use datagram sockets

[UdpRespond.git] / src / com / example / udpresponder / UdpRespondActivity.java

diff --git a/src/com/example/udpresponder/UdpRespondActivity.java b/src/com/example/udpresponder/UdpRespondActivity.java
index 7ef9709749f9909b2b3d7be5bf2ae562f7c5b0a1..30da0b4c66fb0bb479fe59d6f8e9ff9ce26c2b90 100644 (file)
--- a/src/com/example/udpresponder/UdpRespondActivity.java
+++ b/src/com/example/udpresponder/UdpRespondActivity.java
@@ -1,35 +1,44 @@
 package com.example.udpresponder;
 
 package com.example.udpresponder;
 

+import java.net.InetAddress;
+import java.net.InetSocketAddress;
+import java.net.DatagramPacket;
+import java.net.DatagramSocket;

 import android.app.Activity;
 import android.os.Bundle;
 import android.os.Handler;
 import android.os.Message;
 import android.os.SystemClock;
 import android.widget.TextView;
 import android.app.Activity;
 import android.os.Bundle;
 import android.os.Handler;
 import android.os.Message;
 import android.os.SystemClock;
 import android.widget.TextView;

+import android.widget.EditText;

 import android.widget.Button;
 import android.view.View;
 import android.view.View.OnClickListener;
 
 public class UdpRespondActivity extends Activity {
 
 import android.widget.Button;
 import android.view.View;
 import android.view.View.OnClickListener;
 
 public class UdpRespondActivity extends Activity {
 

+       private TextView tv;
+       private EditText et;
+

        private Handler mHandler = new Handler() {
                public void handleMessage(Message msg) {
                        Bundle bdl = msg.getData();
        private Handler mHandler = new Handler() {
                public void handleMessage(Message msg) {
                        Bundle bdl = msg.getData();

-                       updateUI(bdl.getString("ln"));
+                       tv.append(bdl.getString("ln"));

                }
        };
 
                }
        };
 

-       private TextView tv;
-

        private OnClickListener mStartListener = new OnClickListener() {
                public void onClick(View v) {
        private OnClickListener mStartListener = new OnClickListener() {
                public void onClick(View v) {

-                       tv.append("Start pressed\n");
+                       CharSequence cs = et.getText();
+                       tv.append("Start pressed, data: " +
+                               cs.toString() +
+                               " (unimplemented)\n");

                }
        };
 
        private OnClickListener mStopListener = new OnClickListener() {
                public void onClick(View v) {
                }
        };
 
        private OnClickListener mStopListener = new OnClickListener() {
                public void onClick(View v) {

-                       tv.append("Stop pressed\n");
+                       tv.append("Stop pressed, exiting\n");

                        finish();
                }
        };
                        finish();
                }
        };


@@ -40,6 +49,7 @@ public class UdpRespondActivity extends Activity {
                setContentView(R.layout.main);
                tv = (TextView)findViewById(R.id.tv);
                tv.append(" Starting\n");
                setContentView(R.layout.main);
                tv = (TextView)findViewById(R.id.tv);
                tv.append(" Starting\n");

+               et = (EditText)findViewById(R.id.text_entry);

                Button btn_start = (Button)findViewById(R.id.btn_start);
                btn_start.setOnClickListener(mStartListener);
                Button btn_stop = (Button)findViewById(R.id.btn_stop);
                Button btn_start = (Button)findViewById(R.id.btn_start);
                btn_start.setOnClickListener(mStartListener);
                Button btn_stop = (Button)findViewById(R.id.btn_stop);


@@ -47,23 +57,56 @@ public class UdpRespondActivity extends Activity {
                startBgThread();
        }
 
                startBgThread();
        }
 

-       private void updateUI(String str) {
-               tv.append(str);
+       private void println(String str) {
+               Bundle bdl = new Bundle();
+               bdl.putString("ln", str + "\n");
+               Message msg = Message.obtain(mHandler);
+               msg.setData(bdl);
+               msg.sendToTarget();

        }
 
        protected void startBgThread () {
                Thread t = new Thread() {
                        public void run() {
        }
 
        protected void startBgThread () {
                Thread t = new Thread() {
                        public void run() {

-                               while (true) {
-                                       SystemClock.sleep(3000);
-                                       Bundle bdl = new Bundle();
-                                       bdl.putString("ln", "this is msg\n");
-                                       Message msg = Message.obtain(mHandler);
-                                       msg.setData(bdl);
-                                       msg.sendToTarget();
-                               }
+                               bgTask();

                        }
                };
                t.start();
        }
                        }
                };
                t.start();
        }

+
+       private void bgTask() {
+               DatagramSocket s = null;
+               try {
+                       s = new DatagramSocket(9999);
+               } catch (java.net.SocketException e) {
+                       println("socket: " + e);
+                       return;
+               }
+//             InetSocketAddress sa = new InetSocketAddress(9999);
+//             try {
+//                     s.bind(sa);
+//             } catch (IllegalArgumentException e) {
+//                     println("bind: " + e);
+//                     return;
+//             } catch (java.net.SocketException e) {
+//                     println("bind: " + e);
+//                     return;
+//             }
+               println("Bound to port " + s.getLocalPort());
+               while (true) {
+                       byte[] data = new byte[256];
+                       DatagramPacket pkt = new DatagramPacket(data, 256);
+                       try {
+                               s.receive(pkt);
+                       } catch (java.io.IOException e) {
+                               println("receive: " + e);
+                       }
+                       InetAddress ia = pkt.getAddress();
+                       int ip = pkt.getPort();
+                       byte[] id = pkt.getData();
+                       println(ia.toString() + ":" +
+                               ip + " " +
+                               id.toString());
+               }
+       }

 }
 }