Question

我以JSON的形式从服务器中获取了一系列数据，如下所示，然后将它们存储在列表中，然后它们与适配器一起显示在Recycler视图中。

[
{
    "cat_id": 593,
    "title": "آلرژی و ایمونولوژی",
    "image_add": "http://pezeshk-yab.com/upload/job_add",
    "image": "http://pezeshk-yab.com/upload/job_cat/Allergy.svg",
    "sub_cat": [
        {
            "cat_id": 594,
            "cat_title": "متخصص",
            "cat_parent_fk": 593
        },
        {
            "cat_id": 595,
            "cat_title": "فوق تخصص",
            "cat_parent_fk": 593
        }
    ]
},
{
    "cat_id": 15,
    "title": "ارتوپد",
    "image_add": "http://pezeshk-yab.com/upload/job_add",
    "image": "http://pezeshk-yab.com/upload/job_cat/Orthopedic.svg",
    "sub_cat": [
        {
            "cat_id": 506,
            "cat_title": "متخصص",
            "cat_parent_fk": 15
        },
        {
            "cat_id": 507,
            "cat_title": "فوق تخصص",
            "cat_parent_fk": 15
        }
    ]
}]

一切正常。现在，我想要显示一个对话框，方法是单击“回收站”中的任何项以仅显示这两个JSON部分：

"sub_cat": [
    {
        "cat_id": 594,
        "cat_title": "متخصص",
        "cat_parent_fk": 593
    },
    {
        "cat_id": 595,
        "cat_title": "فوق تخصص",
        "cat_parent_fk": 593
    }
]

为此，我在适配器中定义了对话框，问题是现在对话框{all sub_cat }中的所有部分都已显示。我的适配器的代码如下：

[![public class CatsAdapter extends RecyclerView.Adapter<CatsAdapter.ViewHolder> {
    private Context context;
    private List<Cats> list;

    CatsAdapter(Context context, List<Cats> list) {
        this.context = context;
        this.list = list;
    }

    @NonNull
    @Override
    public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(context).inflate(R.layout.cat_index, parent, false);
        return new ViewHolder(view);
    }

    @Override
    public void onBindViewHolder(ViewHolder holder, int position) {
        final Cats cats = list.get(position);
        holder.txt_title.setText(cats.getTitle());
        holder.cardView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {

                Dialog dialog = new Dialog((Activity) context);
                String id = cats.getCat_id();
                Log.i("l", "onClick: " +id );
                List<Cats> catsList = new ArrayList<>();
                dialog.setContentView(R.layout.custompopup);
                dialog.getWindow().setBackgroundDrawable(new ColorDrawable(Color.TRANSPARENT));
                RecyclerView recyclerView = (RecyclerView) dialog.findViewById(R.id.rec_dialog);
                DialogAdapter dialogAdapter = new DialogAdapter(context, list);
                recyclerView.setLayoutManager(new LinearLayoutManager(context));
                recyclerView.setAdapter(dialogAdapter);

                dialog.show();
            }
        });
        ImageRequest.create(holder.image).setTargetUrl(cats.getImage()).execute();


    }

    @Override
    public int getItemCount() {
        return list.size();
    }


    public class ViewHolder extends RecyclerView.ViewHolder {

        ImageView image;
        TextView txt_title;
        CardView cardView;

        public ViewHolder(View itemView) {
            super(itemView);
            image = (ImageView) itemView.findViewById(R.id.img_cat);
            txt_title = (TextView) itemView.findViewById(R.id.title_cat);
            cardView = (CardView) itemView.findViewById(R.id.card_view);
            txt_title.setSelected(true);
        }
    }
}]

解析JSON代码：

JsonArrayRequest jsonArrayRequest = new JsonArrayRequest(Request.Method.GET, url, null, new Response.Listener<JSONArray>() {
            @Override
            public void onResponse(JSONArray response) {
                for (int i = 0; i < response.length(); i++) {
                    try {
                        Cats cats = new Cats();
                        JSONObject jsonObject = (JSONObject) response.get(i);
                        String cat_id = jsonObject.getString("cat_id");
                        String title = jsonObject.getString("title");
                        String image_add = jsonObject.getString("image_add");
                        String image = jsonObject.getString("image");

                       JSONArray jsonArray = jsonObject.getJSONArray("sub_cat");

