CN111722919B - Method, device, storage medium and electronic device for running background application - Google Patents

Abstract

The present disclosure relates to a method, an apparatus, a storage medium, and an electronic device for running an application program, where the method includes: determining a target application program operated by a foreground; monitoring whether the target application program is switched from a foreground operation to a background operation; and when the target application program is switched from the foreground operation to the background operation, limiting the use time of the target application program to the CPU of the central processing unit so as to improve the use time of the application program running in the foreground to the CPU.

Description

Method, device, storage medium and electronic device for running background application

Technical Field

The present disclosure relates to the field of communication technology, and in particular to a method, device, storage medium and electronic device for running a background application.

Background technique

Nowadays, when applications in electronic devices are not in use, they will enter the background of the electronic devices. However, maintaining the normal operation of background applications requires consuming CPU (Central Processing Unit) resources, which may cause problems such as foreground program lag and excessive power consumption.

Summary of the invention

In order to overcome the problems existing in the related art, the present disclosure provides a method, device, storage medium and electronic device for running a background application.

According to a first aspect of an embodiment of the present disclosure, a method for running a background application is provided, including determining a target application running in the foreground; monitoring whether the target application switches from foreground operation to background operation; and when the target application switches from foreground operation to background operation, limiting the usage time of a central processing unit (CPU) by the target application to increase the usage time of the CPU by the application running in the foreground.

Optionally, limiting the CPU usage time of the target application includes: obtaining a preset background application group, wherein a first usage time occupancy rate of the CPU usage time of all applications in the background application group is less than or equal to a first preset occupancy rate threshold; the first usage time occupancy rate is the ratio of the sum of the CPU usage time of each application in the background application group to the total CPU usage time; and adding the target application to the background application group.

Optionally, limiting the CPU usage time of the target application includes: controlling a second CPU usage time occupancy rate of the target application to be less than or equal to a second preset occupancy rate threshold, the second CPU usage time occupancy rate being the ratio of the CPU usage time of the target application to the total CPU usage time.

Optionally, before limiting the target application's CPU usage time, the method further includes: determining whether the target application is a pre-set trusted application; limiting the target application's CPU usage time includes: when it is determined that the target application is not the trusted application, limiting the target application's CPU usage time.

Optionally, after limiting the usage time of the CPU by the target application, the method further comprises: when the target application switches from running in the background to running in the foreground, canceling the limitation on the usage time of the CPU by the target application.

According to a second aspect of an embodiment of the present disclosure, a device for running an application is provided, comprising a target determination module, configured to determine a target application running in the foreground; a monitoring module, configured to monitor whether the target application is switched from foreground operation to background operation; and a processing module, configured to limit the usage time of a central processing unit (CPU) by the target application when the target application is switched from foreground operation to background operation, so as to increase the usage time of the CPU by the application running in the foreground.

Optionally, the processing module is configured to: when the target application switches from the foreground operation to the background operation, obtain a pre-set background application group, wherein a first usage time occupancy rate of the CPU usage time of all applications in the background application group is less than or equal to a first preset occupancy rate threshold; the first usage time occupancy rate is the ratio of the sum of the CPU usage time of each application in the background application group to the total CPU usage time; and add the target application to the background application group.

Optionally, the processing module is configured to: when the target application switches from the foreground operation to the background operation, control the second usage time occupancy rate of the target application on the CPU to be less than or equal to a second preset occupancy rate threshold, and the second usage time occupancy rate is the ratio of the CPU usage time of the target application to the total CPU usage time.

Optionally, the device also includes: a trust determination module, configured to determine whether the target application is a pre-set trusted application; the processing module, configured to limit the target application's use of the CPU time when it is determined that the target application is not the trusted application when the target application switches from the foreground operation to the background operation.

Optionally, the device further comprises: a restriction cancelling module configured to cancel the restriction on the CPU usage time of the target application when the target application switches from running in the background to running in the foreground.

According to a third aspect of an embodiment of the present disclosure, a computer-readable storage medium is provided, on which computer program instructions are stored. When the program instructions are executed by a processor, the steps of the method for running an application provided in the first aspect of the present disclosure are implemented.

According to a fourth aspect of an embodiment of the present disclosure, an electronic device is provided, comprising the device for running an application provided by the second aspect of the present disclosure.

