CN116204144A - Screen throwing method and device based on virtual screen of vehicle machine, vehicle machine equipment and vehicle - Google Patents

Abstract

The embodiment of the present invention discloses a screen projection method, device, vehicle equipment and vehicle based on the virtual screen of the vehicle. The command carries the projection data of the unadapted application. When the unadapted application is an application that does not support full-screen adaptive display, the target virtual screen is created according to the expected screen parameters of the car virtual screen and the application group to which the unadapted application belongs. Display the projected screen data on the target virtual screen; without intruding into the unadapted application, a virtual screen can be created in combination with the expected screen parameters to ensure that the unadapted application can be displayed normally on the car screen with different resolutions, and the unadapted application can be improved. The integrity and usability of the display of the adapted application enables the non-adapted application to obtain almost the same visual experience and interactive experience on all vehicles.

Description

Screen projection method, device, vehicle-machine equipment and vehicle based on vehicle-machine virtual screen

technical field

The present application relates to the technical field of vehicle-machine interconnection, and in particular to a screen projection method, device, vehicle-machine equipment and vehicle based on a vehicle-machine virtual screen.

Background technique

With the development of car-machine interconnection technology, users' demand for travel products is no longer limited to calls, navigation, and music, and users' demand for entertainment, leisure, work and other applications is also increasing. However, some third-party applications on mobile phones have difficulties in cooperation and access to the car-machine system. In order to improve the core competitiveness and user experience of the travel products of various companies, some travel products provide the function of supporting unadapted applications to run on the car-machine mirroring screen, and the more common technology is to directly start the full-screen on the car-machine virtual screen Unadapted apps on the phone.

However, in practical applications, it is found that due to the large number of car companies on the market, the screen sizes of various models are different, and the resolution/screen pixel density is different, and the unadapted application itself may not support self-adaptation or support self-adaptation Limited, resulting in different performances of non-adapted applications on the virtual screen of the car with different resolutions. Some interfaces may have abnormalities, such as overlapping, disordered, and overflowing interface elements, poor function usability, and poor screen projection effects, which directly affect the user experience.

Contents of the invention

The embodiment of the present application discloses a screen projection method, device, vehicle equipment, and vehicle based on the virtual screen of the vehicle, which can realize the complete projection of the unadapted application on the vehicle with different screen resolutions, ensure the projection effect, and improve the user experience.

The first aspect of the embodiment of the present application discloses a screen projection method based on a car-machine virtual screen, which may include:

After the in-vehicle device is connected to the terminal device, a screen projection instruction of the terminal device is received, and the screen projection instruction carries screen projection data of an unadapted application;

When the unadapted application is an application that does not support full-screen adaptive display, create a target virtual screen according to the car-machine virtual screen and the expected screen parameters of the application group to which the unadapted application belongs;

The screen projection data is displayed on the target virtual screen.

As an optional implementation manner, in the first aspect of the embodiment of this application, when the unadapted application is an application that does not support full-screen adaptive display, and the Before configuring the expected screen parameters of the application group to which the application belongs, before creating the target virtual screen, the method further includes:

judging whether the target virtual screen has been created;

If not, execute the step of creating a target virtual screen according to the car-machine virtual screen and the expected screen parameters of the application group to which the unadapted application belongs.

As an optional implementation manner, in the first aspect of the embodiment of the present application, the method further includes:

If the target virtual screen has already been created, multiplexing the target virtual screen to display the projection data on the target virtual screen.

As an optional implementation manner, in the first aspect of the embodiment of the present application, the creation of the target virtual screen according to the car-machine virtual screen and the expected screen parameters of the application group to which the unadapted application belongs includes:

Acquire expected screen parameters of the application group to which the unadapted application belongs, where the expected screen parameters at least include expected screen width, expected screen height, and expected screen pixel density;

creating a target virtual screen according to the expected screen parameters;

placing the target virtual screen in a display container of the same size;

calculating the scaling factor of the display container according to the screen resolution of the car-machine virtual screen;

scaling the display container according to the scaling factor;

moving the scaled display container to completely display the target virtual screen on the car-machine virtual screen;

Injecting the touch event of the vehicle-machine virtual screen into the target virtual screen.

As an optional implementation manner, in the first aspect of the embodiments of the present application, the calculating the scaling factor of the display container according to the screen resolution of the car-machine virtual screen includes:

Acquiring actual screen parameters of the car-machine virtual screen, where the actual screen parameters at least include actual screen width and actual screen height;

According to the actual screen parameters, calculate the aspect ratio of the actual application area of the car-machine virtual screen;

Calculate an expected screen resolution aspect ratio according to the expected screen parameters;

Calculate the scaling factor of the display container according to the actual screen parameters, the expected screen parameters, the actual application area aspect ratio and the expected screen resolution aspect ratio.

As an optional implementation manner, in the first aspect of the embodiment of the present application, the moving the scaled display container to completely display the target virtual screen on the vehicle-machine virtual screen includes:

calculating a horizontal translation amount and a vertical translation amount according to the expected screen parameters and the scaling factor;

According to the horizontal translation amount and the vertical translation amount, the zoomed display container is moved to the center of the vehicle-machine virtual screen, so as to completely display the target virtual screen on the vehicle-machine virtual screen.

As an optional implementation manner, in the first aspect of the embodiment of the present application, injecting the touch event of the vehicle-machine virtual screen into the target virtual screen includes:

monitoring the touch event of the virtual screen of the vehicle;

Obtain the touch event coordinates of the car-machine virtual screen;

performing scaling processing on the coordinates of the touch event according to the scaling factor;

Inject the processed touch event coordinates into the target virtual screen.

As an optional implementation manner, in the first aspect of the embodiment of the present application, the method further includes:

When the unadapted application is an application that supports full-screen adaptive display, the projected screen data is directly displayed on the car-machine virtual screen.

The second aspect of the embodiment of the present application discloses a screen projection device based on a car-machine virtual screen, which may include:

The receiving module is configured to receive a screen projection instruction of the terminal equipment after the vehicle-machine equipment is connected to the terminal equipment, and the screen projection instruction carries screen projection data of unadapted applications;

A creation module, configured to create a target virtual screen according to the car-machine virtual screen and the expected screen parameters of the application group to which the unadapted application belongs when the unadapted application is an application that does not support full-screen adaptive display;

A starting module, configured to display the screen projection data on the target virtual screen.

As an optional implementation manner, in the second aspect of the embodiment of the present application, the device further includes:

A judging module, configured to create a target according to the car-machine virtual screen and the expected screen parameters of the application group to which the unadapted application belongs when the unadapted application is an application that does not support full-screen adaptive display Before the virtual screen, determine whether the target virtual screen has been created;

The creating module is specifically configured to create a target virtual screen according to the car-machine virtual screen and the expected screen parameters of the application group to which the unadapted application belongs when the judgment result of the judging module is negative.

