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Simples exemplo de um PushRegistry NFC

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Por valderind4
Última alteração feita por hamishwillee em 23 Oct 2013

Simples código Java exemplificando o uso da PushRegistry em dispositivos NFC.

package com.nokia.nfc.sample.app;
 
import javax.microedition.contactless.DiscoveryManager;
import javax.microedition.io.PushRegistry;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Form;
import javax.microedition.lcdui.TextField;
import javax.microedition.midlet.MIDlet;
import javax.microedition.midlet.MIDletStateChangeException;
 
// Simple Java code example of using PushRegistry to launch midlet.
public class PushRegistrySimpleExample extends MIDlet {
 
private Form form;
private TextField pushTextField;
private TextField launchTextField;
private DiscoveryManager dm;
 
protected void startApp() throws MIDletStateChangeException {
 
// Create UI
form = new Form("Form");
pushTextField = new TextField("Pushregistration", "", 255,
TextField.UNEDITABLE);
launchTextField = new TextField("Launch type", "", 255,
TextField.UNEDITABLE);
form.append(pushTextField);
form.append(launchTextField);
Display.getDisplay(this).setCurrent(form);
 
try {
// Make list of connections that are already registered
String[] regConns = PushRegistry.listConnections(false);
 
// Boolean to tell if wanted TargetType is already registered
boolean registered = false;
 
// Go trough list to see if wanted TargetType is already registered
for (int i = 0; i < regConns.length; i++) {
if (regConns[i]
.equals("ndef:external_rtd?name=urn:nfc:ext:yourcompany.com:pushexample")) {
registered = true;
}
}
// If TargetType is not registered - register it
if (!registered) {
// Register this MIDlet to be launched when any tag with right
// TargetType is touched
PushRegistry
.registerConnection(
"ndef:external_rtd?name=urn:nfc:ext:yourcompany.com:pushexample",
"com.nokia.nfc.sample.app.PushRegistrySimpleExample",
"*");
pushTextField.setString("Succeeded");
} else {
// If target was already registered write that on screen
pushTextField.setString("Connection already registered");
}
} catch (Exception e) {
// In case of exception write message on screen
pushTextField.setString("Exception: " + e.getMessage());
}
 
// Get instance of NFC Discovery Manager
dm = DiscoveryManager.getInstance();
 
// Show how MIDlet was launched: By touching tag or trough
// phones menu (touch/manual).
String launchType = dm.getProperty("LaunchType");
launchTextField.setString(launchType);
}
 
protected void pauseApp() {
}
 
protected void destroyApp(boolean arg0) throws MIDletStateChangeException {
}
}
This page was last modified on 23 October 2013, at 03:55.
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