当 NDEF 长度超过 256 字节时,无法从 CoreNFC 获得任何响应,因此需要使用 3 字节字段而不是 1 字节字段。我应该注意,标签都可以在 Android 上读取。
其他人可以确认此行为或帮助我了解如何指定文件以便 CoreNFC 识别并读取文件吗?
所以这行得通,
// TLV header
// Start of Type (T) field
0x03, // This message contains an NDEF record
// End of Type (T) field
// Start of Length (L) field
// Length = payload length + length of value field
0xFE, // Length field, adds 3 to account for length of value field when SR:1
// End of Length (L) field
// Start of Value (V) field
// Record head byte, MB:1,ME:1,CF:0,SR:1,IL:0,TNF:101
0xD5, // Short record false SR:1, 1-byte payload length, unknown type
0x00, // Type set to zero, as specified for unknown type
0xFB, // Payload length
// End of Value (V) field
// End of TLV header
但这不,
// TLV header
// Start of Type (T) field
0x03, // This message contains an NDEF record
// End of Type (T) field
// Start of Length (L) field
// Length = payload length + length of value field
0xFF, // Always 0xFF for SR:0, indicates length is between 256 and 65535
0x01, // MSB of length field
0xF2, // LSB of length field, adds 6 to account for length of value field when SR:0
// End of Length (L) field
// Start of Value (V) field
// Record head byte, MB:1,ME:1,CF:0,SR:0,IL:0,TNF:101
0xC5, // Short record false SR:0, 4-byte payload length, unknown type
0x00, // Type set to zero, as specified for unknown type
0x00, // MSB of payload length, should be the exact size of the payload (data)
0x00,
0x01,
0xEC, // LSB of payload length
// End of Value (V) field
// End of TLV header