import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import net.schmizz.sshj.SSHClient;
import net.schmizz.sshj.connection.channel.direct.Session;
import java.io.IOException;

public class MainActivity extends AppCompatActivity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }
    public static void main(String... args)
            throws IOException {
        final SSHClient ssh = new SSHClient();

        ssh.connect("192.168.1.5,22");
        try {
            ssh.authPassword("pi","heslo");
            final Session session = ssh.startSession();
            try {
                final Session.Command cmd = session.exec("echo raspberry | sudo -S reboot");
            } finally {
                session.close();
            }
        } finally {
            ssh.disconnect();
        }
    }
}