Hi, I'm trying to let Android and Arduino exchange data directly by IP. After 3 weeks work, it's ok to send OSC message from Android emulator to Arduino with Ethernet Shield. also,processing can receive OSC message from  Arduino.

But the problem is, when run the Processing Sketch on Android emulator, it can not receive OSC message from  Arduino.

this is data sending part from Arduino:

2. byte myMac[] = { 0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED };
3. byte myIp[]  = { 131,113,xxx,xx7 }; // IP for Arduino with Ethernet Shield
4. byte destIp[] =  { 131,113,xxx,xx5 };// IP for Processing sketch
5. int  destPort = 12000;
6. int  serverPort  = 12000;

this is data receiving part from Processing for Android:

2. oscP5 = new OscP5(this,12000);
3.   myRemoteLocation = new NetAddress("131.113.136.217",12000);

run the processing sketch on laptop it works very well(send and receive),

but when run it on Android emulator,it does not work.(send is ok, receive doesn't work)
processing console information shows like this: 
" INFO @ OscP5 is running. you (127.0.0.1) are listening @ port 12000" 

Guess is about IP address, cause i use specific IP address to send and receive OSC message between them.
but now the emulator use localhost address, does Emulator has IP address like this " 131,113,xxx,xx5 "?

any ideas? any advices?

I'll post the working code after solve this problem. thanks so much.

Cheers and thanks in advance!

oscP5 on Processing:

2. /**
3.  * oscP5sendreceive by andreas schlegel
4.  * example shows how to send and receive osc messages.
5.  * oscP5 website at http://www.sojamo.de/oscP5
6.  */
7. 
   
8. import oscP5.*;
9. import netP5.*;
10. 
    
11. OscP5 oscP5;
12. NetAddress myRemoteLocation;
13. 
    
14. void setup() {
15.   size(400,400);
16.   frameRate(25);
17.   /* start oscP5, listening for incoming messages at port 12000 */
18.   oscP5 = new OscP5(this,12000);
19. 
    
20.   /* myRemoteLocation is a NetAddress. a NetAddress takes 2 parameters,
21.    * an ip address and a port number. myRemoteLocation is used as parameter in
22.    * oscP5.send() when sending osc packets to another computer, device, 
23.    * application. usage see below. for testing purposes the listening port
24.    * and the port of the remote location address are the same, hence you will
25.    * send messages back to this sketch.
26.    */
27.   /*change  192.168.0.10 to your own IP address*/
28.   myRemoteLocation = new NetAddress(" 192.168.0.10",12000);
29. }
30. 
    
31. void draw() {
32. }
33. 
    
34. /* incoming osc message are forwarded to the oscEvent method. */
35. void oscEvent(OscMessage theOscMessage) {
36. 
    
37.   if(theOscMessage.checkAddrPattern("/mousedown")) 
38.   {
39.     /* print the address pattern and the typetag of the received OscMessage */
40.     //  print("### received an osc message.");
41.     //  print(" addrpattern: "+theOscMessage.addrPattern());
42.     //  println(" typetag: "+theOscMessage.typetag());
43.    println("aha!");
44.    background(255);
45.   } 
46.   else if(theOscMessage.checkAddrPattern("/mousedrag")) {
47.     println("wooooooooooooow!");
48.   }
49.   else if(theOscMessage.checkAddrPattern("/mouseup")) {
50.     println("yeah!");
51.      background(0);
52.   }
53. }

oscP5 on  Android emulatior:

2. /*
3. Send mouse positions from Android emulatior to Processing sketch running on same WiFi network.
4. Modification based on hva.francesco's work. http://forum.processing.org/#Topic/25080000000336005
5. Version 0.1 By Lei Gao http://imlab.cc/whale (10.Nov.2010)
6. */
7. 
   
8. import oscP5.*;
9. import netP5.*;
10. 
    
11. OscP5 oscP5;
12. NetAddress myRemoteLocation;
13. 
    
14. int x;
15. int y;
16. 
    
17. void setup() {
18.   size(screenWidth,screenHeight);
19.   background(255);
20.   frameRate(25);
21.   /* set up a remote location */
22.   /*change  192.168.0.10 to your own IP address*/
23.   myRemoteLocation = new NetAddress(" 192.168.0.10",12000);
24. }
25. 
    
26. void draw() {
27. }
28. void mousePressed() {
29.   // create a new OscMessage with an address pattern, in this case /mouse_down. 
30.   OscMessage myOscMessage = new OscMessage("/mousedown");
31.   // add a value (an integer) to the OscMessage 
32.   myOscMessage.add(mouseX);
33.   myOscMessage.add(mouseY);
34.   //send the OscMessage to the remote location.    
35.   OscP5.flush(myOscMessage,myRemoteLocation);
36.   x = mouseX;
37.   y = mouseY;
38. }
39. 
    
40. void mouseDragged() {
41.   // create a new OscMessage with an address pattern, in this case /mouse_down. 
42.   OscMessage myOscMessage = new OscMessage("/mousedrag");
43.   // add a value (an integer) to the OscMessage 
44.   myOscMessage.add(mouseX);
45.   myOscMessage.add(mouseY);
46.   //send the OscMessage to the remote location.    
47.   OscP5.flush(myOscMessage,myRemoteLocation);
48.   //  OscP5.flush(myOscMessage,myRemoteLocation);
49.   // draws on screen
50.   stroke(0);
51.   line(x,y,mouseX,mouseY);
52.   x = mouseX;
53.   y = mouseY;
54.   noStroke();
55. }
56. 
    
57. void mouseReleased() {
58.   // create a new OscMessage with an address pattern, in this case /mouse_down. 
59.   OscMessage myOscMessage = new OscMessage("/mouseup");
60.   // add a value (an integer) to the OscMessage 
61.   myOscMessage.add(mouseX);
62.   myOscMessage.add(mouseY);
63.   //send the OscMessage to the remote location.    
64.   OscP5.flush(myOscMessage,myRemoteLocation);
65. }
66. 
    
67. void keyPressed() {
68.   if(key == CODED) {
69.     if (keyCode == UP) {
70.       OscMessage myOscMessage = new OscMessage("/margins");
71.       // IMPORTANTE: per android cambiare con le seguenti righe
72.       myOscMessage.add(screenWidth);
73.       myOscMessage.add(screenHeight);
74.       OscP5.flush(myOscMessage,myRemoteLocation);
75.       background(255);
76.     }
77.   }
78. }

I'm trying to build a SMS like system by Processing, it should works like this: One Sketch send sentence, another one receive. They should both have Text input area and display area. and for sure submit button.

I had try  oscP5 multicast to send mouse pressed data from one sketch to another one to change the background color,it works great.

But as a new guy for Processing.  I still have no idea about:

1,How to send and receive Text not just number. (with oscP5 and String?)

2, How to display the received  Text like iPhone SMS pop-up dialog.

3,,,,,

any feed back will be very helpful and thanks so much for reading.

Best,

Gao