NfcAdapter mNfcAdapter;
mNfcAdapter = NfcAdapter.getDefaultAdapter(this);
@Override
protected void onResume() {
super.onResume();
// NfcInstance.onResume(MainActivity.this, getContext());
IntentFilter tagDetected = new IntentFilter(NfcAdapter.ACTION_TAG_DISCOVERED);
IntentFilter ndefDetected = new IntentFilter(NfcAdapter.ACTION_NDEF_DISCOVERED);
IntentFilter techDetected = new IntentFilter(NfcAdapter.ACTION_TECH_DISCOVERED);
IntentFilter[] nfcIntentFilter = new IntentFilter[]{techDetected, tagDetected, ndefDetected};
PendingIntent pendingIntent = PendingIntent.getActivity(
this, 0, new Intent(this, getClass()).addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP), 0);
if (mNfcAdapter != null)
mNfcAdapter.enableForegroundDispatch(this, pendingIntent, nfcIntentFilter, null);
}
@Override
protected void onPause() {
super.onPause();
if (mNfcAdapter != null)
mNfcAdapter.disableForegroundDispatch(this);
// NfcInstance.onPause(MainActivity.this);
}
@Override
protected void onNewIntent(Intent intent) {
super.onNewIntent(intent);
Tag tag = intent.getParcelableExtra(NfcAdapter.EXTRA_TAG);
patchTag(tag);
if (tag != null) {
readFromNFC(tag, intent);
}
// NfcInstance.onNewIntent(intent);
}
public Tag patchTag(Tag oTag) {
if (oTag == null)
return null;
String[] sTechList = oTag.getTechList();
Parcel oParcel, nParcel;
oParcel = Parcel.obtain();
oTag.writeToParcel(oParcel, 0);
oParcel.setDataPosition(0);
int len = oParcel.readInt();
byte[] id = null;
if (len >= 0) {
id = new byte[len];
oParcel.readByteArray(id);
}
int[] oTechList = new int[oParcel.readInt()];
oParcel.readIntArray(oTechList);
Bundle[] oTechExtras = oParcel.createTypedArray(Bundle.CREATOR);
int serviceHandle = oParcel.readInt();
int isMock = oParcel.readInt();
IBinder tagService;
if (isMock == 0) {
tagService = oParcel.readStrongBinder();
} else {
tagService = null;
}
oParcel.recycle();
int nfca_idx = -1;
int mc_idx = -1;
for (int idx = 0; idx < sTechList.length; idx++) {
if (sTechList[idx] == NfcA.class.getName()) {
nfca_idx = idx;
} else if (sTechList[idx] == MifareClassic.class.getName()) {
mc_idx = idx;
}
}
if (nfca_idx >= 0 && mc_idx >= 0 && oTechExtras[mc_idx] == null) {
oTechExtras[mc_idx] = oTechExtras[nfca_idx];
} else {
return oTag;
}
nParcel = Parcel.obtain();
nParcel.writeInt(id.length);
nParcel.writeByteArray(id);
nParcel.writeInt(oTechList.length);
nParcel.writeIntArray(oTechList);
nParcel.writeTypedArray(oTechExtras, 0);
nParcel.writeInt(serviceHandle);
nParcel.writeInt(isMock);
if (isMock == 0) {
nParcel.writeStrongBinder(tagService);
}
nParcel.setDataPosition(0);
Tag nTag = Tag.CREATOR.createFromParcel(nParcel);
nParcel.recycle();
return nTag;
}
private static StringBuilder bytesToString(byte[] bs) {
StringBuilder s = new StringBuilder();
for (byte b : bs) {
s.append(String.format("%02X", b));
}
return s;
}
private void readFromNFC(Tag tag, Intent intent) {
try {
byte[] id1 = tag.getId();
StringBuffer stringBuffer = new StringBuffer();
StringBuilder stringBuilder = bytesToString(id1);
System.out.println("xxxxxxxxx record id1=" + new String(id1) + "stringBuilder=" + stringBuilder.toString());
List<String> list = new ArrayList<>();
for (int k = 0; k < 4; k++) {
list.add(0, String.format("%02X", id1[k]));
}
for (int k = 0; k < list.size(); k++) {
stringBuffer.append(list.get(k));
}
System.out.println("xxxxxxxxx record id1=" + new String(id1) + "stringBuffer=" + stringBuffer.toString());
} catch (Exception e) {
}
}
import android.app.Activity
import android.app.PendingIntent
import android.content.Context
import android.content.Intent
import android.content.IntentFilter
import android.nfc.NfcAdapter
import android.nfc.Tag
import android.nfc.tech.MifareClassic
import android.nfc.tech.NfcA
import android.os.Bundle
import android.os.IBinder
import android.os.Parcel
object NfcInstance {
lateinit var mNfcAdapter: NfcAdapter
@JvmStatic
fun onCreate(context: Context) {
mNfcAdapter = NfcAdapter.getDefaultAdapter(context)
}
@JvmStatic
fun onResume(activity: Activity, context: Context) {
if (mNfcAdapter != null) {
println("xxxxxxxxxxx onResume");
val tagDetected = IntentFilter(NfcAdapter.ACTION_TAG_DISCOVERED)
