Android:摄像头预览开启时的NFC检测

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

@Override
protected void onResume() {
    super.onResume();
    // 检查设备是否支持NFC
    NfcAdapter nfcAdapter = NfcAdapter.getDefaultAdapter(this);
    if (nfcAdapter != null && nfcAdapter.isEnabled()) {
        // 启用前台调度系统，用于处理NFC事件
        PendingIntent pendingIntent = PendingIntent.getActivity(this, 0, new Intent(this, getClass()).addFlags(Intent.FLAG_ACTIVITY_SINGLE_TOP), 0);
        IntentFilter[] intentFilters = new IntentFilter[]{new IntentFilter(NfcAdapter.ACTION_TECH_DISCOVERED)};
        String[][] techLists = new String[][]{{NfcF.class.getName()}};
        nfcAdapter.enableForegroundDispatch(this, pendingIntent, intentFilters, techLists);
    }
}

@Override
protected void onPause() {
    super.onPause();
    // 禁用前台调度系统
    NfcAdapter nfcAdapter = NfcAdapter.getDefaultAdapter(this);
    if (nfcAdapter != null) {
        nfcAdapter.disableForegroundDispatch(this);
    }
}

@Override
protected void onNewIntent(Intent intent) {
    super.onNewIntent(intent);
    // 处理NFC事件
    if (NfcAdapter.ACTION_TECH_DISCOVERED.equals(intent.getAction())) {
        // 处理NFC标签或设备的数据交互
        // ...
    }
}