Android Image Rotated and Resized

Question

I looked everywhere for a solution but couldn't use anything useful. I'm using SurfaceView and FrameLayout for custom in-app camera. I have a button that calls "mCamera.takePicture()" function. In the Callback, I save the picture as it is; the problem is that the picture is rotated and flipped, and scaled in weird ratio.

I know that it is happening mostly because I set the camera parameter's setPreviewSize to an optimal size, and rotated it using mCamera.setDisplayOrientation(). The preview looks beautiful. But when I take a picture and save it, that's where it gets messed up.

Camera.Parameters cp = mCamera.getParameters();
Size theSize = getOptimalPreviewSize(opt, w, h);
cp.setPreviewSize(theSize.width, theSize.height);
mCamera.setDisplayOrientation(90);
mCamera.setParameters(cp);

The above code is written in surfaceChanged function.

How do I make the saved picture as it's shown in the preview?

Screenshot of what is shown in the preview of the camera. Size fine, rotation fine:

This is after the picture has been taken. Look at the monitor, collection of CDs and the plug. It's squashed and the monitor looks like a wave:

Answer 1

The image returned in pictureTaken() is not effected by Camera.setDisplayOrientation(). It is in Jpeg compressed format, so you can set JPEG rotation via Exif header without decoding it. This is what Camera.setRotation() often does, but on some devices it actually performs rotation in hardware. This is the most efficient method, but some viewers may still show a rotated image.

Alternatively, you can use JPEG lossless rotation, using jpegtran.

On SourceForge, there is a Java open source class LLJTran. The Android port is on GitHub.