package com.example.nfc.ui; import java.nio.charset.Charset; import android.content.Intent; import android.nfc.NfcAdapter; import android.nfc.Tag; import android.nfc.tech.MifareUltralight; import android.os.Bundle; import android.widget.Toast; import com.example.nfc.R; import com.example.nfc.base.BaseNfcActivity; public class ReadMUActivity extends BaseNfcActivity { @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.activity_read_mu); } @Override public void onNewIntent(Intent intent) { Tag tag = intent.getParcelableExtra(NfcAdapter.EXTRA_TAG); String[] techList = tag.getTechList(); boolean haveMifareUltralight = false; for (String tech : techList) { if (tech.indexOf("MifareUltralight") >= 0) { haveMifareUltralight = true; break; } } if (!haveMifareUltralight) { Toast.makeText(this, "不支持MifareUltralight数据格式", Toast.LENGTH_SHORT).show(); return; } String data = readTag(tag); if (data != null) Toast.makeText(this, data, Toast.LENGTH_SHORT).show(); } public String readTag(Tag tag) { MifareUltralight ultralight = MifareUltralight.get(tag); try { ultralight.connect(); byte[] data = ultralight.readPages(4); return new String(data, Charset.forName("GB2312")); } catch (Exception e) { } finally { try { ultralight.close(); } catch (Exception e) { } } return null; } }