How to use Camera Preview of Portrait

If Camera Preview's oientation is incorrect when the device is Portrait, you should read following developer's site.


http://developer.android.com/reference/android/hardware/Camera.html#setDisplayOrientation(int)

Sample code:

 public void surfaceCreated(SurfaceHolder holder) {
      mCamera = Camera.open();
      setCameraDisplayOrientation();
 }

 private void setCameraDisplayOrientation(){
      int rotation = mWindowManager.getDefaultDisplay().getRotation();
      
      Camera.CameraInfo info = new Camera.CameraInfo();
      // camera id is ...
      Camera.getCameraInfo(0, info);
      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;
      }
      mCamera.setDisplayOrientation(result);
 }