val ndefDetected = IntentFilter(NfcAdapter.ACTION_NDEF_DISCOVERED)
val techDetected = IntentFilter(NfcAdapter.ACTION_TECH_DISCOVERED)
val nfcIntentFilter = arrayOf(techDetected, tagDetected, ndefDetected)
val pendingIntent = PendingIntent.getActivity(
context, 0, Intent(context, javaClass).addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP), 0
)
if (mNfcAdapter != null) mNfcAdapter.enableForegroundDispatch(
activity,
pendingIntent,
nfcIntentFilter,
null
)
} else {
println("xxxxxxxxxxx onResume null");
}
}
@JvmStatic
fun onPause(activity: Activity) {
println("xxxxxxxxxxx onPause");
if (mNfcAdapter != null) mNfcAdapter.disableForegroundDispatch(activity)
}
@JvmStatic
fun onNewIntent(intent: Intent) {
println("xxxxxxxxxxx onNewIntent");
if (mNfcAdapter != null) {
val tag = intent.getParcelableExtra<Tag>(NfcAdapter.EXTRA_TAG)
patchTag(tag)
tag?.let { readFromNFC(it, intent) }
}
}
private fun bytesToString(bs: ByteArray): StringBuilder {
val s = java.lang.StringBuilder()
for (b in bs) {
s.append(String.format("%02X", b))
}
return s
}
interface OnReadListener {
fun onRead(value: String, sourceValue: String);
}
lateinit var listener: OnReadListener
@JvmStatic
fun setOnReadListener(listener: OnReadListener) {
NfcInstance.listener = listener;
}
private fun readFromNFC(tag: Tag, intent: Intent) {
try {
val id1 = tag.id
val stringBuffer = StringBuffer()
val stringBuilder: StringBuilder = bytesToString(id1)
println("xxxxxxxxx record id1=" + String(id1) + "stringBuilder=" + stringBuilder.toString())
var mutableList = mutableListOf<String>()
var index = 0;
for (k in id1) {
if (index < 4) {
var temp = String.format("%02X", k)
mutableList.add(temp)
index++
break
}
}
mutableList = mutableList.asReversed();
for (k in mutableList) {
stringBuffer.append(k);
}
listener.onRead(stringBuffer.toString(), stringBuilder.toString())
println("xxxxxxxxx record id1=" + String(id1) + "stringBuffer=" + stringBuffer.toString())
} catch (e: Exception) {
e.printStackTrace()
}
}
fun patchTag(oTag: Tag?): Tag? {
if (oTag == null) return null
val sTechList = oTag.techList
val oParcel: Parcel
val nParcel: Parcel
oParcel = Parcel.obtain()
oTag.writeToParcel(oParcel, 0)
oParcel.setDataPosition(0)
val len = oParcel.readInt()
var id: ByteArray? = null
if (len >= 0) {
id = ByteArray(len)
oParcel.readByteArray(id)
}
val oTechList = IntArray(oParcel.readInt())
oParcel.readIntArray(oTechList)
val oTechExtras = oParcel.createTypedArray(Bundle.CREATOR)
val serviceHandle = oParcel.readInt()
val isMock = oParcel.readInt()
val tagService: IBinder?
tagService = if (isMock == 0) {
oParcel.readStrongBinder()
} else {
null
}
oParcel.recycle()
var nfca_idx = -1
var mc_idx = -1
for (idx in sTechList.indices) {
if (sTechList[idx] === NfcA::class.java.name) {
nfca_idx = idx
} else if (sTechList[idx] === MifareClassic::class.java.name) {
mc_idx = idx
}
}
if (nfca_idx >= 0 && mc_idx >= 0 && oTechExtras!![mc_idx] == null) {
oTechExtras[mc_idx] = oTechExtras[nfca_idx]
} else {
return oTag
}
nParcel = Parcel.obtain()
nParcel.writeInt(id!!.size)
nParcel.writeByteArray(id)
nParcel.writeInt(oTechList.size)
nParcel.writeIntArray(oTechList)
nParcel.writeTypedArray(oTechExtras, 0)
nParcel.writeInt(serviceHandle)
nParcel.writeInt(isMock)
if (isMock == 0) {
nParcel.writeStrongBinder(tagService)
}
nParcel.setDataPosition(0)
val nTag = Tag.CREATOR.createFromParcel(nParcel)
nParcel.recycle()
return nTag
}
}
<?xml version="1.0" encoding="utf-8"?>
<resources xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
<tech-list>
<tech>android.nfc.tech.IsoDep</tech>
</tech-list>
</resources>
<uses-permission android:name="android.permission.NFC" />
<uses-feature
android:name="android.hardware.nfc"
android:required="true" />
<activity
android:launchMode="singleTask"
android:name=".choose_role.ChooseRoleActivity"
android:screenOrientation="landscape">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
<intent-filter>
<action android:name="android.nfc.action.TECH_DISCOVERED" />
<category android:name="android.intent.category.DEFAULT" />
</intent-filter>
<meta-data
android:name="android.nfc.action.TECH_DISCOVERED"
android:resource="@xml/nfc_tech_filter" />
</activity>