Why does image go blur?

I'm trying to develop an app that uses camera API of android. But when i take image using app image goes blurred.

Image using google camera app :

Image using my camera app :

camera parameters part :

Camera.Parameters param;
param = camera.getParameters();
param.setFocusMode(Parameters.FOCUS_MODE_FIXED);
param.setPictureFormat(ImageFormat.JPEG);
param.setJpegQuality(100);
camera.setParameters(param);
camera.startPreview();

Picture callback part :

public void onPictureTaken(byte[] data, Camera camera) {

        bitmap = BitmapFactory.decodeByteArray(data, 0, data.length);
        camera.release();
        preview.setVisibility(View.INVISIBLE);
        image.setVisibility(View.VISIBLE);
        image.setImageBitmap(bitmap);
        File pictureFile = getOutputMediaFile();
        if (pictureFile == null) {
            Log.d("PictureCall",
                    "Error creating media file, check storage permissions");
            return;
        }

        try {
            FileOutputStream fos = new FileOutputStream(pictureFile);
            fos.write(data);
            fos.close();
        } catch (FileNotFoundException e) {
            Log.d("File Excep :", "File not found: " + e.getMessage());
        } catch (IOException e) {
            Log.d("File Excep :", "Error accessing file: " + e.getMessage());
        }

    }