As an optional implementation manner, in the second aspect of the embodiments of the present application, the startup module is further configured to reuse the A target virtual screen, for displaying the screen projection data on the target virtual screen.

As an optional implementation, in the second aspect of the embodiment of the present application, the creation module is used to create the target virtual screen according to the vehicle-machine virtual screen and the expected screen parameters of the application group to which the unadapted application belongs. The specific method is:

Obtain expected screen parameters of the application group to which the unadapted application belongs, where the expected screen parameters at least include expected screen width, expected screen height, and expected screen pixel density; and, create a target virtual screen according to the expected screen parameters; and, placing the target virtual screen in a display container of the same size; and calculating a scaling factor of the display container according to the screen resolution of the vehicle-machine virtual screen; and scaling the display container according to the scaling factor; And, moving the scaled display container to completely display the target virtual screen on the car-machine virtual screen; and injecting a touch event of the car-machine virtual screen into the target virtual screen.

As an optional implementation manner, in the second aspect of the embodiment of the present application, the manner in which the creation module is used to calculate the scaling factor of the display container according to the screen resolution of the car machine is as follows:

Obtain the actual screen parameters of the car-machine virtual screen, the actual screen parameters at least include the actual screen width and the actual screen height; according to the actual screen parameters, calculate the actual application area aspect ratio of the car-machine virtual screen; Calculate the expected screen resolution aspect ratio of the expected screen parameters; calculate the expected screen resolution aspect ratio according to the actual screen parameters, the expected screen parameters, the actual application area aspect ratio and the expected screen resolution aspect ratio Displays the scaling factor of the container.

As an optional implementation manner, in the second aspect of the embodiment of the present application, the manner in which the creation module is used to move the scaled display container to completely display the target virtual screen on the vehicle-machine virtual screen is as follows: :

Calculate the horizontal translation amount and the vertical translation amount according to the expected screen parameters and the zoom factor; and move the zoomed display container to the car-machine virtual screen according to the horizontal translation amount and the vertical translation amount center position, so as to completely display the target virtual screen on the car-machine virtual screen.

As an optional implementation manner, in the second aspect of the embodiment of the present application, the method for the creation module to inject the touch event of the car-machine virtual screen into the target virtual screen is specifically:

Listening to the touch event of the car-machine virtual screen; and acquiring the touch event coordinates of the car-machine virtual screen; and scaling the touch event coordinates according to the scaling factor; and processing the processed touch event Coordinates are injected into the target virtual screen.

The third aspect of the embodiment of the present application discloses a vehicle-machine equipment, which may include:

a memory storing executable program code;

a processor coupled to the memory;

The processor invokes the executable program code stored in the memory to execute a screen projection method based on a vehicle-machine virtual screen disclosed in the first aspect of the embodiments of the present invention.

The fourth aspect of the embodiment of the present application discloses a vehicle, which may include:

The vehicle-machine equipment disclosed in the third aspect of the embodiment of the present application.

The fifth aspect of the embodiment of the present application discloses a computer-readable storage medium, which stores a computer program, wherein the computer program causes the computer to execute the screen projection method based on the car-machine virtual screen disclosed in the first aspect of the embodiment of the present invention .

The sixth aspect of the embodiments of the present application discloses a computer program product, which, when running on a computer, causes the computer to execute part or all of the steps of any method of the first aspect.

The seventh aspect of the embodiments of the present application discloses an application release platform, the application release platform is used to release computer program products, wherein, when the computer program products run on a computer, the computer executes any Some or all steps of a method.

Compared with the prior art, the embodiment of the present application has the following beneficial effects:

In this embodiment of the application, after the vehicle-machine device is connected to the terminal device, the screen projection command of the terminal device is received. The screen projection command carries the screen projection data of the unadapted application, and the unadapted application does not support full-screen adaptive When displaying an application, create a target virtual screen according to the car-machine virtual screen and the expected screen parameters of the application group to which the unadapted application belongs, and then display the projection data of the unadapted application on the target virtual screen; by implementing the embodiment of the present application , can create a virtual screen based on expected screen parameters without intruding into unadapted applications, ensuring that unadapted applications can be displayed normally on car screens with different resolutions, and improving the integrity and usability of unadapted application displays , so that unadapted applications can obtain almost the same visual experience and interactive experience on all vehicles.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the accompanying drawings that need to be used in the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For Those of ordinary skill in the art can also obtain other drawings based on these drawings without making creative efforts.

FIG. 1 is a schematic diagram of an application scenario of a screen projection method based on a car-machine virtual screen disclosed in an embodiment of the present application;

FIG. 2 is a schematic flow diagram of a screen projection method based on a car-machine virtual screen disclosed in Embodiment 1 of the present application;

FIG. 3 is a schematic flow diagram of the screen projection method based on the car-machine virtual screen disclosed in Embodiment 2 of the present application;

FIG. 4 is a schematic flow diagram of the screen projection method based on the car-machine virtual screen disclosed in Embodiment 3 of the present application;

Fig. 5 is a schematic diagram of the car-machine virtual screen disclosed in the embodiment of the present application;

FIG. 6 is a schematic diagram of a target virtual screen disclosed in Embodiment 1 of the present application;

FIG. 7 is a schematic diagram of zooming the target virtual screen disclosed in Embodiment 2 of the present application;

FIG. 8 is a schematic diagram of the target virtual screen disclosed in Embodiment 3 of the present application;

FIG. 9 is a schematic structural diagram of a screen projection device based on a car-machine virtual screen disclosed in Embodiment 1 of the present application;

FIG. 10 is a schematic structural diagram of a screen projection device based on a car-machine virtual screen disclosed in Embodiment 2 of the present application;

Fig. 11 is a schematic structural diagram of the vehicle-machine equipment disclosed in the embodiment of the present application;

Fig. 12 is a schematic structural diagram of a vehicle disclosed in an embodiment of the present application.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the application with reference to the drawings in the embodiments of the application. Apparently, the described embodiments are only some, not all, embodiments of the application. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

It should be noted that the terms "first", "second", "third" and "fourth" in the specification and claims of this application are used to distinguish different objects, rather than to describe specific order. The terms "comprising" and "having" and any variations thereof in the embodiments of the present application are intended to cover a non-exclusive inclusion, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to expressly instead of those steps or elements listed, may include other steps or elements not explicitly listed or inherent to the process, method, product or apparatus.

The terminal device involved in this embodiment of the present application may be an electronic device such as a smart phone, a wearable device (smart bracelet, smart watch, etc.), a tablet computer, or the like.