The technical solution provided by the embodiments of the present disclosure can limit the use of the CPU by background applications when the applications enter the background, thereby reducing the consumption of CPU power by background applications, and improve the use of the CPU by applications running in the foreground, thereby increasing the operating performance of the foreground applications.

It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

Fig. 1 is a flowchart showing a method for running an application according to an exemplary embodiment.

Fig. 2 is a flow chart showing a method for running an application according to another exemplary embodiment.

Fig. 3 is a flowchart showing a method for running an application according to another exemplary embodiment.

Fig. 4 is a block diagram showing a device for running an application according to an exemplary embodiment.

Fig. 5 is a block diagram showing a device for running an application according to another exemplary embodiment.

Fig. 6 is a block diagram showing a device for running an application according to another exemplary embodiment.

Fig. 7 is a block diagram of an electronic device according to an exemplary embodiment.

Detailed ways

Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

Fig. 1 is a flow chart showing a method for running a background application according to an exemplary embodiment. As shown in Fig. 1 , the method can be applied to an electronic device, and the method includes the following steps.

In step S101, a target application running in the foreground is determined.

In step S102, it is monitored whether the target application is switched from foreground operation to background operation.

When the target application is opened and being used by the user, the target application will run in the foreground and its operation page will also be displayed in the foreground. When the operation page of the target application is exited but the target application is not closed, the target application will run in the background.

In this embodiment, the target application can be run on the electronic device, and the electronic device can be a mobile phone with different operating systems, such as an Android phone, an Apple phone, etc.

When the electronic device is an Android phone, the phone can register a listener based on the component management service provided by the Android system, and monitor the foreground and background switching status of the current application through the listener.

Of course, the specific monitoring process of the foreground and background running of the above application can refer to the monitoring of the foreground and background running of the application in the prior art, which will not be repeated here.

In step S103, when the target application is switched from the foreground operation to the background operation, the usage time of the central processing unit (CPU) by the target application is limited to increase the usage time of the CPU by the foreground application.

In this step, the target application can limit the CPU usage time by using either of the following two implementation methods:

Method 1: obtain a preset background application group, and add the target application to the background application group.

Among them, the first usage time occupancy rate of the usage time of the CPU by all applications in the background application group is less than or equal to the first preset occupancy rate threshold; the first usage time occupancy rate is the ratio of the sum of the usage time of the CPU by each application in the background application group to the total usage time of the CPU. The first usage time occupancy rate can be achieved by modifying the CPU time occupancy value in the CPU.shares file of the background application group. The CPU time occupancy value in the CPU.shares file of the background application group can represent the usage time of the CPU by all applications in the background application group. The larger the CPU time occupancy value, the longer the CPU is used by all applications in the background application group. The default value of the CPU time occupancy value is 1024. The ratio of the CPU time occupancy value to the default value is the CPU usage time occupancy rate.

For example, when the target application switches from foreground operation to background operation, the target application is added to the background application group. The first preset occupancy rate threshold may be 5%, and the CPU time occupancy value in the CPU.shares file of the background application group may be pre-set to 52, that is, the CPU usage time of the background application group is 5% of the total CPU usage time (52÷1024×100%=5%); when there is one target application in the background application group, the CPU usage time of the target application is 5% of the total CPU usage time; when there are two target applications in the background application group, the CPU usage time of the two target applications (that is, all applications in the background application group) is 5% of the total CPU usage time.

Method 2: Control the second usage time occupancy rate of the target application to be less than or equal to the second preset occupancy rate threshold, and the second usage time occupancy rate is the ratio of the usage time of the target application to the total usage time of the CPU. Similarly, the second usage time occupancy rate can also be achieved by modifying the CPU time occupancy value in the CPU.shares file of the application. Similarly, the CPU time occupancy value of the application can represent the usage time of the application on the CPU. The larger the CPU time occupancy value, the longer the application uses the CPU. The default value of the CPU time occupancy value is 1024.

For example, the second preset occupancy rate threshold can be 2.5%. When the target application switches from foreground operation to background operation, the CPU time occupancy value of the target application can be set to 25. Then the second usage time occupancy rate is 25/1024, which is 2.4%. The CPU usage time of the application is 2.4% of the total CPU usage time. The CPU occupancy time of the application can be limited without closing the application.

It should be noted that the difference between the above-mentioned method 1 and method 2 is that method 1 limits the total CPU usage time of all background running applications, while method 2 limits the CPU usage time of each background running application.

