CN110007919A - A kind of dynamic density screen adaptation method and system for the automatic airport of unmanned plane - Google Patents

Abstract

The present invention discloses the dynamic density screen adaptation method and system for the automatic airport of unmanned plane, comprising: obtains the lateral virtual pixel value dp of design drawing；The horizontal pixel value px of dynamic acquisition screen resolution；Calculate new Android bulkfactor density and screen pixels density d pi；Old density and dpi are replaced using new Android bulkfactor density and screen pixels density d pi.The present invention is using the dp of design drawing as unified benchmark, the screen width of the various sizes of intelligent terminal of different resolution is allowed all to become consistent with the dp of design drawing, so as to be applied in the Android intelligent terminal of different screen size in the automatic airport of unmanned plane, realize the different intelligent terminal screen of the dynamic adaptation of design drawing, performance consumption is small, invasive to code extremely low, cost is extremely low.

Description

A dynamic density screen adaptation method and system for drone automatic airport

technical field

The invention relates to the technical field of application interface image processing, and more particularly, to a dynamic density screen adaptation method and system for an unmanned aerial vehicle automatic airport.

Background technique

In recent years, Unmanned Aerial Vehicle (UAV) has been widely used in various industries and fields due to its advantages of low cost, high flight accuracy, flexible maneuverability, and convenient use and operation, such as geological exploration, logistics transportation, Electric power inspection, agricultural plant protection, etc.

In the field of electric power inspection, drone inspection has become the norm, and the automated intelligent inspection system based on UAV and intelligent terminal equipment has also received more and more attention and use, and the automated intelligent inspection system has also vividly Known as an automatic airport, it can greatly improve the efficiency of power inspection, reduce labor costs, and eliminate personnel safety risks. The intelligent terminal equipment is located in the airport and is used to control a series of actions such as take-off, inspection flight, and landing of drones. , is the core of the automatic airport. In order to meet the needs of different scenarios, there are various models of drone automatic airports with different shapes and sizes, different rated powers, etc., so the internal Android smart terminal devices also use different models, so how to develop a set of application interfaces to adapt to different It is particularly important to avoid repeated development of Android smart terminal screens with different resolutions and sizes.

Since the use of drones in fixed airports often requires the replacement of Android smart terminals with different resolutions and sizes, for Android application developers, in the face of such a variety of Android smart terminals with fragmented screens, how can they develop an application interface? It is particularly important to adapt to the display of Android smart terminal screens of different resolutions and sizes to cope with the fragmented Android devices in the drone fixed airport scene.

The development of application interface is an important part of Android application development, and its development cost is even greater than the cost of application function development. The application interface is the part that deals directly with users, and a good user experience can make application products favored by users. If the developer does not notice the adaptation of the application interface at the beginning, after the development is completed, it will be a headache to find that the visual effect of the application interface on mobile phones of different sizes and resolutions is very different.

Starting from Android 5.0, Google Android officially launched the percentage layout support library, which is intended to solve most of the screen adaptation problems. Using the percentage layout as the root layout of the application interface, the width and height of the child controls are no longer set to a specific length value, but set to a percentage value. Since the root layout fills the entire screen, and the width and height of the child controls are a percentage of the screen width and height, no matter what the resolution of the screen is, the child controls will be displayed according to the percentage of the screen width and height, starting from From the perspective of scale, the visual effect is close, thus realizing the adaptation of the screen.

The principle of Google Android's official percentage layout scheme is very simple, that is, it is displayed in proportion. Through the ratio value, the real width and height of each UI control are calculated, and then rendered to the screen. As shown in Figure 1, it is the percentage layout effect displayed on mobile phones with different screen widths and heights.

The specific use of the program is as follows:

1. Add the following configuration to the configuration file of the Android code project:

compile'com.android.surpport:percent:25.3.0'

2. The percentage layout is introduced into the xml layout file, and the percentage value is used as the width and height of the UI sub-control, as shown in the following example:

Just follow the above usage methods, you can achieve screen adaptation.

For applications that have been developed without screen adaptation, if you use this solution for screen adaptation, you need to replace the root layout in all xml layout files with percentage layouts, and at the same time, you need to replace all xml The width and height involved in the layout file are modified and replaced by percentage. If the number of xml layout files is very large, then using this scheme to modify will introduce a lot of time and labor costs, and this cost may often be unaffordable. For application products that have been developed without screen adaptation, if this solution is used for screen adaptation, the code is very intrusive, violating the principle of "high cohesion, low coupling" in code design, and Excessive code intrusion may introduce new problems and cause unstable software operation.