Among them, the unadapted application involved in the embodiment of this application refers to the third-party application on the terminal device that has not been connected to the car-machine device, that is, the third-party application manufacturer and the car company of the car-machine device have not agreed on the third-party application in advance. Docking is carried out to carry out special processing for third-party applications according to the vehicle company's plan or requirements, so that third-party applications can be adaptively displayed on the virtual screen of the vehicle equipment. Therefore, in the embodiment of the present application, unadapted applications are divided into three types of application groups: applications that support adaptive full-screen display, applications that only support horizontal-screen display, and applications that only support vertical-screen display. Among them, applications that only support horizontal screen display and applications that only support vertical screen display are collectively referred to as applications that do not support adaptive full-screen display. For applications that only support horizontal screen display, they can be directly adaptively displayed in full screen on the virtual screen of the vehicle. For applications that only support horizontal screen display, in the embodiment of this application, it is necessary to use the characteristics of the application group to which the unadapted application belongs, that is, Only support the feature of horizontal screen, pre-set the corresponding expected screen parameters, and combine the car virtual screen to create a target virtual screen suitable for display, and display the application on the target virtual screen; for applications that only support vertical screen display , in the embodiment of this application, it is necessary to pre-set the corresponding expected screen parameters according to the characteristics of the application group to which the unadapted application belongs, that is, only support the vertical screen, and create a display suitable for the car-machine virtual screen. The target virtual screen displays the application on the target virtual screen. Among them, the expected screen parameters corresponding to the application group of the application that only supports horizontal screen display are different from the expected screen parameters corresponding to the application group of the application that only supports vertical screen display. .

Further, please refer to Fig. 1, which is a schematic diagram of the application scene of the screen projection method based on the car-machine virtual screen disclosed in the embodiment of the present application; as shown in Fig. WIFI, Bluetooth, etc., so as to establish a communication link between the car equipment and the smart phone. Based on the connection between the in-vehicle device and the smartphone, the smartphone can further expand the capability of the infotainment head unit (IHU) of the in-vehicle device, by projecting the application screen of the smartphone to the virtual screen of the in-vehicle device. Display, so that not only navigation, radio, audio, video, etc. can be played on the car equipment, but also online work, access to work meetings, etc. can be realized.

Furthermore, the virtual screen sizes and resolutions/screen pixel densities of different car companies are different. Among them, for non-adapted applications that support adaptive full-screen display, the projected screen data can be directly displayed on the virtual screen of the car device. For applications that only support horizontal screen display and applications that only support vertical screen display, you can view both The operation is an application that does not support full-screen adaptive display. After receiving the screen projection command from the smartphone, create a target virtual screen based on the virtual screen of the car and the expected screen of the application group to which the unadapted application belongs, and then create a target virtual screen on the target virtual screen. Display the screen projection data of the unadapted application, so that the target virtual screen can be created based on the preset expected screen parameters without intruding the unadapted application, so that the unadapted application can be displayed in different resolutions It can be displayed normally on the car-machine screen, improving the integrity and usability of unadapted application display, so that unadapted applications can obtain almost the same visual experience and interactive experience on all car-machine devices.

In combination with the above introduction, the embodiment of the present application discloses a screen projection method, device, vehicle equipment and storage medium based on the vehicle-machine virtual screen, which can realize the complete projection of unadapted applications on the vehicle-machine virtual screen with different screen resolutions. screen to ensure the effect of screen projection and improve user experience.

The technical solution of the present application will be described in detail below through specific embodiments.

Please refer to FIG. 2. FIG. 2 is a schematic flow chart of the screen projection method based on the car-machine virtual screen disclosed in Embodiment 1 of the present application; as shown in FIG. 2, the screen projection method based on the car-machine virtual screen may include:

201. After the in-vehicle device is connected to the terminal device, receive a screen projection command from the terminal device, and the screen projection command carries screen projection data of an unadapted application.

Wherein, the executor of the embodiment of the present application may be a screen projection device based on a car-machine virtual screen or a car-machine device, wherein the screen projection device based on a car-machine virtual screen may be independent of the car-machine device, or may be built in the car-machine modules in machine equipment.

The terminal device can receive the connection request of the vehicle-machine device, and establish a communication link with the vehicle-machine device according to the connection request. The in-vehicle device can also receive the connection request from the terminal device, and establish a communication link with the terminal device according to the connection request. For example, the terminal device receives the connection request sent by the car-machine device through Bluetooth or WIFI, or sends a connection request to the car-machine device through Bluetooth, WIFI or QR code scanning. Therefore, when it is necessary to establish a communication link between the terminal device and the vehicle-machine device, a connection request can be sent to the terminal device through the vehicle-machine device, or a connection request can be sent to the vehicle-machine device through the terminal device, so that the vehicle-machine device can be connected quickly. Establish a communication link with the terminal device.

After the car-machine device and the terminal device establish a communication link, the car-machine device will create a car-machine virtual screen. Afterwards, if it receives a screen projection command from the terminal device, it will project the unadapted application indicated by the screen projection command to the screen. Display on the car virtual screen.

Combined with the above introduction, unadapted applications are divided into three types of application groups: applications that support adaptive full-screen display, applications that only support horizontal screen display, and applications that only support vertical screen display. For applications that only support horizontal screen display and applications that only support vertical screen display, the corresponding expected screen parameters are preset and saved in the local memory or in the connected cloud server. Due to the characteristics of horizontal screen display and vertical screen display , the expected screen parameters of the respective presets of the two application groups are different.

202. When the unadapted application is an application that does not support full-screen adaptive display, create a target virtual screen according to the car-machine virtual screen and the expected screen parameters of the application group to which the unadapted application belongs.

In the embodiment of the present application, after receiving the screen projection command, the unadapted applications in the screen projection command are classified into the application groups to which they belong. For the application groups that only support horizontal screen display and vertical screen display Unadapted applications cannot be adaptively displayed on the virtual screen of the vehicle. In the embodiment of this application, according to the application group to which the unadapted application belongs, the matching preset expected screen parameters are obtained. According to the expected screen parameters and the vehicle machine virtual screen to create a target virtual screen.

It should be noted that after the communication link is established between the in-vehicle device and the terminal device, until the communication link is disconnected, the target virtual screen only needs to be created once for the application group that only supports horizontal screen display. The application group displayed on the vertical screen only needs to create the target virtual screen once. That is to say, a life cycle of the target virtual screen starts from the establishment of the target virtual screen and ends when the communication link between the in-vehicle device and the terminal device is disconnected.

Optionally, distinguishing the application groups to which the unadapted applications in the screen casting instruction belong can be achieved through the following steps:

Input unadapted applications into the classification model, which is obtained after mathematical modeling based on a large number of unadapted application samples that support adaptive full-screen display, only support horizontal screen display, and only support vertical screen display. ;

The output result of the classification model is obtained, and the output result indicates the application group to which the unadapted application belongs.

Through the above implementation manner, it is possible to quickly identify which application group an unadapted application belongs to, so as to improve screen projection efficiency.

Furthermore, the unadapted applications used in each screen projection will be saved as samples that are regularly optimized by the classification model. When the unadapted application samples reach a certain number, the classification model will be optimized to improve the classification model's ability to identify unsuitable apps. Match the accuracy of the application.

203. Display the projection data on the target virtual screen.

It should be noted that the target virtual screen is overlaid and displayed on the car-machine virtual screen, that is, the target virtual screen is overlaid and loaded on the car-machine virtual screen, so that the target virtual screen can be displayed on the car-machine virtual screen in full screen. Specifically, for applications that only support horizontal screen display, the width of the target virtual screen is the same as that of the car-machine virtual screen, and the height of the target virtual screen is usually smaller than the height of the car-machine virtual screen. For applications that only support vertical screen display, The height of the target virtual screen is consistent with the height of the car-machine virtual screen, and the width of the target virtual screen is usually smaller than the width of the car-machine virtual screen.

Implement the above embodiment, after the vehicle-machine device is connected to the terminal device, receive the screen projection command of the terminal device, the screen projection command carries the screen projection data of the unadapted application, and the unadapted application does not support full-screen adaptive display When applying, create a target virtual screen according to the car-machine virtual screen and the expected screen parameters of the application group to which the unadapted application belongs, and then display the projected screen data of the unadapted application on the target virtual screen; by implementing the embodiments of the present application, it is possible On the premise of not intruding into unadapted applications, create a virtual screen based on expected screen parameters to ensure that unadapted applications can be displayed normally on different resolution car screens, improve the integrity and usability of unadapted application displays, and make Unadapted apps can obtain almost the same visual experience and interactive experience on all vehicles.

Please refer to FIG. 3. FIG. 3 is a schematic flowchart of the screen projection method based on the car-machine virtual screen disclosed in Embodiment 2 of the present application; as shown in FIG. 3, the screen projection method based on the car-machine virtual screen may include:

301. After the in-vehicle device is connected to the terminal device, receive a screen projection command from the terminal device, and the screen projection command carries screen projection data of an unadapted application.

Wherein, the executor of the embodiment of the present application may be a screen projection device based on a car-machine virtual screen or a car-machine device, wherein the screen projection device based on a car-machine virtual screen may be independent of the car-machine device, or may be built in the car-machine modules in machine equipment.

It should be noted that the screen projection data is page data not adapted to the application.

302. When the unadapted application is an application that does not support full-screen adaptive display, judge whether a target virtual screen has been created; wherein, if the judgment result is yes, turn to steps 303-304, and if the judgment result is no, turn to Step 305.

In step 302, for the unadapted application indicated by the screen-casting instruction, it is first judged whether a target virtual application matching the application group to which the unadapted application belongs has been created after the communication link between the in-vehicle device and the terminal device is established. screen, if it has been created, go to step 304, if it has not been created, go to steps 303-304. When the unadapted application is a full-screen adaptive display application, step 306 is performed.

303. Create a target virtual screen according to the car-machine virtual screen and the expected screen parameters of the application group to which the unadapted application belongs.

In this embodiment of the application, the application group to which the unadapted application belongs is determined, and then the matching expected screen parameters can be found from the expected screen parameters stored in the local memory, and based on the expected screen parameters and the screen resolution of the car-machine virtual screen, create Target virtual screen.

304. Display the projection data on the target virtual screen.

Among them, the target virtual screen can be superimposed and completely displayed on the virtual screen of the car machine, so that the projection data can be displayed on the target virtual screen, and the application that only supports horizontal screen display or only the horizontal screen can be displayed on the virtual screen of the car machine. Apps displayed vertically. For example, for applications that only support horizontal screen display, after displaying the projected screen data on the target virtual screen, the overall visual effect can be realized to display unadapted applications on the car virtual screen in horizontal screen. For applications that only support vertical screen display For the application, after displaying the projection data on the target virtual screen, the unadapted application can be displayed vertically on the car virtual screen in terms of the overall visual effect.

It can be seen that, in combination with steps 303-304, for unadapted applications, a set of pre-set expected screen parameters can be used, and then the screen can be displayed on the virtual screen of the car with different screen resolutions, and can be completely displayed , the stability is good, and the overall visual experience is also strong, which can also reduce the difficulty of connecting in-vehicle equipment to unadapted applications.

In step 302, if the target virtual screen has already been created, the target virtual screen is superimposed and loaded and displayed in the middle of the virtual screen of the car, and then the projection data is displayed on the target virtual screen to realize the current projection of unadapted applications. Screen.

In the above embodiment, after the current communication link is established between the in-vehicle device and the terminal device, if the target virtual screen of the application group to which it belongs has already been created, there is no need to re-create it, and the previously created target virtual screen can be called directly, and then It is enough to directly display the screen projection data, which can simplify the screen projection operation and ensure the screen projection effect.

305. When the unadapted application is an application that supports full-screen adaptive display, directly display the projection data on the virtual screen of the car.

Among them, when the unadapted application is an application that supports full-screen adaptive display, the projected screen data can be displayed in full screen directly on the virtual screen of the car, without additionally creating a target virtual screen.

Optionally, for applications that support full-screen adaptive display, when encountering extreme screen resolutions, they may not be able to display stably on the car virtual screen with extreme screen resolutions. In this case, you can also set the Expected screen parameters, according to the expected screen parameters and the screen resolution of the car virtual screen, create a new virtual screen, and then project the screen on the created virtual screen to improve the stability and feasibility of the application screen projection, and improve the projection screen effect.

Implement the above embodiment, after the vehicle-machine device is connected to the terminal device, receive the screen projection command of the terminal device, the screen projection command carries the screen projection data of the unadapted application, and the unadapted application does not support full-screen adaptive display When applying, you can first judge whether there is a target virtual screen. If so, directly reuse the target virtual screen to display the projection data. If not, according to the screen resolution of the car virtual screen and the expected screen parameters of the application group to which the unadapted application belongs , create a target virtual screen, and then display the projected screen data of the unadapted application on the target virtual screen; by implementing the embodiment of the present application, it is possible to use the preset expected screen parameters to create a It is suitable for the target virtual screen of the projected screen, ensuring that unadapted applications can be displayed normally on car screens with different resolutions, improving the integrity and usability of unadapted application display, so that unadapted applications can be obtained on all car screens Almost the same visual experience and interactive experience. In addition, when the unadapted application is an application that supports full-screen adaptive display, it can be directly displayed on the virtual screen of the car, and the unadapted application can be adaptively displayed in full screen on the virtual screen of the car without additional intervention .

