Question

在我的情况下，我有一个列表视图，点击一个项目就会出现一个imageview。但如果我向下或向上滚动，图像视图将消失。我怎样才能拯救＆＃34;观点的状态？感谢

- 编辑 - 这是我的适配器：

public class FeedListAdapterTab2 extends BaseAdapter {
        private Activity activity;
        private LayoutInflater inflater;
        private List<FeedItemAbos> feedItems;
        com.android.volley.toolbox.ImageLoader imageLoader = AppController.getInstance().getImageLoader();
        View.OnClickListener onClickListener;

        JSONParser jsonParser = new JSONParser();
        FeedItemAbos item;
        private long timestampLastClick;
        private long doubleClickQualificationSpanInMillis;
        private static final long DEFAULT_QUALIFICATION_SPAN = 200;
        String quotesID;

        TextView textViewQuotations;

        //UNIVERSAL
        private DisplayImageOptions options, optionsFeedImage;
        private ImageLoadingListener animateFirstListener = new AnimateFirstDisplayListener();

        public FeedListAdapterTab2(Activity activity, List<FeedItemAbos> feedItems, View.OnClickListener onClickListener) {
            this.activity = activity;
            this.feedItems = feedItems;
            this.onClickListener = onClickListener;

            //UNIVERSAL
            options = new DisplayImageOptions.Builder()
                    .showImageOnLoading(R.drawable.ic_stub)
                    .showImageForEmptyUri(R.drawable.ic_empty)
                    .showImageOnFail(R.drawable.ic_error)
                    .cacheInMemory(true)
                    .cacheOnDisk(true)
                    .displayer(new CircleBitmapDisplayer(Color.WHITE, 5))
                    .build();
            //UNIVERSAL
            optionsFeedImage = new DisplayImageOptions.Builder()
                    .cacheInMemory(true)
                    .cacheOnDisk(true)
                    .build();
        }

        @Override
        public int getCount() {
            return feedItems.size();
        }

        @Override
        public Object getItem(int location) {
            return feedItems.get(location);
        }

        @Override
        public long getItemId(int position) {
            return position;
        }

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


            if (inflater == null)
                inflater = (LayoutInflater) activity
                        .getSystemService(Context.LAYOUT_INFLATER_SERVICE);
            if (convertView == null)
                convertView = inflater.inflate(R.layout.feed_item, null);

            if (imageLoader == null)
                imageLoader = AppController.getInstance().getImageLoader();


            final ImageView imageViewLike = (ImageView) convertView.
                    findViewById(R.id.imageViewLike);

            try {

                item = feedItems.get(position);


                    convertView.setOnClickListener(new View.OnClickListener() {
                        @Override
                        public void onClick(View v) {

                            if ((SystemClock.elapsedRealtime() - timestampLastClick) < doubleClickQualificationSpanInMillis) {
                                Log.e("DOUBLE", "CLICK");
                                timestampLastClick = 0;
                                ID = String.valueOf(v.getId());
                            timestampLastClick = SystemClock.elapsedRealtime();
//

                imageViewLike.setVisibility(View.VISIBLE);
                            Log.e("id", "nice " + v.getId());
                        }
                    });
                }



            return convertView;
        }

在＆＃34;双击＆＃34;在转换视图上，所以列表视图的视图出现了一个imageview。但是如果视图没有再次显示，则imageview会消失。

Answer 1

列表适配器（ListAdapter或子类）应保持每个项目的状态。表示项目的视图在不再可见时会被销毁或回收。当项目再次可见时，将再次调用ListAdapter.getView()。

ListView破坏了我的更改

1 个答案: