CN103678357B - A kind of method and device of acquisition for mobile terminal picture thumbnail - Google Patents
A kind of method and device of acquisition for mobile terminal picture thumbnail Download PDFInfo
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- CN103678357B CN103678357B CN201210336545.0A CN201210336545A CN103678357B CN 103678357 B CN103678357 B CN 103678357B CN 201210336545 A CN201210336545 A CN 201210336545A CN 103678357 B CN103678357 B CN 103678357B
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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
- G06F16/50—Information retrieval; Database structures therefor; File system structures therefor of still image data
Abstract
The invention belongs to Internet technical field more particularly to a kind of method and system of acquisition for mobile terminal picture thumbnail.The method of acquisition for mobile terminal picture thumbnail of the present invention includes: the notice for initiating to obtain thumbnail；When there is no the thumbnail of the thumbnail of corresponding picture or corresponding picture to be released in local cache, obtain the absolute path of picture file, the Record ID for inquiring picture file in media database, obtains the path of picture thumbnail by the Record ID of picture file；The thumbnail of corresponding picture is obtained by thumbnail path.The technical solution of the embodiment of the present invention has the following advantages that or the utility model has the advantages that the method and system of the acquisition for mobile terminal picture thumbnail of the embodiment of the present invention, which can in real time, quickly and effectively obtain picture thumbnail, improves acquisition picture thumbnail success rate, enhance user experience, improves consistency of the software on user experience.
Description
Technical field
The invention belongs to a kind of method of technical field of mobile terminals more particularly to acquisition for mobile terminal picture thumbnail and
Device.
Background technique
With the continuous development of mobile terminal and Internet technology, more and more users are browsed by mobile terminal Internet access
News or picture etc..Since picture is bigger, the mode that mobile terminal generallys use acquisition picture thumbnail is browsed.It is existing
The mode of some acquisition for mobile terminal picture thumbnails are as follows: original image is read in memory by mode one, obtains the height of original image
Degree and width calculate the size by the Target Photo after scaling, according to the ratio, create one it is new according to than
Example scaling after picture come achieve the purpose that obtain picture thumbnail；Mode two, mobile terminal operating system management service system
Media resource, while for the thumbnail of picture and the media resource of video type two sets of different proportions of generation, wherein media money
The relevant information in source will obtain picture thumbnail, Ke Yitong for example, filename, size, path etc. are stored in database
Access database is crossed, the path of specific thumbnail is obtained.Above-mentioned two ways has the disadvantage in that for mode one, wound
It builds one and expends very much the time than the picture after scaling according to size, if picture is sufficiently large, which may block UI
(User Interface, user interface) process, it is stuck so as to cause application program appearance, or the phenomenon that collapse, such as it is right
Under android system, default situations the EMS memory occupation amount of Android process be 16M, but in fact, Android java
The memory that layer can occupy is no more than 8M, therefore, in the application software for needing to handle a large amount of pictures, traditional picture scaling
Mode may cause Installed System Memory spilling, cause application software different if turned one's head not in time to the occupied memory of picture
Often exit；For mode two, because of immediate updating picture resource, but the path of picture resource may be arbitrary, system media
Resource can not timely respond to, such as after having imported any visual picture resource by PC for the mobile phone of android system,
By way of accessing system media database resource, the media resource record of the picture may be can not find in database, and wanted
Media database is updated, needs to notify system scanning medium resource by initiating system broadcasts, but whole process is very very long.
Summary of the invention
The present invention provides a kind of method and system of acquisition for mobile terminal picture thumbnail, it is intended to solve the prior art and obtain
It takes picture thumbnail mode that Installed System Memory is caused to overflow, exits application software extremely and scanning medium resource cost overlong time
Problem.
The invention is realized in this way a kind of method of acquisition for mobile terminal picture thumbnail, comprising:
Initiate the notice of acquisition thumbnail；
When there is no the thumbnail of the thumbnail of corresponding picture or corresponding picture to be released in local cache, obtain
The absolute path of picture file is inquired the Record ID of picture file in media database, is obtained by the Record ID of picture file
The path of picture thumbnail；
The thumbnail of corresponding picture is obtained by thumbnail path.
Another technical solution that the embodiment of the present invention is taken are as follows: a kind of system of acquisition for mobile terminal picture thumbnail, packet
It includes:
Notice initiation module: for initiating the notice of acquisition thumbnail；
Path obtains module: for not having the thumbnail of the thumbnail of corresponding picture or corresponding picture in local cache
The absolute path that picture file is obtained when being released, inquires the Record ID of the picture file in media database, passes through
The Record ID of picture file obtains the path of picture thumbnail；
Thumbnail obtains module: for obtaining the thumbnail of corresponding picture by thumbnail path.
The technical solution of the embodiment of the present invention has the following advantages that or the utility model has the advantages that the mobile terminal of the embodiment of the present invention obtains
The method and system of picture thumbnail are taken not have the thumbnail of the thumbnail of corresponding picture or corresponding picture in local cache
The absolute path that picture file is obtained when being released, inquires the Record ID of the picture file in media database, passes through
The Record ID of picture file obtains the path of picture thumbnail, and the thumbnail of corresponding picture is obtained by thumbnail path, can
In real time, it quickly and effectively obtains picture thumbnail and improves acquisition picture thumbnail success rate, enhance user experience, improve
Consistency of the software on user experience.
Detailed description of the invention
Attached drawing 1 is the flow chart of the method for the acquisition for mobile terminal picture thumbnail of first embodiment of the invention；
Attached drawing 2 is the flow chart of the method for the acquisition for mobile terminal picture thumbnail of second embodiment of the invention；
Attached drawing 3 is the structural schematic diagram of the system of the acquisition for mobile terminal picture thumbnail of first embodiment of the invention；
Attached drawing 4 is the structural schematic diagram of the system of the acquisition for mobile terminal picture thumbnail of second embodiment of the invention.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
Referring to Fig. 1, being the flow chart of the method for the acquisition for mobile terminal picture thumbnail of first embodiment of the invention.This
The method of the acquisition for mobile terminal picture thumbnail of invention first embodiment the following steps are included:
Step 100: initiating to obtain the notice of thumbnail；
In step 100, UI(User Interface, user interface can be passed through) thread initiate to obtain thumbnail it is logical
Know, naturally it is also possible to which the other modes such as plug-in unit are initiated to obtain thumbnail notice, such as by quicklook plug-in unit, initiate to obtain
It can also include: creation sub thread after the notifying process of thumbnail.
Step 110: whether inquiry local cache has in the thumbnail caching or inquiry local cache of corresponding picture
Whether the thumbnail of corresponding picture is released, if not having the contracting of the thumbnail of corresponding picture or corresponding picture in local cache
Sketch map has been released, then enters step 120, if having the thumbnail caching or corresponding diagram of corresponding picture in local cache
The thumbnail of piece is not released, then enters step 130；
Step 120: obtaining the absolute path of picture file, inquire the Record ID of the picture file in media database, lead to
The Record ID for crossing picture file obtains the absolute path of picture thumbnail；
In the step 120, the absolute path of picture file is obtained by asynchronous thread, it will be understood that implement in the present invention
In mode, the absolute path of picture file can also be obtained by other means；The figure in inquiry media database can be passed through
Piece table (Image table) determines that whether there is or not the records of the picture file, if system has overscanning to the picture, and joined media number
According to library, then there is effectively record in the picture in the database, and system can generate special thumbnail to picture, and by breviary
Scheme the thumbnails table being added in database as record, inquiry can obtain an effective ID and identify this document in data
Record in library, and the ID is also unique ID that picture thumbnail is identified in thumbnails table, is inquired by ID
Thumbnails table obtains the absolute path of thumbnail.
Step 130: directly return thumbnail path；
Step 140: the thumbnail of corresponding picture is obtained by thumbnail path, the picture thumbnail that will acquire is delayed
It deposits.
In step 140, the picture thumbnail that will acquire is cached in a manner of weak reference SoftReference,
In addition, thumbnail is discharged in time as needed and is accounted for when Installed System Memory not enough notifies Garbage Collector GC Resource recovery
Memory is unlikely to that low memory is caused to collapse application software.
Referring to Fig. 2, being the flow chart of the method for the acquisition for mobile terminal picture thumbnail of second embodiment of the invention.This
The method of the acquisition for mobile terminal picture thumbnail of invention second embodiment the following steps are included:
Step 200: initiating to obtain the notice of thumbnail, create sub thread；
In step 200, UI(User Interface, user interface can be passed through) thread initiate to obtain thumbnail it is logical
Know, naturally it is also possible to which the other modes such as plug-in unit are initiated to obtain thumbnail notice, such as pass through quicklook plug-in unit.
Step 210: whether inquiry local cache has in the thumbnail caching or inquiry local cache of corresponding picture
Whether the thumbnail of corresponding picture is released, if not having the contracting of the thumbnail of corresponding picture or corresponding picture in local cache
Sketch map has been released, then enters step 220；If there is the thumbnail of corresponding picture to cache or correspond in local cache
The thumbnail of picture is not released, then enters step 280；
Step 220: thumbnail request queue is added in picture, and starts sub thread and obtains thumbnail；
Step 230: obtaining the absolute path of picture file, by the absolute path, inquire the picture in media database
The Record ID (identity, identity) of file；
In step 230, the absolute path of picture file is obtained by asynchronous thread, it will be understood that implement in the present invention
In mode, the absolute path of picture file can also be obtained by other means；The figure in inquiry media database can be passed through
Piece table (Image table) determines that whether there is or not the records of the picture file, if system has overscanning to the picture, and joined media number
According to library, then there is effectively record in the picture in the database, and system can generate special thumbnail to picture, and by breviary
Scheme the thumbnails table being added in database as record, inquiry can obtain an effective ID and identify this document in data
Record in library, and the ID is also unique ID that picture thumbnail is identified in thumbnails table, is inquired by ID
Thumbnails table obtains the absolute path of thumbnail.
Step 240: obtaining the Record ID of the picture file；
Step 250: judging whether the picture file Record ID obtained is empty or effective, if the picture file note obtained
Record ID be not it is empty or effectively, then enter step 260, if the picture file Record ID obtained be it is empty or invalid, enter
Step 270；
In step 250, if the picture file Record ID obtained be it is empty or invalid, be due to system not in time more
Caused by new database.
Step 260: inquiry media database obtains the absolute path of picture thumbnail；
In step 260, the absolute road of picture thumbnail can be obtained by the thumbnails table in inquiry database
Diameter.
Step 270: parsing picture, obtain the height and width of picture, by calculate after be converted to thumbnail height and
Width generates the thumbnail of needs；
Step 280: directly return thumbnail path；
Step 290: the thumbnail of corresponding picture is obtained by thumbnail path, the picture thumbnail that will acquire is delayed
It deposits.
In step 290, the picture thumbnail that will acquire is cached in a manner of weak reference SoftReference,
In addition, thumbnail is discharged in time as needed and is accounted for when Installed System Memory not enough notifies Garbage Collector GC Resource recovery
Memory is unlikely to that low memory is caused to collapse application software.
Referring to Fig. 3, being the structural representation of the device of the acquisition for mobile terminal picture thumbnail of first embodiment of the invention
Figure.The device of the acquisition for mobile terminal picture thumbnail of first embodiment of the invention includes notice initiation module, thumbnail inquiry
Module, path obtain module, path return module and thumbnail and obtain module, wherein
The notice that notice initiation module is used to initiate to obtain thumbnail.Notice initiation module can pass through UI(User
Interface, user interface) thread initiation acquisition thumbnail notice, naturally it is also possible to the other modes such as plug-in unit, which are initiated to obtain, to contract
Sketch map notice, such as by quicklook plug-in unit, initiating to obtain after the notifying process of thumbnail can also include: creation sub-line
Journey.
Thumbnail enquiry module is used to inquire the thumbnail caching whether local cache has corresponding picture or inquiry originally
Whether the thumbnail of the correspondence picture in ground caching is released, if not having the thumbnail or right of corresponding picture in local cache
The thumbnail of picture is answered to be released, then passage path obtains the absolute path that module obtains picture file, if local
The thumbnail for having the thumbnail of corresponding picture to cache or correspond to picture in caching is not released, then passage path return module
Directly return to thumbnail path.
Path obtains the absolute path that module is used to obtain picture file, inquires the note of the picture file in media database
ID is recorded, the absolute path of picture thumbnail is obtained by the Record ID of picture file.Wherein, acquisition module in path passes through asynchronous line
The absolute path of journey acquisition picture file, it will be understood that in embodiments of the present invention, figure can also be obtained by other means
The absolute path of piece file；It can determine that whether there is or not the picture files by the picture table (Image table) in inquiry media database
Record, if system has overscanning to the picture, and joined media database, then the picture exists effectively in the database
Record, and system can generate special thumbnail to picture, and be added to thumbnail as record in database
Thumbnails table, inquiry can obtain an effective ID and identify the record of this document in the database, and the ID is also
Unique ID that picture thumbnail is identified in thumbnails table inquires thumbnails table by ID, obtains the absolute of thumbnail
Path.
Path return module is for directly returning to thumbnail path.
