Android byte[] 轉 string

直接上代碼，可直接用：

private final static byte[] hex = "0123456789ABCDEF".getBytes();

public static String Bytes2HexString(byte[] b) {
byte[] buff = new byte[2 * b.length];
for (int i = 0; i < b.length; i++) {
buff[2 * i] = hex[(b[i] >> 4) & 0x0f];
buff[2 * i + 1] = hex[b[i] & 0x0f];
}
return new String(buff);
}

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