关于uniapp NFC的读写记录

第一步:manifest.json中配置

//开启NFC权限
"<uses-permission android:name=\"android.permission.INTERNET\"/>",
"<uses-permission android:name=\"android.permission.NFC\"/>"

第二步:新建nfc.js文件，复制下面代码（ext.dcloud.net.cn/plugin?id=9…

//这个可以读取写入的数据
// 包路径
const package_NdefRecord = 'android.nfc.NdefRecord';
const package_NdefMessage = 'android.nfc.NdefMessage';
const package_TECH_DISCOVERED = 'android.nfc.action.TECH_DISCOVERED';
const package_Intent = 'android.content.Intent'; 
const package_Activity = 'android.app.Activity'; 
const package_PendingIntent = 'android.app.PendingIntent'; 
const package_IntentFilter = 'android.content.IntentFilter'; 
const package_NfcAdapter = 'android.nfc.NfcAdapter'; 
const package_Ndef = 'android.nfc.tech.Ndef'; 
const package_NdefFormatable = 'android.nfc.tech.NdefFormatable'; 
const package_Parcelable = 'android.os.Parcelable'; 
const package_String = 'java.lang.String'; 

let NfcAdapter;
let NdefRecord;
let NdefMessage;
let readyWriteData = false;
let readyRead = false;
let noNFC = false;
let techListsArray = [
	['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']
];
// 要写入的数据
let text = '{id:123,name:nfc,stie:cssmini.com}';
let readResult = '';

export default {
	listenNFCStatus: function () {
		let that = this;
		try {
			let main = 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 IntentFilter = plus.android.importClass('android.content.IntentFilter');
			NfcAdapter = plus.android.importClass('android.nfc.NfcAdapter');
			let nfcAdapter = NfcAdapter.getDefaultAdapter(main);
			
			if(nfcAdapter == null){
				uni.showToast({
				  title: '设备不支持NFC！',
				  icon: 'none'
				})
				noNFC = true;
				return;
			}
			
			if (!nfcAdapter.isEnabled()) {
				uni.showToast({
				  title: '请在系统设置中先启用NFC功能！',
				  icon: 'none'
				});
				noNFC = true;
				return;
			}else{
				noNFC = false;
			}
			
			let intent = new Intent(main, main.getClass());
			intent.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);
			let pendingIntent = PendingIntent.getActivity(main, 0, intent, 0);
			let ndef = new IntentFilter("android.nfc.action.TECH_DISCOVERED");
			ndef.addDataType("*/*");
			let intentFiltersArray = [ndef];
			
			plus.globalEvent.addEventListener('newintent',function() {
				console.log('newintent running');
				// 监听 NFC
				setTimeout(that.nfcRuning(), 1000);
			});
			plus.globalEvent.addEventListener('pause',function(e) {
				console.log('pause running');
				if (nfcAdapter) {
					//关闭前台调度系统
					//恢复默认状态
					nfcAdapter.disableForegroundDispatch(main);
				}
			});
			plus.globalEvent.addEventListener('resume',function(e) {
				console.log('resume running');
				if (nfcAdapter) {
					 //开启前台调度系统
					nfcAdapter.enableForegroundDispatch(main, pendingIntent, intentFiltersArray, techListsArray);
				}
			});
			nfcAdapter.enableForegroundDispatch(main, pendingIntent, intentFiltersArray, techListsArray); 
		} catch (e) {
			console.error(e);
		}
	},
	nfcRuning: function () {
		NdefRecord = plus.android.importClass("android.nfc.NdefRecord");
		NdefMessage = plus.android.importClass("android.nfc.NdefMessage");
		let main = plus.android.runtimeMainActivity();
		let intent = main.getIntent();
		let that = this;
		
		console.log("action type:" + intent.getAction());
		
		if (package_TECH_DISCOVERED == intent.getAction()) {
			if (readyWriteData) {
				that.write(intent);
				readyWriteData = false;
			} else if (readyRead) {
				that.read(intent);
				readyRead = false;
			}
		}
	},
	write(intent) {
		try {
			toast('请勿移开标签 正在写入...');
			console.log("text=" + text);
			
