Java 从NFC读取标签时，Android活动挂起或屏幕冻结

我正在开发一个Android应用程序，它具有从NFC卡读取NFC标签ID的功能。我使用以下代码从卡中读取NFC标签

@Override
protected void onNewIntent(Intent intent) {
    ReadNFCTagFromIntent(intent);
}

private void ReadNFCTagFromIntent(Intent intent) {
    byte[] inarray = intent.getByteArrayExtra(NfcAdapter.EXTRA_ID);

    int i, j, in;
        String[] hex = { "0", "1", "2", "3", "4", "5", "6", "7", "8", "9",
                "A", "B", "C", "D", "E", "F" };
        String nfc_card_tag = "";
        for (j = 0; j < inarray.length; ++j) {
            in = (int) inarray[j] & 0xff;
            i = (in >> 4) & 0x0f;
            nfc_card_tag += hex[i];
            i = in & 0x0f;
            nfc_card_tag += hex[i];
        }

    ShowDialog(nfc_card_tag); // This function Will Display a Dialog With Tag Value....
}

这是我在清单文件中的活动声明

<activity android:name="ActHome"
  android:launchMode="singleTask"
  android:theme="@android:style/Theme.Black.NoTitleBar.Fullscreen" >

        <intent-filter>
            <action android:name="android.nfc.action.TAG_DISCOVERED" />
            <category android:name="android.intent.category.DEFAULT" />
        </intent-filter>

        <intent-filter>
            <action android:name="android.nfc.action.TECH_DISCOVERED" />
        </intent-filter>


        <meta-data android:name="android.nfc.action.TECH_DISCOVERED" android:resource="@xml/nfctechlist" />

       <intent-filter>
            <action android:name="android.nfc.action.NDEF_DISCOVERED" />
       </intent-filter>

这是我用于TechU发现的资源文件中的xml

<?xml version="1.0" encoding="utf-8"?>
<resources xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
    <tech-list>
        <tech>android.nfc.tech.IsoDep</tech>
    </tech-list>
    <tech-list>
        <tech>android.nfc.tech.NfcA</tech>
    </tech-list>
    <tech-list>
        <tech>android.nfc.tech.NfcB</tech>
    </tech-list>
    <tech-list>
        <tech>android.nfc.tech.NfcF</tech>
    </tech-list>
    <tech-list>
        <tech>android.nfc.tech.NfcV</tech>
    </tech-list>
    <tech-list>
        <tech>android.nfc.tech.Ndef</tech>
    </tech-list>
    <tech-list>
        <tech>android.nfc.tech.NdefFormatable</tech>
    </tech-list>
    <tech-list>
        <tech>android.nfc.tech.MifareClassic</tech>
    </tech-list>
    <tech-list>
        <tech>android.nfc.tech.MifareUltralight</tech>
    </tech-list>
</resources>

此代码工作正常，但问题是当我尝试将nfc卡连接到设备时，我的活动至少会挂起/冻结10/15秒，然后根据我的代码显示对话框。如果我试着一张接一张地连续贴上5到6张卡片，那么它会在10-15秒后同时显示所有对话框。我不知道为什么在读NFC卡上的标签时我的活动被挂起来了

---

提前感谢

您尝试过使用新线程吗？您能举例说明如何将我的代码放入线程吗？

<?xml version="1.0" encoding="utf-8"?>
<resources xmlns:xliff="urn:oasis:names:tc:xliff:document:1.2">
    <tech-list>
        <tech>android.nfc.tech.IsoDep</tech>
    </tech-list>
    <tech-list>
        <tech>android.nfc.tech.NfcA</tech>
    </tech-list>
    <tech-list>
        <tech>android.nfc.tech.NfcB</tech>
    </tech-list>
    <tech-list>
        <tech>android.nfc.tech.NfcF</tech>
    </tech-list>
    <tech-list>
        <tech>android.nfc.tech.NfcV</tech>
    </tech-list>
    <tech-list>
        <tech>android.nfc.tech.Ndef</tech>
    </tech-list>
    <tech-list>
        <tech>android.nfc.tech.NdefFormatable</tech>
    </tech-list>
    <tech-list>
        <tech>android.nfc.tech.MifareClassic</tech>
    </tech-list>
    <tech-list>
        <tech>android.nfc.tech.MifareUltralight</tech>
    </tech-list>
</resources>