How to Write NDEF Records to NFC Tag

Writing NDEF records to an NFC tag requires utilizing the enableReaderMode API, which offers superior performance and reliability compared to the Intent-based system. By handling the reading and writing process rather than relying on the system's default behavior, the risk of failed writes and corrupted cards is significantly reduced.

Key Benefits of Using enableReaderMode API:

• Control over notification sound timing
• Elimination of pauses in your app during card reading
• Reliable writing to NFC tags, reducing user frustration and corrupted cards

Implementation Example:

The following code sample demonstrates the writing of NDEF records using the enableReaderMode API:

public class NFCActivity extends AppCompatActivity implements NfcAdapter.ReaderCallback {

    @Override
    public void onTagDiscovered(Tag tag) {
        Ndef mNdef = Ndef.get(tag);
        if (mNdef != null) {
            // Create and add the NDEF record to a NDEF message
            try {
                mNdef.connect();
                NdefMessage mMsg = new NdefMessage(NdefRecord.createTextRecord("en", "English String"));
                mNdef.writeNdefMessage(mMsg);

                // Success handling code (e.g., notification sound or UI feedback)

            } catch (Exception e) {
                // Error handling (e.g., toast message or log error)
            } finally {
                // Release resources and close the connection to the tag
                mNdef.close();
            }
        }
    }
}

By utilizing these techniques, developers can enhance the reliability and efficiency of NFC writing operations, ensuring seamless user experiences.