使用NFC_EXTRAS在Android ICS上启用CardEmulation

在进行了大量研究以在Android上模拟mifare 4K后,我发现存在的唯一补丁是针对2.3.4.在StackOverFlow中,NFCGuy告诉我们,自Android的API 14以来,它不是ROM的必要补丁,因此我们可以使用隐藏的Nfc_extras包打开卡仿真.

我使用带反射的NFC_EXTRAS编译了一个APK,并将我的签名和包添加到了nfcee_access.xml.

在我将cardEmulationRoute设置为ON_WHEN_SCREEN_ON之后,我在logcat中得到一个输出,告诉我NFCEE为ON且NFC_CC为ON,但是当我让我的Nexus S接近ACR122时,它没有检测到2.3.4补丁制造商可能的仿真mifare 4K得到.我可以得到一张无法识别的智能卡(我想这是SE就像一张智能卡),但我需要使用模拟的mifare.

我是否需要修改lib-nfc,因为它在2.3.4补丁中被修改以使该applet正常工作(mifare Manager)？或者我的应用程序访问该包应该是什么？

我正在下载android源码以将2.3.4补丁移植到4.1,但是看看他们发布的差异,lib-nfc库上只有4.1的区别. (定义评论,理论上用于卡片仿真)

也许没有必要重新编译一个修改过的ROM,我错过了一小步来获得模拟的mifare 4k.

感谢StackOverFlow中所有人的帮助

问候

private void getSecureElement(){
    try{
        //Obtenemos la clase NFCAdapterExtras
        Class nfcExtrasClazz = Class.forName("com.android.nfc_extras.NfcAdapterExtras");

        if (nfcExtrasClazz == null){
            Log.w("EnableCardEmu","No existe la clase Extras");
            return;
        }

        Log.w("EnableCardEmu","Existe la clase");

        //Obtenemos el método "get" de dicha clase
        Method getmethod = nfcExtrasClazz.getmethod("get",Class.forName("android.nfc.NfcAdapter"));

        if (getmethod == null) {
            Log.w("EnableCardEmu","No existe el método");
        } else {
            Log.w("EnableCardEmu","Existe el método");
            //Obtenemos el manager del componente NFC del dispositivo
            NfcAdapter adapter = NfcAdapter.getDefaultAdapter(this);

            if (adapter == null)
                Log.w("EnableCardEmu","Adapter es null");
            else {
                //Instancia del SecureElement
                Log.w("EnableCardEmu","Adapter NO es null");
                nfcExtras = getmethod.invoke(null,adapter);

                Method getEEMethod = nfcExtras.getClass().getmethod("getEmbeddedExecutionEnvironment",(Class[]) null);
                embebbed = getEEMethod.invoke(nfcExtras,(Object[]) null);
            }
        }
    } catch (InvocationTargetException ee){
        Log.w("EnableCardEmu",ee.getTargetException());
    }
    catch (Exception e){
        Log.w("EnableCardEmu",e.getClass().getName() + " / " + e.getMessage());
        StackTraceElement[] a = e.getStackTrace();
        for (StackTraceElement aa : a){
            Log.w("EnableCardEmu",aa.toString());
        }
    } 
}

    private void deactivateCardEmulation(){
    try{
        Class clss = Class.forName("com.android.nfc_extras.NfcAdapterExtras");
        Class[] cs = clss.getDeclaredClasses();
        /*          
        for (Class cc : cs){
            Log.w("EnableCardEmu",cc.getName();)
        }*/

        //Class route = Class.forName("com.android.nfc_extras.NfcAdapterExtras$CardEmulationRoute");
        Constructor c = cs[0].getConstructor(Integer.TYPE,Class.forName("com.android.nfc_extras.NfcExecutionEnvironment"));
        Object routeOn = c.newInstance(1,null);

        Class cls = nfcExtras.getClass();           
        Method mtd = cls.getmethod("setCardEmulationRoute",cs[0]);
        mtd.invoke(nfcExtras,routeOn);
    } catch (InvocationTargetException ee){
        Log.w("EnableCardEmu",ee.getTargetException());
    } catch (Exception e){
        Log.w("EnableCardEmu",e.getClass().getName() + " / " + e.getMessage());
    }
}

    private void activateCardEmulation(){
    try{

        Class clss = Class.forName("com.android.nfc_extras.NfcAdapterExtras");
        Class[] cs = clss.getDeclaredClasses();
        /*          
        for (Class cc : cs){
            Log.w("EnableCardEmu",Class.forName("com.android.nfc_extras.NfcExecutionEnvironment"));
        Object routeOn = c.newInstance(2,embebbed);

        Class cls = nfcExtras.getClass();           
        Method mtd = cls.getmethod("setCardEmulationRoute",e.getClass().getName() + " / " + e.getMessage());
    }
}