Here's the solution I ended up using.
import android.os.Environment;
import com.jcraft.jsch.*;
import java.io.*;
/**
*
* @author ayokunle
*/
public class ServerIO {
public static void main(String[] arg){
ServerIO x = new ServerIO();
}
boolean getFile(String [] arg, String UserDetails){
if(arg.length!=2){
System.err.println("usage: java ScpFrom user@remotehost:file1 file2");
System.exit(-1);
}
FileOutputStream fos=null;
try{
String user=arg[0].substring(0, arg[0].indexOf('@'));
arg[0]=arg[0].substring(arg[0].indexOf('@')+1);
String host=arg[0].substring(0, arg[0].indexOf(':'));
String rfile="webspace/Shield/" + UserDetails;
String lfile= UserDetails;
String prefix=null;
File root = new File(Environment.getExternalStorageDirectory(), "Notes");
if(new File(root, lfile).isDirectory()){
prefix=lfile+File.separator;
}
JSch jsch=new JSch();
Session session=jsch.getSession(user, host, 22);
// username and password will be given via UserInfo interface.
UserInfo ui=new MyUserInfo();
session.setUserInfo(ui);
session.connect();
// exec 'scp -f rfile' remotely
String command="scp -f "+rfile;
Channel channel=session.openChannel("exec");
((ChannelExec)channel).setCommand(command);
// get I/O streams for remote scp
OutputStream out=channel.getOutputStream();
InputStream in=channel.getInputStream();
channel.connect();
byte[] buf=new byte[1024];
// send '\0'
buf[0]=0; out.write(buf, 0, 1); out.flush();
while(true){
int c=checkAck(in);
if(c!='C'){
break;
}
// read '0644 '
in.read(buf, 0, 5);
long filesize=0L;
while(true){
if(in.read(buf, 0, 1)<0){
// error
break;
}
if(buf[0]==' ')break;
filesize=filesize*10L+(long)(buf[0]-'0');
}
String file=null;
for(int i=0;;i++){
in.read(buf, i, 1);
if(buf[i]==(byte)0x0a){
file=new String(buf, 0, i);
break;
}
}
// send '\0'
buf[0]=0; out.write(buf, 0, 1); out.flush();
// read a content of lfile
fos=new FileOutputStream(prefix==null ? lfile : prefix+file);
int foo;
while(true){
if(buf.length<filesize) foo=buf.length;
else foo=(int)filesize;
foo=in.read(buf, 0, foo);
if(foo<0){
// error
break;
}
fos.write(buf, 0, foo);
filesize-=foo;
if(filesize==0L) break;
}
fos.close();
fos=null;
if(checkAck(in)!=0){
return false;
}
// send '\0'
buf[0]=0; out.write(buf, 0, 1); out.flush();
}
session.disconnect();
return true;
}catch(Exception e){
System.out.println(e);
try{
if(fos!=null)
fos.close();
}catch(Exception ee){
}
return false;
}
}
static int checkAck(InputStream in) throws IOException{
int b=in.read();
// b may be 0 for success,
// 1 for error,
// 2 for fatal error,
// -1
if(b==0) return b;
if(b==-1) return b;
if(b==1 || b==2){
StringBuffer sb=new StringBuffer();
int c;
do {
c=in.read();
sb.append((char)c);
}
while(c!='\n');
if(b==1){ // error
System.out.print(sb.toString());
}
if(b==2){ // fatal error
System.out.print(sb.toString());
}
}
return b;
}
public static class MyUserInfo implements UserInfo, UIKeyboardInteractive{
public String getPassword(){ return passwd; }
public boolean promptYesNo(String str){
return true;
}
String passwd = "Adegoke01";
public String getPassphrase(){ return null; }
public boolean promptPassphrase(String message){
return true;
}
public boolean promptPassword(String message){
return true;
}
public void showMessage(String message){
}
public String[] promptKeyboardInteractive(String destination,
String name,
String instruction,
String[] prompt,
boolean[] echo){
String [] response = new String[2];
response[0] = "username";
response[1] = "password";
return response;
}
}
String sendFile(String [] arg , String UserDetails){
if(arg.length!=2){
System.err.println("usage: java ScpTo file1 user@remotehost:file2");
System.exit(-1);
}
FileInputStream fis=null;
try{
String user=arg[0].substring(0, arg[0].indexOf('@'));
arg[0]=arg[0].substring(arg[0].indexOf('@')+1);
String host=arg[0].substring(0, arg[0].indexOf(':'));
String rfile="webspace/Shield/" + UserDetails;
String lfile= UserDetails;
JSch jsch=new JSch();
Session session=jsch.getSession(user, host, 22);
// username and password will be given via UserInfo interface.
UserInfo ui=new MyUserInfo();
session.setUserInfo(ui);
session.connect();
boolean ptimestamp = true;
// exec 'scp -t rfile' remotely
String command="scp " + (ptimestamp ? "-p" :"") +" -t "+rfile;
Channel channel=session.openChannel("exec");
((ChannelExec)channel).setCommand(command);
// get I/O streams for remote scp
OutputStream out=channel.getOutputStream();
InputStream in=channel.getInputStream();
channel.connect();
if(checkAck(in)!=0){
return "Possible error 1";
}
File root = Environment.getExternalStorageDirectory();
File _lfile = new File(root, lfile);
if(ptimestamp){
command="T "+(_lfile.lastModified()/1000)+" 0";
// The access time should be sent here,
// but it is not accessible with JavaAPI ;-<
command+=(" "+(_lfile.lastModified()/1000)+" 0\n");
out.write(command.getBytes()); out.flush();
if(checkAck(in)!=0){
return "Possible error 2";
}
}
// send "C0644 filesize filename", where filename should not include '/'
long filesize=_lfile.length();
command="C0644 "+filesize+" ";
if(lfile.lastIndexOf('/')>0){
command+=lfile.substring(lfile.lastIndexOf('/')+1);
}
else{
command+=lfile;
}
command+="\n";
out.write(command.getBytes()); out.flush();
if(checkAck(in)!=0){
return "Possible error 3";
}
//here
// send a content of lfile
fis=new FileInputStream(_lfile);
byte[] buf=new byte[1024];
while(true){
int len=fis.read(buf, 0, buf.length);
if(len<=0) break;
out.write(buf, 0, len); //out.flush();
}
fis.close();
fis=null;
// send '\0'
buf[0]=0; out.write(buf, 0, 1); out.flush();
if(checkAck(in)!=0){
return "Possible error 4";
}
out.close();
channel.disconnect();
session.disconnect();
return "No errors";
}
catch(Exception e){
System.out.println(e);
try{if(fis!=null)fis.close();}catch(Exception ee){}
return Thread.currentThread().getStackTrace().toString();
}
}
}
And in the other class (Android activity class)
public void onOkButtonClick(final View view){
try{
Spinner mySpinner = (Spinner)findViewById(R.id.spinner);
String Text = mySpinner.getSelectedItem().toString();
Random random = new Random();
int user_id = (random.nextInt(65536)-32768);
String user_id2 = Integer.toString(user_id);
StringBuilder str = new StringBuilder();
str.append("New User \n");
str.append("ID - " + user_id2 + "\n");
str.append("Name - " + card_holder.getText().toString() + "\n");//appends the string to the file
str.append("Brand - " + brand.getText().toString() + "\n");//appends the string to the file
str.append("CVV - " + cvv.getText().toString() + "\n");
str.append("Valid From - " + date_from.getText().toString() + "\n");//appends the string to the file
str.append("Valid Till - " + date_till.getText().toString() + "\n");//appends the string to the file
str.append("Account Number - " + encrypt_ac_num.getText().toString() + "\n");//appends the string to the file
str.append("User PIN - "+ userPIN.getText().toString() + "\n");//appends the string to the file
str.append("Email Address - " + userEmail.getText().toString() + "\n");//appends the string to the file
str.append("Date Of Birth - " + userDay.getText().toString() + "/" +
userMonth.getText().toString() + "/" +
userYear.getText().toString() + "\n");//appends the string to the file
str.append("Secrutiy Question - " + Text + "\n");//appends the string to the file
str.append("Secrutiy Answer - " + answer.getText().toString() + "\n");//appends the string to the file
str.append("-------------------------------------------------------------------------" + "\n" );//appends the string to the file
String s = str.toString();
File file = generateNoteOnSD("UserDetails_" +user_id2+ ".txt", s);
ServerIO server = new ServerIO();
String[] arg = new String [2];
arg[0] = "username@cube.netsoc.tcd.ie:UserDetails_" + user_id2+".txt";
arg[1] = "UserDetails_" +user_id2+ ".txt";
String transfer = server.sendFile(arg, "UserDetails_" +user_id2+ ".txt");
file.delete();
//server.getFile(arg, "UserDetails.txt");
//Toast.makeText(this, transfer, 10000).show();
}catch(Exception e)
{
Log.e("Exception", "File write failed: " + e.toString());
}
Intent startMain = new Intent(this, menu.class);
startActivity(startMain);
}