Android : Method not being succesfully called

My goals is to start a new Activity while a NFC card (DESFire in my case) is being detected. With using MIFARE SDK I received a few tutorials on how to write a program for NFC card to be detected.

This is the sample code example with some of my modifications in it:

public void onNewIntent(Intent intent){
        libInstance.filterIntent(intent, new Inxpnfclibcallback(){

            @Override
            public void onDESFIRECardDetected(final DESFire desfire) {
                // TODO Auto-generated method stub
                ShowMessage("Im here", 'a');
                objDesfire = desfire;
                if (desfire == null) {
                    ShowMessage("Error!", 'a');
                }
                flag = true;
                Log.i(TAG, "DESFire Card Detected");
                try{
                    objDesfire.connectL4();
                    objDesfire.authenticate(AuthType.Native, 2, (byte) 0, 0, 0, null,
                            false);
                    objDesfire.setTimeout(2000);
                    objDesfire.format();
                    flag = true;


                } catch (IOException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                } catch (GeneralSecurityException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                } catch (SmartCardException e) {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }finally{
                    ShowMessage ("Error Occured!", 't');
                }
            }

I want to call this method while my Animation ends. I use "setAnimationListener". And "onAnimationEnd" I wrote this:

    @Override
    public void onAnimationEnd(Animation arg0) {
        // TODO Auto-generated method stub
        //startActivity(Main_activity);

        MyClass myC = new MyClass();

        logoMusic.stop();
        Toast.makeText(IntroActivity.this, "Please tap your MIFARE Card", Toast.LENGTH_LONG).show();
        myC.onNewIntent(getIntent());
        if(flag == true){
            Intent menuIntent = new Intent("com.example.nfcapp.MAINACT");
            startActivity(menuIntent);
        }
        }

I tried to surround "onNewIntent" with a random class I created and then called it within "onAnimationEnd":

 public class MyClass{ *...Inside here is the code from onNewIntent...*}

But this does not work. The Application runs without Errors. But when the Animation ends, the screen just remains the same, even if I tap the NFC card.

Can someone pleae help me how to fix this? I know I`m a beginner in Java, that's why I need your help.