Java Apache Mina FTP Server import libraries

Question

I want to create an Android FTP Server App with the Apache Mina FTP Server.

The problem is the following: I can't import these libraries.

I can select between two errors:

If the libs aren't selected in "Java Build Path"/"Order and Export", I get this error:

"Could not find class 'org.apache.ftpserver.FtpServerFactory' (...)" 

(Logcat)

If they are selected, I get this error:

Conversion to Dalvik format failed: 
Unable to execute dex: 
Multiple dex files define Lorg/apache/ftpserver/ftplet/FtpException;

(Problems / Errors)

What's wrong??

My imported libraries:

ftplet-api-1.0.6.jar
ftpserver-core-1.0.6.jar
mina-core-2.0.4.jar (or 2.0.7)
slf4j-api-1.5.2.jar (or 1.6.6)
slf4j-simple-1.5.3.jar

Check this. http://stackoverflow.com/questions/7870265/unable-to-execute-dex-multiple-dex-files-define-lcom-myapp-rarray — Alkis Kalogeris, Jun 21 '14 at 13:57
Thanks for the link but none of these many tips could help me.. — Jan Knoblauch, Jun 22 '14 at 15:58
ftplet-api-1.0.6.jar ftpserver-core-1.0.6.jar Are these two supposed to be used in the same project? — Alkis Kalogeris, Jun 22 '14 at 16:24
Yes, I used the files listed in the tutorial [mina.apache.org](https://mina.apache.org/ftpserver-project/embedding_ftpserver.html) — Jan Knoblauch, Jun 23 '14 at 05:21
Haven't programmed in android, but maybe this `ftplet-api-1.0.6.jar` is already available? Remove it and try again. — Alkis Kalogeris, Sep 13 '14 at 20:33

score 3 · Accepted Answer · answered May 05 '16 at 15:49

3

I have the same issue with any android project when I add jCenter dependency on org.apache.ftpserver:ftpserver-core:1.0.6. Project compiles successfully, but it fails when I try to start it.

I realized, that ftpserver-core-1.0.6.jar contains classes from ftplet-api-1.0.6.jar.

To fix the issue, I used local libraries, but deleted ftplet-api-1.0.6.jar. I am not sure that it is totally correct solution, but it works for me.

answered May 05 '16 at 15:49

Evgeni Lipatov

326
3
12

1

Thanks for the answer! I had the same problem and this fix worked for me too. What I did was to exclude the ftplet-api-1.0.6 in my build.gradle: `dependencies { ... compile('org.apache.ftpserver:ftpserver-core:1.0.6') { exclude group: 'org.apache.ftpserver', module: 'ftplet-api' } ... }` – Andrei Micu Nov 21 '17 at 05:33

Java Apache Mina FTP Server import libraries

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