Open app with NFC tag and pass routing information

[NePheus]

Hello,

my goal is to open my app with a specific route when I hold it over a NFC tag. So far I tried it with deep linking. Deep linking itself is working as expected. When I click the deep link, my app gets opened automatically and is routing correctly to the destination page. When I write this URL with the Android App "NFC Tools" on my NFC tag and hold my phone on it, it just opens Chrome but not the app.
I read on this page, that deep linking is blocked with NFC tags:
https://joturl.zendesk.com/hc/en-us/articles/360014154460-How-to-deep-link-into-your-Android-app-from-an-NFC-tag
"Let's start by saying that Android blocks normal deep link techniques if the URL comes from an NFC tag. It is a security protocol and there is not much you can do to counter it."
Is this right?

Is there another way to achieve this, i.e. using intents? If yes, is there any tutorial about this?

[NePheus]

If I change this:

<intent-filter android:autoVerify="true">
    <action android:name="android.intent.action.VIEW" />
    <category android:name="android.intent.category.DEFAULT" />
    <category android:name="android.intent.category.BROWSABLE" />
    <data android:host="@string/deep_link_url" android:scheme="https" />
</intent-filter>

to this:

<intent-filter android:autoVerify="true">
    <action android:name="android.nfc.action.NDEF_DISCOVERED"/>
    <category android:name="android.intent.category.DEFAULT" />
    <data android:host="@string/deep_link_url" android:scheme="https" />
</intent-filter>

The app starts with the nfc tag, but no listener is triggering, like "App.addListener('appUrlOpen'..." or "App.addListener('appRestoredResult'...", so I cant route to my destination.

[jcesarmobile]

App plugin responds to VIEW action, you'll need a plugin to respond to NDEF_DISCOVERED action

[NePheus]

Ok I understand. I gave this a try:
https://ionicframework.com/docs/native/nfc
But I get a NullPointerException caused by com.chariotsolutions.nfc.plugin.NfcPlugin.sendEvent when the app starts after holding the phone on the NFC tag. Maybe because I am using Capacitor 3. So I found another fork here:
https://github.com/iotize-sas/device-com-nfc.cordova
This is running without this error.
So I have the following setup now:
AndroidManifest.xml

<intent-filter android:autoVerify="true">
    <action android:name="android.nfc.action.NDEF_DISCOVERED"/>
    <category android:name="android.intent.category.DEFAULT" />
    <data android:mimeType="application/MYBUNDLEID" />
</intent-filter>

app component constructor:

this._nfc
  .addNdefListener(
    function () {
      console.log("addNdefListener success");
    },
    function (reason) {
      alert("addNdefListener failed " + reason);
    }
  )
  .subscribe((nfcEvent) => {
    var tag = nfcEvent.tag,
      ndefMessage = tag.ndefMessage;
    alert(this._nfc.bytesToString(ndefMessage[0].payload).substring(1));
  });

this._nfc
  .addMimeTypeListener(
    "application/MYBUNDLEID",
    function () {
      console.log("addNdefListener success");
    },
    function (reason) {
      alert("addNdefListener failed " + reason);
    }
  )
  .subscribe((nfcEvent) => {
    var tag = nfcEvent.tag,
      ndefMessage = tag.ndefMessage;
    alert(this._nfc.bytesToString(ndefMessage[0].payload).substring(1));
  });

Like described here:
https://github.com/don/nfc-launch/blob/master/www/js/index.js

Result:
I get my alert when the app is started and I hold my phone on the NFC tag. When I close the app and hold it on the NFC tag, the app starts, but I do not get the dialog.
I think this thread is about that issue chariotsolutions/phonegap-nfc#187 but I dont know how to handle it with capacitor 3.

[NePheus]

I created a capacitor 3 plugin for app launching with nfc:
https://www.npmjs.com/package/capacitor-nfc-launch