CN108566417A - A kind of multithread breakpoint continued transmission download system based on android system and method - Google Patents
A kind of multithread breakpoint continued transmission download system based on android system and method Download PDFInfo
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- CN108566417A CN108566417A CN201810242095.6A CN201810242095A CN108566417A CN 108566417 A CN108566417 A CN 108566417A CN 201810242095 A CN201810242095 A CN 201810242095A CN 108566417 A CN108566417 A CN 108566417A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/06—Protocols specially adapted for file transfer, e.g. file transfer protocol [FTP]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/10—Protocols in which an application is distributed across nodes in the network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/34—Network arrangements or protocols for supporting network services or applications involving the movement of software or configuration parameters
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Abstract
The invention discloses a kind of multithread breakpoint continued transmission download systems based on android system, including background service module, task download module, thread download module, database module and message notification module；Background service module is for opening initial thread, and Initialize installation is carried out to task download module in initial thread, background service module is connected with task download module, task download module, which is used to determine the related data of downloading task and opens multithreading by thread download module, carries out file download, and task download module is connected with thread download module；Database module is then used to periodically carry out interface refreshing for recording download progress, message notification module in real time, and database module is connected with task download module, thread download module and message notification module respectively.Mainly by thread pool, SQLite is realized the present invention, ready-made download service can be directly invoked when needing download function, to be absorbed in the quick exploitation of business, reduces human time's cost.
Description
Technical field
The present invention relates to mobile internet technical field, more particularly to a kind of multithreading breakpoint based on android system is continuous
Descend loading system and method.
Background technology
Android has captured most of Mobile Market as one of two big mobile platforms.With mobile interchange in internet foundation
The net impetus is most strong, and all kinds of app emerge one after another.Wherein, video, music class app are necessarily required to support multitask while download, and
In most of frame, similar functions are not provided, its development cycle and cost is caused to be increased, perhaps therefore miss business hair
The good chance of exhibition.
Invention content
It is insufficient in above-mentioned background technology the purpose of the present invention is overcoming, it is disconnected to provide a kind of multithreading based on android system
Point resumes download system and method, and mainly by thread pool, SQLite is realized, can be directly invoked when needing download function
Ready-made download service reduces human time's cost to be absorbed in the quick exploitation of business.
In order to reach above-mentioned technique effect, the present invention takes following technical scheme：
A kind of multithread breakpoint continued transmission download system based on android system, including background service module, task download mould
Block, thread download module, database module and message notification module；
The background service module carries out just task download module in initial thread for opening initial thread
Beginningization is arranged, and background service module is connected with task download module, and task download module is used to determine the dependency number of downloading task
Multithreading is opened according to and by thread download module and carries out file download, and task download module is connected with thread download module；
The database module is then used to periodically carry out interface brush for recording download progress, message notification module in real time
Newly, database module is connected with task download module, thread download module and message notification module respectively；
Wherein, background service module is to operate in backstage, database mould using the service in Android as prototype
Block is then the helper classes with SQLiteOperHelper, is preserved to interface is recordable to tables of data for connecting database
Concrete operations, such as increase, delete, change, look into, task download module, which is mainly responsible for, initializes related data and timed task, under thread
Load module, which is then mainly responsible for, completes downloading task, and message notification module, which is mainly responsible for, to be received different notification messages and use
NotificationManager realizes notice display, cancels, update progress bar and according to the status display of downloading task
Different prompt words, such as pause in, failed download；
When the multithread breakpoint continued transmission download system work based on android system, mainly：First opened by user
Downloading task, suspended task, the operation for deleting task, wherein user carries out background service module being called to pass when any operation
Enter corresponding parameter；Then, background service module opens initial thread by thread pool, then connects network file by initial thread
Judge the feasibility of downloading task, and thus sends failed download to the handler of service or download and start message；
It is sent and is downloaded by message notification module if the message that the handler of background service module receives failed download
Failure is broadcasted, and the flow terminates；
It is received if the handler of background service module and starts task download module if download starts message and to database
Middle downloading task tables of data is inserted into data；
Whether task download module has corresponding data to the inquiry of database thread tables of data first after being activated, and does not have
It then creates multiple thread-datas and is inserted into thread-data table；
Then start multiple download threads according to these thread-datas, and start timed task, it is every to pass through message within n seconds
Notification module, which is sent, downloads update broadcast.
Meanwhile system is downloaded based on above-mentioned multithread breakpoint continued transmission based on android system the invention also discloses a kind of
The multithread breakpoint continued transmission method for down loading of system, specifically comprises the steps of：
S1. background service module opens initial thread, and the initialization task in initial thread in a manner of background service
Download module determines the related data of downloading task；
S2. multithreading is opened by thread download module and carries out file download；
S3. database module records the download progress in the step S2 in real time, and passes through message notification module
Timing carries out interface refreshing.
Further, also include：
S4. when user suspends or terminates current downloading task, database module records current download progress and preserves
Downloading data；
S5. when user restores to download, task download module and thread download module are according under database module record
Degree of being loaded into continues downloading task.
Further, in the step S1 background service module opened in a manner of background service it is specific when initial thread
It comprises the steps of：
S110. background service module, which opens initial thread by thread pool and connects network, obtains high in the clouds file size；
S111. background service module judges whether the data that the high in the clouds received returns are correct；
If the error in data that the high in the clouds S112. received returns, background service module send out failed download to handler
Message, handler receives the notice for sending out failed download after failed download message by message notification module；
If the data that the high in the clouds S113. received returns are correct, background service module further judges that path is locally-downloaded
It whether there is, there is no then create related download path and enter step S15；
S114. background service module is localling create file setting download length, and starts to download to handler returns
Message；
After S115.handler receives message, downloading task is added to database module and is opened with background service module
It downloads, while the notice downloaded and started is sent out by message notification module.
Further, the downloading task tables of data for recording downloading data is equipped in the database module, described
In step S115, handler is specially the downloading task number into database module when downloading task is added to database module
It is inserted into downloading data corresponding with this downloading task according to addition in table.
Further, the thread-data table that situation is downloaded for recording each thread, step are equipped in the database module
In S1：Background service module specifically comprises the steps of in initial thread when initialization task download module：
S120. data in task download module inquiry thread-data table, judge that related linear program information whether there is；
S121. if related linear program information is not present, task download module if, calculates single thread and downloads length and create
Each thread information, then each thread information created is inserted into thread-data table；
If related linear program information exists, multiple download threads are started into style of writing by thread pool if task download module
Part is downloaded；
S123. start timed task, task download module was sent to message notification module comprising download update number per n seconds
According to message, and download progress is updated by message notification module, wherein the download update the data including download progress and
Downloading rate.
Further, also include following step when the step S2 thread download modules open multithreading progress file download
Suddenly：
S21. thread download module, which is opened after multithreading carries out file download, is arranged resource downloading range on the URL of high in the clouds, and
Local file writing position is set；
S22. thread download module starts to download, and reads downloading data and local file is written；
If S23. user suspends current downloading task, stop downloading, updates data in thread-data table, pass through message
Notification module sends the message for downloading pause；
If S24. current downloading task failure, by the download progress of the corresponding data item in thread-data table and download
Rate empties, and the message of failed download is sent by message notification module；
If S25. current downloading task is completed, check whether all download threads of this downloading task are all completed, if
It is to delete thread-data table corresponding data, updates downloading task tables of data corresponding data, sent down by message notification module
Carry the message completed.
Compared with prior art, the present invention having advantageous effect below：
The present invention has multitask while downloading the Android APP of demand for part, innovatively proposes one kind and is based on
It is that multithreading is realized, support the method for down loading of breakpoint transmission, and detached as an independent module, when use only needs
Correlation module is integrated in Android APP, you can directly invoke correlation technique and be downloaded task, convenient for safeguarding, simultaneously.