                        for (int j = 0; j < jsonArray.length(); j++) {
                            JSONObject object = jsonArray.getJSONObject(j);
                            String sub_cat_id = object.getString("cat_id");
                            String sub_cat_title = object.getString("cat_title");
                            String sub_parent_fk = object.getString("cat_parent_fk");
                            cats.setSub_cat_id(sub_cat_id);
                            cats.setCat_title(sub_cat_title);
                            cats.setCat_parent_fk(sub_parent_fk);
                        }


                        cats.setCat_id(cat_id);
                        cats.setTitle(title);
                        cats.setImage(image);
                        cats.setImage_add(image_add);
                        list.add(cats);
                        catsAdapter.notifyDataSetChanged();
                    } catch (JSONException e) {
                        e.printStackTrace();
                    }
                }

Answer 1

为什么要将整个列表传递给DialogAdapter？

DialogAdapter dialogAdapter = new DialogAdapter(context, list);

如果要在对话框中显示该类别的子sub_cat，则应从该类别中获取sub_cats并使用这些sub_cats创建一个适配器

这应该是您的类别类：

public class Category {

    private Integer catId;
    private String title;
    private String imageAdd;
    private String image;
    private List<SubCat> subCat = null;
    private Map<String, Object> additionalProperties = new HashMap<String, Object>();

    public Integer getCatId() {
        return catId;
    }

    public void setCatId(Integer catId) {
        this.catId = catId;
    }

    public String getTitle() {
        return title;
    }

    public void setTitle(String title) {
        this.title = title;
    }

    public String getImageAdd() {
        return imageAdd;
    }

    public void setImageAdd(String imageAdd) {
        this.imageAdd = imageAdd;
    }

    public String getImage() {
        return image;
    }

    public void setImage(String image) {
        this.image = image;
    }

    public List<SubCat> getSubCat() {
        return subCat;
    }

    public void setSubCat(List<SubCat> subCat) {
        this.subCat = subCat;
    }

    public Map<String, Object> getAdditionalProperties() {
        return this.additionalProperties;
    }

    public void setAdditionalProperty(String name, Object value) {
        this.additionalProperties.put(name, value);
    }

}

和subCategory类：

public class SubCat {

    private Integer catId;
    private String catTitle;
    private Integer catParentFk;
    private Map<String, Object> additionalProperties = new HashMap<String, Object>();

    public Integer getCatId() {
        return catId;
    }

    public void setCatId(Integer catId) {
        this.catId = catId;
    }

    public String getCatTitle() {
        return catTitle;
    }

    public void setCatTitle(String catTitle) {
        this.catTitle = catTitle;
    }

    public Integer getCatParentFk() {
        return catParentFk;
    }

    public void setCatParentFk(Integer catParentFk) {
        this.catParentFk = catParentFk;
    }

    public Map<String, Object> getAdditionalProperties() {
        return this.additionalProperties;
    }

    public void setAdditionalProperty(String name, Object value) {
        this.additionalProperties.put(name, value);
    }

}

，并在您的代码中执行此操作：

JsonArrayRequest jsonArrayRequest = new JsonArrayRequest(Request.Method.GET, url, null, new Response.Listener<JSONArray>() {
        @Override
        public void onResponse(JSONArray response) {
            for (int i = 0; i < response.length(); i++) {
                try {
                    Category category = new Category();
                    JSONObject jsonObject = (JSONObject) response.get(i);
                    category.setCatId(jsonObject.getString("cat_id"));
                    category.setTitle(jsonObject.getString("title"));
                    category.setImageAdd(jsonObject.getString("image_add"));
                    category.setImage(jsonObject.getString("image"));

                    JSONArray jsonArray = jsonObject.getJSONArray("sub_cat");
                    category.setSubCat(new ArrayList<>());
                    for (int j = 0; j < jsonArray.length(); j++) {
                        JSONObject object = jsonArray.getJSONObject(j);
                        SubCat subCat = new SubCat();

                        subCat.setCatId(object.getString("cat_id"));
                        subCat.setCatTitle(object.getString("cat_title"));
                        subCat.setCatParentFk(object.getString("cat_parent_fk"));

                        category.getSubCat().add(subCat);
                    }

                    list.add(category);
                } catch (JSONException e) {
                    e.printStackTrace();
                }
            }
            catsAdapter.notifyDataSetChanged();
        }

然后，当您需要该类别的子类别时，您可以执行以下操作：

Category cat=list.get(position);
ArrayList<SubCat> subCategories=cat.getSubCat();

显示来自JSON的部分数据的困难

1 个答案: