Re: Java (android) socket reconnection

From:
artik <olsztyn.arti@gmail.com>
Newsgroups:
comp.lang.java.programmer
Date:
Sun, 9 Dec 2012 08:26:53 -0800 (PST)
Message-ID:
<27f309f0-5118-4fa8-8b26-858d19af27de@googlegroups.com>
My whole code looks like. I have to use to threads due to manage obtaining data from server too. Could You look at it in free time and tell me what's wrong?

Regards
Artik

public class MainActivity extends Activity {
    Button button;
    TextView textview1;
    public Socket sock = null;
    private BufferedWriter out;
    private Thread thrd2, thrd1;
    private static String address = "xyz";

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        button = (Button) findViewById(R.id.button1);
        textview1 = (TextView) findViewById(R.id.editText1);
        button.setOnClickListener(new Button.OnClickListener() {

            public void onClick(View v) {
                thrd2 = new Thread(new Runnable() {
                    public void run() {
                        while (!Thread.interrupted()) {
                            try {
                                if (out != null) {
                                    out.write("TEST DATA\n");
                                    out.flush();
                                    try {
                                        Thread.sleep(1000);
                                    } catch (InterruptedException e) {

                                        e.printStackTrace();
                                    }
                                }
                                // if sock is null wait 300ms
                                else {
                                    try {
                                        Thread.sleep(300);
                                    } catch (InterruptedException e) {
                                        e.printStackTrace();
                                    }

                                }

                            } catch (IOException e) {
                                try {
                                    stopSocket();
                                    Thread.sleep(1000);
                                } catch (InterruptedException e1) {
                                    e.printStackTrace();
                                }
                            }
                        }
                    }
                });

                thrd1 = new Thread(new Runnable() {
                    public void run() {
                        while (!Thread.interrupted()) {
                            try {
                                Thread.sleep(1000);
                            } catch (InterruptedException e1) {

                            }
                            if (sock == null)
                                try {
                                    sock = new Socket();
                                    sock.connect(new InetSocketAddress(address,
                                            5000), 1000);
                                    sock.setSoLinger(true, 1);
                                    sock.setTcpNoDelay(true);
                                    out = new BufferedWriter(
                                            new OutputStreamWriter(sock
                                                    .getOutputStream()));
                                    if ((thrd2 != null) && (!thrd2.isAlive()))
                                        thrd2.start();
                                } catch (UnknownHostException e) {
                                    stopSocket();

                                } catch (IOException e) {
                                    stopSocket();
                                }
                        }
                        ;
                    }
                });

                if ((thrd1 != null) && (!thrd1.isAlive()))
                    thrd1.start();
            };
        });
    }

    public void stopSocket() {
        try {
            if (out != null) {
                out.close();
            }
        } catch (IOException e) {
            Log.d("-----", e.getMessage() + " " + e.getCause());
        }
        try {
            if (sock != null) {
                sock.close();
            }
            sock = null;
        } catch (IOException e) {
            Log.d("-----", e.getMessage() + " " + e.getCause());
            sock = null;
            out = null;

        }
    }

}

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