基于UNIAPP整合NFC功能（安卓端）

在你的JS类库创建一个nfc.js(名字随你),写入一下代码：

var NfcAdapter;
export default {
    // 初始化NFC
    NFCInit() {
        try {
            let main2 = plus.android.runtimeMainActivity();
            let Intent = plus.android.importClass('android.content.Intent');
            let Activity = plus.android.importClass('android.app.Activity');
            let PendingIntent = plus.android.importClass('android.app.PendingIntent');
            let IntentFilter2 = plus.android.importClass('android.content.IntentFilter');
            NfcAdapter = plus.android.importClass('android.nfc.NfcAdapter');
            let _nfcAdapter = NfcAdapter.getDefaultAdapter(main2);
            let ndef = new IntentFilter2('android.nfc.action.NDEF_DISCOVERED');
            let tag = new IntentFilter2('android.nfc.action.TAG_DISCOVERED');
            let tech = new IntentFilter2('android.nfc.action.TECH_DISCOVERED');
            let intentFiltersArray = [ndef, tag, tech];
            let techListsArray = [
                ['android.nfc.tech.Ndef'],
                ['android.nfc.tech.IsoDep'],
                ['android.nfc.tech.NfcA'],
                ['android.nfc.tech.NfcB'],
                ['android.nfc.tech.NfcF'],
                ['android.nfc.tech.Nfcf'],
                ['android.nfc.tech.NfcV'],
                ['android.nfc.tech.NdefFormatable'],
                ['android.nfc.tech.MifareClassi'],
                ['android.nfc.tech.MifareUltralight']
            ];
            let _intent = new Intent(main2, main2.getClass());
            _intent.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);
            let pendingIntent = PendingIntent.getActivity(main2, 0, _intent, 0);
            if (_nfcAdapter == null) {} else if (_nfcAdapter.isEnabled() == false) {} else {
                _nfcAdapter.enableForegroundDispatch(main2, pendingIntent, IntentFilter2, techListsArray);
            }
        } catch (e) {}
    },
    // 读取NFC上的数据
    NFCReadUID() {
        let main3 = plus.android.runtimeMainActivity();
        let _intent = main3.getIntent();
        let _action = _intent.getAction();
        if (NfcAdapter.ACTION_NDEF_DISCOVERED == _action || NfcAdapter.ACTION_TAG_DISCOVERED == _action ||
            NfcAdapter.ACTION_TECH_DISCOVERED == _action) {
            let Tag = plus.android.importClass('android.nfc.Tag');
            let tagFromIntent = _intent.getParcelableExtra(NfcAdapter.EXTRA_TAG);
            let bind_code = _intent.getByteArrayExtra(NfcAdapter.EXTRA_ID);
            bind_code = this.byteArrayToHexString(bind_code);
            uni.$emit('nfcCode', {
                code: bind_code
            })
        }
    },
    // 将转大写格式
    byteArrayToHexString(inarray) {
        let i, j, inn;
        let hex = ["0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "A", "B", "C", "D", "E", "F"];
        let out = "";
        for (j = 0; j < inarray.length; ++j) {
            inn = inarray[j] & 0xff;
            i = (inn >>> 4) & 0x0f;
            out += hex[i];
            i = inn & 0x0f;
            out += hex[i];
        }
        return out;
    },

}

在你需要读取NFC的页面引入nfc.js，根据业务逻辑自己写，使用参考如下：

import nfcFun from "@/common/nfc.js";
export default {
    created(option) {
        nfcFun.NFCInit();
    },
    onHide() {
        nfcFun.NFCReadUID();
    },
    onLoad() {
        // 接收nfc的值
        uni.$on('nfcCode',(data)=>{
            console.log(data);
        })
    },
    onUnload() {
        uni.$off('nfcCode')//移除监听nfc
    }
}

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