Universal Image Loader图像缩放失真

Question

我有ListView，每行显示一张图片和一些文字。使用Universal Image Loader在运行时动态加载图片。它的工作原理，但问题是图片没有正确缩放。我希望它们被缩放以保持其原始宽高比，但是它们被拉伸以填充其容器的方形尺寸，从而扭曲了许多图像。

listview适配器是：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:background="@android:color/transparent">

    <ImageView
        android:id="@+id/image"
        android:layout_width="40dp"
        android:layout_height="40dp"
        android:layout_margin="6dp"
        android:scaleType="fitCenter"
        android:adjustViewBounds="true"
        android:src="@drawable/my_img"/>

    <TextView
        android:layout_toRightOf="@+id/image"
        android:textSize="16sp"
        android:id="@+id/coach_name"
        android:layout_centerVertical="true"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content" />

</RelativeLayout>

图像在运行时从服务器加载。这是适配器类：

public class CoachAdapter extends ArrayAdapter<String> {

    private static Context context;
    private ArrayList<String> coach_list;
    private DisplayImageOptions doption=null;
    private ImageLoadingListener animateFirstListener =null;

    public CoachAdapter(Context context, int textViewResourceId, ArrayList<String> coach_list) {
        super(context, textViewResourceId, coach_list);

        this.context = context;
        this.coach_list = coach_list;

        doption=new DisplayImageOptions.Builder()
                .showImageForEmptyUri(R.drawable.my_img)
                .showImageOnFail(R.drawable.my_img)
                .showImageOnLoading(R.drawable.my_img)
                .cacheInMemory(true)
                .cacheOnDisk(true)
                .displayer(new RoundedBitmapDisplayer(8))
                .imageScaleType(ImageScaleType.EXACTLY)
                .postProcessor(new BitmapProcessor() {
                    @Override
                    public Bitmap process(Bitmap bmp) {
                        return Bitmap.createScaledBitmap(bmp, 32, 32, false);
                    }
                })
                .build();
        animateFirstListener = new AnimateFirstDisplayListener();
    }

    @Override
    public View getDropDownView(int position, View convertView, ViewGroup parent) {
        return getCustomView(position, convertView, parent);
    }

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        return getCustomView(position, convertView, parent);
    }


    public View getCustomView(int position, View convertView, ViewGroup parent) {
        View row = convertView;
        final ViewHolder holder;

        if (convertView == null) {
            LayoutInflater inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            row = inflater.inflate(R.layout.row_coach, parent, false);

            holder = new ViewHolder();
            holder.text = (TextView) row.findViewById(R.id.coach_name);
            holder.image = (ImageView) row.findViewById(R.id.image);

            row.setTag(holder);

        } else {
            holder = (ViewHolder) row.getTag();
        }

        String coach_name = coach_list.get(position);

        // get the url string from the database
        Coach this_coach = myDB.getCoachFromName(coach_name);

        String coach_picture_url = this_coach.getCoachPictureURL();

        holder.text.setText(coach_name);
        holder.image.setScaleType(ImageView.ScaleType.FIT_CENTER);

        ImageLoader imageLoader = ImageLoader.getInstance();
        imageLoader.init(ImageLoaderConfiguration.createDefault(context));
        imageLoader.displayImage(url, holder.image, doption, animateFirstListener);

        return row;
    }

    private static class AnimateFirstDisplayListener extends SimpleImageLoadingListener {

        static final List<String> displayedImages = Collections.synchronizedList(new LinkedList<String>());

        @Override
        public void onLoadingComplete(String imageUri, View view, Bitmap loadedImage) {
            if (loadedImage != null) {
                ImageView imageView = (ImageView) view;
                boolean firstDisplay = !displayedImages.contains(imageUri);
                if (firstDisplay) {
                    FadeInBitmapDisplayer.animate(imageView, 500);
                    displayedImages.add(imageUri);
                }
            }
        }
    }

    private class ViewHolder {
        public TextView text;
        public ImageView image;
    }
}

当我阅读UniversalImageLoader文档时，应该根据XML文件中指定的内容对图像进行缩放。我已经尝试了fitCenter和fitXY。无论我指定什么，图像总是方形的。我还验证了许多原始图像的尺寸不是方形的，所以我知道缩放失真发生在这里。

任何人都能看到我做错了什么？谢谢！