How do I write NDEF records to NFC tags using the enableReaderMode API?

Writing NDEF Records to NFC Tags

Writing an NDEF (NFC Data Exchange Format) message to an NFC tag is a convenient way to transfer data between devices. However, there are certain nuances to consider to ensure successful writes.

NDEF Message Generation

To generate an NDEF message, you can use the createTextRecord() method provided in your code sample. This method allows you to create a text record containing the desired payload.

Discovering the NFC Tag

Unlike the older Intent-based approach, using the enableReaderMode API is recommended for reliable tag discovery. This API enables direct communication with the NFC tag without interruptions from the system, reducing potential errors.

Writing to the Tag

Once the NFC tag is discovered, you can write the NDEF message using the connect() and writeNdefMessage() methods. However, it's essential to handle potential exceptions during the write operation to avoid data corruption or failed writes.

Additional Considerations

• Disable platform sounds to prevent interruptions during card reading and writing.
• Implement additional logic to avoid writing duplicate messages to the same card.
• Remember that the code provided does not handle low-level reading and writing for specific Tag Technology types, such as Ndef. Adapt the code accordingly to work with specific tag types.

Code Example

The provided code snippet demonstrates how to use the enableReaderMode API to read and write an NDEF message to an NFC tag. It encapsulates the necessary actions in the onTagDiscovered() method, ensuring that card operations, error handling, and notification are handled properly.

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