Como criar uma URL usando NFC - Revision history

Hamishwillee: Hamishwillee - Bot update of Template:ArticleMetaData

2011-12-18T23:28:10Z

Hamishwillee - Bot update of Template:ArticleMetaData

Hamishwillee: Hamishwillee - Bot update of Template:ArticleMetaData

2011-12-07T07:03:21Z

Hamishwillee - Bot update of Template:ArticleMetaData

Hamishwillee: Hamishwillee - Bot addition of Template:ArticleMetaData

2011-11-10T04:21:37Z

Hamishwillee - Bot addition of Template:ArticleMetaData

Hamishwillee: Hamishwillee - Automated change of category from Lang-PT to Unlikely Category. (Moving)

2011-07-14T05:17:40Z

Hamishwillee - Automated change of category from Lang-PT to Unlikely Category. (Moving)

Valderind4: moved Escritor de URL usando NFC to Como criar uma URL usando NFC

2009-09-07T03:18:47Z

moved Escritor de URL usando NFC to Como criar uma URL usando NFC

Valderind4: Created page with 'Category:Java ME (Português) Category:Lang-PT Category:Exemplos de código Java ME Original em: NFC URLWriter Este código mostra um MIDlet básico que escreve …'

2009-09-06T05:20:42Z

Created page with 'Category:Java ME (Português) Category:Lang-PT Category:Exemplos de código Java ME Original em: NFC URLWriter Este código mostra um MIDlet básico que escreve …'

New page

[[Category:Java ME (Português)]]
[[Category:Lang-PT]]
[[Category:Exemplos de código Java ME]]
Original em: [[NFC URLWriter]]

Este código mostra um MIDlet básico que escreve uma URL para uma tag/Transponder externo. (Mostrado no NFC Forum Developer Training, WIMA 2008 e NFC-Congress Hagenberg 2008)
Baixe o apropriado NetBeans projetoDownload: [[Image:URLWriter.zip]].

<code java>
package at.nfcresearch.wima.examples;

// Packages for contactless Communcation
import java.io.IOException;
import javax.microedition.contactless.ContactlessException;
import javax.microedition.contactless.DiscoveryManager;
import javax.microedition.contactless.TargetProperties;
import javax.microedition.contactless.TargetListener;
import javax.microedition.contactless.TargetType;

// Packages for NDEF
import javax.microedition.contactless.ndef.NDEFRecord;
import javax.microedition.contactless.ndef.NDEFMessage;
import javax.microedition.contactless.ndef.NDEFRecordType;
import javax.microedition.contactless.ndef.NDEFTagConnection;
import javax.microedition.io.Connector;

// Packages for GUI Stuff
import javax.microedition.lcdui.Alert;
import javax.microedition.lcdui.AlertType;
import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Form;
import javax.microedition.lcdui.StringItem;

import javax.microedition.midlet.*;

public class URLWriter extends MIDlet implements TargetListener, CommandListener {

// Display Stuff
private Command exitCommand;
private Form form;

public URLWriter() {
exitCommand = new Command("Exit", Command.EXIT, 1);
form = new Form("NFC-Research.at: URL Writer");

form.addCommand(exitCommand);
form.setCommandListener(this);
form.append("Touch Tag to write URL");

// Registration of the TargetListener for external contactless
// Targets (in this RFID_TAG).
try {
DiscoveryManager dm = DiscoveryManager.getInstance();
dm.addTargetListener(this, TargetType.NDEF_TAG);

} catch (ContactlessException ce) {
displayAlert("Unable to register TargetListener: " + ce.toString(), AlertType.ERROR);
}

}

public void startApp() {
Display.getDisplay(this).setCurrent(form);
}

public void pauseApp() {
}

public void destroyApp(boolean unconditional) {

}

/**
* Implementation of the Call-Back Function of the TargetListener
* @param targetProperties: Array of Targets found by the Phone
*
*/
public void targetDetected(TargetProperties[] targetProperties) {

// in case no targets found, exit the method
if (targetProperties.length == 0) {
return;
}

// NDEF Connection for write Operation
NDEFTagConnection ndconn = getNDEFTAGConnection(targetProperties);
try {
// Open NDEF Connection to the first Tag found
// ndconn = (NDEFTagConnection) Connector.open(targetProperties[0].getUrl());

// Headerbyte: open Bookmark in Browser
byte[] headerByte = {0x00};

