Android™
Android™
Throttle FTP Transfer Bandwidth
See more FTP Examples
Demonstrates the bandwidth properties BandwidthThrottleUp and BandwidthThrottleDown, and the read-only UploadTransferRate and DownloadTransferRate.
Note: The local paths are relative to the application's current working directory. Absolute paths may also be used. Supply the paths appropriate to your own environment.
Background: Throttling caps the approximate transfer rate in bytes per second (0 means unlimited), which is how a background sync avoids starving interactive traffic on a shared or metered link. The rate properties report the current measured throughput, updated during transfers, so you can display progress or confirm the throttle is taking effect. Treat the limits as approximate targets rather than hard ceilings.
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;
CkFtp2 ftp = new CkFtp2();
ftp.put_Hostname("ftp.example.com");
ftp.put_Username("myFtpLogin");
// Limit the approximate transfer rate in bytes per second. 0 (the default) means no limit.
// Throttling is useful to avoid saturating a shared link.
ftp.put_BandwidthThrottleDown(1048576);
ftp.put_BandwidthThrottleUp(524288);
// 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.GetFile("public_html/bigfile.zip","qa_output/bigfile.zip");
if (success == false) {
Log.i(TAG, ftp.lastErrorText());
return;
}
// The current average rates are updated during transfers.
Log.i(TAG, "Download rate: " + String.valueOf(ftp.get_DownloadTransferRate()) + " bytes/sec");
Log.i(TAG, "Upload rate: " + String.valueOf(ftp.get_UploadTransferRate()) + " bytes/sec");
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."
}
}