Using this solution for screen adaptation consumes more performance, because the Android system needs to calculate the real width and height of each UI control according to the percentage value when rendering the interface. This calculation cost is relatively high, especially the number of rendered UI controls is large. case.

Therefore, there is an urgent need for a low-cost, simple, fast and elegant method to solve this problem, to meet the needs of Android smart terminal screen display under different sizes and resolutions, and to avoid maintaining and modifying multiple sets of application interfaces at the same time and increasing development costs, because The later maintenance and iteration cost of a software project is much higher than the early development cost, so this will have great application value for the development of Android application interface adaptation.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide a dynamic density screen adaptation method and system for an unmanned aerial vehicle automatic airport in view of the above-mentioned defects of the prior art.

The technical solution adopted by the present invention to solve the technical problem is: according to the first aspect of the present invention, a dynamic density screen adaptation method for an unmanned aerial vehicle automatic airport is provided, which specifically includes the steps:

S10. Obtain the horizontal virtual pixel value dp of the design drawing;

S20. Dynamically obtain the horizontal pixel value px of the screen resolution;

S30, calculate the new Android density coefficient density and screen pixel density dpi;

S40, replace the old Android density factor density and screen pixel density dpi with the new Android density factor density and screen pixel density dpi.

Preferably, the S40, using the new Android density coefficient density and screen pixel density dpi to replace the old Android density coefficient density and screen pixel density dpi, specifically includes the steps:

S410, use the new Android density coefficient density and screen pixel density dpi to replace the old Android density coefficient density and screen pixel density dpi;

S420. Update the Display Metrics object of the Android system;

S430. Render the UI interface layout.

Preferably, in S10, the horizontal virtual pixel value dp of the design drawing is obtained from the annotation description of the design drawing.

Preferably, the S20, dynamically obtaining the horizontal pixel value px of the screen resolution, specifically includes the steps:

The horizontal pixel value px of the screen resolution is dynamically obtained from the Display Metrics object of the Android system.

Preferably, the S30, calculating the new Android density coefficient density and screen pixel density dpi, the calculation formula is:

dpi=160*density.

The present invention also provides a computer-readable storage medium, on which a computer program is stored, and when the computer program is executed, realizes the above-mentioned dynamic density screen adaptation method for an unmanned aerial vehicle airport .

The present invention also provides a dynamic density screen adaptation device for an unmanned aerial vehicle airport, comprising a processor and a memory; wherein, the memory is used to store a computer program, and the processor is used to execute the computer program stored in the memory, to cause the processor to perform the dynamic density screen adaptation method for the drone autodrome as described above.

The present invention also provides a dynamic density screen adaptation system for UAV automatic airports, the dynamic density screen adaptation system is used to perform the above-mentioned dynamic density screen adaptation for UAV automatic airports method.

Implementing the technical scheme of the dynamic density screen adaptation method and system for the UAV automatic airport of the present invention has the following advantages or beneficial effects: the inventiveness of the present invention takes the width dp of the design The screen width of the Android smart terminal becomes the same as the width dp of the design drawing. Derive and calculate the new Android density coefficient density and screen pixel density dpi, and dynamically modify the density and dpi of the Android system. And it can be used not only for newly developed projects, but also for projects that have been developed. For Android applications that have been developed, it can be implemented simply by adding a few lines of code without modifying the original code. Therefore, the design drawings can be dynamically adapted to different smart terminal screens, with low performance consumption, extremely low code intrusion, and extremely low cost.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings used in the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, on the premise of no creative work, other drawings can also be obtained from these drawings, in the drawings:

1 is a schematic diagram of a percentage layout displayed by an intelligent terminal with different screen widths and heights in the prior art;

2 is a schematic flow chart of an embodiment of a dynamic density screen adaptation method for UAV automatic airports according to the present invention;

3 is a schematic display diagram of the device 1 according to the embodiment of the dynamic density screen adaptation method for the drone automatic airport according to the present invention;

FIG. 4 is a schematic display diagram of the device 2 according to the embodiment of the dynamic density screen adaptation method for the drone automatic airport of the present invention.