Thumbnail obtains the thumbnail that module is used to obtain corresponding picture by thumbnail path, the picture contracting that will acquire
Sketch map is cached.Wherein, the picture thumbnail that thumbnail acquisition module will acquire is with the side of weak reference SoftReference
Formula is cached, in addition, when Installed System Memory not enough notifies Garbage Collector GC Resource recovery, by thumbnail as needed and
When discharge the memory of occupancy, be unlikely to that low memory is caused to collapse application software.
Referring to Fig. 4, being the structural representation of the device of the acquisition for mobile terminal picture thumbnail of second embodiment of the invention
Figure.The device of the acquisition for mobile terminal picture thumbnail of second embodiment of the invention includes notice initiation module, thumbnail inquiry
Module, sub thread starting module, path obtains module, picture file Record ID judges mould, thumbnail generation module, path return
Module and thumbnail obtain module, wherein
The notice that notice initiation module is used to initiate to obtain thumbnail, creates sub thread.Notice initiation module can pass through
UI(User Interface, user interface) thread initiation acquisition thumbnail notice, naturally it is also possible to the other modes such as plug-in unit hair
It rises and obtains thumbnail notice, such as by quicklook plug-in unit, can also include: after initiating the notifying process of acquisition thumbnail
Create sub thread.
Thumbnail enquiry module is used to inquire the thumbnail caching whether local cache has corresponding picture or inquiry originally
Whether the thumbnail of the correspondence picture in ground caching is released, if not having the thumbnail or right of corresponding picture in local cache
It answers the thumbnail of picture to be released, then picture is added by thumbnail request queue by sub thread starting module, and open
Mover thread obtains thumbnail, if had in local cache, the thumbnail of corresponding picture is cached or the thumbnail of corresponding picture does not have
It is released, then passage path return module directly returns to thumbnail path.
Sub thread starting module is used to picture thumbnail request queue is added, and starts sub thread and obtain thumbnail.
Path obtains the absolute path that module is used to obtain picture file, inquires the note of the picture file in media database
ID is recorded, the absolute path of picture thumbnail is obtained by the Record ID of picture file.Wherein, acquisition module in path passes through asynchronous line
The absolute path of journey acquisition picture file, it will be understood that in embodiments of the present invention, figure can also be obtained by other means
The absolute path of piece file；It can determine that whether there is or not the picture files by the picture table (Image table) in inquiry media database
Record, if system has overscanning to the picture, and joined media database, then the picture exists effectively in the database
Record, and system can generate special thumbnail to picture, and be added to thumbnail as record in database
Thumbnails table, inquiry can obtain an effective ID and identify the record of this document in the database, and the ID is also
Unique ID that picture thumbnail is identified in thumbnails table inquires thumbnails table by ID, obtains the absolute of thumbnail
Path.
Picture file Record ID judgment module be used to judge the picture file Record ID obtained whether be it is empty or effective, such as
The picture file Record ID that fruit obtains is empty or invalid, then passage path obtains module polls media database, obtains picture
The absolute path of thumbnail；If the picture file Record ID obtained be not it is empty or effectively, pass through thumbnail generation module
Picture is parsed, the height and width of picture are obtained, by being converted to the height and width of thumbnail after calculating, generates the contracting of needs
Sketch map.
Thumbnail generation module obtains the height and width of picture, by being converted to breviary after calculating for parsing picture
The height and width of figure, generate the thumbnail of needs
Path return module is for directly returning to thumbnail path.
Thumbnail obtains the thumbnail that module is used to obtain corresponding picture by thumbnail path, the picture contracting that will acquire
Sketch map is cached.Wherein, the picture thumbnail that thumbnail acquisition module will acquire is with the side of weak reference SoftReference
Formula is cached, in addition, when Installed System Memory not enough notifies Garbage Collector GC Resource recovery, by thumbnail as needed and
When discharge the memory of occupancy, be unlikely to that low memory is caused to collapse application software.
The technical solution of the embodiment of the present invention has the following advantages that or the utility model has the advantages that the mobile terminal of the embodiment of the present invention obtains
The method and system of picture thumbnail are taken not have the thumbnail of the thumbnail of corresponding picture or corresponding picture in local cache
The absolute path that picture file is obtained when being released, inquires the Record ID of the picture file in media database, passes through
The Record ID of picture file obtains the path of picture thumbnail, and the thumbnail of corresponding picture is obtained by thumbnail path, can
In real time, it quickly and effectively obtains picture thumbnail and improves acquisition picture thumbnail success rate, enhance user experience, improve
Consistency of the software on user experience.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc., should all be included in the protection scope of the present invention within mind and principle.
Claims (6)
1. a kind of method of acquisition for mobile terminal picture thumbnail, comprising:
The notice of acquisition thumbnail is initiated, sub thread is created, passes through user-interface thread and initiates to obtain thumbnail notice；
Whether inquiry local cache has the contracting of the thumbnail caching or the correspondence picture in inquiry local cache of corresponding picture
Whether sketch map is released, if not having the thumbnail of corresponding picture or the thumbnail of corresponding picture to be released in local cache
It bleeds off, then thumbnail request queue is added in picture, and start sub thread and obtain thumbnail, obtain the absolute road of picture file
Diameter；
By the absolute path, the record I D of picture file in media database is inquired, the record I D of picture file is passed through
Obtain the path of picture thumbnail；
The thumbnail of corresponding picture is obtained by thumbnail path, the picture thumbnail that will acquire is carried out in a manner of weak reference
Caching.
2. the method for acquisition for mobile terminal picture thumbnail according to claim 1, which is characterized in that the initiation obtains
After the notifying process of thumbnail further include: if there is the thumbnail of corresponding picture to cache or correspond to the contracting of picture in local cache
Sketch map is not released, then returns to thumbnail path.
3. the method for acquisition for mobile terminal picture thumbnail according to claim 1, which is characterized in that the inquiry media
In database after the record I D step of picture file further include: the record I D for obtaining the picture file judges the picture obtained
If whether file record I D is that perhaps effective picture file record I D obtained is not empty or effective, inquiry media to sky
Database obtains the absolute path of picture thumbnail, if the picture file record I D obtained parses for sky or in vain
Picture obtains the height and width of picture, by being converted to the height and width of thumbnail after calculating, generates the breviary of needs
Figure.
4. a kind of system of acquisition for mobile terminal picture thumbnail, comprising:
It notifies initiation module, for initiating the notice of acquisition thumbnail, creates sub thread, pass through user-interface thread and initiate to obtain
Thumbnail notice；
Path obtains module, for not had the thumbnail of the thumbnail of corresponding picture or corresponding picture in local cache
The absolute path that picture file is obtained when being released, inquires the record I D of the picture file in media database, passes through picture
The record I D of file obtains the path of picture thumbnail；
Thumbnail enquiry module, for inquiring, whether local cache has the thumbnail caching of corresponding picture or inquiry is locally delayed
Whether the thumbnail of the correspondence picture in depositing is released, if not having the thumbnail or corresponding diagram of corresponding picture in local cache
The thumbnail of piece has been released passage path and has obtained the absolute path that module obtains picture file；
Sub thread starting module, the sub thread starting module is used to picture thumbnail request queue is added, and starts sub-line
Journey obtains thumbnail；
Thumbnail obtains module: for obtaining the thumbnail of corresponding picture, the picture breviary that will acquire by thumbnail path
Figure is cached in a manner of weak reference.
5. the system of acquisition for mobile terminal picture thumbnail according to claim 4, which is characterized in that further include that path is returned
Module is returned, if had in local cache, the thumbnail of corresponding picture is cached or the thumbnail of corresponding picture is not released,
Passage path return module returns to thumbnail path.
6. the system of acquisition for mobile terminal picture thumbnail according to claim 4, which is characterized in that further include picture text
Part records I D judgment module and thumbnail generation module, the figure that the picture file record I D judgment module is used to judge to obtain
If piece file record I D whether be the empty picture file record I D perhaps effectively obtained be it is empty or invalid, pass through road
Diameter obtains module polls media database, obtains the absolute path of picture thumbnail；If the picture file record I D obtained is not
Be it is empty or effectively, then picture is parsed by thumbnail generation module, obtains the height and width of picture, by being converted after calculating
For the height and width of thumbnail, the thumbnail of needs is generated.
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| CN106407367A (en) * | 2016-09-08 | 2017-02-15 | 深圳市彬讯科技有限公司 | Method for quickly viewing pictures online |
| CN106484769A (en) * | 2016-09-08 | 2017-03-08 | 深圳市彬讯科技有限公司 | A kind of method of online quick access queries picture |
| CN109491726B (en) * | 2018-11-16 | 2021-11-09 | 掌阅科技股份有限公司 | Method for presenting open screen file, electronic device and computer storage medium |
| CN109800783A (en) * | 2018-12-11 | 2019-05-24 | 中新金桥数字科技(北京)有限公司 | The method and its system of super large picture superposition comparison are realized based on Android Pad |
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