//通过openRawResource获取一个inputStream对象        InputStream inputStream = getResources().openRawResource(R.drawable.temp);        //通过一个InputStream创建一个BitmapDrawable对象        BitmapDrawable drawable = new BitmapDrawable(inputStream);        //通过BitmapDrawable对象获得Bitmap对象        Bitmap bitmap = drawable.getBitmap();        //利用Bitmap对象创建缩略图        bitmap = ThumbnailUtils.extractThumbnail(bitmap, 51, 108);        //imageView 显示缩略图的ImageView        imageView.setImageBitmap(bitmap);