Android - 添加视图到图像不会更新 - onClick

Question

摘要

当用户点击该RecyclerView项目时,我想根据存储在BaaS [Sashido](X坐标,Y坐标和标记名称)中的信息为该图像添加标签.但是,我遇到的问题是没有得到这个位置.单击图像时创建一个Toast,它显示与视图本身对应的正确位置.(开头为零,依此类推)

但是,一旦用户点击列表中的另一个项目,如何更新位置,以便与Sashido中数组中的位置对应的标记与该位置匹配RecyclerView,因为此时Sashido类中的第一行是用该行的标签填充所有图像.

我的假设是将位置传递给getTagInformation()方法使用,getLayoutPosition()这样当objects.get(position)调用数组时,它将为Sashido类获得相同的位置,但事实并非如此.我觉得在用户点击新项目后,必须不能正确更新适配器.

onBindViewHolder:

@Override
public void onBindViewHolder(RecyclerViewHolderPreviousPosts holder, int position) {
    holder.bind(previousPostsList.get(position), listener);
}

onBind:

void bind(final PreviousPostsDataModel model, final OnItemClickListener listener) { ...

uploadedImage.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                        if (count == 0) {
                            imageid = model.getImageId();
                            Toast.makeText(App.getContext(), "Image ID: " + imageid, Toast.LENGTH_SHORT).show();
                            Toast.makeText(App.getContext(), "Position: " + getAdapterPosition(), Toast.LENGTH_SHORT).show();
                            getTagInformation(getLayoutPosition());
                        } else {
                            Log.e("qwert", "" + imageid);
                            imageContainer.removeAllViews();
                            imageContainer.addView(uploadedImage);
                            count = 0;
                        }
                }
            });
... }

getTagInformation:

private void getTagInformation(final int position) {
                ParseQuery<ParseObject> query = ParseQuery.getQuery("FashionFeed");
                query.findInBackground(new FindCallback<ParseObject>() {
                    @Override
                    public void done(List<ParseObject> objects, ParseException e) {
                        if (e == null) {
                            Toast.makeText(context, "" + position, Toast.LENGTH_SHORT).show();
                            JSONArray tagNamesArray = objects.get(position).getJSONArray("tagName");
                            JSONArray posXArray = objects.get(position).getJSONArray("tagPointX");
                            JSONArray posYArray = objects.get(position).getJSONArray("tagPointY");

                            for (int i = 0; i < tagNamesArray.length(); i++) {
                                for (int t = 0; t < tagNamesArray.length(); t++) {
                                    tagNames.add(tagNamesArray.optString(t));
                                    tagXPositions.add(posXArray.optString(t));
                                    tagYPositions.add(posYArray.optString(t));

                                }

                                for (int o = 0; o < tagNamesArray.length(); o++) {
                                    tag = new TextView(App.getContext());
                                    tag.setX(Float.parseFloat(tagXPositions.get(o)));
                                    tag.setY(Float.parseFloat(tagYPositions.get(o)));
                                    tag.setText(tagNames.get(o));
                                    tag.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT));
                                    tag.setMaxLines(1);
                                    tag.setTextSize(11);
                                    tag.setClickable(true);
                                    tag.setHintTextColor(Color.WHITE);
                                    tag.setTextColor(Color.WHITE);
                                    tag.setBackgroundResource(R.drawable.tags_rounded_corners);
                                    imageContainer.addView(tag);
                                    count = 1;
                                }
                            }
                        } else {
                            Toast.makeText(context, "" + e.getMessage(), Toast.LENGTH_LONG).show();
                        }
                    }
                });
        }

我也试过了

public void getTagInformation(String imageid) {
ParseQuery query = ParseQuery.getQuery("FashionFeed");
query.WhereEqualTo("objectId", imageId);
....
}

与imageId传递到方法,并与我也手动输入objectId,将匹配,它仍然只生产属于该标签objectId.它似乎并不是这个查询通过所有对象.只需从该对象获取标签信息,然后使用这些标签设置所有图像.

如果您需要我提供更多代码,我非常乐意.