			let textBytes = plus.android.invoke(text, "getBytes");
			// image/jpeg text/plain  
			let textRecord = new NdefRecord(NdefRecord.TNF_MIME_MEDIA,
											plus.android.invoke("text/plain", "getBytes"),  
											plus.android.invoke("", "getBytes"), textBytes);
			let message = new NdefMessage([textRecord]);
			let Ndef = plus.android.importClass('android.nfc.tech.Ndef');
			let NdefFormatable = plus.android.importClass('android.nfc.tech.NdefFormatable');
			let tag = intent.getParcelableExtra(NfcAdapter.EXTRA_TAG);
			let ndef = Ndef.get(tag);
			if (ndef != null) {
				// 待写入的数据长度
				let size = message.toByteArray().length;
				ndef.connect();
				if (!ndef.isWritable()) {
					toast('tag不允许写入！');
					return;
				}
				if (ndef.getMaxSize() < size) {
					toast('文件大小超出容量！');
					return;
				}
				ndef.writeNdefMessage(message);
				toast('写入数据成功！');
				return;
			} else {
				let format = NdefFormatable.get(tag);
				if (format != null) {
					try {
						format.connect();
						format.format(message);
						toast('格式化tag并且写入message');
						return;
					} catch (e) {
						toast('格式化tag失败.');
						return;
					}
				} else {
					toast('Tag不支持NDEF');
					return;
				}
			}
		} catch (e) {
			toast('写入失败');
			console.log("error=" + e);
		}
	
	},
	read(intent) {
		toast('请勿移开标签正在读取数据');
		let that = this;
		// NFC id
		let bytesId = intent.getByteArrayExtra(NfcAdapter.EXTRA_ID);
		let nfc_id = that.byteArrayToHexString(bytesId);
		console.log('nfc_id:', nfc_id);
		let Parcelable = plus.android.importClass("android.os.Parcelable");
		let rawmsgs = intent.getParcelableArrayExtra("android.nfc.extra.NDEF_MESSAGES");
		//let rawmsgs = intent.getParcelableArrayExtra();
		
		if(rawmsgs != null && rawmsgs.length > 0) {
			let records = rawmsgs[0].getRecords();
			let result = records[0].getPayload();
			let data = plus.android.newObject("java.lang.String", result);
			toast('NFC 数据：' + data);
			console.log('NFC 数据：',data);
			readResult = data;
		}else{
			toast('没有读取到数据');
		}
	},
	byteArrayToHexString: function (inarray) { // converts byte arrays to string  
		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;  
	},
	writeData: function () {
		if(noNFC){
			toast('请检查设备是否支持并开启 NFC 功能！');
			return;
		}
		// 监听事件，触发条件
		readyWriteData = true;
		toast('请将NFC标签靠近！');
	},
	readData: function () {
		if(noNFC){
			toast('请检查设备是否支持并开启 NFC 功能！');
			return;
		}
		// 监听事件，触发条件
		readyRead = true;
		toast('请将NFC标签靠近！');
	}
}
function toast(content){
	uni.showToast({
		title: content,
		icon: 'none'
	})
}

第三步:使用

import nfc from '../../js_sdk/hexiii-nfc/hexiii-nfc.js'//引入
<button @click="writeData()">writeData</button>
<button @click="readData()">readData</button>
//这个例子是按钮点击进行读写,如果想app初始化的时候只进行读取的话继续看下面的例子
onLoad() {
	// 初始化NFC
	nfc.listenNFCStatus();
       
},
methods: {
//写入
  writeData() {
	  uni.showModal({
		title: "温馨提示",
		content: "此操作将抹除芯片中的数据，且不可逆",
		success: function(res) {
			if (res.confirm) {
				nfc.writeData();
				}
			}
		})
	},
 //读取
 readData() {
	  const id =nfc.readData();
	  
	},
}

//app初始化只监听读取数据
//1.在上面的nfc源码里面注释掉nfcRuning方法内的写入代码即可,如下
//if (readyWriteData) { that.write(intent);
//readyWriteData = false; 
//} else if (readyRead) {
that.read(intent); 
//readyRead = false;
//} 
//在APP.vue文件内初始化并监听
onLaunch: function() {
// #ifdef APP-PLUS
 nfc.listenNFCStatus();//初始化
 uni.$on('nfcCode', (data) => {
 //data为IC卡识别出的数据,nfcCode在上面nfc源码里有触发,所以可以全局监听
 })
},

读取卡ID

//只读取
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');
			console.log('Tag====',Tag)
			let tagFromIntent = _intent.getParcelableExtra(NfcAdapter.EXTRA_TAG);
			let bind_code = _intent.getByteArrayExtra(NfcAdapter.EXTRA_ID);
			console.log('lslslslslslls',tagFromIntent)
			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;
	},
	
}

使用

 import nfcFun from './nfc';
 nfcFun.NFCInit();//初始化nfc
 //nfc读取监听
 uni.$on('nfcCode', (data) => {
     console.log('测试测试', data);
  })
 //移除监听
 uni.$off('nfcCode')
  

nfc打开应用

//还没有实现...待续