Android实现读取NFC卡卡号示例,具体如下:
1.权限
<uses-permission android:name="android.permission.NFC" /><uses-featureandroid:name="android.hardware.nfc"android:required="true" />
2.注册(静态)
<intent-filter><action android:name="android.nfc.action.TAG_DISCOVERED" /><data android:mimeType="text/plain" /></intent-filter>
3.Activity
初始化
//初始化NfcAdaptermNfcAdapter = NfcAdapter.getDefaultAdapter(this);// 初始化PendingIntent,当有NFC设备连接上的时候,就交给当前Activity处理pi = PendingIntent.getActivity(this, 0, new Intent(this, getClass()).addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP), 0);
启动
@Overrideprotected void onResume() {super.onResume();mNfcAdapter.enableForegroundDispatch(this, pi, null, null); //启动}获取数据
@Overrideprotected void onNewIntent(Intent intent) {super.onNewIntent(intent);// 当前app正在前端界面运行,这个时候有intent发送过来,那么系统就会调用onNewIntent回调方法,将intent传送过来// 我们只需要在这里检验这个intent是否是NFC相关的intent,如果是,就调用处理方法if (NfcAdapter.ACTION_TAG_DISCOVERED.equals(intent.getAction())) {processIntent(intent);}}解析
/** * Parses the NDEF Message from the intent and prints to the TextView */private void processIntent(Intent intent) {//取出封装在intent中的TAGTag tagFromIntent = intent.getParcelableExtra(NfcAdapter.EXTRA_TAG);String CardId =ByteArrayToHexString(tagFromIntent.getId());}private String ByteArrayToHexString(byte[] inarray) {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;}4.完整参考
<?xml version="1.0" encoding="utf-8"?><manifest xmlns:android="http://schemas.android.com/apk/res/android"package="cn.com.jslh.zjcdprogrect"><uses-permission android:name="android.permission.NFC" /><uses-permission android:name="android.permission.INTERNET" /><uses-featureandroid:name="android.hardware.nfc"android:required="true" /><applicationandroid:name=".common.MyApplication"android:allowBackup="true"android:icon="@mipmap/ic_launcher"android:label="@string/app_name"android:roundIcon="@mipmap/ic_launcher_round"android:supportsRtl="true"android:theme="@style/AppTheme"><activity android:name=".LoginActivity"><intent-filter><action android:name="android.intent.action.MAIN" /><category android:name="android.intent.category.LAUNCHER" /></intent-filter></activity><activity android:name=".saoka.WorkActivity"><intent-filter><action android:name="android.nfc.action.TAG_DISCOVERED" /><data android:mimeType="text/plain" /></intent-filter><!--<meta-data android:name="android.nfc.action.TECH_DISCOVERED" android:resource="@xml/nfc_tech_filter" />--></activity></application></manifest>
package cn.com.jslh.zjcdprogrect.saoka;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.os.Bundle;import android.support.v7.app.AppCompatActivity;import cn.com.jslh.zjcdprogrect.R;public class WorkActivity extends AppCompatActivity {private NfcAdapter mNfcAdapter;private PendingIntent pi;private IntentFilter tagDetected;@Overrideprotected void onCreate(Bundle savedInstanceState) {super.onCreate(savedInstanceState);setContentView(R.layout.activity_work);//初始化NfcAdaptermNfcAdapter = NfcAdapter.getDefaultAdapter(this);//初始化PendingIntent// 初始化PendingIntent,当有NFC设备连接上的时候,就交给当前Activity处理pi = PendingIntent.getActivity(this, 0, new Intent(this, getClass()).addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP), 0);// 新建IntentFilter,使用的是第二种的过滤机制//tagDetected = new IntentFilter(NfcAdapter.ACTION_TECH_DISCOVERED);//tagDetected.addCategory(Intent.CATEGORY_DEFAULT);}@Overrideprotected void onNewIntent(Intent intent) {super.onNewIntent(intent);// 当前app正在前端界面运行,这个时候有intent发送过来,那么系统就会调用onNewIntent回调方法,将intent传送过来// 我们只需要在这里检验这个intent是否是NFC相关的intent,如果是,就调用处理方法if (NfcAdapter.ACTION_TAG_DISCOVERED.equals(intent.getAction())) {processIntent(intent);}}@Overrideprotected void onResume() {super.onResume();mNfcAdapter.enableForegroundDispatch(this, pi, null, null);}/** * Parses the NDEF Message from the intent and prints to the TextView */private void processIntent(Intent intent) {//取出封装在intent中的TAGTag tagFromIntent = intent.getParcelableExtra(NfcAdapter.EXTRA_TAG);String CardId =ByteArrayToHexString(tagFromIntent.getId());}public static void startActivity(Context context){Intent intent = new Intent();intent.setClass(context,WorkActivity.class);context.startActivity(intent);}private String ByteArrayToHexString(byte[] inarray) {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;}}以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持脚本之家。