List View changes position of ImageView On scroll

问题

I am using List View with custom array adapter the adapter sets data from Sqlite. But when the list items reach over 10 (or list becomes scroll able) the Image View changes position automatically if i scrolls continue. here is my custom adapter's code.Thanks

public class CustomeAdapter extends ArrayAdapter<String>{
 public Context context;

 public ArrayList<String> titleArrayList, descArrayList, timeArrayList, imgArrayList, IdArrayList;
    List data;
    int layoutResID;
    private Bitmap myBitmap;

    public CustomeAdapter(Context context, int layoutResourceId, ArrayList<String> titleArrayList, ArrayList<String> descArrayList, ArrayList<String> timeArrayList, ArrayList<String> imgArrayList, ArrayList<String> IdArrayList) {
        super(context, layoutResourceId, titleArrayList);
        this.context = context;
        this.titleArrayList = titleArrayList;
        this.descArrayList = descArrayList;
        this.timeArrayList = timeArrayList;
        this.imgArrayList = imgArrayList;
        this.IdArrayList = IdArrayList;
        this.data = data;
        this.layoutResID = layoutResourceId;

    }

    @Override
    public View getView(final int position, View convertView, ViewGroup parent) {
        View rowView = convertView;
        final StockQuoteView sqView;

        if (rowView == null) {


            LayoutInflater inflater = ((Activity) context).getLayoutInflater();
            rowView = inflater.inflate(layoutResID, parent, false);
            sqView = new StockQuoteView();
            sqView.tag = (TextView) rowView.findViewById(R.id.tv_fullnote);

            sqView.desc = (TextView) rowView.findViewById(R.id.tv_title);
            sqView.time = (TextView) rowView.findViewById(R.id.tv_time);
            sqView.id = (TextView) rowView.findViewById(R.id.id);
            sqView.img = (ImageView) rowView.findViewById(R.id.imageView3);

            sqView.button1 = (ImageView) rowView.findViewById(R.id.swipe_button1);
            sqView.button2 = (ImageView) rowView.findViewById(R.id.swipe_button2);
            sqView.button3 = (ImageView) rowView.findViewById(R.id.swipe_button3);
            sqView.button4 = (ImageView) rowView.findViewById(R.id.swipe_button4);
            rowView.setTag(sqView);
        } else {
            sqView = (StockQuoteView) rowView.getTag();
        }

        try {
            sqView.tag.setText(titleArrayList.get(position));
            sqView.desc.setText(descArrayList.get(position));
            sqView.time.setText(timeArrayList.get(position));
            sqView.id.setText(IdArrayList.get(position));
            sqView.id.setTag(IdArrayList.get(position).toString());
            if (imgArrayList.get(position).contains("null")) {
                sqView.img.setImageBitmap(null);
                sqView.img.setTag("null");
            } else {
                myBitmap = BitmapFactory.decodeFile(imgArrayList.get(position));
                //sqView.img.setImageBitmap((position & 1) == 1 ? myBitmap : myBitmap);
                String TAG = "tag";
                String id = String.valueOf(position);

                sqView.img.setTag(imgArrayList.get(position).toString());
                int width = myBitmap.getWidth();
                int height = myBitmap.getHeight();
                int newWidth = (height > width) ? width : height;
                int newHeight = (height > width) ? height - (height - width) : height;
                int crop = (width - height) / 2;
                crop = (crop < 0) ? 0 : crop;
                Bitmap cropImg = Bitmap.createBitmap(myBitmap, crop, 0, newWidth, newHeight);
                sqView.img.setImageBitmap(cropImg);
            }
        } catch (Exception e) {
            System.out.print(e.toString());
        }


        return rowView;
    }

    protected static class StockQuoteView {
        protected TextView tag;
        protected TextView desc;
        protected TextView time;
        protected ImageView img;
        protected ImageView button1;
        protected ImageView button2;
        protected ImageView button3;
        protected ImageView button4;
        public TextView id;
    }


}
`

回答1:

put this linesqView.img.setVisibility(View.INVISIBLE) after sqView.img.setTag("null"); and Make Visible back the imageView in the else statment like else {sqView.img.setVisibility(View.VISIBLE) myBitmap = BitmapFactory.decodeFile(imgArrayList.get(position)); //sqView.img.setImageBitmap((position & 1) == 1 ? myBitmap : myBitmap); String TAG = "tag"; String id = String.valueOf(position);............} this is tricked only.

来源：https://stackoverflow.com/questions/29317434/list-view-changes-position-of-imageview-on-scroll