来喽来喽!昨晚下班前临时的任务用NFC读取IC卡的。原以为挺难。真正写了发现没几行代码!就先记录下来喽,下面是案例有需要的拿走!
1.获取权限
2.设置NFC活动页
3.Activity代码
//NFC对象
private NfcAdapter mNfcAdapter;
private PendingIntent pi;
1.主方法中:
//获取默认的NFC控制器
//初始化NfcAdapter
mNfcAdapter = NfcAdapter.getDefaultAdapter(this);
if (mNfcAdapter == null) {
Toast.makeText(AddPointActivity.this, "设备不支持NFC!", Toast.LENGTH_LONG).show();
finish();
return;
}
if (!mNfcAdapter.isEnabled()) {
Toast.makeText(AddPointActivity.this, "请在系统设置中先启用NFC功能!", Toast.LENGTH_LONG).show();
finish();
return;
}
//初始化PendingIntent
// 初始化PendingIntent,当有NFC设备连接上的时候,就交给当前Activity处理
pi = PendingIntent.getActivity(this, 0, new Intent(this, getClass())
.addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP), 0);
2.方法
//获取数据
@Override
protected void onNewIntent(Intent intent) {
super.onNewIntent(intent);
// 当前app正在前端界面运行,这个时候有intent发送过来,那么系统就会调用onNewIntent回调方法,将intent传送过来
// 我们只需要在这里检验这个intent是否是NFC相关的intent,如果是,就调用处理方法
if (NfcAdapter.ACTION_TAG_DISCOVERED.equals(intent.getAction())) {
processIntent(intent);
}
}
//启动
@Override
protected void onResume() {
super.onResume();
mNfcAdapter.enableForegroundDispatch(this, pi, null, null);
}
//解析
private void processIntent(Intent intent) {
//取出封装在intent中的TAG
Tag tagFromIntent = intent.getParcelableExtra(NfcAdapter.EXTRA_TAG);
String CardId =ByteArrayToHexString(tagFromIntent.getId());
Toast.makeText(AddPointActivity.this, CardId, Toast.LENGTH_LONG).show();
}
//转为16进制字符串
private 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;
}
运行结果: