Android读取NfcA，TypeA类型的卡片抛Tag was Lost的异常。nfcaTag.transceive(cmd)中的Apdu命令怎么写

太坑不好 2014-12-23 11:23:12

用安卓的nfc现在读取一个标签，是NfcA类型，TypeA类型的卡片。
得到的Tag是：

android.nfc.tech.NfcA

下面是主程序：

package com.Qing.nfctest1;



import java.io.IOException;



import android.nfc.NfcAdapter;

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.nfc.tech.NfcF;

import android.os.Bundle;

import android.os.Parcelable;

import android.app.Activity;

import android.app.PendingIntent;

import android.content.Intent;

import android.content.IntentFilter;

import android.content.IntentFilter.MalformedMimeTypeException;

import android.util.Log;

import android.view.Menu;

import android.widget.TextView;

import android.widget.Toast;



public class MainActivity extends Activity {

	private NfcAdapter mNfcAdapter;

	private TextView cardNoTxt;

	private Boolean firstRun=true;

	@Override

	protected void onCreate(Bundle savedInstanceState) {

		super.onCreate(savedInstanceState);

		setContentView(R.layout.activity_main);

		cardNoTxt=(TextView)this.findViewById(R.id.cardNoTxt);

		mNfcAdapter=NfcAdapter.getDefaultAdapter(this);

		if (mNfcAdapter == null) {

            Toast.makeText(this, "NFC is not available", Toast.LENGTH_LONG).show();

           // finish();

            return;

        }

		 //mNfcAdapter.setNdefPushMessageCallback(this, this);

	}



	@Override

	public boolean onCreateOptionsMenu(Menu menu) {

		// Inflate the menu; this adds items to the action bar if it is present.

		getMenuInflater().inflate(R.menu.main, menu);

		return true;

	}

	@Override

	public void onNewIntent(Intent intent) {//响应intent

	    Tag tagFromIntent = intent.getParcelableExtra(NfcAdapter.EXTRA_TAG);

	    System.out.println("tagFromIntent..."+tagFromIntent.toString());

	    processTag(intent);

	    //do something with tagFromIntent

	}

	@Override

    public void onResume() {//响应intent

        super.onResume();

        Intent intent=getIntent();

        // new Intent(this, getClass()).addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP)

        if(firstRun){//当第一次运行时,把应用注册成nfc tagdiscover intent的处理程序

	        PendingIntent pendingIntent = PendingIntent.getActivity(

				    this, 0,intent, 0);

			IntentFilter ndef = new IntentFilter(NfcAdapter.ACTION_NDEF_DISCOVERED);

			IntentFilter techIntent=new IntentFilter(NfcAdapter.ACTION_TECH_DISCOVERED);

			IntentFilter tagIntent=new IntentFilter(NfcAdapter.ACTION_TAG_DISCOVERED);

			String[][] techListsArray = new String[][] { new String[] { NfcF.class.getName(),NfcA.class.getName()//程序可处理的tech类型

					,MifareClassic.class.getName(),MifareUltralight.class.getName()} };

		    try {

		        ndef.addDataType("*/*");    /* Handles all MIME based dispatches.

		                                       You should specify only the ones that you need. */

		    }catch (MalformedMimeTypeException e) {

		        throw new RuntimeException("fail", e);

		    }

		    IntentFilter[] intentFiltersArray = new IntentFilter[] {ndef, techIntent,tagIntent};

		    mNfcAdapter.enableForegroundDispatch(this, pendingIntent, intentFiltersArray, techListsArray);//

		    firstRun=false;

        }

        Log.i("NFCOnResume",intent.getAction());

        // Check to see that the Activity started due to an Android Beam

        if (NfcAdapter.ACTION_TECH_DISCOVERED.equals(intent.getAction())) {

        	processTechDiscover(intent);

        }else if(NfcAdapter.ACTION_TAG_DISCOVERED.equals(intent.getAction())){

        	processTagDiscover(intent);

        }else if(NfcAdapter.ACTION_NDEF_DISCOVERED.equals(intent.getAction())){

        	processNdefDiscover(intent);

        }

    }

	public void processTag(Intent intent){//处理tag

		String str="";

		Boolean isNdef=false;

		Tag tagFromIntent = intent.getParcelableExtra(NfcAdapter.EXTRA_TAG);

		str+="Tech List:"+tagFromIntent.getTechList()[0]+"\n";//打印卡的技术列表

		byte[] aa=tagFromIntent.getId();

		str+="Card UID:"+bytesToHexString(aa)+"\n";//获取卡的UID

		for(String tech:tagFromIntent.getTechList()){

			if(tech.equals("android.nfc.tech.NfcA")){

				isNdef=true;

			}

		}

		if(isNdef){

			NfcA nfcaTag=NfcA.get((Tag) intent.getParcelableExtra(NfcAdapter.EXTRA_TAG));//我们的厂牌是NfcA技术,所以生成一个NfcaTag

			

			try {

				//ndefTag.connect();

				nfcaTag.connect();//连接卡

				String atqa="";

				for(byte tmpByte:nfcaTag.getAtqa())

				{

					atqa+=tmpByte;

				}

				str+="tag Atqa:"+bytesToHexString(nfcaTag.getAtqa())+"\n";//获取卡的atqa

				str+="tag SAK:"+nfcaTag.getSak()+"\n";//获取卡的sak

				str+="max len:"+nfcaTag.getMaxTransceiveLength()+"\n";//获取卡片能接收的最大指令长度

				byte[] cmd=null;

				//cmd=new byte[]{0x41,0x54,0x4D,0x0A,0x52,0x01,0x00,0x01,(byte) 0xff,(byte)0xff,(byte)0xFF,(byte)0xFF,(byte)0xFF,(byte)0xFF,0x0D};

cmd=new byte[]{0x60,0x08,0xff,0xff,0xff,0xff,0xff,0xff};//卡请求

  //TypeA 类型的第一个数据是0x60，我要想读的扇区是第2扇区的第0块，

//也就是第8块的数据，KeyA密码是六个字节的0xff,0xff,0xff,0xff,0xff,0xff

				str+="Card Number:"+nfcaTag.transceive(cmd);

//发送命令到卡片(找不到这个标签扇区读取指令,有知道的同学告诉一声我们的卡是ISO/IEC 14443 typeA标准的)，主要就是这个方法得不到返回的结果。因为指令不正确

			} catch (Exception e) {

				e.printStackTrace();

			}finally{

				try {

					nfcaTag.close();

				} catch (IOException e) {

					e.printStackTrace();

				}

			}

		}

		cardNoTxt.setText(str);

	}

	//字符序列转换为16进制字符串

		private String bytesToHexString(byte[] src) {

			StringBuilder stringBuilder = new StringBuilder("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.forDigit((src[i] >>> 4) & 0x0F, 16);

				buffer[1] = Character.forDigit(src[i] & 0x0F, 16);

				System.out.println(buffer);

				stringBuilder.append(buffer);

			}

			return stringBuilder.toString();

		}