本文转自薄呵呵的文章
初始化适配器 NfcAdapter PendingIntent
Intent nfcIntent = new Intent(this, getClass());
nfcIntent.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP);
mAdapter = NfcAdapter.getDefaultAdapter(this);
mPendingIntent = PendingIntent.getActivity(this, 0, nfcIntent, 0);
String infoText = "看下这个支持nfc吗 或者 开了没";
if (mAdapter == null) {
Toast.makeText(getApplicationContext(),
infoText, Toast.LENGTH_SHORT).show();
}
重写onNewIntent()方法
@Override
protected void onNewIntent(Intent intent) {
Tag tag=intent.getParcelableExtra(NfcAdapter.EXTRA_TAG);
//获取 Tag 读取 ID 得到字节数组 转字符串 转码 得到卡号（默认16进制 这请自便）
Long cardNo = Long.parseLong(flipHexStr(ByteArrayToHexString(tag.getId())), 16);
// if (cardNo.toString().getBytes().length == 10) {
num = cardNo.toString();
// } else {
// 转的时候有个地方需要注意下 如果开头为零的话 会省略所以位数会改变
// num = "0" + cardNo.toString();
// }
TextView textView = (TextView) findViewById(R.id.nfc_text);
textView.setText(num);
Toast.makeText(getApplicationContext(), num, Toast.LENGTH_SHORT).show();
}
息屏之类的操作
@Override
public void onPause() {
super.onPause();
if (mAdapter != null) {
mAdapter.disableForegroundDispatch(this);
}
}
@Override
public void onResume() {
super.onResume();
mAdapter.enableForegroundDispatch(this, mPendingIntent, null, null);
}
最后附上转码工具类
public class ByteArrayTohexHepler {
public static String flipHexStr(String s) {
StringBuilder result = new StringBuilder();
for (int i = 0; i <= s.length() - 2; i = i + 2) {
result.append(new StringBuilder(s.substring(i, i + 2)).reverse());
}
return result.reverse().toString();
}
// 16转10进制
public static 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"};
StringBuilder out = new StringBuilder();
for (j = 0; j < inarray.length; ++j) {
in = (int) inarray[j] & 0xff;
i = (in >> 4) & 0x0f;
out.append(hex[i]);
i = in & 0x0f;
out.append(hex[i]);
} return out.toString();
}
}
大家有什么问题可以在下方留言
