Android™

FTP Download Binary File to a Stream

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Demonstrates how to FTP download a binary file to a Chilkat stream.

Note: This example requires Chilkat v9.5.0.67 or greater.

Android™

// 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;

    // This example assumes the Chilkat FTP2 API to have been previously unlocked.
    // See FTP2 Unlock Sample for sample code.

    CkFtp2 ftp = new CkFtp2();

    ftp.put_Hostname("www.my-ftp-server.com");
    ftp.put_Username("mFtpLogin");
    ftp.put_Password("myFtpPassword");
    ftp.put_AuthTls(true);
    ftp.put_Passive(true);

    // Connect and login to the FTP server using TLS.
    success = ftp.Connect();
    if (success != true) {
        Log.i(TAG, ftp.lastErrorText());
        return;
        }

    // We'll read the incoming data chunk-by-chunk and write to an output file.
    CkFileAccess fac = new CkFileAccess();
    success = fac.OpenForWrite("qa_output/penguins2.jpg");
    if (success != true) {
        Log.i(TAG, fac.lastErrorText());
        return;
        }

    CkStream streamObj = new CkStream();

    // Create a task to do the FTP download.
    CkTask t = ftp.GetFileToStreamAsync("penguins2.jpg",streamObj);
    if (ftp.get_LastMethodSuccess() != true) {
        Log.i(TAG, ftp.lastErrorText());
        return;
        }

    // Start the task in a background thread.
    t.Run();

    CkBinData bd = new CkBinData();
    while (streamObj.get_EndOfStream() != true) {
        // Get the next chunk of JPG bytes.
        streamObj.ReadBd(bd);
        // Do something with it..
        // In this simple example, we'll just write to the file.
        fac.FileWriteBd(bd,0,0);
        // Clear for the next read.
        bd.Clear();
        }

    fac.FileClose();

    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."
  }
}