uni-app 利用native调用Android NFC 读取RFID标签的UID

manifest.json 权限：
"<uses-permission android:name=\"android.permission.INTERNET\"/>",
"<uses-permission android:name=\"android.permission.NFC\"/>",
"<uses-permission android:name=\"android.permission.READ_EXTERNAL_STORAGE\"/>",
nfc.vue代码如下，完全可运行：

<template>  
    <view>  
        <view class="uni-padding-wrap">  
            NFC  
            <view class="uni-common-mt" style="background:#FFF; padding:20upx;">  
                <text>  
                    UID:{{UID}}  
                    {{tip}}  
                </text>  
            </view>  
        </view>  
    </view>  
</template>  

<script>  
    var NfcAdapter;  
    export default {  
        data() {  
            return {  
                title: 'redNFC',  
                UID: '',  
                msg: '',  
                tip: '',  
            }  
        },  
        onLoad() {  
            console.log("onLoad");  

        },  
        onShow() {  
            console.log("onShow");  
            this.NFCInit();  
        },  
        onHide() {  
            console.log("onHide");  
            this.NFCReadUID();  
        },  
        methods: {  
            NFCInit() {  
                try {  
                    var main = plus.android.runtimeMainActivity();  
                    //console.log(main);  
                    var Intent = plus.android.importClass('android.content.Intent');  
                    // console.log(Intent);  
                    var Activity = plus.android.importClass('android.app.Activity');  
                    //console.log(Activity);  
                    var PendingIntent = plus.android.importClass('android.app.PendingIntent');  
                    // console.log(PendingIntent);                    
                    var IntentFilter = plus.android.importClass('android.content.IntentFilter');  
                    // console.log(IntentFilter);  
                    // var Uri = plus.android.importClass('android.net.Uri');                     
                    // var Bundle = plus.android.importClass('android.os.Bundle');                    
                    // var Handler = plus.android.importClass('android.os.Handler');  
                    //console.log(Handler);  
                    NfcAdapter = plus.android.importClass('android.nfc.NfcAdapter');  
                    //console.log(NfcAdapter);  
                    var _nfcAdapter = NfcAdapter.getDefaultAdapter(main)  
                    // console.log(_nfcAdapter);  

                    var ndef = new IntentFilter("android.nfc.action.NDEF_DISCOVERED"); //NfcAdapter.ACTION_NDEF_DISCOVERED  
                    // console.log(ndef);  
                    var tag = new IntentFilter("android.nfc.action.TAG_DISCOVERED"); //NfcAdapter.ACTION_TECH_DISCOVERED  
                    // console.log(tag);  
                    var tech = new IntentFilter("android.nfc.action.TECH_DISCOVERED");  
                    // console.log(tech);  
                    var intentFiltersArray = [ndef, tag, tech];  

                    var 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"]  
                    ];  

                    var _intent = new Intent(main, main.getClass());  
                    // console.log(_intent);  
                    _intent.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);  

                    var pendingIntent = PendingIntent.getActivity(main, 0, _intent, 0);  
                    // console.log(pendingIntent);  

                    if (_nfcAdapter == null) {  
                        this.tip = '本设备不支持NFC!';  
                    } else if (_nfcAdapter.isEnabled() == false) {  
                        this.tip = 'NFC功能未打开!';  
                    } else {  
                        this.tip = 'NFC正常';  
                        _nfcAdapter.enableForegroundDispatch(main, pendingIntent, IntentFilter, techListsArray);  
                    }  
                } catch (e) {  
                    //TODO handle the exception  
                }  
            },  
            NFCReadUID() {  
                var main = plus.android.runtimeMainActivity();  
                var _intent = main.getIntent();  
                var _action = _intent.getAction();  
                // console.log("action type:" + _action);  

                if (NfcAdapter.ACTION_NDEF_DISCOVERED == _action || NfcAdapter.ACTION_TAG_DISCOVERED == _action || NfcAdapter.ACTION_TECH_DISCOVERED ==  
                    _action) {  
                    var Tag = plus.android.importClass('android.nfc.Tag');  
                    var tagFromIntent = _intent.getParcelableExtra(NfcAdapter.EXTRA_TAG);  
                    var uid = _intent.getByteArrayExtra(NfcAdapter.EXTRA_ID);  
                    console.log(uid);  
                    this.UID = this.Bytes2HexString(uid);  
                    //console.log(this.UID);  
                }  
            },  
            //将byte[] 转为Hex，  
            Bytes2HexString(arrBytes) {  
                var str = "";  
                for (var i = 0; i < arrBytes.length; i++) {  
                    var tmp;  
                    var num = arrBytes[i];  
                    if (num < 0) {  
                        //Java中数值是以补码的形式存在的，应用程序展示的十进制是补码对应真值。补码的存在主要为了简化计算机底层的运算，将减法运算直接当加法来做  
                        tmp = (255 + num + 1).toString(16);  
                    } else {  
                        tmp = num.toString(16);  
                    }  
                    if (tmp.length == 1) {  
                        tmp = "0" + tmp;  
                    }  
                    str += tmp;  
                }  
                return str;  
            }  
        }  
    }  
</script>  

<style>  

</style>