import java.io.IOException;
import java.nio.charset.Charset;
import android.content.Context;
import android.nfc.FormatException;
import android.nfc.NdefMessage;
import android.nfc.NdefRecord;
import android.nfc.Tag;
import android.nfc.TagLostException;
import android.nfc.tech.Ndef;
import android.nfc.tech.NdefFormatable;
import android.widget.Toast;
public class NFC {
public static boolean writeTag(Context context, Tag tag) {
NdefRecord relayRecord =new NdefRecord(
NdefRecord.TNF_ABSOLUTE_URI ,
"zoeice://com.zoeice.example/applicationUp".getBytes(Charset.forName("US-ASCII")),
newbyte[0], new byte[0]);
// Complete NDEF messagewith both records
NdefMessage message = newNdefMessage(new NdefRecord[] {relayRecord});
try {
// If the tag is already formatted, just writethe message to it
Ndef ndef = Ndef.get(tag);
if(ndef != null) {
ndef.connect();
// Makesure the tag is writable
if(!ndef.isWritable()) {
Toast.makeText(context, "nfcReadOnlyErrorTitle", Toast.LENGTH_SHORT).show();
return false;
}
// Check ifthere's enough space on the tag for the message
int size =message.toByteArray().length;
if(ndef.getMaxSize() < size) {
Toast.makeText(context, "nfcReadOnlyErrorTitle", Toast.LENGTH_SHORT).show();
return false;
}
try {
// Write the data to thetag
ndef.writeNdefMessage(message);
Toast.makeText(context,"nfcWrittenTitle", Toast.LENGTH_SHORT ).show();
return true;
} catch(TagLostException tle) {
Toast.makeText(context, "nfcTagLostErrorTitle", Toast.LENGTH_SHORT).show();
return false;
} catch(IOException ioe) {
Toast.makeText(context, "nfcFormattingErrorTitle",Toast.LENGTH_SHORT ).show();
return false;
} catch(FormatException fe) {
Toast.makeText(context, "nfcFormattingErrorTitle",Toast.LENGTH_SHORT ).show();
return false;
}
// If the tag is not formatted, format it withthe message
} else {
NdefFormatable format =NdefFormatable.get(tag);
if(format!= null) {
try {
format.connect();
format.format(message);
Toast.makeText(context, "nfcWrittenTitle",Toast.LENGTH_SHORT ).show();
return true;
} catch (TagLostException tle){
Toast.makeText(context,"nfcTagLostErrorTitle", Toast.LENGTH_SHORT ).show();
return false;
} catch (IOException ioe){
Toast.makeText(context,"nfcFormattingErrorTitle", Toast.LENGTH_SHORT ).show();
return false;
} catch (FormatException fe){
Toast.makeText(context,"nfcFormattingErrorTitle", Toast.LENGTH_SHORT ).show();
return false;
}
} else{
Toast.makeText(context, "nfcNoNdefErrorTitle", Toast.LENGTH_SHORT).show();
return false;
}
}
} catch(Exception e){
Toast.makeText(context,"nfcUnknownErrorTitle", Toast.LENGTH_SHORT ).show();
}
return false;
}
}
识别Tag的方法是在AndroidManifest.xml中加入：