Answer 1

解决了问题。并不是说位置错误，而是因为由于 Parse 的FindInBackground()回调，我在填充图像列表之前试图找到标签，但填充得太晚了。

解决方案是我得到了JSONArray包含填充原始图像列表的原始查询中的标签名称、x 坐标和 y 坐标的 。所以它们会同时执行，然后我将JSONArray值传递到model，然后将其传递给bind()中的函数Adapter。

之前的问题是适配器将所有标签绑定到每个图像上，因此当图像上发生单击事件时，它只会将标签添加到imageContainer当前选定的（当前位置），而不是任何特定视图在任何特定的位置。

这使得每次单击图像时，它总是找到数据库中的第一个对象并将其分配给所选图像。[由于点击事件触发了该getTagInformation()功能）。通过函数getTagInformation内方法的自动化，我能够使用正确的标签填充每个图像，并使用分配给图像的 来进一步操作它，如下所示：BindViewHolderonClickListener

RecyclerView 持有者：

public class RecyclerViewHolderPreviousPosts extends RecyclerView.ViewHolder implements View.OnClickListener {
        // View holder for gridview recycler view as we used in listview
        public TextView createdAt;
        public ImageView uploadedImage;
        public TextView caption;
        TextView number_of_likes;
        TextView number_of_comments;
        TextView number_of_tags;
        public ImageView comments;
        public RelativeLayout imageContainer;


    RecyclerViewHolderPreviousPosts(View view) {
        super(view);
        // Find all views ids
        this.createdAt = (TextView) view
                .findViewById(R.id.created_date);
        this.uploadedImage = (ImageView) view
                .findViewById(R.id.image);
        this.caption = (TextView) view
                .findViewById(R.id.caption_post);
        this.number_of_likes = (TextView) view
                .findViewById(R.id.number_of_likes);
        this.number_of_comments = (TextView) view
                .findViewById(R.id.number_of_comments);
        this.number_of_tags = (TextView) view
                .findViewById(R.id.number_of_tags);
        this.comments = (ImageView) view
                .findViewById(R.id.comments_image);
        this.imageContainer = (RelativeLayout) view
                .findViewById(R.id.image_container);
        view.setOnClickListener(this);
    }

    void bind(PreviousPostsDataModel model1, final int position) { ....
        model = previousPostsList.get(position);
        getTagInformation();
....}

    private void getTagInformation() {
        for (int o = 0; o < model.getTagSize(); o++) {
            tag = new TextView(App.getContext());
            tag.setX(Float.parseFloat(model.getXpoints(o)));
            tag.setY(Float.parseFloat(model.getYpoints(o)));
            Log.e("x", "" + tag.getX());
            Log.e("y", "" + tag.getY());
            tag.setText(model.getTagName(o));
            tag.setLayoutParams(new ViewGroup.LayoutParams(ViewGroup.LayoutParams.WRAP_CONTENT, ViewGroup.LayoutParams.WRAP_CONTENT));
            tag.setMaxLines(1);
            tag.setTextSize(11);
            tag.setClickable(true);
            tag.setHintTextColor(Color.WHITE);
            tag.setTextColor(Color.WHITE);
            tag.setBackgroundResource(R.drawable.tags_rounded_corners);
            imageContainer.addView(tag);
            tags.add(tag);
        }
    }

    @Override
    public void onClick(View v) {
        if (count == 0) {
            for (int i = 0; i < tags.size(); i++) {
                tags.get(i).setVisibility(View.INVISIBLE);
            }
            count = 1;
        }
        else {
            for (int j = 0; j < tags.size(); j++) {
                tags.get(j).setVisibility(View.VISIBLE);
            }
            count = 0;
        }
    }
}

配置文件片段[原始查询]：

private void populateSelectedUserRecyclerView(String objectid) {
        ParseQuery<ParseObject> query = ParseQuery.getQuery("FashionFeed");
        query.whereEqualTo("uploader", ParseObject.createWithoutData("_User", objectid));
        query.orderByDescending("createdAt");
        Log.e("get order", "ordered");
        query.findInBackground(new FindCallback<ParseObject>() {
            @Override
            public void done(List<ParseObject> objects, ParseException e) {
                Log.e("gets done", "gets into done");
                if(e == null) {
                    if (objects.size() > 0) {
                        Log.e("does it get here", "it got here");

                        latestPostList = new ArrayList<>();
                        for (ParseObject j : objects) {
                            JSONArray tagNamesArray = j.getJSONArray("tagName");
                            JSONArray posXArray = j.getJSONArray("tagPointX");
                            JSONArray posYArray = j.getJSONArray("tagPointY");
                            latestPostList.add(new PreviousPostsDataModel(tagNamesArray, posXArray, posYArray));
                        }
                    }
                    else {
                        no_follow_display.setVisibility(View.VISIBLE);
                        no_follow_display.setText(R.string.no_posts);
                        no_follow_display.bringToFront();
                        recyclerView.setVisibility(View.GONE);
                    }

                    adapter = new RecyclerViewAdapterPreviousPosts(getActivity(), latestPostList, listener);
                    recyclerView.setAdapter(adapter);// set adapter on recyclerview

                    adapter.notifyDataSetChanged();
                }
                else {
                    Log.e("failed", "failed" + e.getMessage());
                }
            }
        });
    }

感谢您的帮助。