A variety of flexible downloading modes also are provided to Android APP developers, reduce the development cost of download module.
Description of the drawings
Fig. 1 be the present invention multithread breakpoint continued transmission method for down loading in start download before step flow diagram.
Fig. 2 be the present invention multithread breakpoint continued transmission method for down loading in start download after step flow diagram.
Specific implementation mode
With reference to the embodiment of the present invention, the invention will be further elaborated.
Embodiment：
Embodiment one：
A kind of multithread breakpoint continued transmission download system based on android system, including background service module, task download mould
Block, thread download module, database module and message notification module.
The background service module carries out just task download module in initial thread for opening initial thread
Beginningization is arranged, and background service module is connected with task download module, and task download module is used to determine the dependency number of downloading task
Multithreading is opened according to and by thread download module and carries out file download, and task download module is connected with thread download module；
The database module is then used to periodically carry out interface brush for recording download progress, message notification module in real time
Newly, database module is connected with task download module, thread download module and message notification module respectively；
Wherein, background service module is to operate in backstage, database mould using the service in Android as prototype
Block is then to be preserved to interface is recordable to data using the helper of SQLiteOperHelper as prototype for connecting database
The concrete operations of table, such as increase, delete, change, look into, task download module is mainly responsible for initialization related data and timed task, line
Journey download module, which is then mainly responsible for, completes downloading task, and message notification module, which is mainly responsible for, to be received different notification messages and use
NotificationManager realizes notice display, cancels, update progress bar and according to the status display of downloading task
Different prompt words, such as pause in, failed download.
When the multithread breakpoint continued transmission download system based on android system work of the present invention, mainly：First by user into
Row opens downloading task, suspended task, the operation for deleting task, wherein user carries out calling background service when any operation
The incoming corresponding parameter of module；Then, background service module opens initial thread by thread pool, then connects net by initial thread
Network file judges the feasibility of downloading task, and thus sends failed download to the handler of service or download and start message；
It is sent and is downloaded by message notification module if the message that the handler of background service module receives failed download
Failure is broadcasted, and the flow terminates；
It is received if the handler of background service module and starts task download module if download starts message and to database
Middle downloading task tables of data is inserted into data；
Whether task download module has corresponding data to the inquiry of database thread tables of data first after being activated, and does not have
It then creates multiple thread-datas and is inserted into thread-data table；
Then start multiple download threads according to these thread-datas, and start timed task, it is every to pass through message within n seconds
Notification module, which is sent, downloads update broadcast.
Embodiment two：
A kind of multithread breakpoint continued transmission method for down loading of the multithread breakpoint continued transmission download system based on embodiment one, tool
Body comprises the steps of：
S1. background service module opens initial thread, and the initialization task in initial thread in a manner of background service
Download module determines the related data of downloading task；
S2. multithreading is opened by thread download module and carries out file download；
S3. database module records the download progress in the step S2 in real time, and passes through message notification module
Timing carries out interface refreshing；
S4. when user suspends or terminates current downloading task, database module records current download progress and preserves
Downloading data；
S5. when user restores to download, task download module and thread download module are according under database module record
Degree of being loaded into continues downloading task.
As shown in Figure 1, before starting download, when background service module opens initial thread in a manner of background service, specifically
It comprises the steps of：
S110. background service module, which opens initial thread by thread pool and connects network, obtains high in the clouds file size；
S111. background service module judges whether the data that the high in the clouds received returns are correct；
If the error in data that the high in the clouds S112. received returns, background service module send out failed download to handler
Message, handler receives the notice for sending out failed download after failed download message by message notification module；
If the data that the high in the clouds S113. received returns are correct, background service module further judges that path is locally-downloaded
It whether there is, there is no then create related download path and enter step S15；
S114. background service module (mainly uses RandomAccessFile random access text localling create file
Part class, this strings together the file that each thread is downloaded after being the key that) length is downloaded in setting, and is opened to handler returns
Begin the message downloaded；
After S115.handler receives message, downloading task is added to database module and is opened with background service module
It downloads, while the notice downloaded and started is sent out by message notification module.
Wherein, the downloading task tables of data for recording downloading data is equipped in the database module, in the step
In S115, handler is specially the downloading task tables of data into database module when downloading task is added to database module
Downloading data corresponding with this downloading task is inserted into middle addition.
Specifically, downloading situation for recording each thread as shown in Fig. 2, being equipped with when downloading, in the database module
Thread-data table, and background service module specifically comprises the steps of in initial thread when initialization task download module：
S120. data in task download module inquiry thread-data table, judge that related linear program information whether there is；
S121. if related linear program information is not present, task download module if, calculates single thread and downloads length and create
Each thread information, then each thread information created is inserted into thread-data table；
If related linear program information exists, multiple download threads are started into style of writing by thread pool if task download module
Part is downloaded；
S123. start timed task, task download module was sent to message notification module comprising download update number per n seconds
According to message, and download progress is updated by message notification module, wherein the download update the data including download progress and
Downloading rate.
Wherein, it when thread download module opens multithreading progress file download, also comprises the steps of：
S21. thread download module, which is opened after multithreading carries out file download, is arranged resource downloading range on the URL of high in the clouds, and
Local file writing position is set；
S22. thread download module starts to download, and reads downloading data and local file is written；
If S23. user suspends current downloading task, stop downloading, updates data in thread-data table, pass through message
Notification module sends the message for downloading pause；
If S24. current downloading task failure, by the download progress of the corresponding data item in thread-data table and download
Rate empties, and the message of failed download is sent by message notification module；
If S25. current downloading task is completed, check whether all download threads of this downloading task are all completed, if
It is to delete thread-data table corresponding data, updates downloading task tables of data corresponding data, sent down by message notification module
Carry the message completed.
It therefore, must when the multithread breakpoint continued transmission method for down loading of the present invention is in the operation changed to downloading task state
Background service module must be called to be passed to specific parameter, and user is needing the registrations such as activity, fragment of update ui
Specific broadcast, to receive different broadcast messages, each broadcast message can receive specific data, meanwhile, it is serviced calling
When can be passed to many kinds of parameters and reach custom effect, and call service after Android interior generations specific data table guarantor is locally stored
Deposit thread download progress.
And can will download flow in the multithread breakpoint continued transmission method for down loading of the present invention and be abstracted into a download module,
The duplicated code in exploitation, the exploitation of the more absorbed business module of developer is avoided to reduce development cost.
Meanwhile also a download file can be divided into polylith to multiple threads while downloaded, and will be more when downloading and completing
A fragment is connected as a download file.And also thread is downloaded into the multithread breakpoint continued transmission method for down loading of the present invention
Degree is saved into database in real time, when download is again started up download after being interrupted or paused, under being continued according to the progress of preservation
It carries, to realize the function of breakpoint transmission.
It is understood that the principle that embodiment of above is intended to be merely illustrative of the present and the exemplary reality that uses
Mode is applied, however the present invention is not limited thereto.For those skilled in the art, the present invention is not being departed from
Spirit and essence in the case of, various changes and modifications can be made therein, these variations and modifications be also considered as the present invention protection
Range.
Claims (7)
1. a kind of multithread breakpoint continued transmission download system based on android system, which is characterized in that comprising background service module, appoint
Business download module, thread download module, database module and message notification module；
Wherein, the background service module is for opening initial thread, and is carried out just to task download module in initial thread
Beginningization is arranged, and background service module is connected with task download module, and task download module is used to determine the dependency number of downloading task
Multithreading is opened according to and by thread download module and carries out file download, and task download module is connected with thread download module；
The database module is then used to periodically carry out interface refreshing, number for recording download progress, message notification module in real time
It is connected respectively with task download module, thread download module and message notification module according to library module.
