sound opening on the first surface where the first screen is located or the second sound opening; and

a second electromagnetic valve on a passage from the second sound exit surface of the headphone to the other one of the first sound opening or the second sound opening;

determining an answer operation performed by a user in response to the incoming call operation option;

determining an answer option based on the answer operation, wherein the answer option includes implementing an answering operation of the incoming call on a second screen that is located on the second surface; and

in response to determining that the answer option presents the answering operation on the second screen, outputting a sound of the incoming call from a second sound opening located on the second surface.

8. The method of claim 7 , wherein outputting the sound of the incoming call from the second sound opening comprises:

opening the second electromagnetic valve between the headphone and the second sound opening on the second surface where the second screen is located;

closing the first electromagnetic valve between the headphone and the first sound opening on the first surface where the first screen is located; and

activating the headphone.

9. A dual-screen mobile device, comprising:

two screens comprising a first screen and a second screen;

a main body comprising a first surface and a second surface opposite to the first surface, wherein the second screen and the first screen are located on opposite surfaces of the main body;

a first sound opening located on the first surface;

a second sound opening located on the second surface;

the main body further comprising:

a first headphone having a first sound exit surface in communication with one of the first sound opening or the second sound opening; and

a second headphone having a second sound exit surface in communication with the other one of the first sound opening or the second sound opening not in communication with the first headphone;

a processor; and

a memory configured to store processor-executable instructions that, when executed by the processor, cause the processor to:

upon receiving an incoming call, display an incoming call operation option on the first screen of the dual-screen mobile device;

determine an answer operation performed by a user in response to the incoming call operation option;

determine an answer option based on the answer operation, wherein the answer option includes implementing an answering operation of the incoming call on the second screen; and

in response to determining that the answer option presents the answering operation on the second screen, output a sound of the incoming call from the second sound opening located on the second surface.

10. The dual-screen mobile device of claim 9 , wherein the processor-executable instructions, when executed by the processor, further cause the processor to:

determine whether to display the incoming call operation option on the first screen or the second screen according to a pre-determined incoming call display rule comprising at least one of the following:

displaying the incoming call operation option on the first screen;

displaying the incoming call operation option on a currently-awakened screen of the first screen and the second screen;

displaying the incoming call operation option on a screen currently facing up of the first screen and the second screen;

displaying the incoming call operation option on a last-awakened screen of the first screen and the second screen; and

displaying the incoming call operation option on both of the first screen and the second screen.

11. The dual-screen mobile device of claim 9 , wherein the processor-executable instructions, when executed by the processor, causes the processor to output the sound of the incoming call from the second sound opening by:

awakening the second screen; and

outputting the sound of the incoming call from the second sound opening.

12. The dual-screen mobile device of claim 11 , wherein the processor-executable instructions, when executed by the processor, further causes the processor to:

display associated information of the incoming call and a set of available call functions on the awakened second screen.

13. The dual-screen mobile device of claim 9 , wherein the processor-executable instructions, when executed by the processor, further causes the processor to:

activate one of the first headphone or the second headphone in communication with the second sound opening.

14. The dual-screen mobile device of claim 13 , wherein the processor-executable instructions, when executed by the processor, further causes the processor to:

determine one or more audio parameters corresponding to a headphone identifier of an activated headphone for the second screen, according to a correspondence between the headphone identifier and the one or more audio parameters; and

adjust the activated headphone for the second screen according to the determined one or more audio parameters.