Android SSH

//Main (Aufruf der Methode)
    try {
            SSH.executeRemoteCommand("rm lol.txt" ,"root","******","******", 22);
        } catch (Exception e) {
            e.printStackTrace();
        }
//SSH Class
package com.example.luick.boat_rc;

import com.jcraft.jsch.ChannelExec;
import com.jcraft.jsch.JSch;
import com.jcraft.jsch.Session;

import java.io.ByteArrayOutputStream;
import java.util.Properties;


public class SSH {
    public static String executeRemoteCommand(String Command, String user, String pw, String ip, int port) throws Exception {

        JSch jsch = new JSch();
        Session session = jsch.getSession(user, ip, port);
        session.setPassword(pw);


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

        session.connect();

        // SSH Channel
        ChannelExec channelssh = (ChannelExec)
                session.openChannel("exec");
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        channelssh.setOutputStream(baos);

        // Execute command
        // Execute command
        channelssh.setCommand(Command);
        channelssh.connect();
        channelssh.disconnect();

        return baos.toString();
    }
}
//Fehler
04-22 04:52:07.623 2327-2578/com.example.luick.boat_rc W/EGL_emulation: eglSurfaceAttrib not implemented
04-22 04:52:07.623 2327-2578/com.example.luick.boat_rc W/OpenGLRenderer: Failed to set EGL_SWAP_BEHAVIOR on surface 0xae3e65c0, error=EGL_SUCCESS
04-22 04:52:17.311 2327-2327/com.example.luick.boat_rc W/System.err: com.jcraft.jsch.JSchException: android.os.NetworkOnMainThreadException
04-22 04:52:17.311 2327-2327/com.example.luick.boat_rc W/System.err:     at com.jcraft.jsch.Util.createSocket(Util.java:349)
04-22 04:52:17.311 2327-2327/com.example.luick.boat_rc W/System.err:     at com.jcraft.jsch.Session.connect(Session.java:215)
04-22 04:52:17.311 2327-2327/com.example.luick.boat_rc W/System.err:     at com.jcraft.jsch.Session.connect(Session.java:183)
04-22 04:52:17.311 2327-2327/com.example.luick.boat_rc W/System.err:     at com.example.luick.boat_rc.SSH.executeRemoteCommand(SSH.java:24)
04-22 04:52:17.311 2327-2327/com.example.luick.boat_rc W/System.err:     at com.example.luick.boat_rc.MainActivity.B_RIGHT(MainActivity.java:21)
04-22 04:52:17.311 2327-2327/com.example.luick.boat_rc W/System.err:     at java.lang.reflect.Method.invoke(Native Method)
04-22 04:52:17.311 2327-2327/com.example.luick.boat_rc W/System.err:     at android.support.v7.app.AppCompatViewInflater$DeclaredOnClickListener.onClick(AppCompatViewInflater.java:288)
04-22 04:52:17.311 2327-2327/com.example.luick.boat_rc W/System.err:     at android.view.View.performClick(View.java:5198)
04-22 04:52:17.311 2327-2327/com.example.luick.boat_rc W/System.err:     at android.view.View$PerformClick.run(View.java:21147)
04-22 04:52:17.311 2327-2327/com.example.luick.boat_rc W/System.err:     at android.os.Handler.handleCallback(Handler.java:739)
04-22 04:52:17.311 2327-2327/com.example.luick.boat_rc W/System.err:     at android.os.Handler.dispatchMessage(Handler.java:95)
04-22 04:52:17.311 2327-2327/com.example.luick.boat_rc W/System.err:     at android.os.Looper.loop(Looper.java:148)
04-22 04:52:17.311 2327-2327/com.example.luick.boat_rc W/System.err:     at android.app.ActivityThread.main(ActivityThread.java:5417)
04-22 04:52:17.311 2327-2327/com.example.luick.boat_rc W/System.err:     at java.lang.reflect.Method.invoke(Native Method)
04-22 04:52:17.311 2327-2327/com.example.luick.boat_rc W/System.err:     at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:726)
04-22 04:52:17.311 2327-2327/com.example.luick.boat_rc W/System.err:     at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:616)
04-22 04:52:17.311 2327-2327/com.example.luick.boat_rc W/System.err: Caused by: android.os.NetworkOnMainThreadException
04-22 04:52:17.315 2327-2327/com.example.luick.boat_rc W/System.err:     at android.os.StrictMode$AndroidBlockGuardPolicy.onNetwork(StrictMode.java:1273)
04-22 04:52:17.315 2327-2327/com.example.luick.boat_rc W/System.err:     at java.net.InetAddress.lookupHostByName(InetAddress.java:431)
04-22 04:52:17.315 2327-2327/com.example.luick.boat_rc W/System.err:     at java.net.InetAddress.getAllByNameImpl(InetAddress.java:252)
04-22 04:52:17.315 2327-2327/com.example.luick.boat_rc W/System.err:     at java.net.InetAddress.getAllByName(InetAddress.java:215)
04-22 04:52:17.315 2327-2327/com.example.luick.boat_rc W/System.err:     at java.net.Socket.tryAllAddresses(Socket.java:109)
04-22 04:52:17.315 2327-2327/com.example.luick.boat_rc W/System.err:     at java.net.Socket.<init>(Socket.java:178)
04-22 04:52:17.315 2327-2327/com.example.luick.boat_rc W/System.err:     at java.net.Socket.<init>(Socket.java:150)
04-22 04:52:17.315 2327-2327/com.example.luick.boat_rc W/System.err:     at com.jcraft.jsch.Util.createSocket(Util.java:343)
04-22 04:52:17.315 2327-2327/com.example.luick.boat_rc W/System.err: 	... 15 more
04-22 04:56:15.072 2327-2333/com.example.luick.boat_rc W/art: Suspending all threads took: 6.457ms