Question

如何通过NFC P2P发送原始字节。我在发送方那边有这个：

private static NdefRecord createByteRecord(final byte[] b){
    final byte[] data = new byte[b.length + 1];
    data[0] = (byte) 0x0;
    System.arraycopy(b, 0, data, 1, b.length);    
    return new NdefRecord(NdefRecord.TNF_WELL_KNOWN, NdefRecord.RTD_TEXT, new byte[0], data);
}

我不知道，如果“NdefRecord.RTD_TEXT”在这里是一个不错的选择。在接收方，它看起来像这样：

private String readText(NdefRecord record) throws UnsupportedEncodingException
{
    byte[] payload = record.getPayload();
    //DO SOMETHING WITH BYTES, BUT GOT WRONG RESULTS WITH THIS BYTES    
    String textEncoding = ((payload[0] & 128) == 0) ? "UTF-8" : "UTF-16";
    int languageCodeLength = payload[0] & 0063;
    return new String(payload, languageCodeLength + 1, payload.length - languageCodeLength - 1, textEncoding);
}

应该使用什么记录类型来传输原始数据字节？如何将它们打包成NDEF记录？

Answer 1

要传输字节数组，最好使用TNF_MIME_MEDIA。您可以创建自己的mime类型，例如：

"application/vnd.com.mycompany.myapp.beam"

例如创建NDEFRecord：

byte[] bytes = ...;
NdefRecord mimeRecord = NdefRecord.createMime("application/vnd.com.mycompany.myapp.beam", bytes);

android下面的doc：

https://developer.android.com/guide/topics/connectivity/nfc/nfc.html#mime

如何通过NFC发送字节[]

1 个答案: