File access method, communication system, and electronic device

A file access method, comprising:

• receiving, by a second electronic device, an access request sent by a first electronic device that establishes a communication connection to the second electronic device;
• determining, by the second electronic device based on the access request, mapping information corresponding to a sandbox file that the first electronic device requests to access, wherein the mapping information comprises a mapping file corresponding to the sandbox file, a path of the mapping file, and a correspondence between the path of the mapping file and file index information of the sandbox file, the access request is generated by receiving a trigger operation performed by a user on the sandbox file, and the sandbox file corresponds to an application of the second electronic device and is comprised in a shared interface that is sent by the second electronic device and displayed by the first electronic device;
• and
• sending, by the second electronic device, the mapping information to the first electronic device, wherein the first electronic device accesses the sandbox file based on the mapping information.

A first electronic device, comprising:

• at least one processor;
• and
• at least one memory coupled to the at least one processor and storing programming instructions for execution by the at least one processor to cause the first electronic device to perform operations comprising:
• displaying a shared interface sent by a second electronic device that establishes a communication connection to the first electronic device, wherein the shared interface comprises a sandbox file corresponding to an application of the second electronic device;
• receiving a trigger operation performed by a user on the sandbox file;
• sending an access request to the second electronic device;
• receiving mapping information sent by the second electronic device;
• and
• accessing the sandbox file based on the mapping information, wherein the mapping information corresponds to the sandbox file and is determined by the second electronic device based on the access request, and the mapping information comprises a mapping file corresponding to the sandbox file, a path of the mapping file, and a correspondence between the path of the mapping file and file index information of the sandbox file.