I am trying to upload file from android sdcard to FTP Web server. For

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Asked: May 22, 20262026-05-22T22:34:08+00:00 2026-05-22T22:34:08+00:00

I am trying to upload file from android sdcard to FTP Web server. For

0

I am trying to upload file from android sdcard to FTP Web server. For this i am using Apache FTPClient library.
Here is my code to upload file …

FTPClient con = new FTPClient();
                try
                {                       
                    con.connect("host ip",21);

                    int reply = con.getReplyCode();

                    if (!FTPReply.isPositiveCompletion(reply))
                    {
                        con.disconnect();
                        System.err.println("FTP server refused connection.");
                        System.exit(1);
                    }else{
                        System.err.println("FTP server connected");                         
                    }

                    if (con.login("username", "password"))
                    {
                        con.enterLocalPassiveMode(); // important!

                        FileInputStream in = new FileInputStream("/mnt/sdcard/xmls/" + fileName);


                        boolean result = con.storeFile("/"+filename, in);

                        if (result){
                            Toast.makeText(DisplaySDCardContent.this, "File Uploaded Successfully.", Toast.LENGTH_LONG).show();
                            Log.v("upload result", "succeeded");
                        }

                        in.close();
                    }
                }

While try to upload file … i am getting exception that says bad file number .. socket exception…

    05-28 17:31:18.097: WARN/System.err(30486): java.net.SocketException: Bad file number
05-28 17:31:18.097: WARN/System.err(30486):     at org.apache.harmony.luni.platform.OSNetworkSystem.writeSocketImpl(Native Method)
05-28 17:31:18.107: WARN/System.err(30486):     at org.apache.harmony.luni.platform.OSNetworkSystem.write(OSNetworkSystem.java:723)
05-28 17:31:18.107: WARN/System.err(30486):     at org.apache.harmony.luni.net.PlainSocketImpl.write(PlainSocketImpl.java:578)
05-28 17:31:18.107: WARN/System.err(30486):     at org.apache.harmony.luni.net.SocketOutputStream.write(SocketOutputStream.java:59)
05-28 17:31:18.107: WARN/System.err(30486):     at java.io.BufferedOutputStream.flushInternal(BufferedOutputStream.java:224)
05-28 17:31:18.107: WARN/System.err(30486):     at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:113)
05-28 17:31:18.117: WARN/System.err(30486):     at java.io.FilterOutputStream.flush(FilterOutputStream.java:88)
05-28 17:31:18.117: WARN/System.err(30486):     at java.io.FilterOutputStream.close(FilterOutputStream.java:61)
05-28 17:31:18.117: WARN/System.err(30486):     at org.apache.commons.net.ftp.FTPClient.__storeFile(FTPClient.java:582)
05-28 17:31:18.117: WARN/System.err(30486):     at org.apache.commons.net.ftp.FTPClient.storeFile(FTPClient.java:1702)
05-28 17:31:18.127: WARN/System.err(30486):     at com.mnp.webmanager.DisplaySDCardContent$2.onClick(DisplaySDCardContent.java:116)
05-28 17:31:18.127: WARN/System.err(30486):     at android.view.View.performClick(View.java:2408)
05-28 17:31:18.127: WARN/System.err(30486):     at android.view.View$PerformClick.run(View.java:8816)
05-28 17:31:18.127: WARN/System.err(30486):     at android.os.Handler.handleCallback(Handler.java:587)
05-28 17:31:18.127: WARN/System.err(30486):     at android.os.Handler.dispatchMessage(Handler.java:92)
05-28 17:31:18.127: WARN/System.err(30486):     at android.os.Looper.loop(Looper.java:123)
05-28 17:31:18.127: WARN/System.err(30486):     at android.app.ActivityThread.main(ActivityThread.java:4627)
05-28 17:31:18.127: WARN/System.err(30486):     at java.lang.reflect.Method.invokeNative(Native Method)
05-28 17:31:18.137: WARN/System.err(30486):     at java.lang.reflect.Method.invoke(Method.java:521)
05-28 17:31:18.137: WARN/System.err(30486):     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:868)
05-28 17:31:18.137: WARN/System.err(30486):     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:626)
05-28 17:31:18.137: WARN/System.err(30486):     at dalvik.system.NativeStart.main(Native Method)

i stuck here and passed a lot time to solve this but no solution yet i found.
Please help with this .
thanks.