ListItem imageChanging在android中无法正常工作

Question

我有一个ListView，我有一个自定义ListItem，它有一些TextView和一个ImageView。我想在点击时更改该特定图像。我试过但是当我点击ListView中的图像时，下面的listItem图像正在改变。

例如，如果我点击第0个位置图像，那么图像正在改变第1个位置ListIem，当我向上和向下滚动列表时，它会随机变化。

我不知道它发生了什么，我在我的适配器上使用了notifydatasetChanged，但是它无效，我的代码如下。

请帮助我，谢谢，

代码

 private class RssAdapter extends ArrayAdapter<RSSFeed_SelectedHotelResult> {
        private List<RSSFeed_SelectedHotelResult> rssFeedLst;
        int selectedPosition;

        public RssAdapter(Context context, int textViewResourceId,
                List<RSSFeed_SelectedHotelResult> rssFeedLst) {
            super(context, textViewResourceId, rssFeedLst);
            this.rssFeedLst = rssFeedLst;
            Boolean addtoShotlist;
        }

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

            View view = convertView;

            if (convertView == null) {
                view = View.inflate(HotelListActivity.this, R.layout.list_row,
                        null);

                rssHolder = new RssHolder();
                rssHolder.iv_add = (ImageView) view.findViewById(R.id.iv_add);
                rssHolder.rssTitleView = (TextView) view
                        .findViewById(R.id.title);
                rssHolder.tv_offer = (TextView) view.findViewById(R.id.tv_ofr);
                rssHolder.rssImagHotel = (ImageView) view
                        .findViewById(R.id.hotelImage);
                rssHolder.rssImageHotelRate = (ImageView) view
                        .findViewById(R.id.rateHotel2);
                rssHolder.rssHotelPrice = (TextView) view
                        .findViewById(R.id.textHotelRate);
                rssHolder.rssHotelAddress = (TextView) view
                        .findViewById(R.id.textHotelDesc);
                // rssHolder.adres = (TextView) view.findViewById(R.id.adres);
                // rssHolder.rssHotelRating = (TextView)
                // view.findViewById(R.id.textHotelRating);
                rssHolder.rating_hotel = (RatingBar) view
                        .findViewById(R.id.rateHotelImage);
                rssHolder.tv_currcode = (TextView) view
                        .findViewById(R.id.tv_currcode);

                view.setTag(rssHolder);

            } else {
                rssHolder = (RssHolder) view.getTag();

            }

            final RSSFeed_SelectedHotelResult rssFeed = rssFeedLst
                    .get(position);

            rssHolder.rssTitleView.setText(rssFeed.getName());
            imageLoader.DisplayImage(rssFeed.getHotel_image(),
                    rssHolder.rssImagHotel);
            imageLoader.DisplayImage_rating(rssFeed.getHote_rate_image(),
                    rssHolder.rssImageHotelRate);

            rssHolder.rssHotelPrice.setText(rssFeed.getHotel_price());

            rssHolder.rssHotelAddress.setText(rssFeed.getHotel_desc());
            rssHolder.rating_hotel.setRating(Float.valueOf(rssFeed
                    .getHotel_rate()));
            rssHolder.tv_currcode.setText(Consts.currencyCode);
            if (rssFeed.getoffer() != null) {
                rssHolder.tv_offer.setText("**" + rssFeed.getoffer() + "**");
            } else {
                rssHolder.tv_offer.setText("");
            }

            rssHolder.iv_add.setOnClickListener(new OnClickListener() {

                @Override
                public void onClick(View v) {
                    // TODO Auto-generated method stub
                    selectedPosition = position;
                    try {

                        if (position == selectedPosition) {

                            rssHolder.iv_add
                                    .setBackgroundResource(R.drawable.fill);

                        } else {

                            rssHolder.iv_add
                                    .setBackgroundResource(R.drawable.plus12);
                        }

                    } catch (IndexOutOfBoundsException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();

                    }
                    System.out
                            .println("::::::::::::My data in side hotel List activity:::::::::;"
                                    + position
                                    + ""
                                    + rssFeed.getName()
                                    + "\n"
                                    + rssFeed.getHotel_price());

                    /*
                     * RSSFeed_SelectedHotelResult rssFeed1 = rssFeedLst
                     * .get(position);
                     */

                }
            });

            return view;
        }
    }

Answer 1

对于通知数据集，更改了您调用错误方法的正确方法是adapter.notifyDataSetChanged()

Answer 2

1。）将此代码写入自定义适配器getView：

if (position == selectedPosition) {

            imageview.setBackgroundResource(R.drawable.image1);