2. a kind of multithreading breakpoint based on multithread breakpoint continued transmission download system based on android system described in claim 1
Resume method for down loading, which is characterized in that specifically comprise the steps of：
S1. background service module opens initial thread in a manner of background service, and initialization task is downloaded in initial thread
Module determines the related data of downloading task；
S2. multithreading is opened by thread download module and carries out file download；
S3. database module records the download progress in the step S2 in real time, and passes through message notification module timing
Carry out interface refreshing.
3. multithread breakpoint continued transmission method for down loading according to claim 2, which is characterized in that also include：
S4. when user suspends or terminates current downloading task, under database module records current download progress and preserves
Carry data；
S5. when user restores to download, task download module and thread download module are downloaded into according to what database module recorded
Degree continues downloading task.
4. multithread breakpoint continued transmission method for down loading according to claim 2, which is characterized in that taken from the background in the step S1
Business module specifically comprises the steps of when opening initial thread in a manner of background service：
S110. background service module, which opens initial thread by thread pool and connects network, obtains high in the clouds file size；
S111. background service module judges whether the data that the high in the clouds received returns are correct；
If the error in data that the high in the clouds S112. received returns, background service module send out disappearing for failed download to handler
Breath, handler receive the notice for sending out failed download after failed download message by message notification module；
If the data that the high in the clouds S113. received returns are correct, background service module further judges path is locally-downloaded whether
In the presence of there is no then create related download path and enter step S15；
S114. background service module is localling create file setting download length, and is returned to handler and start disappearing for download
Breath；
After S115.handler receives message, downloading task is added to database module and is opened with background service module and is downloaded,
The notice downloaded and started is sent out by message notification module simultaneously.
5. multithread breakpoint continued transmission method for down loading according to claim 4, which is characterized in that set in the database module
It is useful for the downloading task tables of data of record downloading data, in the step S115, downloading task is added to data by handler
Addition is inserted into corresponding with this downloading task in downloading task tables of data when library module specially into database module
Downloading data.
6. multithread breakpoint continued transmission method for down loading according to claim 5, which is characterized in that set in the database module
It is useful for recording the thread-data table that each thread downloads situation, in step S1：Background service module initializes in initial thread
It is specifically comprised the steps of when task download module：
S120. data in task download module inquiry thread-data table, judge that related linear program information whether there is；
S121. if related linear program information is not present, task download module if, calculates single thread and downloads length and create each
Thread information, then each thread information created is inserted into thread-data table；
Start multiple download threads by thread pool if related linear program information exists, if task download module to carry out under files
It carries；
S123. start timed task, task download module was sent per n seconds to message notification module to disappear comprising what download updated the data
Breath, and download progress is updated by message notification module, wherein the download updates the data including download progress and downloads speed
Rate.
7. multithread breakpoint continued transmission method for down loading according to claim 6, which is characterized in that the step S2 threads are downloaded
When module opens multithreading progress file download, also comprise the steps of：
S21. thread download module, which is opened after multithreading carries out file download, is arranged resource downloading range on the URL of high in the clouds, and is arranged
Local file writing position；
S22. thread download module starts to download, and reads downloading data and local file is written；
If S23. user suspends current downloading task, stop downloading, updates data in thread-data table, pass through message informing mould
Block sends the message for downloading pause；
If S24. current downloading task failure, clear by the download progress of the corresponding data item in thread-data table and downloading rate
Sky, and pass through the message of message notification module transmission failed download；
If S25. current downloading task is completed, check whether all download threads of this downloading task are all completed, if so, deleting
Except thread-data table corresponding data, downloading task tables of data corresponding data is updated, sends to download by message notification module and complete
Message.
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Application publication date: 20180921 |