.....
/**
* An {@link Activity} showing a tuggable "Hello World!" card.
* <p>
* The main content view is composed of a one-card {@link CardScrollView} that provides tugging
* feedback to the user when swipe gestures are detected.
* If your Glassware intends to intercept swipe gestures, you should set the content view directly
* and use a {@link com.google.android.glass.touchpad.GestureDetector}.
* @see <a href="https://developers.google.com/glass/develop/gdk/touch">GDK Developer Guide</a>
*/
public class MainActivity extends Activity {
    /**
     * {@link CardScrollView} to use as the main content view.
     */
    private CardScrollView mCardScroller;
    /**
     * "Hello World!" {@link View} generated by {@link #buildView()}.
     */
    private View mView;
    @Override
    protected void onCreate(Bundle bundle) {
        super.onCreate(bundle);
        mView = buildView();
        mCardScroller = new CardScrollView(this);
        mCardScroller.setAdapter(new CardScrollAdapter() {
            @Override
    		public int getCount() {
                return 1;
            }
            @Override
            public Object getItem(int position) {
                return mView;
            }
            @Override
            public View getView(int position, View convertView, ViewGroup parent) {
                return mView;
            }
            @Override
            public int getPosition(Object item) {
                if (mView.equals(item)) {
                    return 0; 
                }
                return AdapterView.INVALID_POSITION;
            }
        });
        // Handle the TAP event.
        mCardScroller.setOnItemClickListener(new AdapterView.OnItemClickListener() {
            @Override
            public void onItemClick(AdapterView<?> parent, View view, int position, long id) {
              // Plays disallowed sound to indicate that TAP actions are not supported.
 	            AudioManager am = (AudioManager) getSystemService(Context.AUDIO_SERVICE);
 	            am.playSoundEffect(Sounds.DISALLOWED);
            }});
        setContentView(mCardScroller); 
    }
    @Override
    protected void onResume() {
        super.onResume();
        mCardScroller.activate();
    }
    @Override
    protected void onPause() {
        mCardScroller.deactivate();
        super.onPause();
    }
    /**
    * Builds a Glass styled "Hello World!" view using the {@link CardBuilder} class.
    */
    private View buildView() {
        CardBuilder card = new CardBuilder(this, CardBuilder.Layout.TEXT);
        card.setText(R.string.hello_world);
        return card.getView();
    }
}

//
// A simple activity class that allows us to use Vuzix Voice Control
// to create and manipulate circles and squares (graphically)
//
public class MainActivity extends Activity {
    private ColorDemoSpeechRecognizer mSR;
    private Canvas mCanvas;
    private Bitmap mBG;
    private ArrayList<ShapeInfo> mShapes;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        // set up speech recognizer
        mSR = new ColorDemoSpeechRecognizer(this);
        if (mSR == null)
        {
            Toast.makeText(this,"Unable to create Speech Recognizer",Toast.LENGTH_SHORT).show();
            return;
        }
        loadCustomGrammar();
        Toast.makeText(this,"Speech Recognizer CREATED, turning on",Toast.LENGTH_SHORT).show();
        android.util.Log.i("VUZIX-VoiceDemo","Turning on Speech Recognition");
        mSR.on();
        // Set up drawing canvas
        mBG = Bitmap.createBitmap(432,200,Bitmap.Config.ARGB_8888);
        mCanvas = new Canvas(mBG);
    }
    @Override
    public void onDestroy()
    {
        if (mSR != null)
        {
            mSR.destroy();
        }
        super.onDestroy();
    }
    @Override
    public void onPause()
    {
        android.util.Log.i("VUZIX-VoiceDemo","onPause(), stopping speech recognition");
        if (mSR != null)
        {
            mSR.off();
        }
        super.onPause();
    }
    @Override
    public void onResume()
    {
        super.onResume();
        android.util.Log.i("VUZIX-VoiceDemo", "onResume(), restarting speech recognition");
        if (mSR != null)
        {
            mSR.on();
        }
    }
    @Override
    public boolean onCreateOptionsMenu(Menu menu) {
        getMenuInflater().inflate(R.menu.menu_main, menu);
        return true;
    }
    @Override
    public boolean onOptionsItemSelected(MenuItem item) {
        int id = item.getItemId();
        //noinspection SimplifiableIfStatement
        if (id == R.id.action_settings) {
            return true;
        }
        return super.onOptionsItemSelected(item);
    }
    
    private void loadCustomGrammar(){
        android.util.Log.i("VUZIX-VoiceDemo", "copyGrammar()");
        final android.content.res.Resources resources = getResources();
        final android.content.res.AssetManager assets = resources.getAssets();
        try
        {
            final java.io.InputStream fi = assets.open("drawing_custom.lcf");
            byte[] buf = new byte[fi.available()];
            while (fi.read(buf) > 0){ }
            fi.close();
            mSR.addGrammar(buf,"Color Demo Grammar");
        }
        catch(java.io.IOException ex)
        {
            android.util.Log.e("VUZIX-VoiceDemo",""+ex);
        }
        android.util.Log.i("VUZIX-VoiceDemo", "Done writing grammar files.\n");
    }
}

// our custom extension of the com.vuzix.speech.VoiceControl class.    This class    
// will contain the callback (onRecognition()) which is used to handle spoken
// commands detected.
public class ColorDemoSpeechRecognizer extends VoiceControl
{
    private int mSelectedItem = 0;
    public ColorDemoSpeechRecognizer(Context context) {
        super(context);
    }
    protected void onRecognition(String result)
    {
        android.util.Log.i("VUZIX-VoiceDemo","onRecognition: "+result);
        Toast.makeText(MainActivity.this,"Speech Command Received: "+result,Toast.LENGTH_SHORT).show();
    }
}