        } else {

            imageview.setBackgroundResource(R.drawable.normal);
        } 

2.。）在自定义适配器中创建一个方法：

public void setSelected(int position) {
        selectedPosition = position;
    }

//where selectPosition is private int selectedPosition = -1;

3.。）从活动列表项中调用此方法，点击：

   ((Category_Adapter) adapter).setSelected(position);
            listview.invalidate();

1. 确保您的列表视图设置为单选模式。

Answer 3

private class RssAdapter extends ArrayAdapter<RSSFeed_SelectedHotelResult> {
        private List<RSSFeed_SelectedHotelResult> rssFeedLst;
       private int selectedPosition =-1;// initalize position

        public RssAdapter(Context context, int textViewResourceId,
                List<RSSFeed_SelectedHotelResult> rssFeedLst) {
            super(context, textViewResourceId, rssFeedLst);
            this.rssFeedLst = rssFeedLst;
            Boolean addtoShotlist;
        }
//make this method
public void setSelected(int position) {
        selectedPosition = position;
    }
        public View getView(final int position, View convertView,
                ViewGroup parent) {

            View view = convertView;

            if (convertView == null) {
                view = View.inflate(HotelListActivity.this, R.layout.list_row,
                        null);

                rssHolder = new RssHolder();
                rssHolder.iv_add = (ImageView) view.findViewById(R.id.iv_add);
                rssHolder.rssTitleView = (TextView) view
                        .findViewById(R.id.title);
                rssHolder.tv_offer = (TextView) view.findViewById(R.id.tv_ofr);
                rssHolder.rssImagHotel = (ImageView) view
                        .findViewById(R.id.hotelImage);
                rssHolder.rssImageHotelRate = (ImageView) view
                        .findViewById(R.id.rateHotel2);
                rssHolder.rssHotelPrice = (TextView) view
                        .findViewById(R.id.textHotelRate);
                rssHolder.rssHotelAddress = (TextView) view
                        .findViewById(R.id.textHotelDesc);
                // rssHolder.adres = (TextView) view.findViewById(R.id.adres);
                // rssHolder.rssHotelRating = (TextView)
                // view.findViewById(R.id.textHotelRating);
                rssHolder.rating_hotel = (RatingBar) view
                        .findViewById(R.id.rateHotelImage);
                rssHolder.tv_currcode = (TextView) view
                        .findViewById(R.id.tv_currcode);

                view.setTag(rssHolder);

            } else {
                rssHolder = (RssHolder) view.getTag();

            }

            final RSSFeed_SelectedHotelResult rssFeed = rssFeedLst
                    .get(position);

            rssHolder.rssTitleView.setText(rssFeed.getName());
            imageLoader.DisplayImage(rssFeed.getHotel_image(),
                    rssHolder.rssImagHotel);
            imageLoader.DisplayImage_rating(rssFeed.getHote_rate_image(),
                    rssHolder.rssImageHotelRate);

            rssHolder.rssHotelPrice.setText(rssFeed.getHotel_price());

            rssHolder.rssHotelAddress.setText(rssFeed.getHotel_desc());
            rssHolder.rating_hotel.setRating(Float.valueOf(rssFeed
                    .getHotel_rate()));
            rssHolder.tv_currcode.setText(Consts.currencyCode);
            if (rssFeed.getoffer() != null) {
                rssHolder.tv_offer.setText("**" + rssFeed.getoffer() + "**");
            } else {
                rssHolder.tv_offer.setText("");
            }

            rssHolder.iv_add.setOnClickListener(new OnClickListener() {

                @Override
                public void onClick(View v) {
                   //remove selectposition = position

                    try {

                        if (position == selectedPosition) {

                            rssHolder.iv_add
                                    .setBackgroundResource(R.drawable.fill);

                        } else {

                            rssHolder.iv_add
                                    .setBackgroundResource(R.drawable.plus12);
                        }

                    } catch (IndexOutOfBoundsException e) {
                        // TODO Auto-generated catch block
                        e.printStackTrace();

                    }
                    System.out
                            .println("::::::::::::My data in side hotel List activity:::::::::;"
                                    + position
                                    + ""
                                    + rssFeed.getName()
                                    + "\n"
                                    + rssFeed.getHotel_price());

                    /*
                     * RSSFeed_SelectedHotelResult rssFeed1 = rssFeedLst
                     * .get(position);
                     */

                }
            });

            return view;
        }
    }

最后从活动列表项中调用适配器选择的方法单击并设置位置。