Please refer to FIG. 4. FIG. 4 is a schematic flowchart of the screen projection method based on the car-machine virtual screen disclosed in Embodiment 3 of the present application; as shown in FIG. 4, the screen projection method based on the car-machine virtual screen may include:

401. After the in-vehicle device is connected to the terminal device, receive a screen projection command from the terminal device, and the screen projection command carries screen projection data of an unadapted application.

Wherein, the executor of the embodiment of the present application may be a screen projection device based on a car-machine virtual screen or a car-machine device, wherein the screen projection device based on a car-machine virtual screen may be independent of the car-machine device, or may be built in the car-machine modules in machine equipment.

402. When the unadapted application is an application that does not support full-screen adaptive display, acquire expected screen parameters of the application group to which the unadapted application belongs, where the expected screen parameters at least include expected screen width, expected screen height, and expected screen pixel density.

In step 401, when the terminal device sends a screen projection command and tries to start an unadapted application on the car virtual screen, it can determine whether the unadapted application supports full-screen adaptive display, and if so, execute step 410. Conversely, when the unadapted application is an application that does not support full-screen adaptive display, it is determined that the application group to which the unadapted application belongs may be an application group that only supports horizontal screen display, or an application group that only supports vertical screen display. The expected screen parameters of different application groups are different. Therefore, in the embodiment of this application, according to the characteristics that the unadapted applications of different application groups only support horizontal screen or only support vertical screen, the corresponding group of unadapted applications will be obtained. Expected screen parameters, the expected screen parameters at least include expected screen width, expected screen height and expected screen pixel density.

Optionally, the above-mentioned expected screen parameters can also be optimized and updated after several times of screen projection, so as to obtain more accurate expected screen parameters and improve the screen projection effect of unadapted applications on the virtual screen of the car.

403. Create a target virtual screen according to expected screen parameters.

Among them, the target virtual screen is created according to the determined expected screen parameters, the width of the target virtual screen is the expected screen width in the expected screen parameters, and the height of the target virtual screen is the expected screen height in the expected screen parameters, creating a screen that satisfies the expected screen The pixel density of the target virtual screen.

404. Place the target virtual screens in display containers with the same size.

Optionally, the size of the display container is the same as that of the target virtual screen, that is, the width of the display container is also the aforementioned expected screen width, and the height of the display container is also the aforementioned expected screen height. Optionally, select a TextureView that can control the display size as the display container.

Since the target virtual screen is placed in the display container, the purpose of controlling the display size of the target virtual screen can be achieved by controlling the display size of the display container, that is, the purpose of controlling the height and width of the target virtual screen can be achieved.

405. Calculate the scaling factor of the display container according to the screen resolution of the car-machine virtual screen.

Optionally, step 405 may include:

Obtain the actual screen parameters of the car virtual screen, the actual screen parameters at least include the actual screen width and the actual screen height;

According to the actual screen parameters, calculate the aspect ratio of the actual application area of the car virtual screen;

According to the expected screen parameters, calculate the expected screen resolution aspect ratio;

Calculate the zoom factor of the display container according to the actual screen parameters, expected screen parameters, actual application area aspect ratio, and expected screen resolution aspect ratio.

Wherein, after the communication link is established between the car-machine device and the terminal device, the car-machine device creates a car-machine virtual screen. In this embodiment, the actual screen parameters of the car-machine virtual screen are obtained, and according to the actual The screen parameter calculates the scaling factor for the display container.

Among them, the calculation method of the scaling factor is as follows:

Assuming that the actual screen width of the car virtual screen is expressed as REAL_DISPLAY_WIDTH, and the actual screen height is expressed as REAL_DISPLAY_HEIGHT, then the actual application area aspect ratio of the car virtual screen is expressed as realRatio, where realRatio is calculated by formula (1), as follows:

realRatio=REAL_DISPLAY_WIDTH/REAL_DISPLAY_HEIGHT*1f

Wherein, f=float, which represents a floating point number, and the calculated realRatio is converted into a floating point number.

Assume that the expected screen height is expressed as EXPECTED_DISPLAY_HEIGHT, the expected screen width is expressed as EPECTED_DISPLAY_WIDTH, and the expected screen resolution aspect ratio is expressed as expectedRatio, where expectedRatio is calculated using the calculation formula (2), as follows:

expectedRatio=EPECTED_DISPLAY_WIDTH/EXPECTED_DISPLAY_HE IGHT*1f

Similarly, the above f is also an abbreviation of float, which means a floating point number, and the calculated expectedRatio is converted into a floating point number.

Further, if realRatio is greater than expectedRatio, assuming that the scaling factor is expressed as scale, then scale is calculated using formula (3), as follows:

scale=REAL_DISPLAY_HEIGHT*1f/EXPECTED_DISPLAY_HEIGHT

Conversely, if realRatio is less than or equal to expectedRatio, then scale is calculated using formula (4), as follows:

Scale=REAL_DISPLAY_WIDTH*1f/expectedRatio/EXPECTED_DISPLAY_HEIGHT

It can be seen that, through the above-mentioned implementation, the zoom factor that can accurately zoom the display container can be calculated in combination with the actual screen parameters of the car-machine virtual screen, so that the display container can be superimposed on the car-machine virtual screen in a horizontal or vertical screen, and finally realized in the car. The horizontal screen or vertical screen on the machine virtual screen displays the purpose of unadapted applications.

406. Scale the display container according to the scaling factor.

Wherein, since the display size of the display container can be controlled, in step 406, the display container is scaled according to the scaling factor. Because the scaling display container achieves the purpose of scaling the target virtual screen at the same time, the target virtual screen is scaled to match the car-machine virtual screen.

407. Move the scaled display container to completely display the target virtual screen on the car-machine virtual screen.

Optionally, moving the zoomed display container to completely display the target virtual screen on the car-machine virtual screen includes:

Calculate the horizontal translation and vertical translation according to the expected screen parameters and zoom factor;

According to the horizontal translation amount and the vertical translation amount, move the scaled display container to the center of the car-machine virtual screen, so as to fully display the target virtual screen on the car-machine virtual screen.

In the above embodiments, the target virtual screen is obtained by zooming the display container, and the target virtual screen is moved to the center of the car-machine virtual screen to realize the horizontal or vertical screen display of the target virtual screen on the car-machine virtual screen.

