CN110188211B - Method for rapidly loading multimedia application list in android vehicle-mounted system - Google Patents
Method for rapidly loading multimedia application list in android vehicle-mounted system Download PDFInfo
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- CN110188211B CN110188211B CN201910338171.8A CN201910338171A CN110188211B CN 110188211 B CN110188211 B CN 110188211B CN 201910338171 A CN201910338171 A CN 201910338171A CN 110188211 B CN110188211 B CN 110188211B
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
- G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
- G06F3/048—Interaction techniques based on graphical user interfaces [GUI]
- G06F3/0481—Interaction techniques based on graphical user interfaces [GUI] based on specific properties of the displayed interaction object or a metaphor-based environment, e.g. interaction with desktop elements like windows or icons, or assisted by a cursor's changing behaviour or appearance
- G06F3/0482—Interaction with lists of selectable items, e.g. menus
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/40—Information retrieval; Database structures therefor; File system structures therefor of multimedia data, e.g. slideshows comprising image and additional audio data
- G06F16/43—Querying
- G06F16/432—Query formulation
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F16/00—Information retrieval; Database structures therefor; File system structures therefor
- G06F16/40—Information retrieval; Database structures therefor; File system structures therefor of multimedia data, e.g. slideshows comprising image and additional audio data
- G06F16/43—Querying
- G06F16/438—Presentation of query results
- G06F16/4387—Presentation of query results by the use of playlists
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F8/00—Arrangements for software engineering
- G06F8/30—Creation or generation of source code
- G06F8/31—Programming languages or programming paradigms
- G06F8/315—Object-oriented languages
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/44—Arrangements for executing specific programs
- G06F9/445—Program loading or initiating
- G06F9/44521—Dynamic linking or loading; Link editing at or after load time, e.g. Java class loading
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F9/00—Arrangements for program control, e.g. control units
- G06F9/06—Arrangements for program control, e.g. control units using stored programs, i.e. using an internal store of processing equipment to receive or retain programs
- G06F9/44—Arrangements for executing specific programs
- G06F9/451—Execution arrangements for user interfaces
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
Abstract
The invention discloses a method for rapidly loading a multimedia application list applied to an android vehicle-mounted system. The invention improves the multiplexing rate and expandability of the multimedia application list through the data information in the user-definable database, further optimizes the data structure class of the multimedia application list, realizes the logic processing in the adapter by encapsulating the two different types of data structures of the file and the folder into the same type of data structure, and does not need to greatly modify the adapter so as to enable the loading and displaying of the multimedia application list to be faster.
Description
Technical Field
The invention relates to the field of android vehicle-mounted multimedia application development, in particular to a method for rapidly loading a multimedia application list in an android vehicle-mounted system.
Background
Along with the technological change, the vehicle-mounted system is more and more paid attention to by consumers, and whether a set of vehicle-mounted system is convenient and easy to use nowadays becomes one of the judging conditions for the consumers to purchase automobiles. The android system is the first choice of most vehicle-mounted systems by virtue of the advantages of platform openness, source opening system, richness of hardware, seamless combination of application programs and the like, but the direct use of the native android system as the vehicle-mounted system can generate a plurality of defects as if the native android system needs to encapsulate data structure types of media when displaying a multimedia application list, and the data needed by users are screened out and encapsulated by conveniently calculating files under a specified directory, so that usable media data are generated and then put into a basic adapter provided by the android for adaptive display. If the data volume in the storage medium is large or the data needs to be read and written frequently, the operation time is longer, and the display of the list is directly influenced, so that the user experience is influenced. The multimedia application is a standard application of the android vehicle-mounted system, such as a music player, a video player, a gallery album and the like, the functions of the android vehicle-mounted system are more and more abundant at present, the multimedia application list is an important component of the android system, and the loading speed of the list is the most visual use feeling of a user on the android system. Therefore, in order to meet the needs of users for different experiences of the android vehicle-mounted system multimedia application list, various vehicle-mounted system manufacturers need to adjust and display all media file information, adjust and display media directory information, adjust and display two-stage media directory information, but have no universal mode to be compatible with different requirements of consumers, so that the reusability is low, and the program development period is long.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, and provides a method for rapidly loading and displaying a multimedia application list, which is applied to an android vehicle-mounted system, and a technical method capable of improving the multiplexing rate of the application list and enhancing the expandability.
