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저는 NFC가 처음입니다. NFC 태그로 NFC 사용 가능 Android 폰을 원하고 NFC 리더를 사용하여 데이터를 읽으려고합니다. 데이터 전송을 위해 이미 NFC 앱을 만들거나 NFC 리더 하드웨어를 함께 사용해야한다고 제안 할 수 있다면 정말 좋을 것입니다.NFC가 가능한 안드로이드 스마트 폰을 NFC 태그로 사용하고 nfc 리더를 사용하여 데이터를 수신하십시오.
저는 NFC가 처음입니다. NFC 태그로 NFC 사용 가능 Android 폰을 원하고 NFC 리더를 사용하여 데이터를 읽으려고합니다. 데이터 전송을 위해 이미 NFC 앱을 만들거나 NFC 리더 하드웨어를 함께 사용해야한다고 제안 할 수 있다면 정말 좋을 것입니다.NFC가 가능한 안드로이드 스마트 폰을 NFC 태그로 사용하고 nfc 리더를 사용하여 데이터를 수신하십시오.
이것은 내 NFC 송수신 코드입니다.
MainActivity이 내 수신 화면입니다, 몇 가지 추가 코드가있을 수 있지만, 당신이
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);
}
}
당신이 오류에 직면 알려줘 제거 할 수있는 파일
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);
}
}
를 보냅니다.