在Android中從NFC讀取ID

Question

如何從Android中的NFC標籤讀取ID？

Answer 1

您可以按照以下主題：How to read from detected NFC tag (NDEF message). Android NFC。
通過首先搜索NFC基本教程可能會有所幫助。

Answer 2

這是你想要什麼：

byte[] tagId = intent.getByteArrayExtra(NfcAdapter.EXTRA_ID); 
NdefMessage[] msgs = (NdefMessage[]) intent.getParcelableArrayExtra(NfcAdapter.EXTRA_NDEF_MESSAGES); 

然後你必須分析從字節爲String。

String ByteArrayToHexString(byte [] inarray) 
    { 
    int i, j, in; 
    String [] hex = {"0","1","2","3","4","5","6","7","8","9","A","B","C","D","E","F"}; 
    String out= ""; 

    for(j = 0 ; j < inarray.length ; ++j) 
     { 
     in = (int) inarray[j] & 0xff; 
     i = (in >> 4) & 0x0f; 
     out += hex[i]; 
     i = in & 0x0f; 
     out += hex[i]; 
     } 
    return out; 
}