title: Android Camera Preview Rotation
body: <p>According to Android Developer Site:</p>
  
  <p>after android 2.2 there is the function </p>
  
  <p>" setDisplayOrientation "</p>
  
  <p>to adjust the camera preview rotation.</p>
  
  <p>And also according to the Android Developer Site , we can find following source code.</p>
  
  <pre><code>android.hardware.Camera.CameraInfo info =
              new android.hardware.Camera.CameraInfo();
      android.hardware.Camera.getCameraInfo(cameraId, info);
      int rotation = activity.getWindowManager().getDefaultDisplay().getRotation();
      int degrees = 0 ;
      switch ( rotation ) {
          case Surface.ROTATION_0 : degrees = 0 ; break ;
          case Surface.ROTATION_90 : degrees = 90 ; break ;
          case Surface.ROTATION_180 : degrees = 180 ; break ;
          case Surface.ROTATION_270 : degrees = 270 ; break ;
      }
      int result ;
      if ( info.facing == Camera.CameraInfo.CAMERA_FACING_FRONT) {
          result = ( info.orientation + degrees ) % 360 ;
           result = ( 360 - result ) % 360 ;   // compensate the mirror
      } else {   // back-facing
  
          result = ( info.orientation - degrees + 360 ) % 360 ;
  
      }
  </code></pre>
  
  <p>However, i can not work with some kind of Devices.
  Like Samsung Galaxy Y S5360, S5660 , YP-G1, YP-G70, etc</p>
  
  <p>Just part of machine not working, Galaxy Nexus, SII , or some high end device, it work fine.</p>
  
  <p>Does setDisplayOrientation not support , or the devices firmware is not ready?</p>
  
  <p>PS. All devices are Android 2.3.1 or above.</p>
  
  <p>Help.</p>