protected override void onCreate(android.os.Bundle savedInstanceState)
        {
            // https://sites.google.com/a/jsc-solutions.net/work/knowledge-base/15-dualvr/20160102/x360videos
            // https://sites.google.com/a/jsc-solutions.net/work/knowledge-base/15-dualvr/20151006
            base.onCreate(savedInstanceState);


            nativeOnCreate(this);

            //setCurrentLanguage(Locale.getDefault().getLanguage());

            // Create the SoundPool
            soundPool           = new SoundPool(3 /* voices */, AudioManager.STREAM_MUSIC, 100);
            soundPoolSoundIds   = new java.util.ArrayList <int>();
            soundPoolSoundNames = new java.util.ArrayList <string>();

            AudioManager audioMgr;

            audioMgr = (AudioManager)getSystemService(Context.AUDIO_SERVICE);
            var rate = audioMgr.getProperty(AudioManager.PROPERTY_OUTPUT_SAMPLE_RATE);
            var size = audioMgr.getProperty(AudioManager.PROPERTY_OUTPUT_FRAMES_PER_BUFFER);

            System.Console.WriteLine("rate = " + rate);
            System.Console.WriteLine("size = " + size);

            // Check preferences
            SharedPreferences prefs = getApplicationContext().getSharedPreferences("oculusvr", MODE_PRIVATE);
            var username            = prefs.getString("username", "guest");

            System.Console.WriteLine("username = "******"action:" + intent.getAction());
            System.Console.WriteLine("type:" + intent.getType());
            System.Console.WriteLine("fromPackageName:" + fromPackageNameString);
            System.Console.WriteLine("command:" + commandString);
            System.Console.WriteLine("uri:" + uriString);

            SurfaceView sv = new SurfaceView(this);

            setContentView(sv);


            #region xCallback
            // X:\jsc.svn\examples\java\android\synergy\OVRVrCubeWorldSurfaceView\OVRVrCubeWorldSurfaceView\ApplicationActivity.cs
            var xCallback = new xCallback
            {
                onsurfaceCreated = holder =>
                {
                    if (appPtr == 0)
                    {
                        return;
                    }

                    nativeSurfaceCreated(appPtr, holder.getSurface());
                    mSurfaceHolder = holder;
                },

                onsurfaceChanged = (SurfaceHolder holder, int format, int width, int height) =>
                {
                    if (appPtr == 0)
                    {
                        return;
                    }

                    nativeSurfaceChanged(appPtr, holder.getSurface());
                    mSurfaceHolder = holder;
                },

                onsurfaceDestroyed = holder =>
                {
                    if (appPtr == 0)
                    {
                        return;
                    }

                    nativeSurfaceDestroyed(appPtr);
                    mSurfaceHolder = holder;
                }
            };
            #endregion

            sv.getHolder().addCallback(xCallback);

            // Force the screen to stay on, rather than letting it dim and shut off
            // while the user is watching a movie.
            //getWindow().addFlags( WindowManager_LayoutParams.FLAG_KEEP_SCREEN_ON );

            //// Force screen brightness to stay at maximum
            //WindowManager.LayoutParams params = getWindow().getAttributes();
            //params.screenBrightness = 1.0f;
            //getWindow().setAttributes( params );

            this.ondispatchTouchEvent += (e) =>
            {
                int   action = e.getAction();
                float x      = e.getRawX();
                float y      = e.getRawY();
                Log.d(TAG, "onTouch dev:" + e.getDeviceId() + " act:" + action + " ind:" + e.getActionIndex() + " @ " + x + "," + y);
                nativeTouch(appPtr, action, x, y);
                return(true);
            };

            this.ondispatchKeyEvent = (e) =>
            {
                bool down;
                int  keyCode  = e.getKeyCode();
                int  deviceId = e.getDeviceId();

                if (e.getAction() == KeyEvent.ACTION_DOWN)
                {
                    down = true;
                }
                else if (e.getAction() == KeyEvent.ACTION_UP)
                {
                    down = false;
                }
                else
                {
                    Log.d(TAG,
                          "source " + e.getSource() + " action "
                          + e.getAction() + " keyCode " + keyCode);

                    return(base.dispatchKeyEvent(e));
                }

                Log.d(TAG, "source " + e.getSource() + " keyCode " + keyCode + " down " + down + " repeatCount " + e.getRepeatCount());

                if (keyCode == KeyEvent.KEYCODE_VOLUME_UP)
                {
                    if (down)
                    {
                        adjustVolume(1);
                    }
                    return(true);
                }

                if (keyCode == KeyEvent.KEYCODE_VOLUME_DOWN)
                {
                    if (down)
                    {
                        adjustVolume(-1);
                    }
                    return(true);
                }


                // Joypads will register as keyboards, but keyboards won't
                // register as position classes
                // || event.getSource() != 16777232)
                // Volume buttons are source 257
                if (e.getSource() == 1281)
                {
                    // do we have one we can test with?

