Android FTP listfiles () is always 0

This is because you need to obtain the size of the file to be downloaded in advance to implement multi-threaded FTP download of the same file,

First obtain the file list through listfiles () and then the file size. The Code is as follows:

Ftpfile [] files = ftpclient. listfiles ();

For (INT I = 0; I <files. length; I ++ ){
Ftpfile file = files [I];
String filename = file. getname ();
If (filename. Equals (remotefilename )){
Size = file. getsize ();
}
}

However, when listfiles () is called, the obtained file list is always 0! Because Android cannot establish FTP connect in the main thread. Listfiles () called in the Child thread ()
.

I searched for resources on the Internet and watched datasheet. It never solved the problem.

Found this article: https://issues.apache.org/jira/browse/NET-190

This function is also found in Datasheet,

public FTPListParseEngine initiateListParsing(String parserKey,String pathname)throws IOException

So I tried it and it succeeded!

The Code is as follows:

Ftplistparseengine engine = ftpclient. initiatelistparsing ("org.apache.commons.net. FTP. parser. unixftpentryparser", remotepath );

Ftpfile [] files = engine. getfiles ();