CN103246729A - Method and system for processing multi-media files of android mobile terminal - Google Patents
Method and system for processing multi-media files of android mobile terminal Download PDFInfo
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- CN103246729A CN103246729A CN2013101703071A CN201310170307A CN103246729A CN 103246729 A CN103246729 A CN 103246729A CN 2013101703071 A CN2013101703071 A CN 2013101703071A CN 201310170307 A CN201310170307 A CN 201310170307A CN 103246729 A CN103246729 A CN 103246729A
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Abstract
The invention discloses a method for processing multi-media files of an android mobile terminal. The method is characterized by comprising the steps of S11: going through tabloid charts of multi-media files in an android system database, establishing one-to-one mapping function relationships between identities (IDs) of multi-media files and tabloid chart information of multi-media files, and saving mapping function relationships in a memory cache; S12: going through original charts of multi-media files in the android system database to obtain file-related information of all multi-media files, wherein the file-related information contains IDs; and S13: according to the ID and the mapping function relationship of each multi-media file, conducting quick matching in the memory cache to obtain the tabloid chart information of multi-media files, and presenting the tabloid chart information to users. By the aid of the method, users can obtain the tabloid chart information of multi-media files quickly, so that the waiting time of users is greatly shortened, and the user experience is greatly improved. Besides, the invention also discloses a system for processing multi-media files of the android mobile terminal.
Description
Technical field
The present invention relates to Internet technical field, particularly a kind of method of handling the multimedia file of Android mobile terminal.In addition, the invention still further relates to a kind of system that handles the multimedia file of Android mobile terminal.
Background technology
The Android system is by all multimedia files on the android.provider.MediaStore unified management equipment; its data are stored in the SQLite of the system database file; and arrange by authority the data library file is protected, other application programs conduct interviews by the corresponding class in the android.provider bag.
SQLite database file storage directory:
/data/data/com.android.providers.media/databases/。
The SQLite database file: the multimedia document information on the mobile phone storage inside is stored among the internal.db; Multimedia document information on the mobile phone SD card is stored among the external-*.db.
Table in the SQLite database:
As above shown in the table, the Android system is stored in picture file information respectively in the different tables with its picture thumbnail fileinfo, video file information and its video thumbnails fileinfo, music file information and its front cover picture fileinfo.In order to get access to the complete information of picture, video, music file, traditional Android mobile phone assistant class software has adopted the mode of two-stage traversal when the multimedia file of enumerating by android.provider.MediaStore on the user mobile phone:
Enumerate picture:
In first order traversal, in system library file, obtain the information of all picture files by android.provider.MediaStore.Images.Media, as: Image ID, file path, size, creation-time etc. produce 1 query manipulation to system database in this process; In the traversal of the second level, in system library file, inquire about the picture thumbnail fileinfo that is complementary with each Image ID by android.provider.MediaStore.Images.Thumbnails, in this process, system database is produced N query manipulation.
Enumerate video:
In first order traversal, in system library file, obtain the information of all video files by android.provider.MediaStore.Video.Media, as: video ID, file path, size, creation-time, playing duration etc. produce 1 query manipulation to system database in this process; In the traversal of the second level, in system library file, inquire about the video thumbnails fileinfo that is complementary with each video ID by android.provider.MediaStore.Video.Thumbnails, in this process, system database is produced N query manipulation.
Enumerate music:
In first order traversal, in system library file, obtain the information of all music files by android.provider.MediaStore.Audio.Media, as: music ID, file path, size, creation-time, playing duration, special edition, album art man, school etc. produce 1 query manipulation to system database in this process; In the traversal of the second level, in system library file, inquire about the front cover picture fileinfo that is complementary with each music ID by android.provider.MediaStore.Audio.Albums, in this process, system database is produced N query manipulation.
In said process the system library file common property has been given birth to 1+N query manipulation (wherein N is corresponding multimedia file number), along with the growth of corresponding multimedia file number, the time of its consumption increases linearly.
In addition, traditional Android mobile phone assistant class software is all repeating above-mentioned identical step at every turn when enumerating multimedia file, caused unnecessary time overhead.
Summary of the invention
The technical problem to be solved in the present invention is for providing a kind of method of handling the multimedia file of Android mobile terminal, this method can make the user obtain the thumbnail information of multimedia file rapidly, thereby significantly reduce user's stand-by period, significantly improve user's experience.In addition, another technical matters that will solve of the present invention is for providing a kind of system that handles the multimedia file of Android mobile terminal.
For solving the problems of the technologies described above, the invention provides a kind of method of handling the multimedia file of Android mobile terminal, comprise the steps:
S11: the breviary chart of the multimedia file in the traversal Android system database, set up the mapped function relation one by one of the thumbnail information of the ID of multimedia file and multimedia file, and this mapped function relation is stored in the memory cache;
S12: travel through the original chart of the multimedia file in the Android system database, obtain the file-related information that comprises ID of each multimedia file;
S13: according to ID and the described mapped function relation of each multimedia file, coupling obtains the thumbnail information of multimedia file fast in memory cache, and presents to the user.
Preferably, also comprise the steps: after the step S13
S14: from the Android system database, obtain the current ID tabulation of multimedia file, and this current ID tabulation is compared with the ID tabulation in the memory cache, judge whether to change; If do not change, then turn to following step S15; If change, then turn to above-mentioned steps S11;
S15: notice is not upgraded, and directly the thumbnail information in the memory cache is presented to the user.
Preferably, when the user opened mobile terminal equipment, the assistant service application program in the equipment of mobile terminal was just obtained the current I D tabulation of multimedia file automatically.
Preferably, described mapped function relation is stored in the memory cache of mobile terminal equipment.
Preferably, described mapped function relation is kept in the memory cache of the PC end that is connected with mobile terminal equipment.
Preferably, described mapped function relation is Hash table or sparse array.
In addition, for solving the problems of the technologies described above, the present invention also provides a kind of system that handles the multimedia file of Android mobile terminal, comprising:
The first traversal unit: be used for the breviary chart of the multimedia file of traversal Android system database, set up the mapped function relation one by one of the thumbnail information of the ID of multimedia file and multimedia file, and this mapped function relation is stored in the memory cache;
The second traversal unit: travel through the original chart of the multimedia file in the Android system database, obtain the file-related information that comprises ID of each multimedia file;
Quick matching unit: according to ID and the described mapped function relation of each multimedia file, coupling obtains the thumbnail information of multimedia file fast in memory cache, and presents to the user.
Preferably, also comprise:
Judging unit: from the Android system database, obtain the current ID of multimedia file tabulation, and ID tabulation that will be current compares with ID table in the memory cache, judge whether to change; If do not change, then turn to following step S15; If change, then turn to above-mentioned steps S11;
Direct display unit: notice is not upgraded, and directly the thumbnail information in the memory cache is presented to the user.
Preferably, also comprise:
Automatic acquiring unit: when the user opened mobile terminal equipment, the assistant service application program in the equipment of mobile terminal was just obtained the current ID tabulation of multimedia file automatically.
Preferably, described file-related information comprises ID, file path, size and creation-time.
Below discuss technique effect of the present invention:
A kind of method of handling the multimedia file of Android mobile terminal provided by the present invention comprises the steps: S11: the breviary chart of the multimedia file in the traversal Android system database, set up the mapped function relation one by one of the thumbnail information of the ID of multimedia file and multimedia file, and this mapped function relation is stored in the memory cache;
S12: travel through the original chart of the multimedia file in the Android system database, obtain the file-related information that comprises ID of each multimedia file;
S13: according to ID and the described mapped function relation of each multimedia file, coupling obtains the thumbnail information of multimedia file fast in memory cache, and presents to the user.
In technique scheme, the present invention has introduced SparseArray (sparse array) or hashmap(Hash table) the system library file query manipulation is converted into quick coupling in the internal memory, inquiry times is reduced to 1+1 time from 1+n time:
Be example to enumerate picture:
At first by traversal android.provider.MediaStore.Images.Thumbnails foundations＜Image ID, picture thumbnail fileinfo〉SparseArray or the Hashmap of type, in this process to 1 query manipulation of system database generation.Obtain the information of all picture files then by traversal android.provider.MediaStore.Images.Media, as: Image ID, file path, size, creation-time etc., and by the ID of each picture directly matches this picture correspondence fast in SparseArray or Hashmap thumbnail information, in this process, system database is only produced query manipulation 1 time.
In technique scheme, " operation of 1+N secondary data library inquiry " is converted to " operation of 1+1 secondary data library inquiry adds internal memory operation N time ".And database query operations comes down to hard disk read operation that the data library file is carried out.And " internal memory reading speed " is " hard disk reading speed " 100000 times to 1000000 times, and we suppose that multiple is X, and then the time of 1 secondary data library inquiry operation consumption is designated as X, and the time of an internal memory operation consumption is designated as 1.
This programme with respect to the time consuming ratio of traditional scheme is:
(X+X+N*1)/((1+N) * X) ≈ 2/ (1+N) (wherein N is the multimedia file number)
And because the multimedia file of having introduced in this programme on the ID cache list mechanism detection user mobile phone changes, when the multimedia file on the user mobile phone did not have change, the time of consumption, still less the user experienced better.
In sum, a kind of method of handling the multimedia file of Android mobile terminal provided by the present invention can make the user obtain the thumbnail information of multimedia file rapidly, thereby significantly reduces user's stand-by period, significantly improves user's experience.
In addition, a kind of system that handles the multimedia file of Android mobile terminal provided by the present invention, its technique effect is identical with above-mentioned technique effect, and this paper repeats no more.
Description of drawings
Fig. 1 is the process flow diagram of a kind of method of the multimedia file of handling the Android mobile terminal in an embodiment of the present invention;
Fig. 2 is the process flow diagram of a kind of method of the multimedia file of handling the Android mobile terminal among the another kind of embodiment of the present invention;
Fig. 3 is for adopting the interaction figure of mobile terminal of the present invention HELPER APPLICATION;
Fig. 4 is for adopting the sequential chart of mobile terminal of the present invention HELPER APPLICATION.
Embodiment
Core of the present invention is for providing a kind of method of handling the multimedia file of Android mobile terminal, and this method can make the user obtain the thumbnail information of multimedia file rapidly, thereby significantly reduces user's stand-by period, significantly improves user's experience.In addition, another core of the present invention is for providing a kind of system that handles the multimedia file of Android mobile terminal.
In order to make those skilled in the art understand technical scheme of the present invention better, the present invention is described in further detail below in conjunction with the drawings and specific embodiments.
Please refer to Fig. 1 and Fig. 2, Fig. 1 is the process flow diagram of a kind of method of the multimedia file of handling the Android mobile terminal in an embodiment of the present invention; Fig. 2 is the process flow diagram of a kind of method of the multimedia file of handling the Android mobile terminal among the another kind of embodiment of the present invention.
As shown in Figure 1, a kind of method of handling the multimedia file of Android mobile terminal provided by the present invention comprises the steps:
S11: the breviary chart of the multimedia file in the traversal Android system database, set up the mapped function relation one by one of the thumbnail information of the ID of multimedia file and multimedia file, and this mapped function relation is stored in the memory cache;
S12: travel through the original chart of the multimedia file in the Android system database, obtain the file-related information that comprises ID of each multimedia file; Be example with the picture, its file-related information comprises ID, file path, size and creation-time.
S13: according to ID and the described mapped function relation of each multimedia file, coupling obtains the thumbnail information of multimedia file fast in memory cache, and presents to the user.
In technique scheme, " operation of 1+N secondary data library inquiry " is converted to " operation of 1+1 secondary data library inquiry adds internal memory operation N time ".And database query operations comes down to hard disk read operation that the data library file is carried out.And " internal memory reading speed " is " hard disk reading speed " 100000 times to 1000000 times, and we suppose that multiple is X, and then the time of 1 secondary data library inquiry operation consumption is designated as X, and the time of an internal memory operation consumption is designated as 1.
This programme with respect to the time consuming ratio of traditional scheme is:
(X+X+N*1)/((1+N) * X) ≈ 2/ (1+N) (wherein N is the multimedia file number)
And because the multimedia file of having introduced in this programme on the ID cache list mechanism detection user mobile phone changes, when the multimedia file on the user mobile phone did not have change, the time of consumption, still less the user experienced better.
Further, as shown in Figure 2, in another embodiment of the invention, also comprise the steps: after the step S13
S14: from the Android system database, obtain the current ID tabulation of multimedia file, and this current ID tabulation is compared with the ID tabulation in the memory cache, judge whether to change; If do not change, then turn to following step S15; If change, then turn to above-mentioned steps S11;
S15: notice is not upgraded, and directly the thumbnail information in the memory cache is presented to the user.
Be example with the picture, the content of ID cache list is all Image IDs in the Images table.The Image ID tabulation that last time of buffer memory in the tabulation of current Image ID and the internal memory is got access to compares, thereby judges whether picture has change (increasing newly/delete).
For example: all Image IDs in the current I mages table are that { 1,2,3,4}, last all Image IDs are that { 1,2,3} then has change.
Because whether it is very fast to obtain the speed of all Image IDs in the Images watch, change thereby can judge fast.Be example with the picture, when the user did not generate new photo or other pictures in mobile phone, we can directly notify upper procedure " data do not have change ".
Please refer to Fig. 3 and Fig. 4, Fig. 3 is for adopting the interaction figure of mobile terminal of the present invention HELPER APPLICATION; Fig. 4 is for adopting the sequential chart of mobile terminal of the present invention HELPER APPLICATION.
In this article, " key " of Hash table is the ID of each multimedia file, and " value " is corresponding picture thumbnail information/video thumbnails information/Music front cover information.By the cryptographic hash of multimedia file ID, can navigate to the picture thumbnail information/video thumbnails information/Music front cover information of multimedia file fast.Thereby essential information and " thumbnail/front cover " information of picture/video/music file are merged.
Be example with the picture file in the mobile phone, in the Android system database, store essential information and the thumbnail information of picture file by two tables respectively:
Images shows (that is original chart above)
Thumbnails shows (that is breviary chart above)
More than table is example.Show us by Images and can obtain the essential information that Image ID is 1 picture:
Image ID: 1
Picture file path :/sdcard/DCIM/100MEDIA/IMAG0009.jpg
Picture file size: 946974
And because we show Thumbnails among the whole Hashmap of being loaded into, as being " key " with " Image ID " in the Thumbnails table, be " value " with " thumbnail file path " in the Thumbnails table.Can think simply that the data among the Hashmap are:
1->/sdcard/DCIM/.thumbnails/1357723370385.jpg
2->/sdcard/DCIM/.thumbnails/1357723370415.jpg
Therefore we can to navigate to Image ID fast be that the thumbnail file path of 1 picture correspondence is/sdcard/DCIM/.thumbnails/1357723370385.jpg.This process has replaced database query operations by the quick matching operation in the internal memory.
We have obtained the complete information that Image ID is 1 picture like this:
Image ID: 1
Picture file path :/sdcard/DCIM/100MEDIA/IMAG0009.jpg
Picture file size: 946974
Thumbnail file path :/sdcard/DCIM/.thumbnails/1357723370385.jpg
As shown in Figure 4, in the present invention,
1, the mobile phone assistant calls at the interface interface that obtains the multimedia file tabulation that data middle layer provides, and indicates type in interface: picture/video/music;
2, data middle layer makes up the Tcp request msg according to communication protocol;
3, the network service layer connects (wifi connects or connects based on the adb forward of data line) by Tcp and sends the network request;
4, mobile phone end assistant Service receives android.provider.MediaStore inquiry specified type is called in Tcp request back by the mode shown in " (interaction figure among Fig. 3) " according to request content multimedia document information;
5, android.provider.MediaStore carries out the SQLite database query operations and returns Query Result;
6, mobile phone end assistant Service obtains current multimedia file ID tabulation, and with internal memory in the multimedia file ID tabulation that gets access to of last time of buffer memory compare, whether the multimedia file tabulation of judging specified type has renewal, as do not have to upgrade and return no_update message, otherwise obtain new multimedia file tabulation and return;
7, the network service layer is given data middle layer with the result transmission of mobile phone end assistant Service;
8, data middle layer is resolved the request results that gets access to from the network service layer, if once to obtain the multimedia file table data of the type and request results before be no_udpate then return to data before the mobile phone assistant interface; Otherwise resolve new multimedia file table data again and return to mobile phone assistant interface.
Because mobile phone end assistant Service application program is an Android service that is installed on the user mobile phone, when mobile phone power-on, should service starts voluntarily, and begin to obtain multimedia file tabulation (namely automatically performing the 4th among Fig. 3,5 steps).
In addition, the present invention also provides a kind of system that handles the multimedia file of Android mobile terminal, comprising:
The first traversal unit: be used for the breviary chart of the multimedia file of traversal Android system database, set up the mapped function relation one by one of the thumbnail information of the ID of multimedia file and multimedia file, and this mapped function relation is stored in the memory cache;
The second traversal unit: travel through the original chart of the multimedia file in the Android system database, obtain the file-related information that comprises ID of each multimedia file;
Quick matching unit: according to ID and the described mapped function relation of each multimedia file, coupling obtains the thumbnail information of multimedia file fast in memory cache, and presents to the user.
Further, this system also comprises:
Judging unit: from the Android system database, obtain the current ID of multimedia file tabulation, and ID tabulation that will be current compares with ID table in the memory cache, judge whether to change; If do not change, then turn to following step S15; If change, then turn to above-mentioned steps S11;
Direct display unit: notice is not upgraded, and directly the thumbnail information in the memory cache is presented to the user.
In addition, this system also comprises automatic acquiring unit: when the user opened mobile terminal equipment, the assistant service application program in the equipment of mobile terminal was just obtained the current ID tabulation of multimedia file automatically.
More than a kind of method and system of handling the multimedia file of Android mobile terminal provided by the present invention is described in detail.Used specific case herein principle of the present invention and embodiment are set forth, the explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof.Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of claim of the present invention.
Claims (10)
1. a method of handling the multimedia file of Android mobile terminal is characterized in that, comprises the steps:
S11: the breviary chart of the multimedia file in the traversal Android system database, set up the mapped function relation one by one of the thumbnail information of the ID of multimedia file and multimedia file, and this mapped function relation is stored in the memory cache;
S12: travel through the original chart of the multimedia file in the Android system database, obtain the file-related information that comprises ID of each multimedia file;
S13: according to ID and the described mapped function relation of each multimedia file, coupling obtains the thumbnail information of multimedia file fast in memory cache, and presents to the user.
2. a kind of method of handling the multimedia file of Android mobile terminal as claimed in claim 1 is characterized in that, also comprises the steps: after the step S13
S14: from the Android system database, obtain the current ID tabulation of multimedia file, and this current ID tabulation is compared with the ID tabulation in the memory cache, judge whether to change; If do not change, then turn to following step S15; If change, then turn to above-mentioned steps S11;
S15: notice is not upgraded, and directly the thumbnail information in the memory cache is presented to the user.
3. a kind of method of handling the multimedia file of Android mobile terminal as claimed in claim 2 is characterized in that, when the user opened mobile terminal equipment, the assistant service application program in the equipment of mobile terminal was just obtained the current I D tabulation of multimedia file automatically.
4. as each described a kind of method of handling the multimedia file of Android mobile terminal of claim 1-3, it is characterized in that described mapped function relation is stored in the memory cache of mobile terminal equipment.
5. as each described a kind of method of handling the multimedia file of Android mobile terminal of claim 1-3, it is characterized in that described mapped function relation is kept in the memory cache of the PC end that is connected with mobile terminal equipment.
6. as each described a kind of method of handling the multimedia file of Android mobile terminal of claim 1-3, it is characterized in that described mapped function relation is Hash table or sparse array.
7. a system that handles the multimedia file of Android mobile terminal is characterized in that, comprising:
The first traversal unit: be used for the breviary chart of the multimedia file of traversal Android system database, set up the mapped function relation one by one of the thumbnail information of the ID of multimedia file and multimedia file, and this mapped function relation is stored in the memory cache;
The second traversal unit: travel through the original chart of the multimedia file in the Android system database, obtain the file-related information that comprises ID of each multimedia file;
Quick matching unit: according to ID and the described mapped function relation of each multimedia file, coupling obtains the thumbnail information of multimedia file fast in memory cache, and presents to the user.
8. a kind of system that handles the multimedia file of Android mobile terminal as claimed in claim 7 is characterized in that, also comprises:
Judging unit: from the Android system database, obtain the current ID of multimedia file tabulation, and ID tabulation that will be current compares with ID table in the memory cache, judge whether to change; If do not change, then turn to following step S15; If change, then turn to above-mentioned steps S11;
Direct display unit: notice is not upgraded, and directly the thumbnail information in the memory cache is presented to the user.
9. a kind of system that handles the multimedia file of Android mobile terminal as claimed in claim 8 is characterized in that, also comprises:
Automatic acquiring unit: when the user opened mobile terminal equipment, the assistant service application program in the equipment of mobile terminal was just obtained the current ID tabulation of multimedia file automatically.
10. a kind of system that handles the multimedia file of Android mobile terminal as claimed in claim 7 is characterized in that described file-related information comprises ID, file path, size and creation-time.
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| CN111901684A (en) * | 2020-07-30 | 2020-11-06 | 深圳市康冠科技股份有限公司 | File classification method and related device |
| CN112100131A (en) * | 2020-09-24 | 2020-12-18 | 深圳软牛科技有限公司 | Thumbnail extraction method and device in android system and electronic equipment |
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