实例介绍
【实例简介】手机NFC测试软件
【实例截图】
【核心代码】package com.nfc.test;
import java.nio.charset.Charset;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.app.PendingIntent;
import android.content.Intent;
import android.content.IntentFilter;
import android.nfc.NdefMessage;
import android.nfc.NdefRecord;
import android.nfc.NfcAdapter;
import android.nfc.NfcAdapter.CreateNdefMessageCallback;
import android.nfc.NfcEvent;
import android.nfc.Tag;
import android.nfc.tech.MifareClassic;
import android.nfc.tech.MifareUltralight;
import android.nfc.tech.Ndef;
import android.nfc.tech.NfcA;
import android.os.Bundle;
import android.os.Parcelable;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
@SuppressLint("NewApi")
public class ReadTag extends Activity implements CreateNdefMessageCallback{
NfcAdapter nfcAdapter;
TextView promt;
private PendingIntent pendingIntent;
private IntentFilter[] mFilters;
private String[][] mTechLists;
private boolean isFirst = true;
private Button mJumpTagBtn;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.read_tag);
promt = (TextView)this.findViewById(R.id.promt);
mJumpTagBtn = (Button) findViewById(R.id.jump);
mJumpTagBtn.setOnClickListener(new WriteBtnOnClick());
// 获取默认的NFC控制器
nfcAdapter = NfcAdapter.getDefaultAdapter(this);
if (nfcAdapter == null) {
promt.setText("设备不支持NFC!");
finish();
return;
}
if (!nfcAdapter.isEnabled()) {
promt.setText("请在系统设置中先启用NFC功能!");
finish();
return;
}
pendingIntent = PendingIntent.getActivity(this, 0, new Intent(this,
getClass()).addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP), 0);
IntentFilter ndef = new IntentFilter(NfcAdapter.ACTION_TECH_DISCOVERED);
ndef.addCategory("*/*");
mFilters = new IntentFilter[] { ndef };// 过滤器
mTechLists = new String[][] {
new String[] { MifareClassic.class.getName() },
new String[] { NfcA.class.getName() },
new String[] { Ndef.class.getName()},
new String[] { MifareUltralight.class.getName()}
};// 允许扫描的标签类型
nfcAdapter.setNdefPushMessageCallback(this,this);
}
@Override
protected void onResume() {
super.onResume();
nfcAdapter.enableForegroundDispatch(this, pendingIntent, mFilters,
mTechLists);
if (NfcAdapter.ACTION_TECH_DISCOVERED.equals(getIntent().getAction())) {
processIntent(getIntent());
//promt.setText(result);
}
}
@SuppressWarnings("finally")
@SuppressLint("NewApi")
private void processIntent(Intent intent) {
Tag tagFromIntent = intent.getParcelableExtra(NfcAdapter.EXTRA_TAG);
for (String tech : tagFromIntent.getTechList()) {
System.out.println(tech);
}
Parcelable[] rawMsgs = intent
.getParcelableArrayExtra(NfcAdapter.EXTRA_NDEF_MESSAGES);
// only one message sent during the beam
NdefMessage msg = (NdefMessage) rawMsgs[0];
// record 0 contains the MIME type, record 1 is the AAR, if present
promt.setText(new String(msg.getRecords()[0].getPayload()) "\n");
promt.append(bytesToHexString(tagFromIntent.getId(),false));
}
class WriteBtnOnClick implements OnClickListener {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
switch (v.getId()) {
case R.id.jump:
Intent intent = new Intent(ReadTag.this, WriteTag.class);
startActivity(intent);
default:
break;
}
}
}
@Override
public NdefMessage createNdefMessage(NfcEvent event) {
// TODO Auto-generated method stub
String text =("Beam me up, Android!\n\n"
"Beam Time: " System.currentTimeMillis());
NdefMessage msg =new NdefMessage(
new NdefRecord[]{ createMimeRecord(
"application/vnd.com.example.android.beam", text.getBytes())
//,NdefRecord.createApplicationRecord("com.example.android.beam")
});
return msg;
}
@Override
public void onNewIntent(Intent intent){
// onResume gets called after this to handle the intent
setIntent(intent);
}
public NdefRecord createMimeRecord(String mimeType, byte[] payload) {
byte[] mimeBytes = mimeType.getBytes(Charset.forName("US-ASCII"));
NdefRecord mimeRecord = new NdefRecord(
NdefRecord.TNF_MIME_MEDIA, mimeBytes, new byte[0], payload);
return mimeRecord;
}
private String bytesToHexString(byte[] src, boolean isPrefix) {
StringBuilder stringBuilder = new StringBuilder();
if (isPrefix == true) {
stringBuilder.append("0x");
}
if (src == null || src.length <= 0) {
return null;
}
char[] buffer = new char[2];
for (int i = 0; i < src.length; i ) {
buffer[0] = Character.toUpperCase(Character.forDigit(
(src[i] >>> 4) & 0x0F, 16));
buffer[1] = Character.toUpperCase(Character.forDigit(src[i] & 0x0F,
16));
System.out.println(buffer);
stringBuilder.append(buffer);
if (i<src.length-1) {
stringBuilder.append(":");
}
}
return stringBuilder.toString();
}
}
【实例截图】
【核心代码】package com.nfc.test;
