滚动时，gridview中的图像重复

Question

当我开始滚动我的视图时。它重复图像，但当我点击它打开正确的图像。我尝试了很多解决方案，但我仍然无法修复它。我在converView中尝试了很多东西。但它不断重复图像并将其置于视野中。

  @Override
public View getView(int position, View convertView, ViewGroup parent) {

    ImageView imageView;
    View v;
    if (convertView == null) {
       /* LayoutInflater inflater = (LayoutInflater) context.getSystemService(     Context.LAYOUT_INFLATER_SERVICE );
        v = inflater.inflate(R.layout.gridview_item_layout, parent, false);
*/
        imageView = new ImageView(context);
        if(images.get(position).contains(".jpg"))
        {
            bm = BitmapFactory.decodeFile(images.get(position)); //Creation of Thumbnail of image
        }

        else if(images.get(position).contains(".mp4"))
        {
            bm = ThumbnailUtils.createVideoThumbnail(images.get(position), 0); //Creation of Thumbnail of video
        }

        imageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
        imageView.setPadding(8,8,8,8);
        imageView.setLayoutParams(new GridView.LayoutParams(300, 300));


    } else {

        imageView = (ImageView) convertView;


    }
    imageView.setImageBitmap(bm);


return imageView;
}
 }