Wherein, the calculation formula (5) of the above-mentioned lateral translation amount is as follows:

(EXPECTED_DISPLAY_WIDTH-EXPECTED_DISPLAY_WIDTH*scale)/2

The calculation formula (6) of the above-mentioned longitudinal translation amount is as follows:

(EXPECTED_DISPLAY_HEIGHT-EXPECTED_DISPLAY_HEIGHT*scale)/2;

After calculating the above-mentioned horizontal translation amount and vertical translation amount, the display container can be moved according to the horizontal translation amount first, and then the display container can be moved according to the vertical translation amount, so as to move the display container to the center position of the virtual screen of the car; or, you can First move the display container according to the vertical translation amount, and then move the display container according to the horizontal translation amount, so as to move the display container to the center of the car-machine virtual screen.

408. Inject the touch event of the car-machine virtual screen into the target virtual screen.

In the embodiment of this application, the projection data is finally displayed on the target virtual screen, and the user can interact with unadapted applications on the target virtual screen. The touch event of the machine virtual screen is injected into the target virtual screen.

Optionally, injecting the touch event of the car-machine virtual screen into the target virtual screen includes:

Monitor touch events on the virtual screen of the car;

Obtain the touch event coordinates of the car virtual screen;

Scale the coordinates of the touch event according to the scaling factor;

Inject the processed touch event coordinates into the target virtual screen.

Among them, the touch event is realized through the code, and the touch event is monitored, and then the touch event coordinate corresponding to the touch event is obtained, and the touch event coordinate is scaled according to the scaling factor, and then the touch event coordinate is injected into the target virtual screen.

409. Display the projection data on the target virtual screen.

The screen projection data of the unadapted application is displayed on the created target virtual screen. Since the target virtual screen has injected the touch event of the car-machine virtual screen, the user can operate the application based on the target virtual screen, and finally realize the in-car virtual screen. Operate the application on the screen.

410. When the unadapted application is an application that supports full-screen adaptive display, directly display the projection data on the virtual screen of the car.

Implementing the above embodiments can ensure that most pages of unadapted applications are displayed normally without intruding into unadapted applications, and ensure that each unadapted application has nearly the same visual and interactive experience, greatly improving the interface display integrity and usability of non-adapted applications; at the same time, through the above-mentioned embodiments, it can display) to customize different adaptation rules, so that unadapted applications can obtain a better interactive experience as much as possible while displaying normally.

Furthermore, it only needs to use a set of fixed expected screen parameters to create a new target virtual screen and combine the scalable characteristics of the TextureView display container, so that unadapted applications can display pages normally on different resolutions of car equipment and each The page display effect is basically the same. The embodiment of the present application not only optimizes the interactive experience of unadapted applications, but also reduces the difficulty of accessing unadapted applications.

Please refer to Fig. 5 to Fig. 8, wherein Fig. 5 is a schematic diagram of the car-machine virtual screen disclosed in the embodiment of the present application, Fig. 6 is a schematic diagram of the target virtual screen disclosed in the first embodiment of the present application, and Fig. 7 is the schematic diagram of the embodiment of the present application The schematic diagram of the zoomed target virtual screen disclosed in the second disclosure, and FIG. 8 is a schematic diagram of the target virtual screen disclosed in the third embodiment of the present application. In Figures 5-8, an unadapted application that only supports vertical screen display is taken as an example. The resolution of the in-vehicle device is 1280x720, the column where the icon on the left is located is the Dock column, and the width and height of the application display area are 1160x720, as shown in the figure 5.

Further, the preset expected screen parameters that only support vertical screen display are EXPECTED_DISPLAY_WIDTH=1280, EXPECTED_DISPLAY_HEIGHT=1600, EXPECTED_DISPLAY_DENSITY_DPI=360, and create a target virtual screen according to the expected screen parameters, and the width and height of the newly created target virtual screen are larger than that of the vehicle The car-machine virtual screen of the device, as shown in Figure 6, covers the lighter-colored area on it as the target virtual screen, which is the TextureView display container.

Further, according to the calculation formula given in the embodiment shown in accompanying drawing 4, the calculated scaling factor is 0.45, and then the TextureView display container is scaled according to the scaling factor, and the scaled TextureView display container is located at the upper left of the screen (gray area), which is the target virtual screen, and the black area is the car virtual screen, as shown in Figure 7.

Further, move the target virtual screen to the center of the car-machine virtual screen, and then inject the touch event coordinates of the car-machine virtual screen, as shown in Figure 8, and then display the projected screen of the unadapted application on the target virtual screen data.

Please refer to FIG. 9. FIG. 9 is a schematic structural diagram of a screen projection device based on a car-machine virtual screen disclosed in Embodiment 1 of the present application; as shown in FIG. 9, the screen projection device based on a car-machine virtual screen may include:

The receiving module 901 is configured to receive a screen projection command from the terminal device after the vehicle-machine device is connected to the terminal device, and the screen projection command carries screen projection data of unadapted applications;

The creation module 902 is used to create a target virtual screen according to the car-machine virtual screen and the expected screen parameters of the application group to which the unadapted application belongs when the unadapted application is an application that does not support full-screen adaptive display;

The starting module 903 is configured to display screen projection data on the target virtual screen.

It can be seen that, after implementing the above-mentioned device, after the vehicle-machine equipment is connected to the terminal device, the screen projection command of the terminal device is received. The screen projection command carries the screen projection data of the unadapted application, and the unadapted application does not support full-screen adaptive display. When using an application, create a target virtual screen according to the car-machine virtual screen and the expected screen parameters of the application group to which the unadapted application belongs, and then display the projection data of the unadapted application on the target virtual screen; by implementing the embodiment of the present application, It is possible to create a virtual screen based on expected screen parameters without intruding into unadapted applications, to ensure that unadapted applications can be displayed normally on different resolution car screens, and to improve the integrity and usability of unadapted application displays. This enables unadapted applications to obtain almost the same visual experience and interactive experience on all vehicles. .

Please refer to Fig. 10. Fig. 10 is a schematic structural diagram of the screen projection device based on the car-machine virtual screen disclosed in Embodiment 2 of the present application; the screen projection device based on the car-machine virtual screen shown in Fig. 10 is based on the The screen projection device based on the car-machine virtual screen is optimized based on the screen-projection device based on the car-machine virtual screen. The screen projection device based on the car-machine virtual screen shown in FIG. 10 further includes: a judging module 1010 .

Among them, the judging module 1010 is used to create the target virtual screen according to the car-machine virtual screen and the expected screen parameters of the application group to which the unadapted application belongs when the unadapted application is an application that does not support full-screen adaptive display. Before, determine whether the target virtual screen has been created;

The creation module 902 is specifically configured to create a target virtual screen according to the car-machine virtual screen and the expected screen parameters of the application group to which the unadapted application belongs when the judgment result of the judging module 1010 is negative.

In some optional implementations, the startup module 903 is further configured to multiplex the target virtual screen to start the unadapted application.

