android实现通过NFC读取卡号 android实现通过NFC读取卡号

本文实例为大家分享了android通过NFC读取卡号的具体代码，供大家参考，具体内容如下
1.获取权限

2.设置NFC活动页

3.Activity代码

//NFC对象private NfcAdapter mNfcAdapter; private PendingIntent pi;

1.主方法中：

//获取默认的NFC控制器//初始化NfcAdaptermNfcAdapter = NfcAdapter.getDefaultAdapter(this); if (mNfcAdapter == null) {Toast.makeText(AddPointActivity.this, "设备不支持NFC!", Toast.LENGTH_LONG).show(); finish(); return; }if (!mNfcAdapter.isEnabled()) {Toast.makeText(AddPointActivity.this, "请在系统设置中先启用NFC功能!", Toast.LENGTH_LONG).show(); finish(); return; }//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);

2.方法

//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); }}//启动@Overrideprotected void onResume() {super.onResume(); mNfcAdapter.enableForegroundDispatch(this, pi, null, null); }//解析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()); Toast.makeText(AddPointActivity.this, CardId, Toast.LENGTH_LONG).show(); }//转为16进制字符串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; }

运行结果：