Error write Android

[zigou13]

IONIC 5 Hello, when writing NFC, I got this error

Attempt to invoke virtual method 'android.os.Parcelable android.content.Intent.getParcelableExtra (java.lang.String)' on a null object reference

For reading the NFC, it works perfectly, here is the code below

readNFC() {
    console.log('read');
    this.nfc.addNdefListener((addndef) => {
      console.log('17 : ', addndef);
      //this.presentAlert('ok');
    }, (err) => {
      console.log('20 : ', err);
      this.presentAlert('ko' + err);
    }).subscribe((event) => {
      console.log('Tag : ', event);
      //console.log(JSON.stringify(event));
    });
  }

  writeNFC() {
    console.log('write');
    const message = this.ndef.textRecord('Hello world');
    this.nfc.write([message]).then(data => {
      console.log(data);
      console.log('Write successfully');
    }
    ).catch(err => {
      console.log(err);
      console.log('Write KO !');
    });
  }

[zigou13]

@don please

[don]

The call to nfc.write needs to happen inside the NDEF listener callback.

[zigou13]

ok thank you

[don]

Here's an old example that should still work. I add a tag discovered listener, passing my writeTag function as the callback https://github.com/don/phonegap-nfc-writer/blob/9f32ad17115457f75319b41c890ba1669a2b18a5/www/main.js#L32

Then in writeTag, I ignore any data in the nfcEvent and write my new data to the tag. https://github.com/don/phonegap-nfc-writer/blob/9f32ad17115457f75319b41c890ba1669a2b18a5/www/main.js#L3-L20