In some optional implementation manners, the above startup module 903 is further configured to directly display screen projection data on the car-machine virtual screen when the unadapted application is an application that supports full-screen adaptive display.

Implement the above-mentioned embodiment, after the vehicle-machine device is connected to the terminal device, receive the screen projection command of the terminal device, the screen projection command carries the screen projection data of the unadapted application, and the unadapted application does not support full-screen adaptive display When applying, you can first judge whether there is a target virtual screen. If so, directly reuse the target virtual screen to display the projection data. If not, according to the screen resolution of the car virtual screen and the expected screen parameters of the application group to which the unadapted application belongs , create a target virtual screen, and then display the projected screen data of the unadapted application on the target virtual screen; by implementing the embodiment of the present application, it is possible to use the preset expected screen parameters to create a It is suitable for the target virtual screen of the projected screen, ensuring that unadapted applications can be displayed normally on car screens with different resolutions, improving the integrity and usability of unadapted application display, so that unadapted applications can be obtained on all car screens Almost the same visual experience and interactive experience. In addition, when the unadapted application is an application that supports full-screen adaptive display, it can be directly displayed on the virtual screen of the car, and the unadapted application can be adaptively displayed in full screen on the virtual screen of the car without additional intervention .

In some optional implementations, the creation module 902 is used to create the target virtual screen according to the car-machine virtual screen and the expected screen parameters of the application group to which the unadapted application belongs:

Obtain expected screen parameters of the application group to which the unadapted application belongs, where the expected screen parameters at least include expected screen width, expected screen height, and expected screen pixel density; and, create a target virtual screen according to the expected screen parameters; and, place the target virtual screen on In a display container with the same size; and, calculate the scaling factor of the display container according to the screen resolution of the car-machine virtual screen; and, scale the display container according to the scaling factor; and, move the scaled display container to be completely displayed on the car-machine virtual screen a target virtual screen; and injecting a touch event of the vehicle-machine virtual screen into the target virtual screen.

Further optionally, the manner in which the above creation module 902 is used to calculate the scaling factor of the display container according to the screen resolution of the car machine is specifically as follows:

Get the actual screen parameters of the car-machine virtual screen, the actual screen parameters include at least the actual screen width and actual screen height; calculate the actual application area aspect ratio of the car-machine virtual screen according to the actual screen parameters; calculate the expected screen according to the expected screen parameters Resolution aspect ratio; Calculate the scaling factor of the display container based on actual screen parameters, expected screen parameters, actual application area aspect ratio, and expected screen resolution aspect ratio.

In addition, optionally, the manner in which the creation module 902 is used to move the scaled display container to completely display the target virtual screen on the car-machine virtual screen is as follows:

Calculate the horizontal translation amount and the vertical translation amount according to the expected screen parameters and the scaling factor; The target virtual screen is completely displayed on the screen.

In addition, optionally, the method for injecting the touch event of the car-machine virtual screen into the target virtual screen by the creation module 902 is specifically:

Listening to the touch event of the car-machine virtual screen; and acquiring the touch event coordinates of the car-machine virtual screen; and scaling the touch event coordinates according to the scaling factor; and injecting the processed touch event coordinates into the target virtual screen.

To implement the above implementation, you only need to use a set of fixed expected screen parameters to create a target virtual screen and combine the scalable characteristics of the TextureView display container, so that the unadapted application can display the page normally on different resolutions of the vehicle equipment Moreover, the display effect of each page is basically the same. The embodiment of the present application not only optimizes the interactive experience of the unadapted application, but also reduces the difficulty of accessing the unadapted application.

Please refer to Figure 11. Figure 11 is a schematic structural diagram of the vehicle-machine equipment disclosed in the embodiment of the present application; the vehicle-machine equipment shown in Figure 11 may include:

a memory 1110 storing executable program codes;

a processor 1120 coupled to the memory 1110;

Wherein, the processor 1120 invokes the executable program code stored in the memory 1110 to execute some or all steps of any one of the methods in FIG. 2 to FIG. 4 .

Please refer to Figure 12, Figure 12 is a schematic structural diagram of the vehicle disclosed in the embodiment of the present application; as shown in Figure 12, the vehicle may include:

For the in-vehicle device shown in FIG. 11 , please refer to the above-mentioned embodiment for how the in-vehicle device realizes the screen projection display of unadapted applications, and details will not be repeated here.

The embodiment of the present application also discloses a computer-readable storage medium, which stores a computer program, wherein the computer program causes a computer to execute the methods disclosed in FIGS. 2 to 4 .

The embodiment of the present application also discloses a computer program product. When the computer program product is run on a computer, the computer is made to execute some or all steps of any one of the methods disclosed in FIG. 2 to FIG. 4 .

The embodiment of the present application also discloses an application distribution platform, which is used to distribute a computer program product, wherein, when the computer program product is run on a computer, the computer is made to execute any one of the methods disclosed in Fig. 2 to Fig. 4 some or all of the steps.

Those of ordinary skill in the art can understand that all or part of the steps in the various methods of the above-mentioned embodiments can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium, and the storage medium includes read-only Memory (Read-Only Memory, ROM), Random Access Memory (Random Access Memory, RAM), Programmable Read-Only Memory (Programmable Read-only Memory, PROM), Erasable Programmable Read-Only Memory (Erasable Programmable Read Only Memory, EPROM), One-time Programmable Read-Only Memory (OTPROM), Electronically Erasable Programmable Read-Only Memory (EEPROM), Compact Disc Read-Only Memory (CompactDisc Read -Only Memory, CD-ROM) or other optical disk storage, magnetic disk storage, tape storage, or any other computer-readable medium that can be used to carry or store data.

The above is a detailed introduction of a screen projection method, device, vehicle-machine equipment and vehicle disclosed in the embodiment of the present invention based on the car-machine virtual screen. In this paper, a specific example is used to illustrate the principle and implementation of the present invention. The above The description of the embodiment is only used to help understand the method of the present invention and its core idea; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation and scope of application. As mentioned above, the contents of this specification should not be construed as limiting the present invention.

The above is a detailed introduction of a screen projection method, device, vehicle-machine equipment and vehicle disclosed in the embodiment of the present invention based on the car-machine virtual screen. In this paper, a specific example is used to illustrate the principle and implementation of the present invention. The above The description of the embodiment is only used to help understand the method of the present invention and its core idea; at the same time, for those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation and scope of application. As mentioned above, the contents of this specification should not be construed as limiting the present invention.

