Explain the bytes associated with the NFC type 4 tag.
Change-Id: Ibe12a8cb94032f52e02ef28a423203483b1e096f
diff --git a/apps/Tag/src/com/android/apps/tag/TagDBHelper.java b/apps/Tag/src/com/android/apps/tag/TagDBHelper.java
index 5739da9..6209507 100644
--- a/apps/Tag/src/com/android/apps/tag/TagDBHelper.java
+++ b/apps/Tag/src/com/android/apps/tag/TagDBHelper.java
@@ -46,55 +46,72 @@
private static final String INSERT =
"INSERT INTO NdefMessage (bytes, date, saved) values (?, ?, ?)";
+ /**
+ * A real NFC tag containing an NFC "smart poster". This smart poster
+ * consists of the text "NFC Forum Type 4 Tag" in english combined with
+ * the URL "http://www.nxp.com/nfc"
+ */
private static final byte[] REAL_NFC_MSG = new byte[] {
- (byte) 0xd1,
- (byte) 0x02,
- (byte) 0x2b,
- (byte) 0x53,
- (byte) 0x70,
- (byte) 0x91,
- (byte) 0x01,
- (byte) 0x17,
- (byte) 0x54,
- (byte) 0x02,
- (byte) 0x65,
- (byte) 0x6e,
- (byte) 0x4e,
- (byte) 0x46,
- (byte) 0x43,
- (byte) 0x20,
- (byte) 0x46,
- (byte) 0x6f,
- (byte) 0x72,
- (byte) 0x75,
- (byte) 0x6d,
- (byte) 0x20,
- (byte) 0x54,
- (byte) 0x79,
- (byte) 0x70,
- (byte) 0x65,
- (byte) 0x20,
- (byte) 0x34,
- (byte) 0x20,
- (byte) 0x54,
- (byte) 0x61,
- (byte) 0x67,
- (byte) 0x51,
- (byte) 0x01,
- (byte) 0x0c,
- (byte) 0x55,
- (byte) 0x01,
- (byte) 0x6e,
- (byte) 0x78,
- (byte) 0x70,
- (byte) 0x2e,
- (byte) 0x63,
- (byte) 0x6f,
- (byte) 0x6d,
- (byte) 0x2f,
- (byte) 0x6e,
- (byte) 0x66,
- (byte) 0x63
+ (byte) 0xd1, // MB=1 ME=1 CF=0 SR=1 IL=0 TNF=001
+ (byte) 0x02, // Type Length = 2
+ (byte) 0x2b, // Payload Length = 43
+ (byte) 0x53, (byte) 0x70, // Type = {'S', 'p'} (smart poster)
+
+ // begin smart poster payload
+ // begin smart poster record #1
+ (byte) 0x91, // MB=1 ME=0 CF=0 SR=1 IL=0 TNF=001
+ (byte) 0x01, // Type Length = 1
+ (byte) 0x17, // Payload Length = 23
+ (byte) 0x54, // Type = {'T'} (Text data)
+ (byte) 0x02, // UTF-8 encoding, language code length = 2
+ (byte) 0x65, (byte) 0x6e, // language = {'e', 'n'} (english)
+
+ // Begin text data within smart poster record #1
+ (byte) 0x4e, // 'N'
+ (byte) 0x46, // 'F'
+ (byte) 0x43, // 'C'
+ (byte) 0x20, // ' '
+ (byte) 0x46, // 'F'
+ (byte) 0x6f, // 'o'
+ (byte) 0x72, // 'r'
+ (byte) 0x75, // 'u'
+ (byte) 0x6d, // 'm'
+ (byte) 0x20, // ' '
+ (byte) 0x54, // 'T'
+ (byte) 0x79, // 'y'
+ (byte) 0x70, // 'p'
+ (byte) 0x65, // 'e'
+ (byte) 0x20, // ' '
+ (byte) 0x34, // '4'
+ (byte) 0x20, // ' '
+ (byte) 0x54, // 'T'
+ (byte) 0x61, // 'a'
+ (byte) 0x67, // 'g'
+ // end Text data within smart poster record #1
+ // end smart poster record #1
+
+ // begin smart poster record #2
+ (byte) 0x51, // MB=0 ME=1 CF=0 SR=1 IL=0 TNF=001
+ (byte) 0x01, // Type Length = 1
+ (byte) 0x0c, // Payload Length = 12
+ (byte) 0x55, // Type = { 'U' } (URI)
+
+ // begin URI data within smart poster record #2
+ (byte) 0x01, // URI Prefix = 1 ("http://www.")
+ (byte) 0x6e, // 'n'
+ (byte) 0x78, // 'x'
+ (byte) 0x70, // 'p'
+ (byte) 0x2e, // '.'
+ (byte) 0x63, // 'c'
+ (byte) 0x6f, // 'o'
+ (byte) 0x6d, // 'm'
+ (byte) 0x2f, // '/'
+ (byte) 0x6e, // 'n'
+ (byte) 0x66, // 'f'
+ (byte) 0x63 // 'c'
+ // end URI data within smart poster record #2
+ // end smart poster record #2
+ // end smart poster payload
};
public TagDBHelper(Context context) {