Question

json data sample我正在从json加载标签名称，当我尝试获取每个标签的数据时，我只得到关于最后一只兔子的数据这是代码

final TabLayout tabLayout = (TabLayout) view.findViewById(R.id.tabLayout);
    final RequestQueue catRequestQueue = Volley.newRequestQueue(getActivity());
    JsonArrayRequest catJsonArrayRequest = new JsonArrayRequest(Request.Method.GET, Utils.BASE_URL + "getCats"
            , null, new Response.Listener<JSONArray>() {
        @Override
        public void onResponse(JSONArray response) {
            for (int i = 0; i < response.length(); i++) {
                CategoryModel categoryModel = new CategoryModel();
                try {
                    JSONObject jsonObject = response.getJSONObject(i);
                    categoryModel.setName(jsonObject.getString("name"));
                    categoryModel.setId(jsonObject.getString("id"));
                    tabLayout.addTab(tabLayout.newTab().setText(categoryModel.getName()), false);
                } catch (JSONException e) {
                    e.printStackTrace();
                }
                catId = categoryModel.getId();
            }
        }
    }, new Response.ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError error) {

        }
    });
    catRequestQueue.add(catJsonArrayRequest);

CategoryModel类

公共类CategoryModel实现Serializable {

private String id;
private String name;
private String parent;
private String photo;

public String getId() {
    return id;
}

public void setId(String id) {
    this.id = id;
}

public String getName() {
    return name;
}

public void setName(String name) {
    this.name = name;
}

public String getParent() {
    return parent;
}

public void setParent(String parent) {
    this.parent = parent;
}

public String getPhoto() {
    return photo;
}

public void setPhoto(String photo) {
    this.photo = photo;
}

}

修改

categoryModelArrayList = new ArrayList<>();
    final TabLayout tabLayout = (TabLayout) view.findViewById(R.id.tabLayout);
    final RequestQueue catRequestQueue = Volley.newRequestQueue(getActivity());
    JsonArrayRequest catJsonArrayRequest = new JsonArrayRequest(Request.Method.GET, Utils.BASE_URL + "getCats"
            , null, new Response.Listener<JSONArray>() {
        @Override
        public void onResponse(JSONArray response) {
            for (int i = 0; i < response.length(); i++) {
                CategoryModel categoryModel = new CategoryModel();
                try {
                    JSONObject jsonObject = response.getJSONObject(i);
                    categoryModel.setName(jsonObject.getString("name"));
                    categoryModel.setId(jsonObject.getString("id"));
                    categoryModelArrayList.add(categoryModel);
                    tabLayout.addTab(tabLayout.newTab().setText(categoryModel.getName()), false);
                } catch (JSONException e) {
                    e.printStackTrace();
                }
            }
        }
    }, new Response.ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError error) {

        }
    });
    catRequestQueue.add(catJsonArrayRequest);

Answer 1

可能存在异常，为什么尝试解析JSON，阻止添加标签。

此外正如@Mike M.所说，你有catId = categoryModel.getId(); INSIDE the loop，因此，只保留最后一个实例。

如果您需要所有ID，请使用列表，出于调试目的，我建议您删除try-catch语法，以确保循环完全执行而不会引发异常，或澄清您的问题说没有例外。

当我尝试获取每个点击的ID时，我只得到最后一个标签的ID

1 个答案: