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 | import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
 
import javax.microedition.midlet.*;
import javax.microedition.io.Connector;
import javax.microedition.io.HttpConnection;
import javax.microedition.lcdui.*;
 
import org.json.me.JSONException;
import org.json.me.JSONObject;
 
/**
 * A minimal example MIDlet implemented
 * with Cell-ID look-up API.
 */
public class CellIdLookUpMidlet extends MIDlet
 implements CommandListener, Runnable {
 
 // **** Set the developer key here ****
 private final static String API_KEY = "";
 
 private Command exitCommand; 
 private Cell cell;
 private Form form;
 
 private StringItem itemLongitude, itemLatitude;
 private StringItem itemAccuracy, itemName;
 private double longitude, latitude, accuracy;
 private String cellName;
 
 public CellIdLookUpMidlet() {
 
  cell = new Cell();
 
  exitCommand = new Command("Exit", Command.EXIT, 1);
 
  form = new Form(null);
 
  itemLongitude = new StringItem("longitude: ",
		  Double.toString(longitude));
  itemLatitude = new StringItem("latitude: ",
		  Double.toString(latitude));
  itemAccuracy = new StringItem("accuracy: ",
		  Double.toString(accuracy));
  itemName = new StringItem("name: ",cellName);
 
  form.insert(0, itemLongitude);
  form.insert(1, itemLatitude);
  form.insert(2, itemAccuracy);
  form.insert(3, itemName);
 
  form.addCommand(exitCommand);
  form.setCommandListener(this);
 
  Thread t = new Thread(this);
  t.start();
 }
 
 public void run() {
  updatePosition();
 }
 
 private void updateForm() {
  itemLongitude.setText(Double.toString(longitude));
  itemLatitude.setText(Double.toString(latitude));
  itemAccuracy.setText(Double.toString(accuracy));
  itemName.setText(cellName);
 }
 
 protected void startApp() {
  Display.getDisplay(this).setCurrent(form);
 }
 
 protected void pauseApp() {}
 protected void destroyApp(boolean bool) {}
 
 public void commandAction(Command cmd, Displayable d) {
  if(cmd==exitCommand) {
   destroyApp(false);
   notifyDestroyed();
  }
 }
 
 /**
  * updatePosition
  * The format of the position data is either xml or json.
  * In this example we are using json
  */
 public void updatePosition() {
  StringBuffer url = new StringBuffer();
  url.append("<a href="http://cellid.labs.ericsson.net/json/lookup"">http://cellid.labs.ericsson.net/json/lookup"</a>);
  url.append("?cellid=").append(cell.getCellId());
  url.append("&mnc=").append(cell.getMnc());
  url.append("&mcc=").append(cell.getMcc());
  url.append("&lac=").append(cell.getLac());
  url.append("&key=").append(API_KEY);
 
  try {
   byte[] data = getHttp(url.toString());
   if(data!=null) {
	parseJSON(new String(data));
	updateForm();
   }
  } catch (IOException e) {
   e.printStackTrace();
  }
 }
 
 /**
  * parseJSON
  * 
  * For JSON support we are using org.json.me
  * The JSON package can be downloaded from here:
  *  <a href="http://www.json.org/java/org.json.me.zip
">www.json.org/java/org.json.me.zip
</a>  */
 public void parseJSON(String jsonString) {
  try {
   JSONObject o = new JSONObject(jsonString);
   JSONObject pos = o.getJSONObject("position");
   this.longitude = pos.getDouble("longitude");
   this.latitude = pos.getDouble("latitude");
   this.accuracy = pos.getDouble("accuracy");
   this.cellName = pos.optString("name");
  } catch(JSONException e) {
   e.printStackTrace();
  }
 }
 
 static public byte[] getHttp(String url)
  throws IOException {
 
  HttpConnection c = null;
  InputStream is = null;
  byte[] data = null;
 
  try {
   c = (HttpConnection)Connector.open(url);
   int rc = c.getResponseCode();            
 
   // handle the HTTP response codes used by the API
   if(rc!=HttpConnection.HTTP_OK) {
	switch(rc) {
	case HttpConnection.HTTP_NO_CONTENT:
	 throw new IOException("The cell could not be "+
		"found in the database");
	case HttpConnection.HTTP_BAD_REQUEST:
	 throw new IOException("Check if some parameter "+
		"is missing or misspelled");
	case HttpConnection.HTTP_UNAUTHORIZED:
	 throw new IOException("Make sure the API key is "+
		"present and valid");
	case HttpConnection.HTTP_FORBIDDEN:
	 throw new IOException("You have reached the limit "+
		"for the number of requests per day. The maximum "+
		"number of requests per day is currently 500.");
	case HttpConnection.HTTP_NOT_FOUND:
	 throw new IOException("The cell could not be found "+
			 "in the database");
	default:
	 throw new IOException("HTTP response code: " + rc);
	}
   }
 
   is = c.openInputStream();
 
   int actual = 0;
   int len = (int)c.getLength();
   if(len>0) {
	int bytesread = 0 ;
	// the server returned a length so we can allocate
	// a byte array directly
	data = new byte[len];
	// loop until there is nothing more to read or
	// until buffer is full
	while((bytesread != len) && (actual != -1)) {
	 actual = is.read(data, bytesread, len - bytesread);
	 bytesread += actual;
	}
   } else {
	// the server is not returning a length
	// so we need a ByteArrayOutputStream
	ByteArrayOutputStream bos = new ByteArrayOutputStream();
	// create a 256 bytes read buffer to
	// improve reading performance
	byte buf[] = new byte[256];
	// loop for as long as we get data from the server
	// and add it to the output stream
	while((actual = is.read(buf, 0, 256))!=-1) {
	 bos.write(buf, 0, actual);
	}
	bos.flush();
	data = bos.toByteArray();
   }
  } catch (ClassCastException e) {
   throw new IllegalArgumentException("Not an HTTP URL");
  } finally {
   try { if (c != null) c.close(); } catch(IOException e) {};
   try { if (is != null) is.close(); } catch(IOException e) {};
  }
  return data;
 }
 
 /**
  * Cell class to handle cell id parameters.
  * Note that this is Sony Ericsson specific code.
  */
 public class Cell {
 
  private String id;
  private String lac;
  private String mcc;
  private String mnc;
 
  public Cell() {
   update();
  }
 
  public void update() {
   try {
	id = System.getProperty("com.sonyericsson.net.cellid");
	lac = System.getProperty("com.sonyericsson.net.lac");
	mcc = System.getProperty("com.sonyericsson.net.cmcc");
	mnc = System.getProperty("com.sonyericsson.net.cmnc");
   } catch(Exception e) {
	e.printStackTrace();
   }
  }
 
  public String getCellId() { return id; }
  public String getLac() { return lac; }
  public String getMcc() { return mcc; }
  public String getMnc() { return mnc; }
 }
} | 
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