Ich bin neu in NFC Ich möchte NFC-fähigen Android-Handy als NFC-Tag und lesen Sie seine Daten mit NFC-Reader. Es wäre wirklich toll, wenn Sie mir die bereits erstellten NFC-Apps zum Senden von Daten oder der NFC-Reader-Hardware vorschlagen könnten.Verwenden Sie NFC-fähigen Android-Smartphone als NFC-Tag und erhalten Sie Daten mit NFC-Leser
Dies ist mein NFC Sende- und Empfangscode.
MainActivity sendet Dateien
public class MainActivity extends AppCompatActivity {
NfcAdapter nfcAdapter;
private PendingIntent mPendingIntent;
private IntentFilter[] mIntentFilters;
private String[][] mNFCTechLists;
private TextView mTextView;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
nfcAdapter = NfcAdapter.getDefaultAdapter(this);
mTextView = (TextView)findViewById(R.id.recive_text);
PackageManager pm = this.getPackageManager();
// Check whether NFC is available on device
if (!pm.hasSystemFeature(PackageManager.FEATURE_NFC)) {
// NFC is not available on the device.
Toast.makeText(this, "The device does not has NFC hardware.",
Toast.LENGTH_SHORT).show();
}
// Check whether device is running Android 4.1 or higher
else if (Build.VERSION.SDK_INT < Build.VERSION_CODES.JELLY_BEAN) {
// Android Beam feature is not supported.
Toast.makeText(this, "Android Beam is not supported.",
Toast.LENGTH_SHORT).show();
}
else {
// NFC and Android Beam file transfer is supported.
Toast.makeText(this, "Android Beam is supported on your device.",
Toast.LENGTH_SHORT).show();
}
// create an intent with tag data and deliver to this activity
mPendingIntent = PendingIntent.getActivity(this, 0,
new Intent(this, getClass()).addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP), 0);
// set an intent filter for all MIME data
IntentFilter ndefIntent = new IntentFilter(NfcAdapter.ACTION_NDEF_DISCOVERED);
try {
ndefIntent.addDataType("*/*");
mIntentFilters = new IntentFilter[] { ndefIntent };
} catch (Exception e) {
Log.e("TagDispatch", e.toString());
}
mNFCTechLists = new String[][] { new String[] { NfcF.class.getName() } };
}
public void sendFile(View view) {
// Check whether NFC is enabled on device
if(!nfcAdapter.isEnabled()){
// NFC is disabled, show the settings UI
// to enable NFC
Toast.makeText(this, "Please enable NFC.",
Toast.LENGTH_SHORT).show();
startActivity(new Intent(Settings.ACTION_NFC_SETTINGS));
}
// Check whether Android Beam feature is enabled on device
else if(!nfcAdapter.isNdefPushEnabled()) {
// Android Beam is disabled, show the settings UI
// to enable Android Beam
Toast.makeText(this, "Please enable Android Beam.",
Toast.LENGTH_SHORT).show();
startActivity(new Intent(Settings.ACTION_NFCSHARING_SETTINGS));
}
else {
Intent chooseFile = new Intent(Intent.ACTION_GET_CONTENT);
chooseFile.setType("*/*");
chooseFile = Intent.createChooser(chooseFile, "Choose a file");
startActivityForResult(chooseFile, 1);
}
}
@Override
protected void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (data!=null) {
Uri uri = data.getData();
nfcAdapter.setBeamPushUris(new Uri[]{uri}, this);
} else {
Toast.makeText(this,"Please choose a file",Toast.LENGTH_SHORT).show();
}
}
public void nextScreen(View view){
startActivity(new Intent(MainActivity.this,SecondActivity.class));
}
public void reciveScreen(View view){
startActivity(new Intent(MainActivity.this,RecieveScreen.class));
}
@Override
public void onNewIntent(Intent intent) {
String action = intent.getAction();
Tag tag = intent.getParcelableExtra(NfcAdapter.EXTRA_TAG);
String s = action + "\n\n" + tag.toString();
// parse through all NDEF messages and their records and pick text type only
Parcelable[] data = intent.getParcelableArrayExtra(NfcAdapter.EXTRA_NDEF_MESSAGES);
if (data != null) {
try {
for (int i = 0; i < data.length; i++) {
NdefRecord[] recs = ((NdefMessage)data[i]).getRecords();
for (int j = 0; j < recs.length; j++) {
if (recs[j].getTnf() == NdefRecord.TNF_WELL_KNOWN &&
Arrays.equals(recs[j].getType(), NdefRecord.RTD_TEXT)) {
byte[] payload = recs[j].getPayload();
String textEncoding = ((payload[0] & 0200) == 0) ? "UTF-8" : "UTF-16";
int langCodeLen = payload[0] & 0077;
s += ("\n\nNdefMessage[" + i + "], NdefRecord[" + j + "]:\n\"" +
new String(payload, langCodeLen + 1,
payload.length - langCodeLen - 1, textEncoding) +
"\"");
}
}
}
} catch (Exception e) {
Log.e("TagDispatch", e.toString());
}
}
mTextView.setText(s);
}
@Override
public void onResume() {
super.onResume();
if (nfcAdapter != null)
nfcAdapter.enableForegroundDispatch(this, mPendingIntent, mIntentFilters, mNFCTechLists);
}
@Override
public void onPause() {
super.onPause();
if (nfcAdapter != null)
nfcAdapter.disableForegroundDispatch(this);
}
}
Dies ist mein Empfangs Bildschirm, kann es einige zusätzliche Code sein, aber Sie können es entfernen
public class RecieveScreen extends AppCompatActivity {
private TextView mTextView;
private NfcAdapter mNfcAdapter;
private PendingIntent mPendingIntent;
private IntentFilter[] mIntentFilters;
private String[][] mNFCTechLists;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_recieve_screen);
mTextView = (TextView)findViewById(R.id.recieve_tv);
mNfcAdapter = NfcAdapter.getDefaultAdapter(this);
if (mNfcAdapter != null) {
mTextView.setText("Read an NFC tag");
} else {
mTextView.setText("This phone is not NFC enabled.");
}
// create an intent with tag data and deliver to this activity
mPendingIntent = PendingIntent.getActivity(this, 0,
new Intent(this, getClass()).addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP), 0);
// set an intent filter for all MIME data
IntentFilter ndefIntent = new IntentFilter(NfcAdapter.ACTION_NDEF_DISCOVERED);
try {
ndefIntent.addDataType("*/*");
mIntentFilters = new IntentFilter[] { ndefIntent };
} catch (Exception e) {
Log.e("TagDispatch", e.toString());
}
mNFCTechLists = new String[][] { new String[] { NfcF.class.getName() } };
}
@Override
public void onNewIntent(Intent intent) {
String action = intent.getAction();
Tag tag = intent.getParcelableExtra(NfcAdapter.EXTRA_TAG);
String s = action + "\n\n" + tag.toString();
// parse through all NDEF messages and their records and pick text type only
Parcelable[] data = intent.getParcelableArrayExtra(NfcAdapter.EXTRA_NDEF_MESSAGES);
if (data != null) {
try {
for (int i = 0; i < data.length; i++) {
NdefRecord[] recs = ((NdefMessage)data[i]).getRecords();
for (int j = 0; j < recs.length; j++) {
if (recs[j].getTnf() == NdefRecord.TNF_WELL_KNOWN &&
Arrays.equals(recs[j].getType(), NdefRecord.RTD_TEXT)) {
byte[] payload = recs[j].getPayload();
String textEncoding = ((payload[0] & 0200) == 0) ? "UTF-8" : "UTF-16";
int langCodeLen = payload[0] & 0077;
s += ("\n\nNdefMessage[" + i + "], NdefRecord[" + j + "]:\n\"" +
new String(payload, langCodeLen + 1,
payload.length - langCodeLen - 1, textEncoding) +
"\"");
}
}
}
} catch (Exception e) {
Log.e("TagDispatch", e.toString());
}
}
mTextView.setText(s);
}
@Override
public void onResume() {
super.onResume();
if (mNfcAdapter != null)
mNfcAdapter.enableForegroundDispatch(this, mPendingIntent, mIntentFilters, mNFCTechLists);
}
@Override
public void onPause() {
super.onPause();
if (mNfcAdapter != null)
mNfcAdapter.disableForegroundDispatch(this);
}
}
Lassen Sie mich wissen, wenn Sie irgendwelche Fehler konfrontiert.