uni-app封装一个简单NFC工具类

• util

/*
 * desc：封装NFC功能，实现安卓设备对NFC标签读取卡号，支持android5.0及以上版本，仅支持 android 平台 
 * author：liangyisheng
 * date：2020/07/30 19:21:03
 * version：1.0.0
 */ // 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 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'] ]; let readyRead = false; export default { nfcGetId: function(obj) { 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' }) return; } if (!nfcAdapter.isEnabled()) { uni.showToast({ title: '请在系统设置中先启用NFC功能！', icon: 'none' }); return; } 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(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 (readyRead) { uni.showToast({ title: '请勿移开标签正在读取数据', icon: 'none' }); let that = this; // NFC id let bytesId = intent.getByteArrayExtra(NfcAdapter.EXTRA_ID); let nfc_id = that.byteArrayToHexString(bytesId); console.log('nfc_id:', nfc_id); obj.success(nfc_id); readyRead = false; } } }, 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); // 监听事件，触发条件
			readyRead = true; uni.showToast({ title: '请将NFC标签靠近！', icon: 'none' }); } catch (e) { console.error(e); obj.fail(e); } finally{ obj.complete(); } }, byteArrayToHexString: function(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; }, } 

• 调用

 nfc.nfcGetId({ success: function(data) { console.log('11111') }, fail: function(data) { console.log('22222') }, complete: function(data) { console.log('33333') } }); 

本文地址：https://blog.csdn.net/weixin_42779634/article/details/107716681