Android™
Android™
Close a Remote SFTP File or Directory Handle
See more SFTP Examples
Demonstrates the Chilkat SFtp.CloseHandle method, which closes a remote file or directory handle previously returned by OpenFile or OpenDir. The only argument is the handle.
Background: Every opened handle corresponds to state the server holds, and servers cap how many a session may keep open at once, so a long-running program that forgets to close handles will eventually start failing to open new ones. Closing also ensures buffered writes are committed. Once closed, a handle is invalid and must not be reused.
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 SFtp.CloseHandle method, which closes a remote file or directory handle. The
// only argument is the handle returned by OpenFile or OpenDir.
CkSFtp sftp = new CkSFtp();
// Connect, authenticate, and initialize the SFTP subsystem.
int port = 22;
success = sftp.Connect("sftp.example.com",port);
if (success == false) {
Log.i(TAG, sftp.lastErrorText());
return;
}
// 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.
String password = "mySshPassword";
success = sftp.AuthenticatePw("mySshLogin",password);
if (success == false) {
Log.i(TAG, sftp.lastErrorText());
return;
}
success = sftp.InitializeSftp();
if (success == false) {
Log.i(TAG, sftp.lastErrorText());
return;
}
// Open a remote file, obtaining a handle.
String handle = sftp.openFile("subdir/data.txt","readOnly","openExisting");
if (sftp.get_LastMethodSuccess() == false) {
Log.i(TAG, sftp.lastErrorText());
return;
}
// ... use the handle ...
// Close the handle to release the server-side resource. A handle should not be used after it
// is closed.
success = sftp.CloseHandle(handle);
if (success == false) {
Log.i(TAG, sftp.lastErrorText());
return;
}
Log.i(TAG, "Handle closed.");
sftp.Disconnect();
}
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."
}
}