In a possible implementation, when the target application is switched from the background operation to the foreground operation, the restriction on the CPU usage time of the target application is cancelled. Correspondingly, when the first method is used to limit the CPU usage time of the target application, the target application can be removed from the background group when the target application is switched from the background operation to the foreground operation; when the second method is used to limit the CPU usage time of the target application, the modification of the CPU time occupancy value of the target application can be restored when the target application is switched from the background operation to the foreground operation.

Through this method, when an application enters the background, the use of the CPU by the background application is limited, thereby reducing the CPU power consumption of the background application, and increasing the use of the CPU by the foreground application, thereby improving the running performance of the foreground application.

Fig. 2 is a flow chart showing a method for running a background application according to another exemplary embodiment. Referring to Fig. 2 , the method includes the following steps.

In step S201, a target application running in the foreground is determined.

In step S202, it is monitored whether the target application is switched from foreground operation to background operation.

When the target application is opened and being used by the user, the target application will run in the foreground and its operation page will also be displayed in the foreground. When the operation page of the target application is exited but the target application is not closed, the target application will run in the background.

In this embodiment, the target application may be run on an electronic device, which may be a mobile phone with different operating systems, such as an Android phone, an Apple phone, etc.

When the electronic device is an Android phone, the phone can register a listener based on the component management service provided by the Android system, and monitor the foreground and background switching status of the current application through the listener.

Of course, the specific monitoring process of the foreground and background running of the above application can refer to the monitoring of the foreground and background running of the application in the prior art, which will not be repeated here.

When the target application is not switched from the foreground operation to the background operation, the CPU usage time occupancy rate of the target application is not limited.

When the target application is switched from the foreground operation to the background operation, step S203 is executed.

In step S203, it is determined whether the target application is a preset trusted application.

In this step, a list of trusted applications can be obtained, and it can be determined whether the target application is in the list of trusted applications. When the target application is in the list of trusted applications, it can be determined that the target application is a trusted application, and when the target application is not in the list of trusted applications, it can be determined that the target application is not the trusted application.

When the target application is determined to be a trusted application, the CPU usage time occupancy rate of the target application is not restricted.

When it is determined that the target application is not the trusted application, step S204 is executed.

In step 204, a preset background application group is obtained, wherein the total usage time occupancy of the CPU by all application programs in the background application group is less than or equal to a preset occupancy threshold.

Among them, the sum of the usage time occupancy of all applications in the background application group on the CPU is the ratio of the sum of the usage time of all applications in the background application group on the CPU to the total usage time of the CPU. By limiting the CPU usage time of the background application group, the CPU usage time of the applications in the group can be limited, so that the ratio of the sum of the usage time of all applications in the background application group on the CPU to the total usage time of the CPU is less than or equal to the preset occupancy threshold. The usage time occupancy rate can be achieved by modifying the CPU time occupancy value in the CPU.shares file of the background application group. The CPU time occupancy value in the CPU.shares file of the background application group can represent the usage time of all applications in the background application group on the CPU. The larger the CPU time occupancy value, the longer the time all applications in the background application group use the CPU. The default value of the CPU time occupancy value is 1024, and the ratio of the CPU time occupancy value to the default value is the CPU usage time occupancy rate.

For example, the preset occupancy rate threshold may be 5%, and the CPU time occupancy value in the CPU.shares file of the background application group may be pre-set to 52, that is, the CPU usage time of the background application group is 5% of the total CPU usage time (52÷1024×100%=5%); when there is one target application in the background application group, the CPU usage time of the target application is 5% of the total CPU usage time; when there are two target applications in the background application group, the CPU usage time of the two target applications (that is, all applications in the background application group) is 5% of the total CPU usage time.

In step S205, the target application is added to the background application group.

After the target application is added to the background application group, the CPU usage time of the target application will be limited because the CPU usage time of all applications in the background application group will be limited to the total CPU usage time. For example, when the CPU usage time occupancy rate of the background application group is 5%, the maximum CPU usage time occupancy rate of the target application is 5%. When there are other target applications in the background application group, the maximum value of the total CPU usage time occupancy rate of the target application and the other target applications is 5%.

In step S206, when the target application is switched from the background operation to the foreground operation, the target application is removed from the background application group.

When the target application is switched from background operation to foreground operation, the target application can be removed from the background application group. After leaving the background application group, the CPU usage time of the target application will not be limited by the CPU usage time of the background application group.

Through this method, when an application enters the background, the use of the CPU by the background application is limited, thereby reducing the CPU power consumption of the background application, and increasing the use of the CPU by the foreground application, thereby improving the running performance of the foreground application.

Fig. 3 is a flow chart showing a method for running a background application according to another exemplary embodiment. Referring to Fig. 3 , the method includes the following steps.

In step S301, a target application running in the foreground is determined.

In step S302, it is monitored whether the target application is switched from foreground operation to background operation.

When the target application is opened and being used by the user, the target application will run in the foreground and its operation page will also be displayed in the foreground. When the operation page of the target application is exited but the target application is not closed, the target application will run in the background.

In this embodiment, the target application may be run on an electronic device, which may be a mobile phone with different operating systems, such as an Android phone, an Apple phone, etc.

When the electronic device is an Android phone, the phone can register a listener based on the component management service provided by the Android system, and monitor the foreground and background switching status of the current application through the listener.

Of course, the specific monitoring process of the foreground and background running of the above application program can refer to the monitoring of the foreground and background running of the application program in the prior art, which will not be repeated here.

When the target application is not switched from the foreground operation to the background operation, the CPU usage time occupancy rate of the target application is not limited.

When the target application is switched from the foreground operation to the background operation, step S303 is executed.

In step S303, it is determined whether the target application is a preset trusted application.

In this step, a list of trusted applications can be obtained, and it can be determined whether the target application is in the list of trusted applications. When the target application is in the list of trusted applications, it can be determined that the target application is a trusted application, and when the target application is not in the list of trusted applications, it can be determined that the target application is not the trusted application.

When the target application is determined to be a trusted application, the CPU usage time occupancy rate of the target application is not restricted.

When it is determined that the target application is not the trusted application, step S304 is executed.

In step S304, the CPU usage time occupancy rate of the target application is controlled to be less than or equal to a preset occupancy rate threshold.

In this step, the usage time occupancy rate is the ratio of the CPU usage time of the target application to the total CPU usage time. The usage time occupancy rate can be achieved by modifying the CPU time occupancy value in the CPU.shares file of the application. The CPU time occupancy value in the CPU.shares file of the background application group can represent the CPU usage time of all applications in the background application group. The larger the CPU time occupancy value, the longer the CPU is used by all applications in the background application group. The default value of the CPU time occupancy value is 1024. The ratio of the CPU time occupancy value to the default value is the CPU usage time occupancy rate.

For example, the preset occupancy threshold can be 2.5%. When the target application switches from foreground to background, the CPU time occupancy value can be set to 25. The preset occupancy rate is 25/1024, which is 2.4%. The CPU usage time of the application is 2.4% of the total CPU usage time. The CPU occupancy time of the application can be limited without closing the application.

In step S305, when the target application is switched from the background operation to the foreground operation, the restriction on the CPU usage time occupancy rate by the target application is cancelled.

In this step, the modification of the CPU time usage value can be restored.

Through this method, when an application enters the background, the use of the CPU by the background application is limited, thereby reducing the CPU power consumption of the background application, and increasing the use of the CPU by the foreground application, thereby improving the running performance of the foreground application.

Fig. 4 is a block diagram of a device for running an application according to an exemplary embodiment. Referring to Fig. 4 , the device 400 includes a target determination module 401 , a monitoring module 402 and a processing module 403 .

The target determination module 401 is configured to determine a target application running in the foreground.

The monitoring module 402 is configured to monitor whether the target application is switched from foreground operation to background operation.

The processing module 403 is configured to limit the usage time of the central processing unit (CPU) of the target application when the target application switches from the foreground operation to the background operation, so as to increase the usage time of the CPU of the foreground application.

Optionally, the processing module 403 is configured to obtain a pre-set background application group when the target application switches from the foreground operation to the background operation, wherein a first usage time occupancy rate of the CPU usage time of all applications in the background application group is less than or equal to a first preset occupancy rate threshold; the first usage time occupancy rate is the ratio of the sum of the usage time of the CPU by each application in the background application group to the total usage time of the CPU, and the target application is added to the background application group.

