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   源码介绍

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手机NFC测试软件

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();  
    } 


}