NCF タグのすべてのセクターを読み取るプログラムを作成しようとしています。テストを実行すると、次のようになります。
- タグが検出されました
- タグIDを取得します
- セクター数を取得します
しかし、私は最初のセクターしか読めません!
ここに私のコード：
public class MainActivity extends Activity {
public String TAG_LOCAL = "Home - ";
public boolean MODE_DEBUG_LOCAL = true;
NfcAdapter nfcAdapter;
PendingIntent pendingIntent;
IntentFilter[] intentFilter;
String[][] generalTechLists;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
Log.w("ISI", "Main Start");
//detect if NFC device
if (getPackageManager().hasSystemFeature(PackageManager.FEATURE_NFC)) {
Log.w("ISI", "NFC detected");
}else{
Log.w("ISI", "NFC NOT detected");
}
IntentFilter ndef = new IntentFilter(NfcAdapter.ACTION_TECH_DISCOVERED);
try {
ndef.addDataType("*/*");
} catch (MalformedMimeTypeException e) {
Log.w("ISI", " error ndef = " + e.getMessage());
}
intentFilter = new IntentFilter[] {ndef};
generalTechLists = new String[][] { new String[] { MifareClassic.class.getName() } };
nfcAdapter = NfcAdapter.getDefaultAdapter(this);
pendingIntent = PendingIntent.getActivity(this, 0,new Intent(this, getClass()).addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP), 0);
}
@Override
protected void onNewIntent(Intent intent) {
super.onNewIntent(intent);
resolveIntent(intent);
}
void resolveIntent(Intent intent) {
String action = intent.getAction();
if (NfcAdapter.ACTION_TECH_DISCOVERED.equals(action)) {
//Identifiant du tag NFC
byte[] byte_id = intent.getByteArrayExtra(NfcAdapter.EXTRA_ID);
Log.w("ISI", "Tag id = " + ByteArrayToHexString(byte_id));
//techno disponible
Tag tagFromIntent = intent.getParcelableExtra(NfcAdapter.EXTRA_TAG);
String[] techList = tagFromIntent.getTechList();
for (int Cpt = 0; Cpt <techList.length; Cpt++){
Log.w("ISI", "Techno = " + techList[Cpt]);
}
//QUESTION A POSER DANS XDA!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
MifareClassic mfc = MifareClassic.get(tagFromIntent);
try{
mfc.connect();
int size = mfc.getSize();
Log.w("ISI", "size (byte) = " + size);
int nbrSector = mfc.getSectorCount();
Log.w("ISI", "NbrSector = " + nbrSector);
for (int Cpt = 0; Cpt < nbrSector; Cpt++){
boolean auth = mfc.authenticateSectorWithKeyA(Cpt, MifareClassic.KEY_DEFAULT);
if (auth){
int nbrBlock = mfc.getBlockCountInSector(Cpt);
Log.w("ISI", "NbrBlock = " + nbrBlock + " for sector " + Cpt);
for (int k = 0; k < nbrBlock; k++){
byte[] data = mfc.readBlock(k);
Log.w("ISI", "Block num " + k + " - data " + ByteArrayToHexString(data));
}
}else{
Log.w("ISI", " Impossible to connect at sector " + Cpt);
}
}
}catch(IOException e){
Log.w("ISI", " error = " + e.getMessage());
}
}// End of method
}
@Override
protected void onResume() {
super.onResume();
nfcAdapter.enableForegroundDispatch(this, pendingIntent, intentFilter, generalTechLists);
}
private String getHexString(String hex){
StringBuilder output = new StringBuilder();
for (int i = 0; i < hex.length(); i+=2) {
String str = hex.substring(i, i+2);
output.append((char)Integer.parseInt(str, 16));
}
return output.toString();
}
String ByteArrayToHexString(byte[] inarray) {
//Thanks Adam Laurie sur XDA
int i, j, in;
String [] hex = {"0","1","2","3","4","5","6","7","8","9","A","B","C","D","E","F"};
String out= "";
for(j = 0 ; j < inarray.length ; ++j) {
in = (int) inarray[j] & 0xff;
i = (in >> 4) & 0x0f;
out += hex[i];
i = in & 0x0f;
out += hex[i];
}
return out;
}
}
そしてここにログ：
Tag id = C44F0EDD
Techno = android.nfc.tech.MifareClassic
Techno = android.nfc.tech.NfcA
Techno = android.nfc.tech.NdefFormatable
size (byte) = 1024
NbrSector = 16
NbrBlock = 4 for sector 0
Block num 0 - data C44F0EDD58880400C185149849803612
Block num 1 - data 00000000000000000000000000000000
Block num 2 - data 00000000000000000000000000000000
Block num 3 - data 000000000000FF078069FFFFFFFFFFFF
NbrBlock = 4 for sector 1
error = Tag was lost.
だから何が起こるか分からない。
助けてくれてありがとう