Android：屏幕方向报告太慢了？

Display myDisplay = ((WindowManager) getSystemService(WINDOW_SERVICE)).getDefaultDisplay();         
int rotation = myDisplay.getOrientation();
switch (rotation) {
    case Surface.ROTATION_0: { doSomething(); break; }
    case Surface.ROTATION_90: { doSomething(); break; }                 
    case Surface.ROTATION_270: { doSomething(); break; }                    
    case Surface.ROTATION_180: { doSomething(); break; }
}

    myOrientationEventListener = new OrientationEventListener(this, SensorManager.SENSOR_DELAY_NORMAL)
    {

        @Override
        public void onOrientationChanged(int iAngle)
        {                         // 0  15 30 45 60 75, 90 105, 120, 135, 150, 165, 180, 195, 210, 225, 240, 255, 270, 285, 300, 315, 330, 345
            final int iLookup[] = {0,   0, 0,90,90, 90,90, 90,  90, 180, 180, 180, 180, 180, 180, 270, 270, 270, 270, 270, 270, 0, 0, 0}; // 15-degree increments 
            if (iAngle != ORIENTATION_UNKNOWN)
            {
                int iNewOrientation = iLookup[iAngle / 15];
                if (iOrientation != iNewOrientation)
                {
                iOrientation = iNewOrientation;
                <do something with new orientation>
                }  
            }
        }
    };