Detailed ways

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, various exemplary embodiments to be described hereinafter will be referred to the corresponding accompanying drawings, which form a part of the exemplary embodiments in which the implementation of the present invention is described. Various exemplary embodiments may be employed, unless otherwise indicated, the same numerals in the different figures refer to the same or similar elements. The implementations described in the illustrative examples below are not intended to represent all implementations consistent with this disclosure. It is to be understood that these are merely examples of apparatus and methods consistent with some aspects of the present disclosure, as detailed in the appended claims, and that other embodiments may be used, or that the embodiments recited herein may be used. Structural and functional modifications can be made without departing from the scope and spirit of the present invention. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

In the description of the present invention, it should be understood that the term px refers to the number of pixels on the screen, that is, the dots on the screen, which is related to the density; dpi refers to the pixel density, that is, the number of pixels per inch. The higher the value, the better the display. Clear, common values are 120, 160, 240, etc. dp refers to density-independent pixels, an Android-specific length unit, and a virtual pixel unit that should be used when defining UI layouts to represent layout dimensions or positions in a density-independent manner. Density independent pixel dp is equal to one physical pixel on a 160dpi screen. Converting dp units to screen pixels is simple: px=dp*(dpi/160). For example, on a 240dpi screen, 1dp equals 1.5 physical pixels. Density refers to the Android density coefficient, a calculated ratio value, that is, density=dpi/160 (pixels/inch). Resolution refers to the number of pixels in the vertical and horizontal directions of the screen. If the screen resolution is 1920*1080, it means that the screen has 1920 pixels in height and 1080 pixels in width. Screen size refers to the length of the diagonal of the screen. It should be noted that, unless otherwise clearly specified and limited, those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention according to specific situations.

In order to illustrate the technical solutions of the present invention, the following specific embodiments are used for description.

Example 1:

Figures 2-4 show schematic diagrams provided by the embodiments of the dynamic density screen adaptation method, storage medium, device and system for drone automatic airports according to the present invention. For convenience of description, only the embodiments of the present invention are shown. relevant part. The dynamic density screen adaptation method of the present invention includes the steps:

S10, obtaining the horizontal virtual pixel value dp of the design drawing; specifically, the horizontal virtual pixel value dp of the design drawing is obtained from the annotation description of the design drawing;

S20. Dynamically obtain the horizontal pixel value px of the screen resolution;

S30, calculate the new Android density coefficient density and screen pixel density dpi;

S40, replace the old Android density factor density and screen pixel density dpi with the new Android density factor density and screen pixel density dpi.

Specifically, the calculation formula of the screen pixel density dpi is:

Among them, the conversion relationship between dp and px: px=dp*(dpi/160)

Android density coefficient: density=dpi/160, and It can be obtained from the above conversion formula: px=density*dp. Since the screen of Android smart devices is seriously fragmented, fragmentation refers to the different resolutions or sizes of the screens.

As shown in Figure 3-4, if there are two Android smart terminals, the screen resolution is 1920*1200, device 1 is more than 8 inches, device 2 is more than 9 inches, the UI designer designed a 960dp × 600dp The drawings are displayed on the screens of the two devices as shown in Figure 3 and Figure 4 respectively. It can be seen from the example diagram that the two devices with the same screen resolution are different in size, resulting in the density coefficient value of Android device 1. The density is 2.0, and the screen width is 960dp; while the density coefficient value of Android device 2 is 1.5, and the screen width is 1280dp. Therefore, the display effects of UI controls with the same dp value are different on the two devices, and there is obviously a blank space on the right side of Android device 2.

In other words, the design drawing of the UI designer is 960dp×600dp, so it is no problem to put this drawing in device 1, because the screen width of device 1 is just 960dp, which can fill the entire screen; If the drawing is placed in Device 2, it cannot fill the entire screen, because the screen width of Device 2 is 1280dp, which is larger than the width of the design drawing. If the screen width of device 2 can be changed to 960dp, the adaptation problem will not be solved. According to the formula px=density*dp, the resolution px is fixed, and the screen width dp value of device 2 is modified to 960, as long as the density coefficient density value is changed, that is

In short, it is only necessary to derive the formula according to To dynamically change the value of the density coefficient density of the Android smart terminal, the virtual pixel value (width) dp of the screen can be scaled to achieve the effect of screen adaptation. It should be noted that, since density=dpi/160, in order to prevent the Android system from restoring density according to this formula, when modifying the density value of the Android system, it is also necessary to modify the screen pixel density dpi to dpi=160* density.