// Payload Text: URL as a byte-Array
byte[] urlBytes = "http://www.nfc-research.com".getBytes();

// Create NDEF Record
NDEFRecord r = new NDEFRecord(new NDEFRecordType(NDEFRecordType.NFC_FORUM_RTD, "urn:nfc:wkt:U"), null, null);

// Append Payload Manually
r.appendPayload(headerByte);
r.appendPayload(urlBytes);

// Create Recoard Array and Add Record
NDEFRecord[] myRecArray = new NDEFRecord[]{r};

// Generate a Message out of the Array
NDEFMessage myMessage = new NDEFMessage(myRecArray);

// Write Message to Tag
ndconn.writeNDEF(myMessage);

displayAlert("Information written", AlertType.INFO);

} catch (IOException io) {
displayAlert("IOException during open() or Write(): " + io.toString(), AlertType.ERROR);
} catch (ContactlessException io) {
displayAlert("ContactlessException during writeNDEF(): " + io.toString(), AlertType.ERROR);
} catch (Exception e) {
displayAlert("Exception: " + e.toString(), AlertType.ERROR);
} // in case of an exception, close connection properly
finally {

// close Connection again
if (ndconn != null) {
try {
ndconn.close();
} catch (IOException ex) {
displayAlert("IOException during close(): " + ex.toString(), AlertType.ERROR);
}
}
}

}

private NDEFTagConnection getNDEFTAGConnection(TargetProperties[] tProp) {
for (int j = 0; j < tProp.length; j++) {
Class[] connections = tProp[j].getConnectionNames();
if (connections != null) {
for (int i = 0; i < connections.length; i++) {
if (connections[i].getName().equals(
"javax.microedition.contactless.ndef.NDEFTagConnection")) {
try {
return (NDEFTagConnection) Connector.open(tProp[0].getUrl(connections[i]));
} catch (Exception e) {
displayAlert("Error writting NDEF: " + e.toString(), AlertType.ERROR);
}
}
}
}
}
return null;
}

/**
* Implementation of the Call-Back function of the CommandListener
* @param command: command key pressed
* @param displayable: associated displayable Object
*/
public void commandAction(Command command, Displayable displayable) {
if (command == exitCommand) {
DiscoveryManager dm = DiscoveryManager.getInstance();
dm.removeTargetListener(this, TargetType.NDEF_TAG);
destroyApp(false);
notifyDestroyed();
}
}

private void displayAlert(String error, AlertType type) {
Alert err = new Alert(form.getTitle(), error, null, type);
Display.getDisplay(this).setCurrent(err, form);
}
}
</code>

@@ Line 14: / Line 14: @@
 |translated-by=[[User:Valderind4]]
 |translated-from-title=NFC URLWriter
-|translated-from-id=51953
+|translated-from-id=51953 <!-- automated guess -->
 |review-by=<!-- After re-review: [[User:username]] -->
 |review-timestamp=<!-- After re-review: YYYYMMDD -->
@@ Line 24: / Line 24: @@
 [[Category:Lang-Portuguese]]
 [[Category:Code Examples]]
 Este código mostra um MIDlet básico que escreve uma URL para uma tag/Transponder externo. (Mostrado no NFC Forum Developer Training, WIMA 2008 e NFC-Congress Hagenberg 2008)

@@ Line 12: / Line 12: @@
 |id= <!-- Article Id (Knowledge base articles only) -->
 |language=Lang-Portuguese
-|translated-by= <!-- [[User: XXXXX]] -->
+|translated-by=[[User:Valderind4]]
-|translated-from-title=<!-- Title only -->
+|translated-from-title=NFC URLWriter
-|translated-from-id= <!-- Id of translated revision -->
+|translated-from-id=51953
 |review-by=<!-- After re-review: [[User:username]] -->
 |review-timestamp=<!-- After re-review: YYYYMMDD -->
@@ Line 20: / Line 20: @@
 |update-timestamp=<!-- After significant update: YYYYMMDD -->
 |creationdate=20090906
-|author=[[User:Valderind4]]
+|author=[[User:Geri-m]]
 }}[[Category:Java ME]]
 [[Category:Lang-Portuguese]]
@@ Line 201: / Line 201: @@
+}
 </code>

@@ Line 1: / Line 1: @@
-[[Category:Java ME]]
+{{ArticleMetaData
 [[Category:Lang-Portuguese]]
 [[Category:Code Examples]]