Provides access to NDEF content and operations on a Android.Nfc.Tag.

Acquire a Android.Nfc.Tech.Ndef object using Ndef.Get(Android.Nfc.Tag).

NDEF is an NFC Forum data format. The data formats are implemented in Android.Nfc.NdefMessage and Android.Nfc.NdefRecord. This class provides methods to retrieve and modify the Android.Nfc.NdefMessage on a tag.

There are currently four NFC Forum standardized tag types that can be formatted to contain NDEF data.

• NFC Forum Type 1 Tag (Ndef.NfcForumType1), such as the Innovision Topaz
• NFC Forum Type 2 Tag (Ndef.NfcForumType2), such as the NXP MIFARE Ultralight
• NFC Forum Type 3 Tag (Ndef.NfcForumType3), such as Sony Felica
• NFC Forum Type 4 Tag (Ndef.NfcForumType4), such as NXP MIFARE Desfire

It is mandatory for all Android devices with NFC to correctly enumerate Android.Nfc.Tech.Ndef on NFC Forum Tag Types 1-4, and implement all NDEF operations as defined in this class.

Some vendors have there own well defined specifications for storing NDEF data on tags that do not fall into the above categories. Android devices with NFC should enumerate and implement Android.Nfc.Tech.Ndef under these vendor specifications where possible, but it is not mandatory. Ndef.Type returns a String describing this specification, for example Ndef.MifareClassic is com.nxp.ndef.mifareclassic.

Android devices that support MIFARE Classic must also correctly implement Android.Nfc.Tech.Ndef on MIFARE Classic tags formatted to NDEF.

For guaranteed compatibility across all Android devices with NFC, it is recommended to use NFC Forum Types 1-4 in new deployments of NFC tags with NDEF payload. Vendor NDEF formats will not work on all Android devices.

Note: Methods that perform I/O operations require the NoType:android/Manifest$permission;Href=../../../../reference/android/Manifest.permission.html#NFC permission.

[Android Documentation]

Namespace: Android.Nfc.Tech
Assembly: Mono.Android (in Mono.Android.dll)
Assembly Versions: 0.0.0.0
Since: Added in API level 10