client.py

import bluetooth as bt
import sys, time
from random import random

uuid = "94f39d29-7d6d-437d-973b-fba39e49d4ee"
matches = bt.find_service(uuid=uuid)

if len(matches) == 0:
    raw_input("No matching service found!")
    sys.exit(0)

print "%i matching services found! Taking first" %len(matches)
server = matches[0]
name = server["name"]
port = server["port"]
host = server["host"]

print "Connecting to %s on %s" %(name, host)
sock = bt.BluetoothSocket(bt.RFCOMM)
sock.connect((host, port))

print "Connected. Data will be sent..."
data = [0.5 for x in range(5)];
while True:
    for i,d in enumerate(data):
        data[i] = d + random()*0.02-0.01 + (0.5-d)/200
    sock.send(", ".join("%0.3f"%x for x in data)+"\n")
    time.sleep(0.15);

sock.close()
raw_input("This session has concluded peacefully. Goodbye!")

server.java

public class MainActivity extends Activity {

   private Button Connect;
   private TextView SerialConsole;
   private BluetoothAdapter BA;
   private Set<BluetoothDevice>pairedDevices;
   private BluetoothServerSocket bsvrsock;
   private BluetoothSocket bsock;
   private UUID uuid;
   
   private String incomingdata;
   private String newdataline;
   
   @Override
   protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_main);
      Connect = (Button)findViewById(R.id.makeVisibleButton);
      SerialConsole = (TextView)findViewById(R.id.serialStatus);
      BA = BluetoothAdapter.getDefaultAdapter();
      uuid = UUID.fromString("94f39d29-7d6d-437d-973b-fba39e49d4ee");
      if (BA == null) finish();
      
      incomingdata = "";
      
   }
   
   public void connect(View view){
  	try {
  		bsvrsock = BA.listenUsingRfcommWithServiceRecord("Freeflow Bluetooth", uuid);
  	} catch (IOException e) {
  		Toast.makeText(getApplicationContext(),"Unable to create socket!" ,
  			      Toast.LENGTH_LONG).show();
  		return;
  	}
  	try {
  		bsock = bsvrsock.accept();
  		bsvrsock.close();
  	} catch (IOException e) {
  		Toast.makeText(getApplicationContext(),"Socket accept failed!" ,
  			      Toast.LENGTH_LONG).show();
  		return;
  	}
      
	  Toast.makeText(getApplicationContext(),"Connected!" ,
		      Toast.LENGTH_LONG).show();
	  
	  SerialConsole.setText("Awaiting communication...");
	  (new Timer()).schedule(new TimerTask() {
    	  @Override
    	  public void run() {
    		  try {
    				InputStream inp = bsock.getInputStream();
    				while (inp.available() > 0) {
    					char c = (char)inp.read();
    					if (c == ("\n").charAt(0)) {
    						newdataline = incomingdata;
    						incomingdata = "";
    						MainActivity.this.runOnUiThread(new Runnable() {
    							@Override
    							public void run() {
    								SerialConsole.setText("Received:\n"+newdataline);
    							}
    						});
    					}
    					incomingdata = incomingdata + String.valueOf(c);
    				}
    			} catch (IOException e) {
    				MainActivity.this.runOnUiThread(new Runnable() {
						@Override
						public void run() {
							SerialConsole.setText("Could not read from socket.");
						}
					});
    				this.cancel();
    			}
    	  }
      }, 500, 40);
   } 
   

}

Code for connecting a Python client to an Android server using the pybluez bluetooth library.