(Android™) SFTP Synchronize Directory Tree - Download

Demonstrates how to download files to synchronize a local directory tree with a remote directory tree. The SyncTreeDownload method recursively descends the remote directory tree and downloads files based on existence, last-mod date/time and/or size differences.

Chilkat Android™ Downloads Android™ Java Libraries Android C/C++ Libraries

// 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);

    // This example requires the Chilkat SFTP API to have been previously unlocked.
    // See Unlock Chilkat SFTP for sample code.

    CkSFtp sftp = new CkSFtp();

    boolean success = sftp.Connect("my-ssh-server.com",22);
    if (success == true) {
        success = sftp.AuthenticatePw("mySshLogin","mySshPassword");
        }

    if (success == true) {
        success = sftp.InitializeSftp();
        }

    if (success != true) {
        Log.i(TAG, sftp.lastErrorText());
        return;
        }

    // Synchronize the remote directory tree rooted at "syncDownloadTest/xml"
    // with the local directory tree rooted at "qa_output"
    // Both directories are relative paths.  The remote directory
    // is relative to the HOME directory of the SSH user account.
    // The local directory is relative to the current working directory of the process.
    // It is also possible to use absolute paths.

    String remoteDir = "syncDownloadTest/xml";
    String localDir = "qa_output";

    // Possible modes that can be passed to the SyncTreeDownload method are:
    // mode=0: Download all files
    // mode=1: Download all files that do not exist on the local filesystem.
    // mode=2: Download newer or non-existant files.
    // mode=3: Download only newer files. If a file does not already exist on the local filesystem, it is not downloaded from the server.
    // mode=5: Download only missing files or files with size differences.
    // mode=6: Same as mode 5, but also download newer files.
    // mode=99: Do not download files, but instead delete remote files that do not exist locally.

    // This example will use mode 6 to download missing, newer, or files with size differences.
    int mode = 6;
    // This example will turn on recursion to synchronize the entire tree. 
    // Recursion can be turned off to synchronize the files of a single directory.
    boolean recursive = true;
    success = sftp.SyncTreeDownload(remoteDir,localDir,mode,recursive);
    if (success != true) {
        Log.i(TAG, sftp.lastErrorText());
        return;
        }

    Log.i(TAG, "Success.");

  }

  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."
  }
}