如何在Android中将NFC标签设为只读？

<uses-permission android:name="android.permission.NFC" />

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

IntentFilter tagDetected = new IntentFilter(NfcAdapter.ACTION_TAG_DISCOVERED);
IntentFilter[] writeTagFilters = new IntentFilter[] { tagDetected };
nfcAdapter = NfcAdapter.getDefaultAdapter(this);
nfcPendingIntent = PendingIntent.getActivity(this, 0, new Intent(this, getClass()).addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP), 0);

@Override
protected void onNewIntent(Intent intent) {
    super.onNewIntent(intent);
    if (NfcAdapter.ACTION_TAG_DISCOVERED.equals(intent.getAction())) {
        Tag detectedTag = intent.getParcelableExtra(NfcAdapter.EXTRA_TAG);
        Ndef ndef = Ndef.get(detectedTag);
        if (ndef != null) {
            try {
                ndef.connect();
                if (ndef.isWritable()) {
                    // 将NFC标签设为只读
                    ndef.makeReadOnly();
                    Toast.makeText(this, "NFC标签已设为只读", Toast.LENGTH_SHORT).show();
                } else {
                    Toast.makeText(this, "NFC标签不可写入", Toast.LENGTH_SHORT).show();
                }
                ndef.close();
            } catch (IOException | FormatException e) {
                e.printStackTrace();
            }
        }
    }
}