FTP connection problem, connection exception

1public FTPClient mFTPClient = null;
2
3 private String username = "user";
4 private String password = "password";
5 private String ftpServer = "10.0.2.2";
6 private Integer ftpPort = 21;

1public boolean ftpConnect(String host, String username,
2 String password, int port)
3 {
4 try {
5 mFTPClient = new FTPClient();
6 // connecting to the host
7 mFTPClient.connect(host, port);
8
9 // now check the reply code, if positive mean connection success
10 if (FTPReply.isPositiveCompletion(mFTPClient.getReplyCode())) {
11 // login using username & password
12 boolean status = mFTPClient.login(username, password);
13
14 /* Set File Transfer Mode
15 *
16 * To avoid corruption issue you must specified a correct
17 * transfer mode, such as ASCII_FILE_TYPE, BINARY_FILE_TYPE,
18 * EBCDIC_FILE_TYPE .etc. Here, I use BINARY_FILE_TYPE
19 * for transferring text, image, and compressed files.
20 */
21 mFTPClient.setFileType(FTP.BINARY_FILE_TYPE);
22 mFTPClient.enterLocalPassiveMode();
23
24 return status;
25 }
26 } catch(Exception e) {
27 System.out.println("Exception connecting to FTP server:" + e);
28 }
29
30 return false;
31 }
32 /* Method to disconnect from FTP server */
33 public boolean ftpDisconnect()
34 {
35 try {
36 mFTPClient.logout();
37 mFTPClient.disconnect();
38 return true;
39 } catch (Exception e) {
40 System.out.println("Exception disconnecting from FTP server:" + e);
41 }
42
43 return false;
44 }
45 /* Method to get current working directory */
46 public String ftpGetCurrentWorkingDirectory()
47 {
48 try {
49 String workingDir = mFTPClient.printWorkingDirectory();
50 return workingDir;
51 } catch(Exception e) {
52 System.out.println("Exception getting current working directory:" + e);
53 }
54
55 return null;
56 }
57
58public boolean ftpDownload(String srcFilePath, String desFilePath)
59 {
60 boolean status = false;
61 try {
62 //FileOutputStream desFileStream = new FileOutputStream(desFilePath);
63 FileOutputStream desFileStream = openFileOutput(desFilePath, Context.MODE_PRIVATE);
64
65 status = mFTPClient.retrieveFile(srcFilePath, desFileStream);
66 desFileStream.close();
67
68 return status;
69 } catch (Exception e) {
70 System.out.println("download failed: "+e);
71 }
72
73 return status;
74 }

1private class DownloadFileFromFTP extends AsyncTask<String, Void, String> {
2
3 @Override
4 protected String doInBackground(String... empty) {
5 String strResponce = "";
6
7 Boolean connectStatus = ftpConnect(ftpServer, username,
8 password, ftpPort);
9 if (connectStatus == true){
10 String src = ftpGetCurrentWorkingDirectory().toString()+"/ftpserverfile.txt";
11 String dest = "ftpserverfile.txt";
12
13 ftpPrintFilesList(ftpGetCurrentWorkingDirectory());
14 System.out.println("Downloading "+src+" to "+dest);
15 Boolean ftpDownloadStatus = ftpDownload(src, dest);
16
17 if (ftpDownloadStatus == true){
18 strResponce = "true";
19 }
20 else{
21 strResponce = "false";
22 }
23 }
24 ftpDisconnect();
25
26 return strResponce;
27 }
28 @Override
29 protected void onPostExecute(String result) {
30
31 }}