Printing ssh log to list using AOH (android)

I am trying to print the items in my directory in a listView by adding log.i string values ​​containing my directory names to an array, then using an array adapter to print through the listView. However, when I try to start the application, it prints a log containing the names of my directory, but it prints nothing in the listView. Any help?

Here's my code:

    import android.os.AsyncTask;
    import android.os.Bundle;
    import java.io.DataInputStream;
    import java.io.DataOutputStream;
    import java.util.ArrayList;
    import java.util.Properties;

    import android.view.Menu;
    import android.view.View;

    import android.widget.AdapterView;
    import android.widget.ArrayAdapter;

    import com.jcraft.jsch.Channel;

    import com.jcraft.jsch.JSch;
    import com.jcraft.jsch.Session;
    import android.app.Activity;
    import android.util.Log;
    import android.widget.ListView;
    import android.widget.Toast;

    public class MainActivity extends Activity {

        private String user = "root"; //username
        private String pass = "password"; //password
        private String host = "hostname"; //hostname
        private int portNum = 22; //replace port number

        @Override
        public void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_main);

            new AsyncTask<Integer, Void, Void>() {

                @Override
                protected Void doInBackground(Integer... params) {
                    try {
                        executeRemoteCommand(user, pass, host, portNum);
                    } catch (Exception e) {
                        e.printStackTrace();
                    }
                    return null;
                }
            }.execute(1);

        }

        public String executeRemoteCommand(String username, String password, String hostname, int port)
                throws Exception {

            //declare list and array
            final ListView list = (ListView)findViewById(R.id.choose_sound_listView);
            ArrayList<String> soundNames = new ArrayList<String>();

            JSch jsch = new JSch();
            Session session = jsch.getSession(username, hostname, port);
            session.setPassword(password);

            // Avoid asking for key confirmation
            Properties prop = new Properties();
            prop.put("StrictHostKeyChecking", "no");
            session.setConfig(prop);

            session.connect();


            Channel channel = session.openChannel("shell");
            channel.connect();

            DataInputStream dataIn = new DataInputStream(channel.getInputStream());
            DataOutputStream dataOut = new DataOutputStream(channel.getOutputStream());

            // send ls command to the server
            dataOut.writeBytes("ls\r\n");
            dataOut.flush();

            // and print the response
            String line = dataIn.readLine();
            String out = line + "\n";

            // loop to add log string values to array
            for (int i = 0; i < 10; i++) {
                line = dataIn.readLine();
                out += line + "\n";
                Log.i("SSH", ": " + line);
                //add to array
                soundNames.add(line);
            }

            ArrayAdapter<String> adapter = new ArrayAdapter<String>(this,android.R.layout.simple_expandable_list_item_1, android.R.id.text1
                    , soundNames);


            list.setAdapter(adapter);

            list.setOnItemClickListener(new AdapterView.OnItemClickListener() {

                @Override
                public void onItemClick(AdapterView<?> arg0, View arg1,
                                        int position, long arg3) {

                    // Show Alert
                    Toast.makeText(getApplicationContext(),
                            "Alert", Toast.LENGTH_LONG)
                            .show();
                }
            });

            dataIn.close();
            dataOut.close();
            channel.disconnect();
            session.disconnect();

            return out;
        }

        @Override
        public boolean onCreateOptionsMenu(Menu menu) {
            // Inflate the menu; this adds items to the action bar if it is present.
            getMenuInflater().inflate(R.menu.menu_main, menu);
            return true;
        }
    }