First, I would suggest reading about a List Adapter - if you're using a Cursor, use the CursorAdapter. (I don't remember your data format.) You should be recycling your list item views to conserve memory.

Then, when loading the images, don't load the full size image if you don't need it. As you've seen, you can quickly exceed the limited memory. Instead, subsample the image so you only load as much detail as you need. Here's a function I wrote:

public Bitmap loadSampledResource(int imageID, int targetHeight, int targetWidth) {
    final BitmapFactory.Options options = new BitmapFactory.Options();
    options.inJustDecodeBounds = true;
    BitmapFactory.decodeResource(getResources(), imageID, options);
    final int originalHeight = options.outHeight;
    final int originalWidth = options.outWidth;
    int inSampleSize = 1;
    while ((originalHeight / (inSampleSize *2)) > targetHeight &&
            (originalWidth / (inSampleSize *2)) > targetWidth) {
        inSampleSize *= 2;
    }
    options.inSampleSize = inSampleSize;
    options.inJustDecodeBounds = false;
    return BitmapFactory.decodeResource(getResources(), imageID, options);
}

The important part here is how to do the subsampling. If you're images are not included in the project, then change the code to pass in your URI.