cordova-plugin-nfc-android

A plugin to handle read/write NDEF messages from NFC on Android.

Installation:

For stable relases type:

cordova plugin add cordova-plugin-nfc-android

For latest releases type:

cordova plugin add https://github.com/bkamenov/cordova-plugin-nfc-android

API & Usage:

// NFC status checking.
cordova.plugins.NFC.status(
  (status) => {
    console.log('NFC status:', status); //"NFC_OK", "NFC_DISABLED" or "NO_NFC" (device does not have NFC hardware)

    if(status === "NFC_DISABLED") {
      // Open NFC settings
      cordova.plugins.NFC.showSettings();
    }
  });

// Permissions asking (normally permission is automatically granted but just in case check)
cordova.plugins.NFC.askForPermission(
  (granted) => {
    console.log('NFC permission granted:', granted); //1 - granted, 0 - not granted
  });

// Set MIME type filter - set a list of MIME types for the NDEF messages you want to read.
// If not set, all NDEF messages will be read.
cordova.plugins.NFC.setMimeTypeFilter(["text/plain"],
  () => {
    console.log('MIME type filter set');
  },
  (error: string) => {
    console.error('Failed to set MIME type filter:', error);
  });

// Helper function
function arrayBufferToString(buffer) {
  const decoder = new TextDecoder('utf-8');
  const view = new Uint8Array(buffer);
  return decoder.decode(view);
}

// Listen for NDEF tags
document.addEventListener('ndef',
  (event) => {
    const ndef = event.detail;
    console.log("NDEF tag detected: " + ndef.tagSerial);
    if (ndef.mimeType) // MIME type is optional field and may not be set on all NDEF tags
      console.log("NDEF tag MIME: " + ndef.mimeType);
    console.log("NDEF data as text: " + arrayBufferToString(ndef.ndefData));

    // Write NDEF message when a tag is detected (This step is optional,
    // because you are not obligated to write to tags.)
    const message = {
      mimeType: "text/plain", // mimeType is optional
      ndefData: new TextEncoder().encode("My message").buffer
    };
    // The write command should be run in the context of read. 
    // Otherwise, the behavior is unknown.
    cordova.plugins.NFC.write(message,
      () => {
        console.log('NDEF message written successfully');
      },
      (error) => {
        console.log('Failed to write NDEF message:', error);
      });
  });

// Monitor for NFC state changes
document.addEventListener('nfcstatechange',
  (event) => {
    console.log("NFC state changed to: " + event.detail); // "NFC_OK" or "NFC_DISABLED"
  });

It is recomended to use cordova-plugin-nfc-launcher-android if you want your app to launch automatically when a NDEF message with specific MIME type is detected.

If you like my work and want more nice plugins, you can get me a beer or stake.