The technical scheme of the invention is realized as follows:
a method for rapidly loading a multimedia application list for an android vehicle-mounted system, the method comprising the following steps:
when the insertion of the external equipment is detected, the media scanning process processes the data on the external equipment, analyzes the file simple information meeting the user-defined conditions at the highest speed, stores the file simple information into the media database, informs the media application process that the data can be acquired for display, and then continues to carry out the file deep analysis so as to quickly display the data.
Further, after receiving the notification status of the media scanning process, the media application process sends a message to the media database requesting to retrieve data.
Further, the media database retrieves the data and returns the data to the media application process, and the media application process can package the data into operable data types according to the user requirements.
Further, the packaged data is placed into An Zhuoshi adapters for further adaptive presentation or list display.
Further, when the user operates to enter a different directory, the query data interface provided by the media application process is called, data is requested from the media database, and the two steps of the method are re-executed.
Further, the data type is an operable data type packaged by combining the data structure class of the folder and the data structure class of the file.
Further, the media scanning process and the media application process work independently of each other and interact through a C/S mode.
Compared with the prior art, the method and the device have the advantages that the multiplexing rate and the expandability of the multimedia application list are improved through the data information in the user-customizable database, the data structure class of the multimedia application list is further optimized, the logic processing in the An Zhuoshi adapter is realized through the mode of packaging two different types of data structures of the file and the folder into the same type of data structure, and the An Zhuoshi adapter does not need to be greatly transformed, so that the multimedia application list is loaded and displayed more quickly.
Drawings
The invention is described in further detail below in connection with the embodiments in the drawings, but is not to be construed as limiting the invention in any way.
FIG. 1 is a schematic diagram of the present invention;
fig. 2 is a schematic diagram of a conventional multimedia application list principle;
in the figure: 1. a media scanning process; 2. a media database; 3. a media application process; 4. placing the packaged data into a An Zhuoshi adapter; 5. informing the state; 6. retrieving data; 7. and returning the retrieved data.
Detailed Description
The invention is further described below with reference to the accompanying drawings, which are not intended to limit the invention.
As shown in fig. 1, the method for rapidly loading the multimedia application list applied to the android vehicle-mounted system comprises the following steps:
step 1: when the insertion of the external equipment is detected, the media scanning process 1 processes the data on the external equipment, analyzes the file simple information meeting the user-defined conditions at the fastest speed, stores the file simple information into the media database 2, can carry out addition, deletion and correction check through mysql sentences of database query operation, informs the media application process 3 of acquiring data for display, and can display the data quickly by comparing with the media scanning strategy of the google company, the data generated by the database can be faster by querying the user-defined database, and the method of the user-defined scanning strategy is better in performance on a vehicle-mounted system, so that the data displayed by a list can be faster, and the subsequent file deep analysis can be continued, so that the data can be displayed quickly.
Step 2: after receiving the notification status 5 of the media scanning process 1, the media application process 3 sends a message to the media database 2 requesting to retrieve data 6.
Step 3: after the media database 2 retrieves the data, the retrieved data 7 is returned to the media application process 3, and the media application process 3 can package the data into an operable data type fileData according to the user requirement.
Step 4: the packaged data fileData is placed into An Zhuoshi adapter 4BaseAdapter for further adaptive presentation or list display.
Step 5: when a user operates to enter a different directory, the query data interface provided by the media application process 3 is called, data is requested from the media database 2, and the method steps in steps 3 to 4 are re-executed.
Description of principle:
1. the media scanning process 1 and the media application process 3 work independently, and perform AIDL interface protocol interaction through a C/S mode, a server exists in a system background, has no visible interface, works in the background all the time, and is responsible for processing the scanning of external equipment data and a media database management part; the client is responsible for data display and media playing, when the client is started, the client inquires the current data state of the server and requests media playing data, after the server returns the data, the client can see the music list data, and when a user selects a song in the list, the playing operation can be performed. The following is a playlist that is visible in the player, and the data is displayed by querying the database, returning the data, performing data encapsulation processing, and storing the data in the An Zhuoshi adapter.
2. The function of the media scanning process 1 is to scan data of the USB device and insert the data into the custom media database 2, and notify the application process to enter a scanning state; the function of the media application process 3 is to obtain the data of the media database 2 according to the service requirement of the user for data display.
3. The data structure classes mediafolder bean and a file data structure class MeidaBean of the original two groups of data type folders are combined into a data type MeidaBean, which is a dual-purpose data format package, and an attribute isFolder can be added, which is an attribute capable of distinguishing files and folders, so that the data type MeidaBean can be suitable for a pure folder list, a pure file list and a folder and file list form, and has the advantages of simplifying logic operation in the An Zhuoshi adapter 4BaseAdapter, realizing quick display, simultaneously combining different service requirements, and being used for packaging realization codes as follows:
as shown in fig. 2, the conventional multimedia application list steps are:
step 1: when the application detects that the external equipment is inserted, starting to conveniently carry out the media file, and searching the file meeting the condition in a recursion mode;
step 2: defining a data structure class mediafolder bean and a data structure class MeidaBean of media, and packaging the searched data into two groups of data sources List < mediafolder bean > folder data and List < MeidaBean > fileData;
step 3: placing folderData and fileData into a An Zhuoshi adapter BaseAdapter for UI adaptation, loading the UI adaptation into a control ListView for display, and rewriting functions such as getCount (), getItem (), getView () and the like of the BaseAdapter, wherein frequent operation of the folderData and fileData data is involved;
step 4: when the user operates the media folder to enter the next level of directory, the 2, 3-step logic needs to be re-executed.
Compared with the traditional multimedia application list implementation principle, the method has the advantages that step 1 of the method increases the speed of searching stored data under user-defined conditions, and has higher multiplexing rate and stronger expandability compared with the traditional traversal recursion searching condition mode; compared with the traditional mode of defining data structure class, the method adopting the compatibility data format packaging mode in steps 2 to 4 does not need to greatly modify the An Zhuoshi adapter, has quicker logic processing capability, and finally realizes the rapid loading and displaying of the multimedia application list by the android vehicle-mounted system.
The above embodiment is only one of the preferred embodiments of the present invention, and the ordinary changes and substitutions made by those skilled in the art within the scope of the present invention should be included in the scope of the present invention.
Claims (4)
1. A method for rapidly loading a multimedia application list applied to an android vehicle-mounted system is characterized by comprising the following steps that when an external device is detected to be inserted, a media scanning process (1) processes data on the external device, file simple information meeting user-defined conditions is analyzed out at the highest speed, the file simple information is stored in a media database (2), the media database (2) is informed that the media application process (3) can acquire data for display, the media database (2) returns the retrieved data (7) to the media application process (3) after retrieving the data, the media application process (3) can package the data into an operable data type according to user requirements, the packaged data is placed into a An Zhuoshi adapter (4) for further adaptive display or list display, when the user operates to enter different catalogues, a query data interface provided by the media application process (3) is called, the media database (2) is requested for data, the media database (2) is re-executed, the retrieved data (7) is returned to the media application process (3) after retrieving the data, the application process (3) can package the data into the operable data type according to user requirements, the packaged data can be further subjected to adaptive display, and the packaged data can be further subjected to the step An Zhuoshi, and the data can be further subjected to the adaptive display according to the requirements.
2. The method for quickly loading a list of multimedia applications in an android in-vehicle system according to claim 1, further comprising the step of sending a message requesting to retrieve data (6) to said media database (2) after said media application process (3) receives a notification status (5) of said media scanning process (1).
3. The method for quickly loading the multimedia application list in the android vehicle-mounted system according to claim 2, wherein the data types are encapsulated into operable data types by combining a data structure class of a folder and a data structure class of a file.
4. A method for fast loading a list of multimedia applications for an android in-vehicle system according to any of claims 1 to 3, characterized in that said media scanning process (1) and said media application process (3) are working independently and interact through a C/S mode.
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