In this embodiment, the S40, using the new Android density coefficient density and screen pixel density dpi to replace the old Android density coefficient density and screen pixel density dpi, specifically includes the steps:

S410, use the new Android density coefficient density and screen pixel density dpi to replace the old Android density coefficient density and screen pixel density dpi;

S420. Update the Display Metrics object of the Android system;

S430. Render the UI interface layout.

In this embodiment, the S20, dynamically obtaining the horizontal pixel value px of the screen resolution, specifically includes the steps:

The horizontal pixel value px of the screen resolution is dynamically obtained from the Display Metrics object of the Android system.

The specific use method of the present invention (relates to program code development):

(1) In the Android code project, find the BaseActivity.java window base class file, and call the following code in the onCreate() method in the BaseActivity.java file.

(2) Replace "360" in the following code according to the horizontal width dp value in the original design drawing. If the original design drawing width is 1028dp, then "360" is changed to 1028.

Called code:

After using the method of the present invention, it has obvious effects when used on Android smart terminals with different screen widths. In short, it is the effect of horizontal scaling, which is equivalent to the effect of horizontally shrinking or horizontally enlarging a picture. From the horizontal dimension, after scaling Although the size of the picture has changed, it can still basically maintain the appearance of the picture itself, so as to achieve the purpose of adaptation. In addition, the present invention does not care about the screen width of the Android smart terminal, the present invention is concerned with the width of the original design drawing given by the UI designer, if the given original design drawing width is 1028dp, the present invention is used For application development to adapt, then the developed app will be installed on different Android smart terminals. The effect is: 1) If the screen width is an Android smart terminal of 1028dp, it is just right, and the picture will not become thinner in the horizontal direction. Will not become fat; 2) If the screen width is 960dp Android smart terminal, then the horizontal picture will shrink (thinner), but the image can be basically maintained; 3) If the screen width is 1920dp Android smart terminal, then horizontal The above picture will be enlarged (fat), but the appearance of the picture can be basically maintained; 4) The so-called screen adaptation does not mean that the size and shape are exactly the same, but can maintain the basic picture appearance.

In most cases, designers only design a set of UI design drawings for developers to develop the interface. The width and height of the design drawings and the width and height of the smart terminal screen are not necessarily equal. Since different smart terminals have different screen widths and heights, and there is usually only one set of design drawings, the width and height of the design drawings can be used as a benchmark to adapt to smart terminal screens of different resolutions. Based on the width and height of the design drawings, combined with the width and height of the actual smart terminal screen, the correction value is calculated to dynamically modify the density and dpi of the system, so that the design drawings can be scaled to fit different smart terminal screens. Since the density and dpi of the system only need to be modified once to take effect, there is no performance consumption problem; one call also means that the code intrusion is extremely low, and the core of this method is the benchmark zoom display, no need to change any original layout files. , the cost is very low.

For Android application products that have been developed without screen adaptation, the cost of using this method for later screen adaptation is very low, and it can even be said to be negligible, because it does not need to modify any original xml layout. file, which has high application value in the actual Android screen adaptation development work.

For Android developers who choose this method for screen adaptation in the early stage of development, the entire interface development process only needs to set the width and height of UI controls according to the dimensions marked in the UI design drawing, without considering screen adaptation. problems, making the developer's interface development work more focused, simple and efficient.

Using this method for Android screen adaptation, because the core of the method is to change the pixel density of the Android system before the interface is loaded and rendered, and the one-time setting is globally effective, it avoids the calculation cost of each rendering and drawing of the UI controls in the percentage scheme, so it is greatly Improve the performance of the application, making the application product more smooth and stable.

The invention creatively uses the width dp of the design drawings as a unified benchmark, so that the screen widths of Android smart terminals with different resolutions and sizes are consistent with the width dp of the design drawings. Derive and calculate the new Android density coefficient density and screen pixel density dpi, dynamically modify the density and dpi of the Android system, so as to realize the dynamic adaptation of design drawings to different smart terminal screens, with low performance consumption, extremely low code intrusion, and extremely high cost Low.

