r-util-js/packages/uni-app/src/nfc/android.js

const systemInfo = uni.getSystemInfoSync();
const isAndroid =
  systemInfo.uniPlatform === "app" && systemInfo.osName === "android";

let runtimeMainActivity = null;
let newObject = null;
let getAttribute = null;
let setAttribute = null;
let importClass = null;
let invoke = null;
let Intent = null;
let Activity = null;
let PendingIntent = null;
let IntentFilter = null;
let NfcAdapter = null;
let NdefRecord = null;
let NdefMessage = null;
let MifareClassic = null;
let Ndef = null;
let Tag = null;
let Parcelable = null;
let NfcV = null;

if (isAndroid) {
  runtimeMainActivity = plus.android.runtimeMainActivity;
  newObject = plus.android.newObject;
  getAttribute = plus.android.getAttribute;
  setAttribute = plus.android.setAttribute;
  importClass = plus.android.importClass;
  invoke = plus.android.invoke;

  Intent = importClass("android.content.Intent");
  Activity = importClass("android.app.Activity");
  PendingIntent = importClass("android.app.PendingIntent");
  IntentFilter = importClass("android.content.IntentFilter");
  NfcAdapter = importClass("android.nfc.NfcAdapter");
  NdefRecord = importClass("android.nfc.NdefRecord");
  NdefMessage = importClass("android.nfc.NdefMessage");
  MifareClassic = importClass("android.nfc.tech.MifareClassic");
  Ndef = importClass("android.nfc.tech.Ndef");
  Tag = importClass("android.nfc.Tag");
  Parcelable = importClass("android.os.Parcelable");
  NfcV = importClass("android.nfc.tech.NfcV");
}

export class AndroidNfcUtil {
  main = null;
  nfcAdapter = null;
  pendingIntent = null;
  intentFiltersArray = null;
  techListsArray = null;
  discoveredListenerList = [];
  /**
   * @type {Function}
   */
  _discoveredHandler = null;
  /**
   * @type {Function}
   */
  _resumeHandler = null;

  constructor() {
    this.main = runtimeMainActivity();
    this.nfcAdapter = NfcAdapter.getDefaultAdapter(this.main);
    this._discoveredHandler = this.discoveredHandler.bind(this);
    this._resumeHandler = this.resumeHandler.bind(this);
  }

  /**
   *
   * @param {Function} cb
   */
  addDiscoveredListener(cb) {
    this.discoveredListenerList.push(cb);
  }

  /**
   * 是否支持NFC
   * @returns
   */
  static isNfcSupported() {
    const main = runtimeMainActivity();
    const nfcAdapter = NfcAdapter.getDefaultAdapter(main);
    return nfcAdapter != null;
  }

  /**
   * 是否开启NFC
   * @returns {boolean} true 已开启
   */
  static async isNfcEnabled() {
    const main = runtimeMainActivity();
    const nfcAdapter = NfcAdapter.getDefaultAdapter(main);
    return nfcAdapter && nfcAdapter.isEnabled();
  }

  /**
   *
   * @returns {Promise<number[]>}
   */
  async startNfcScan() {
    console.log("startNfcScan", this.nfcAdapter);

    if (this.nfcAdapter == null) {
      throw new Error("该设备不支持NFC");
    } else if (!this.nfcAdapter.isEnabled()) {
      throw new Error("未开启NFC");
    } else {
      return await this.init();
    }
  }

  async stopNfcScan() {
    console.log("stopNfcScan");
    plus.globalEvent.removeEventListener("newintent", this._discoveredHandler);
    plus.globalEvent.removeEventListener("resume", this._discoveredHandler);
    this.nfcAdapter.disableForegroundDispatch(this.main);
  }

  /**
   * 初始化ncf 并开启监听
   */
  async init() {
    console.log("init");
    const ndef = new IntentFilter(NfcAdapter.ACTION_NDEF_DISCOVERED);
    const tag = new IntentFilter(NfcAdapter.ACTION_TAG_DISCOVERED);
    const tech = new IntentFilter(NfcAdapter.ACTION_TECH_DISCOVERED);
    this.intentFiltersArray = [ndef, tag, tech];

    this.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.Nfef"],
      ["android.nfc.tech.Ndef"],
      ["android.nfc.tech.NfcV"],
      ["android.nfc.tech.NdefFormatable"],
      ["android.nfc.tech.MifareClassi"],
      ["android.nfc.tech.MifareUltralight"],
    ];
    const intent = new Intent(this.main, this.main.getClass());
    intent.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);

    this.pendingIntent = PendingIntent.getActivity(this.main, 0, intent, 0);

    this.nfcAdapter.enableForegroundDispatch(
      this.main,
      this.pendingIntent,
      this.intentFiltersArray,
      this.techListsArray,
    );

    plus.globalEvent.addEventListener("newintent", this._discoveredHandler);
    plus.globalEvent.addEventListener("resume", this._resumeHandler);
  }

  resumeHandler() {
    console.log("resumeHandler");
    this.nfcAdapter.enableForegroundDispatch(
      this.main,
      this.pendingIntent,
      this.intentFiltersArray,
      this.techListsArray,
    );
  }

  discoveredHandler() {
    console.log("discoveredHandler");
    this.discoveredListenerList.forEach((cb) => {
      cb(this.readId());
    });
  }

  readId() {
    console.log("readId");

    const intent = this.main.getIntent();
    const action = intent.getAction();
    console.log("action: " + action);

    // if (
    //   NfcAdapter.ACTION_NDEF_DISCOVERED == action ||
    //   NfcAdapter.ACTION_TAG_DISCOVERED == action ||
    //   NfcAdapter.ACTION_TECH_DISCOVERED == action
    // ) {
    console.log("intent.getAction()", intent.getAction());
    const tagFromIntent = intent.getParcelableExtra(NfcAdapter.EXTRA_TAG);
    console.log("tagFromIntent.getId", tagFromIntent.getId());
    return tagFromIntent.getId();
    // }
  }

  static async scan() {
    const androidNfcUtil = new AndroidNfcUtil();
    return await new Promise(async (resolve, reject) => {
      await androidNfcUtil.startNfcScan();
      androidNfcUtil.addDiscoveredListener((res) => {
        androidNfcUtil.stopNfcScan();
        resolve(res);
      });
    });
  }
}