File download method and apparatus

Abstract

The invention provides a file download method and apparatus. The file download method comprises the steps of sending a download request to a server; receiving an identifier indicating whether a to-be-downloaded file supports multi-thread download returned from the server according to the download request; and if the identifier returned from the server indicates that the to-be-downloaded file supports multi-thread download, starting multiple threads to download the to-be-downloaded file. According to the file download method, the download time of the to-be-downloaded file is shortened, and fewer idle thread resources are wasted.

Description

technical field [0001] The invention relates to the technical field of network communication, in particular to a file downloading method and device. Background technique [0002] In the actual project, it is found that the speed and performance of downloading files using the native download technology of the android operating system are not satisfactory. [0003] At present, there are mainly three mainstream download methods for Android that are used more: [0004] (1), the reading and writing mode download of file stream, the InputStream (input stream) that connects URL (Uniform Resource Locator) reads data while writing in the local memory file of Android; (2), use the DownloadManager that Android comes with (Download Manager) realizes downloading; (3), multi-thread downloading technology. [0005] The main defects of these three mainstream download methods are as follows: [0006] (1), the method of downloading by the mode of file stream reading and writing, downloadin...

AI Technical Summary

Problems solved by technology

[0006] (1), the method of downloading by the mode of file stream reading and writing, downloading speed is very slow, takes a long time, is not suitable for downloading of large files, and the phenomenon of ANR (application not responding) appears easily;

[0007] (2), DownloadManager (download manager) appears in API9 (Application Programming Interface) and later Android versions, the download principle is simple, but there are also problems of slow download speed and low performance;

[0009] The disadvantage of this solution is: it is possible that the length of the file is not enough to be equally distributed to each thread, and some threads will have heavy tasks and take a long time to execute, resulting in a long overall download time; it may also occur that the execution speed of each thread is not Equally, some threads are very fast and have already finished executing, but need to wait for the slowest thread. In actual projects, we have encountered that the file has not been able to be downloaded because of a thread freeze or suspended animation. The situation makes the overall download time longer, the download speed is slow, and even the download task cannot be completed.

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