import java.nio.charset.Charset;
import android.annotation.SuppressLint;
import android.app.Activity;
import android.app.PendingIntent;
import android.content.Intent;
import android.content.IntentFilter;
import android.nfc.NdefMessage;
import android.nfc.NdefRecord;
import android.nfc.NfcAdapter;
import android.nfc.NfcAdapter.CreateNdefMessageCallback;
import android.nfc.NfcEvent;
import android.nfc.Tag;
import android.nfc.tech.MifareClassic;
import android.nfc.tech.MifareUltralight;
import android.nfc.tech.Ndef;
import android.nfc.tech.NfcA;
import android.os.Bundle;
import android.os.Parcelable;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;
@SuppressLint("NewApi")
public class ReadTag extends Activity implements CreateNdefMessageCallback{
NfcAdapter nfcAdapter;
TextView promt;
private PendingIntent pendingIntent;
private IntentFilter[] mFilters;
private String[][] mTechLists;
private boolean isFirst = true;
private Button mJumpTagBtn;
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.read_tag);
promt = (TextView)this.findViewById(R.id.promt);
mJumpTagBtn = (Button) findViewById(R.id.jump);
mJumpTagBtn.setOnClickListener(new WriteBtnOnClick());
// 获取默认的NFC控制器
nfcAdapter = NfcAdapter.getDefaultAdapter(this);
if (nfcAdapter == null) {
promt.setText("设备不支持NFC!");
finish();
return;
}
if (!nfcAdapter.isEnabled()) {
promt.setText("请在系统设置中先启用NFC功能!");
finish();
return;
}
pendingIntent = PendingIntent.getActivity(this, 0, new Intent(this,
getClass()).addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP), 0);
IntentFilter ndef = new IntentFilter(NfcAdapter.ACTION_TECH_DISCOVERED);
ndef.addCategory("*/*");
mFilters = new IntentFilter[] { ndef };// 过滤器
mTechLists = new String[][] {
new String[] { MifareClassic.class.getName() },
new String[] { NfcA.class.getName() },
new String[] { Ndef.class.getName()},
new String[] { MifareUltralight.class.getName()}
};// 允许扫描的标签类型
nfcAdapter.setNdefPushMessageCallback(this,this);
}
@Override
protected void onResume() {
super.onResume();
nfcAdapter.enableForegroundDispatch(this, pendingIntent, mFilters,
mTechLists);
if (NfcAdapter.ACTION_TECH_DISCOVERED.equals(getIntent().getAction())) {
processIntent(getIntent());
//promt.setText(result);
}
}
@SuppressWarnings("finally")
@SuppressLint("NewApi")
private void processIntent(Intent intent) {
Tag tagFromIntent = intent.getParcelableExtra(NfcAdapter.EXTRA_TAG);
for (String tech : tagFromIntent.getTechList()) {
System.out.println(tech);
}
Parcelable[] rawMsgs = intent
.getParcelableArrayExtra(NfcAdapter.EXTRA_NDEF_MESSAGES);
// only one message sent during the beam
NdefMessage msg = (NdefMessage) rawMsgs[0];
// record 0 contains the MIME type, record 1 is the AAR, if present
promt.setText(new String(msg.getRecords()[0].getPayload()) "\n");
promt.append(bytesToHexString(tagFromIntent.getId(),false));
}
class WriteBtnOnClick implements OnClickListener {
@Override
public void onClick(View v) {
// TODO Auto-generated method stub
switch (v.getId()) {
case R.id.jump:
Intent intent = new Intent(ReadTag.this, WriteTag.class);
startActivity(intent);
default:
break;
}
}
}
@Override
public NdefMessage createNdefMessage(NfcEvent event) {
// TODO Auto-generated method stub
String text =("Beam me up, Android!\n\n"
"Beam Time: " System.currentTimeMillis());
NdefMessage msg =new NdefMessage(
new NdefRecord[]{ createMimeRecord(
"application/vnd.com.example.android.beam", text.getBytes())
//,NdefRecord.createApplicationRecord("com.example.android.beam")
});
return msg;
}
@Override
public void onNewIntent(Intent intent){
// onResume gets called after this to handle the intent
setIntent(intent);
}
public NdefRecord createMimeRecord(String mimeType, byte[] payload) {
byte[] mimeBytes = mimeType.getBytes(Charset.forName("US-ASCII"));
NdefRecord mimeRecord = new NdefRecord(
NdefRecord.TNF_MIME_MEDIA, mimeBytes, new byte[0], payload);
return mimeRecord;
}
private String bytesToHexString(byte[] src, boolean isPrefix) {
StringBuilder stringBuilder = new StringBuilder();
if (isPrefix == true) {
stringBuilder.append("0x");
}
if (src == null || src.length <= 0) {
return null;
}
char[] buffer = new char[2];
for (int i = 0; i < src.length; i ) {
buffer[0] = Character.toUpperCase(Character.forDigit(
(src[i] >>> 4) & 0x0F, 16));
buffer[1] = Character.toUpperCase(Character.forDigit(src[i] & 0x0F,
16));
System.out.println(buffer);
stringBuilder.append(buffer);
if (i<src.length-1) {
stringBuilder.append(":");
}
}
return stringBuilder.toString();
}
}
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