Android™
Android™
Get an FTP Listing Entry's Last-Modified Time
See more FTP Examples
Demonstrates the Chilkat Ftp2.GetLastModifiedTimeStr method, which returns the last-modified time of a cached directory-listing entry as an RFC 822 date-time string. The only argument is a zero-based index.
Background: The last-modified time is the workhorse timestamp: it updates whenever a file's contents change and is what sync and mirror logic compares to decide whether a file needs re-transferring. It is the most reliably reported of the three across FTP servers, and the RFC 822 string carries a timezone so comparisons are well defined.
Chilkat Android™ Downloads
// Important: Don't forget to include the call to System.loadLibrary
// as shown at the bottom of this code sample.
package com.test;
import android.app.Activity;
import com.chilkatsoft.*;
import android.widget.TextView;
import android.os.Bundle;
public class SimpleActivity extends Activity {
private static final String TAG = "Chilkat";
// Called when the activity is first created.
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
boolean success = false;
// Demonstrates the Ftp2.GetLastModifiedTimeStr method, which returns the last-modified time of a
// cached directory-listing entry as an RFC 822 date-time string. The only argument is a
// zero-based index.
CkFtp2 ftp = new CkFtp2();
ftp.put_Hostname("ftp.example.com");
ftp.put_Username("myFtpLogin");
// Normally you would not hard-code the password in source. You should instead obtain it
// from an interactive prompt, environment variable, or a secrets vault.
ftp.put_Password("myPassword");
success = ftp.Connect();
if (success == false) {
Log.i(TAG, ftp.lastErrorText());
return;
}
success = ftp.ChangeRemoteDir("public_html");
if (success == false) {
Log.i(TAG, ftp.lastErrorText());
return;
}
// GetDirCount retrieves the directory listing on the first call and returns the number of
// entries. A negative return indicates failure.
int n = ftp.GetDirCount();
if (n < 0) {
Log.i(TAG, ftp.lastErrorText());
return;
}
int i;
for (i = 0; i <= n - 1; i++) {
String name = ftp.getFilename(i);
// The value is an RFC 822 string such as "Fri, 21 Nov 1997 09:55:06 -0600".
String lastModified = ftp.getLastModifiedTimeStr(i);
Log.i(TAG, name + " modified " + lastModified);
}
success = ftp.Disconnect();
if (success == false) {
Log.i(TAG, ftp.lastErrorText());
return;
}
}
static {
System.loadLibrary("chilkat");
// Note: If the incorrect library name is passed to System.loadLibrary,
// then you will see the following error message at application startup:
//"The application <your-application-name> has stopped unexpectedly. Please try again."
}
}