Embodiment 2:

Those of ordinary skill in the art can understand that all or part of the steps of implementing the above method embodiments may be completed by hardware related to computer programs. The aforementioned computer program can be stored in a computer-readable storage medium, and the storage medium is stored with a computer program, and when the computer program is executed (such as a processor), the execution includes the above-mentioned dynamic for the UAV automatic airport. The steps of the embodiment of the density screen adaptation method, and the aforementioned storage medium includes: ROM, RAM, magnetic disk or optical disk and other media that can store program codes.

Embodiment three:

The present invention also provides an embodiment of a dynamic density screen adaptation device, comprising a processor and a memory; wherein the memory is used to store a computer program, and the processor is used to execute the computer program stored in the memory, so that the processor executes the above The steps of an embodiment of a dynamic density screen adaptation method for a drone automatic airport.

Embodiment 4:

The present invention also provides a dynamic density screen adaptation system for drone automatic airports, the dynamic density screen adaptation system is used to implement the dynamic density screen for drone automatic airports as described in the first embodiment adaptation method.

After reading what is described below, one skilled in the art should appreciate that the various features described herein can be implemented by a method, data processing system or computer program product. Accordingly, these features may be expressed partly in hardware, entirely in software, or in a combination of hardware and software. Furthermore, the above-described features may also take the form of a computer program product stored on one or more computer-readable storage media containing computer-readable program code segments or instructions stored in a storage medium in the medium. The readable storage medium is configured to store various types of data to support operation of the device. A readable storage medium can be implemented by any type of volatile or nonvolatile storage device or a combination thereof. Such as static hard disk, state 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), optical storage devices, magnetic storage devices, flash memory, magnetic or optical disks and/or combinations thereof.

The above are only preferred embodiments of the present invention, and those skilled in the art know that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the present invention. In addition, in the teachings of this invention, these features and embodiments may be modified to adapt a particular situation and material without departing from the spirit and scope of the invention. Therefore, the present invention is not limited by the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of the present application belong to the protection scope of the present invention.

Claims (8)

1. a dynamic density screen adaptation method for unmanned aerial vehicle automatic airport, is characterized in that, comprises the steps: S10. Obtain the horizontal virtual pixel value dp of the design drawing; S20. Dynamically obtain the horizontal pixel value px of the screen resolution; S30, calculate the new Android density coefficient density and screen pixel density dpi; S40. Replace the old Android density coefficient density and screen pixel density dpi with the new Android density coefficient density and screen pixel density dpi. 2. dynamic density screen adaptation method according to claim 1, is characterized in that, described S40, utilize described new Android density coefficient density density and screen pixel density dpi to replace old Android density coefficient density and screen pixel density dpi , which includes the following steps: S410, replacing the old Android density coefficient density and screen pixel density dpi with the new Android density coefficient density and screen pixel density dpi; S420, updating the Display Metrics object of the Android system; S430. Render the UI interface layout. 3 . The dynamic density screen adaptation method according to claim 1 , wherein in S10 , the horizontal virtual pixel value dp of the design drawing is obtained from the annotation of the design drawing. 4 . 4. The dynamic density screen adaptation method according to claim 2, wherein the S20, dynamically obtaining the horizontal pixel value px of the screen resolution, specifically comprises the steps: The horizontal pixel value px of the screen resolution is dynamically obtained from the Display Metrics object of the Android system. 5. dynamic density screen adaptation method according to claim 3, is characterized in that, described S30, calculates new Android density coefficient density density and screen pixel density dpi, and calculation formula is: dpi=160*density. 6. A computer-readable storage medium, characterized in that, a computer program is stored on the storage medium, and when the computer program is executed, any one of claims 1-5 is implemented for automatic drones. Dynamic density screen adaptation method for airports. 7. A dynamic density screen adaptation device for an unmanned aerial vehicle automatic airport, characterized in that it comprises a processor and a memory; The memory is used for storing a computer program, and the processor is used for executing the computer program stored in the memory, so that the processor executes the automatic airfield for unmanned aerial vehicles according to any one of claims 1-5. Dynamic density screen adaptation method. 8. A dynamic density screen adaptation system for an unmanned aerial vehicle airport, wherein the dynamic density screen adaptation system is used for performing the method described in any one of claims 1-5 for unmanned aerial vehicles. Dynamic density screen adaptation method for automatic airports.