                    //keyCode |= JoyEvent.BUTTON_JOYPAD_FLAG;
                }
                return(buttonEvent(deviceId, keyCode, down, e.getRepeatCount()));
            };
        }
        protected override void onCreate(android.os.Bundle savedInstanceState)
        {
            // https://sites.google.com/a/jsc-solutions.net/work/knowledge-base/15-dualvr/20160102/x360videos
            // https://sites.google.com/a/jsc-solutions.net/work/knowledge-base/15-dualvr/20151006
            base.onCreate(savedInstanceState);


            nativeOnCreate(this);

            //setCurrentLanguage(Locale.getDefault().getLanguage());

            // Create the SoundPool
            soundPool = new SoundPool(3 /* voices */, AudioManager.STREAM_MUSIC, 100);
            soundPoolSoundIds = new java.util.ArrayList<int>();
            soundPoolSoundNames = new java.util.ArrayList<string>();

            AudioManager audioMgr;
            audioMgr = (AudioManager)getSystemService(Context.AUDIO_SERVICE);
            var rate = audioMgr.getProperty(AudioManager.PROPERTY_OUTPUT_SAMPLE_RATE);
            var size = audioMgr.getProperty(AudioManager.PROPERTY_OUTPUT_FRAMES_PER_BUFFER);
            System.Console.WriteLine("rate = " + rate);
            System.Console.WriteLine("size = " + size);

            // Check preferences
            SharedPreferences prefs = getApplicationContext().getSharedPreferences("oculusvr", MODE_PRIVATE);
            var username = prefs.getString("username", "guest");
            System.Console.WriteLine("username = "******"action:" + intent.getAction());
            System.Console.WriteLine("type:" + intent.getType());
            System.Console.WriteLine("fromPackageName:" + fromPackageNameString);
            System.Console.WriteLine("command:" + commandString);
            System.Console.WriteLine("uri:" + uriString);

            SurfaceView sv = new SurfaceView(this);
            setContentView(sv);


            #region xCallback
            // X:\jsc.svn\examples\java\android\synergy\OVRVrCubeWorldSurfaceView\OVRVrCubeWorldSurfaceView\ApplicationActivity.cs
            var xCallback = new xCallback
            {
                onsurfaceCreated = holder =>
                {
                    if (appPtr == 0)
                        return;

                    nativeSurfaceCreated(appPtr, holder.getSurface());
                    mSurfaceHolder = holder;
                },

                onsurfaceChanged = (SurfaceHolder holder, int format, int width, int height) =>
                {
                    if (appPtr == 0)
                        return;

                    nativeSurfaceChanged(appPtr, holder.getSurface());
                    mSurfaceHolder = holder;
                },

                onsurfaceDestroyed = holder =>
                {
                    if (appPtr == 0)
                        return;

                    nativeSurfaceDestroyed(appPtr);
                    mSurfaceHolder = holder;
                }
            };
            #endregion

            sv.getHolder().addCallback(xCallback);

            // Force the screen to stay on, rather than letting it dim and shut off
            // while the user is watching a movie.
            //getWindow().addFlags( WindowManager_LayoutParams.FLAG_KEEP_SCREEN_ON );

            //// Force screen brightness to stay at maximum
            //WindowManager.LayoutParams params = getWindow().getAttributes();
            //params.screenBrightness = 1.0f;
            //getWindow().setAttributes( params );

            this.ondispatchTouchEvent += (e) =>
            {
                int action = e.getAction();
                float x = e.getRawX();
                float y = e.getRawY();
                Log.d(TAG, "onTouch dev:" + e.getDeviceId() + " act:" + action + " ind:" + e.getActionIndex() + " @ " + x + "," + y);
                nativeTouch(appPtr, action, x, y);
                return true;
            };

            this.ondispatchKeyEvent = (e) =>
            {
                bool down;
                int keyCode = e.getKeyCode();
                int deviceId = e.getDeviceId();

                if (e.getAction() == KeyEvent.ACTION_DOWN)
                {
                    down = true;
                }
                else if (e.getAction() == KeyEvent.ACTION_UP)
                {
                    down = false;
                }
                else
                {
                    Log.d(TAG,
                            "source " + e.getSource() + " action "
                                    + e.getAction() + " keyCode " + keyCode);

                    return base.dispatchKeyEvent(e);
                }

                Log.d(TAG, "source " + e.getSource() + " keyCode " + keyCode + " down " + down + " repeatCount " + e.getRepeatCount());

                if (keyCode == KeyEvent.KEYCODE_VOLUME_UP)
                {
                    if (down)
                    {
                        adjustVolume(1);
                    }
                    return true;
                }

                if (keyCode == KeyEvent.KEYCODE_VOLUME_DOWN)
                {
                    if (down)
                    {
                        adjustVolume(-1);
                    }
                    return true;
                }


                // Joypads will register as keyboards, but keyboards won't
                // register as position classes
                // || event.getSource() != 16777232)
                // Volume buttons are source 257
                if (e.getSource() == 1281)
                {
                    // do we have one we can test with?

                    //keyCode |= JoyEvent.BUTTON_JOYPAD_FLAG;
                }
                return buttonEvent(deviceId, keyCode, down, e.getRepeatCount());
            };
        }