Optionally, the processing module 403 is configured to control the second CPU usage time occupancy rate of the target application to be less than or equal to a second preset occupancy rate threshold when the target application switches from the foreground operation to the background operation, and the second CPU usage time occupancy rate is the ratio of the CPU usage time of the target application to the total CPU usage time.

Optionally, as shown in FIG. 5 , the device 400 further includes a trust determination module 404 .

The trust determination module 404 is configured to determine whether the target application is a preset trusted application.

The processing module 403 is configured to limit the time the target application uses the CPU when it is determined that the target application is not the trusted application when the target application switches from the foreground operation to the background operation.

Optionally, as shown in FIG6 , the device 400 further includes a restriction cancellation module 405 .

The restriction canceling module 405 is configured to cancel the restriction on the CPU usage time of the target application when the target application switches from the background operation to the foreground operation.

By adopting the above device, when an application enters the background, the use of the CPU by the background application is limited, thereby reducing the consumption of CPU power by the background application, and increasing the use of the CPU by the foreground application, thereby improving the operating performance of the foreground application.

Regarding the device in the above embodiment, the specific manner in which each module performs operations has been described in detail in the embodiment of the method, and will not be elaborated here.

The present disclosure also provides a computer-readable storage medium having computer program instructions stored thereon, which, when executed by a processor, implements the steps of the method for running an application provided by the present disclosure.

7 is a block diagram of an electronic device 700 running an application according to an exemplary embodiment. For example, the electronic device 700 may be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, etc.

7 , the electronic device 700 may include one or more of the following components: a processing component 702 , a memory 704 , a power component 706 , a multimedia component 708 , an audio component 710 , an input/output (I/O) interface 712 , a sensor component 714 , and a communication component 716 .

The processing component 702 generally controls the overall operation of the electronic device 700, such as operations associated with display, phone calls, data communications, camera operations, and recording operations. The processing component 702 may include one or more processors 720 to execute instructions to complete all or part of the steps of the method of running the application. In addition, the processing component 702 may include one or more modules to facilitate the interaction between the processing component 702 and other components. For example, the processing component 702 may include a multimedia module to facilitate the interaction between the multimedia component 708 and the processing component 702.

The memory 704 is configured to store various types of data to support operations on the electronic device 700. Examples of such data include instructions for any application or method operating on the electronic device 700, contact data, phone book data, messages, pictures, videos, etc. The memory 704 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk.

The power component 706 provides power to the various components of the electronic device 700. The power component 706 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to the electronic device 700.

The multimedia component 708 includes a screen that provides an output interface between the electronic device 700 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touch screen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touch, slide, and gestures on the touch panel. The touch sensor may not only sense the boundaries of the touch or slide action, but also detect the duration and pressure associated with the touch or slide operation. In some embodiments, the multimedia component 708 includes a front camera and/or a rear camera. When the electronic device 700 is in an operating mode, such as a shooting mode or a video mode, the front camera and/or the rear camera may receive external multimedia data. Each front camera and the rear camera may be a fixed optical lens system or have a focal length and optical zoom capability.

The audio component 710 is configured to output and/or input audio signals. For example, the audio component 710 includes a microphone (MIC), and when the electronic device 700 is in an operating mode, such as a call mode, a recording mode, and a voice recognition mode, the microphone is configured to receive an external audio signal. The received audio signal can be further stored in the memory 704 or sent via the communication component 716. In some embodiments, the audio component 710 also includes a speaker for outputting audio signals.

I/O interface 712 provides an interface between processing component 702 and peripheral interface modules, such as keyboards, click wheels, buttons, etc. These buttons may include but are not limited to: a home button, a volume button, a start button, and a lock button.

The sensor assembly 714 includes one or more sensors for providing various aspects of status assessment for the electronic device 700. For example, the sensor assembly 714 can detect the open/closed state of the electronic device 700, the relative positioning of the components, such as the display and keypad of the electronic device 700, and the sensor assembly 714 can also detect the position change of the electronic device 700 or a component of the electronic device 700, the presence or absence of user contact with the electronic device 700, the orientation or acceleration/deceleration of the electronic device 700, and the temperature change of the electronic device 700. The sensor assembly 714 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. The sensor assembly 714 may also include an optical sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, the sensor assembly 714 may also include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

The communication component 716 is configured to facilitate wired or wireless communication between the electronic device 700 and other devices. The electronic device 700 can access a wireless network based on a communication standard, such as WiFi, 2G or 3G, or a combination thereof. In an exemplary embodiment, the communication component 716 receives a broadcast signal or broadcast-related information from an external broadcast management system via a broadcast channel. In an exemplary embodiment, the communication component 716 also includes a near field communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on radio frequency identification (RFID) technology, infrared data association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology and other technologies.

In an exemplary embodiment, the electronic device 700 may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to execute a method for running an application.

In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory 704 including instructions, which can be executed by a processor 720 of an electronic device 700 to complete the method of running an application. For example, the non-transitory computer-readable storage medium can be a ROM, a random access memory (RAM), a CD-ROM, a magnetic tape, a floppy disk, an optical data storage device, etc.

Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the present disclosure. This application is intended to cover any variations, uses or adaptations of the present disclosure, which follow the general principles of the present disclosure and include common knowledge or customary technical means in the art that are not disclosed in the present disclosure. The specification and examples are to be regarded as exemplary only, and the true scope and spirit of the present disclosure are indicated by the following claims.

It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (10)

1. A method for running an application, comprising: Determine the target application running in the foreground; Monitoring whether the target application is switched from foreground operation to background operation; When the target application is switched from the foreground operation to the background operation, limiting the usage time of the central processing unit (CPU) by the target application to increase the usage time of the CPU by the foreground application; The limiting the CPU usage time of the target application program includes: Obtaining a preset background application group, wherein a first usage time occupancy rate of the CPU usage time of all application programs in the background application group is less than or equal to a first preset occupancy rate threshold; the first usage time occupancy rate is a ratio of the sum of the CPU usage time of each application program in the background application group to the total CPU usage time; The target application is added to the background application group. 2. The method according to claim 1, wherein limiting the CPU usage time of the target application comprises: The second usage time occupancy rate of the target application on the CPU is controlled to be less than or equal to a second preset occupancy rate threshold, where the second usage time occupancy rate is the ratio of the usage time of the target application on the CPU to the total usage time of the CPU. 3. The method according to claim 1, characterized in that before limiting the CPU usage time of the target application, the method further comprises: Determining whether the target application is a preset trusted application; The limiting the CPU usage time of the target application comprises: When it is determined that the target application is not the trusted application, the usage time of the CPU by the target application is limited. 4. The method according to any one of claims 1 to 3, characterized in that after limiting the CPU usage time of the target application, the method further comprises: When the target application is switched from the background operation to the foreground operation, the restriction on the use time of the CPU by the target application is cancelled. 5. A device for running an application, comprising: a target determination module, configured to determine a target application running in the foreground; A monitoring module is configured to monitor whether the target application is switched from foreground operation to background operation; A processing module is configured to limit the usage time of a central processing unit (CPU) of the target application when the target application switches from the foreground operation to the background operation, so as to increase the usage time of the CPU of the application running in the foreground; Wherein, the processing module is specifically configured as follows: When the target application is switched from the foreground operation to the background operation, a preset background application group is obtained, wherein a first usage time occupancy rate of the CPU usage time of all the applications in the background application group is less than or equal to a first preset occupancy rate threshold; and the first usage time occupancy rate is a ratio of the sum of the CPU usage time of each application in the background application group to the total CPU usage time; The target application is added to the background application group. 6. The device according to claim 5, characterized in that the processing module is configured to: When the target application is switched from the foreground operation to the background operation, a second usage time occupancy rate of the CPU by the target application is controlled to be less than or equal to a second preset occupancy rate threshold, and the second usage time occupancy rate is the ratio of the CPU usage time of the target application to the total CPU usage time. 7. The device according to claim 5, characterized in that the device further comprises: A trust determination module, configured to determine whether the target application is a preset trusted application; The processing module is configured to limit the use time of the CPU by the target application when it is determined that the target application is not the trusted application when the target application is switched from the foreground operation to the background operation. 8. The device according to any one of claims 5 to 7, characterized in that the device further comprises: The restriction canceling module is configured to cancel the restriction on the CPU usage time of the target application when the target application switches from the background operation to the foreground operation. 9. A computer-readable storage medium having computer program instructions stored thereon, wherein the program instructions implement the steps of the method according to any one of claims 1 to 4 when executed by a processor. 10. An electronic device, characterized by comprising the device according to any one of claims 5 to 8.