For example, if a smart television is located in a first room, and a smart projector is located in a second room, when a mobile phone is located in the first room, a playback control card of the smart television is displayed above a playback control card of the smart projector; or when the mobile phone is located in the second room, the playback control card of the smart projector is displayed above the playback control card of the smart television, and after the user stays for a period of time, the user is asked whether playback of multimedia content played on the smart projector needs to be resumed on the smart projector. In this design, the user can adjust an arrangement sequence of the playback control cards in different areas and on electronic devices in the different areas, so that viewing is more convenient, and a user experience effect is better.
In a possible design, the first device sends a playback control command to the second device in response to a second user input performed on the second control. The first device displays first prompt information when the first device does not receive a response message corresponding to the playback control command, where the first prompt information is used to indicate that playback control fails.
In a possible design, the first device detects that the first device is disconnected from the wireless network. The first device displays a third playback control card corresponding to the first multimedia content played by the second device, where the third playback control card includes the first control but does not include the second control.