Claims (18)

1. A screen projection method based on a car-machine virtual screen, characterized in that it comprises: After the in-vehicle device is connected to the terminal device, a screen projection instruction of the terminal device is received, and the screen projection instruction carries screen projection data of an unadapted application; When the unadapted application is an application that does not support full-screen adaptive display, create a target virtual screen according to the car-machine virtual screen and the expected screen parameters of the application group to which the unadapted application belongs; The screen projection data is displayed on the target virtual screen. 2. The method according to claim 1, wherein when the unadapted application is an application that does not support full-screen adaptive display, and the application according to the car-machine virtual screen and the unadapted application belongs to Set expected screen parameters, before creating the target virtual screen, the method further includes: judging whether the target virtual screen has been created; If not, execute the step of creating a target virtual screen according to the car-machine virtual screen and the expected screen parameters of the application group to which the unadapted application belongs. 3. The method according to claim 2, wherein the method further comprises: If the target virtual screen has already been created, displaying the screen projection data on the target virtual screen. 4. The method according to any one of claims 1 to 3, wherein the creation of the target virtual screen according to the car-machine virtual screen and the expected screen parameters of the application group to which the unadapted application belongs includes: Acquire expected screen parameters of the application group to which the unadapted application belongs, where the expected screen parameters at least include expected screen width, expected screen height, and expected screen pixel density; creating a target virtual screen according to the expected screen parameters; placing the target virtual screen in a display container of the same size; calculating the scaling factor of the display container according to the screen resolution of the car-machine virtual screen; scaling the display container according to the scaling factor; moving the scaled display container to completely display the target virtual screen on the car-machine virtual screen; Injecting the touch event of the vehicle-machine virtual screen into the target virtual screen. 5. The method according to claim 4, wherein the calculating the scaling factor of the display container according to the screen resolution of the vehicle-machine virtual screen comprises: Acquiring actual screen parameters of the car-machine virtual screen, where the actual screen parameters at least include actual screen width and actual screen height; According to the actual screen parameters, calculate the aspect ratio of the actual application area of the car-machine virtual screen; Calculate an expected screen resolution aspect ratio according to the expected screen parameters; Calculate the scaling factor of the display container according to the actual screen parameters, the expected screen parameters, the actual application area aspect ratio and the expected screen resolution aspect ratio. 6. The method according to claim 5, wherein the moving the scaled display container to completely display the target virtual screen on the vehicle-machine virtual screen comprises: calculating a horizontal translation amount and a vertical translation amount according to the expected screen parameters and the scaling factor; According to the horizontal translation amount and the vertical translation amount, the zoomed display container is moved to the center of the vehicle-machine virtual screen, so as to completely display the target virtual screen on the vehicle-machine virtual screen. 7. The method according to claim 4, wherein the injecting the touch event of the vehicle-machine virtual screen into the target virtual screen comprises: Monitor the touch event of the virtual screen of the vehicle; Obtain the touch event coordinates of the car-machine virtual screen; performing scaling processing on the coordinates of the touch event according to the scaling factor; Inject the processed touch event coordinates into the target virtual screen. 8. The method according to claim 1, further comprising: When the unadapted application is an application that supports full-screen adaptive display, the projected screen data is directly displayed on the car-machine virtual screen. 9. A screen projection device based on a car-machine virtual screen, characterized in that it comprises: The receiving module is configured to receive a screen projection instruction of the terminal equipment after the vehicle-machine equipment is connected to the terminal equipment, and the screen projection instruction carries screen projection data of unadapted applications; A creation module, configured to create a target virtual screen according to the car-machine virtual screen and the expected screen parameters of the application group to which the unadapted application belongs when the unadapted application is an application that does not support full-screen adaptive display; A starting module, configured to display the screen projection data on the target virtual screen. 10. The device according to claim 9, further comprising: A judging module, configured to create a target virtual screen according to the car-machine virtual screen and the expected screen parameters of the application group to which the unadapted application belongs when the unadapted application is an application that does not support full-screen adaptive display Before, it is judged whether the target virtual screen has been created; The creating module is specifically configured to create a target virtual screen according to the car-machine virtual screen and the expected screen parameters of the application group to which the unadapted application belongs when the judgment result of the judging module is negative. 11. The device according to claim 10, characterized in that: The starting module is further configured to display the projected screen data on the target virtual screen when the judging result of the judging module is that the target virtual screen has been created. 12. The device according to any one of claims 9 to 11, wherein the creation module is used to create a target virtual screen according to the car-machine virtual screen and the expected screen parameters of the application group to which the unadapted application belongs The specific way is: Obtain expected screen parameters of the application group to which the unadapted application belongs, where the expected screen parameters at least include expected screen width, expected screen height, and expected screen pixel density; and, create a target virtual screen according to the expected screen parameters; and, placing the target virtual screen in a display container of the same size; and calculating a scaling factor of the display container according to the screen resolution of the vehicle-machine virtual screen; and scaling the display container according to the scaling factor; And, moving the scaled display container to completely display the target virtual screen on the car-machine virtual screen; and injecting a touch event of the car-machine virtual screen into the target virtual screen. 13. The device according to claim 12, wherein the method for the creation module to calculate the scaling factor of the display container according to the screen resolution of the vehicle is as follows: Acquiring actual screen parameters of the car-machine virtual screen, where the actual screen parameters at least include actual screen width and actual screen height; According to the actual screen parameters, calculate the aspect ratio of the actual application area of the car-machine virtual screen; Calculate an expected screen resolution aspect ratio according to the expected screen parameters; Calculate the scaling factor of the display container according to the actual screen parameters, the expected screen parameters, the actual application area aspect ratio and the expected screen resolution aspect ratio. 14. The device according to claim 13, wherein the method for the creation module to move the scaled display container to completely display the target virtual screen on the car-machine virtual screen is as follows: Calculate the horizontal translation amount and the vertical translation amount according to the expected screen parameters and the zoom factor; and move the zoomed display container to the car-machine virtual screen according to the horizontal translation amount and the vertical translation amount center position, so as to completely display the target virtual screen on the car-machine virtual screen. 15. The device according to claim 14, wherein the method for the creation module to inject the touch event of the car-machine virtual screen into the target virtual screen is as follows: Listening to the touch event of the car-machine virtual screen; and acquiring the touch event coordinates of the car-machine virtual screen; and scaling the touch event coordinates according to the scaling factor; and processing the processed touch event Coordinates are injected into the target virtual screen. 16. A vehicle-machine equipment, characterized in that it comprises: a memory storing executable program code; a processor coupled to the memory; The processor invokes the executable program code stored in the memory to execute the screen projection method based on the vehicle-machine virtual screen according to any one of claims 1 to 8. 17. A vehicle, comprising: The vehicle-machine equipment according to claim 16. 18. A computer-readable storage medium, on which a computer program is stored, wherein, when the program is executed by a processor, the steps of the method according to any one of claims 1 to 8 are implemented.

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