If you are looking to know, How to get camera rotation while capturing video with custom camera in android, follow below steps

Step 1:-Declare OrientationEventListener and the variable that hold the orientation value.

  OrientationEventListener orientationEventListener;
  int orientationValue;

Step 2:-Initialize OrientationEventListener.

if (orientationEventListener == null)
 {            
   orientationEventListener = new OrientationEventListener(this,   SensorManager.SENSOR_DELAY_NORMAL) 
     {
      @Override
      public void onOrientationChanged(int orientation) 
        {
      if (orientation >= 315 || orientation < 45) //for portrait upside
            {                         
            orientationValue = 1;
        }
      else if (orientation < 315 && orientation >= 225)  //for rightside landscape
            {
              orientationValue = 3;                     
        }
      else if (orientation < 225 && orientation >= 135) //for portrait downside
           {
              orientationValue = 2;                      
       }
     else 
           { // orientation <135 && orientation > 45  for leftside landscape
          orientationValue = 4;
           }   
        }
      };
   }

Step 3:-Enable OrientationEventListener when you prepare MediaRecorder

  if(orientationEventListener.canDetectOrientation()) 
      {
    orientationEventListener.enable();
      }