android - 为每个卡片视图获取有限的 json 数组
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【中文标题】android - 为每个卡片视图获取有限的 json 数组【英文标题】：android - fetching limited json array for each cardview 【发布时间】：2021-07-04 11:29:15 【问题描述】：我正在使用cardview，每张卡片都有一个弹出菜单，可以打开另一个活动。 “data”数组显示在卡片上，我希望在打开其他活动时显示相应的数组“document_list”。下面是代码，但所有项目都显示出来了。那么如何限制或限制？ data(id) == document_list(property_id)。
卡片浏览片段
StringRequest stringRequest = new StringRequest(Request.Method.POST,"URL",
new Response.Listener<String>()
@Override
public void onResponse(String response)
try
//converting the string to json array object
JSONObject object = new JSONObject(response);
if (object.getInt("status") == 200)
JSONArray jsonArray = object.getJSONArray("data");
// String userData = jsonArray.getString(0);
for (int i = 0; i < jsonArray.length(); i++)
JSONObject pobj = jsonArray.getJSONObject(i);
pobj.getString("id");
JSONObject pobj1 = new JSONObject(pobj.getString("owner_details"));
mylistList.add(new Mylist(
//other elements
pobj.getString("sas_application_no"),
pobj1.getString("name"),
pobj1.getString("mobile")
));
CARDVIEW 适配器
holder.buttonViewOption.setOnClickListener(new View.OnClickListener()
@Override
public void onClick(View view)
PopupMenu popup = new PopupMenu(mCtx, holder.buttonViewOption);
popup.inflate(R.menu.options_menu);
popup.setOnMenuItemClickListener(new PopupMenu.OnMenuItemClickListener()
@Override
public boolean onMenuItemClick(MenuItem item)
switch (item.getItemId())
case R.id.menu_document:
//handle menu2 click
id = mylist.getId();
Bundle bundle = new Bundle();
bundle.putString("id",id);
DocFragment newfragment1 = new DocFragment();
FragmentTransaction fragmentTransaction1 =((AppCompatActivity)mCtx).getSupportFragmentManager().beginTransaction();
fragmentTransaction1.replace(R.id.container_view1, newfragment1);
fragmentTransaction1.addToBackStack(null);
fragmentTransaction1.commit();
NavigationActivity.container_view1.setVisibility(View.VISIBLE);
break;
return false;
);
Doc_fragment 是使用以下代码打开卡片视图的新活动。所以点击 R.id.menu_document: 我需要传递从 CARDVIEW FRAGMENT 中获取的“id”？我该怎么做？
public class DocFragment extends Fragment
//a list to store all the products
List<DocList> docList;
DocAdapter docAdapter;
//the recyclerview
RecyclerView recyclerView;
private String sid = "";
public View onCreateView(@NonNull LayoutInflater inflater,
ViewGroup container, Bundle savedInstanceState)
View root = inflater.inflate(R.layout.fragment_doc, container, false);
if (getArguments() != null)
sid = getArguments().getString("id");
Toast.makeText(getActivity(), sid, Toast.LENGTH_LONG).show();
docList = new ArrayList<>();
recyclerView = (RecyclerView) root.findViewById(R.id.recyclerView1);
recyclerView.setHasFixedSize(true);
recyclerView.setLayoutManager(new LinearLayoutManager(getContext()));
//docList.add(new DocList("abc","123","asdf"));
//creating recyclerview adapter
docAdapter = new DocAdapter(getContext(), docList);
recyclerView.setAdapter(docAdapter);
loadMenuData();
return root;
public void loadMenuData()
StringRequest stringRequest = new StringRequest(Request.Method.POST, "url",
new Response.Listener<String>()
@Override
public void onResponse(String response)
try
//converting the string to json array object
//String selectedId = getIntent().getStringExtra("selectedId");
JSONObject object = new JSONObject(response);
if (object.getInt("status") == 200)
JSONArray jsonArray = object.getJSONArray("data");
for (int i = 0; i < jsonArray.length(); i++)
JSONObject pobj = jsonArray.getJSONObject(i);
if (!sid.equals(pobj.optString("id", "")))
continue;
JSONArray jsonArray1 = pobj.getJSONArray("document_list");
for (int j = 0; j < jsonArray1.length(); j++)
JSONObject dobj = jsonArray1.getJSONObject(j);
docList.add(new DocList(
dobj.getString("document_name"),
dobj.getString("description"),
dobj.getString("doc_no")
));
//creating adapter object and setting it to recyclerview
docAdapter = new DocAdapter(getContext(), docList);
recyclerView.setAdapter(docAdapter);
catch (JSONException e)
e.printStackTrace();
,
new Response.ErrorListener()
@Override
public void onErrorResponse(VolleyError error)
);
//adding our stringrequest to queue
Volley.newRequestQueue(getContext()).add(stringRequest);
"status": 200,
"data": [
"id": "5",
"property_type": "AGRICULTURAL",
"name": "A D ",
"site_no": "SY NO 21",
"p_id_no": "21",
"sas_application_no": "13",
"latitude": "12",
"longitude": "33",
"status": "OWNED",
"purchase_year": "2007",
"owner_details":
"name": "A D",
"mobile": "776006"
,
"size": "41724",
"unit": "SQF",
"document_list": [
"property_id": "5",
"document_type_id": "4",
"file_path": "https://demoapi.dyuppar.in/uploads",
"document_name": "Encumbrance Certificate",
"description": null,
"doc_no": null
,
"property_id": "5",
"document_type_id": "3",
"file_path": "https://demoapi.dyuppar.in/uploads",
"document_name": "Mother Deed",
"description": null,
"doc_no": null
,
"property_id": "5",
"document_type_id": "84",
"file_path": "https://demoapi.dyuppar.in/uploads",
"document_name": "MUTATION COPY ",
"description": null,
"doc_no": null
,
"property_id": "5",
"document_type_id": "87",
"file_path": "https://demoapi.dyuppar.in/uploads",
"document_name": "OLD E C",
"description": null,
"doc_no": null
,
"property_id": "5",
"document_type_id": "83",
"file_path": "https://demoapi.dyuppar.in/uploads",
"document_name": "OTHER DOCUMENTS ",
"description": null,
"doc_no": null
,
]
,
"id": "9",
"property_type": "AGRICULTURAL",
"name": "A D ",
"site_no": "SY NO 19/1 ",
"p_id_no": "19/1",
"sas_application_no": "12",
"latitude": "12",
"longitude": "45",
"status": "OWNED",
"purchase_year": "2007",
"owner_details":
"name": "A D ",
"mobile": "7760906"
,
"size": "2",
"unit": "ACR",
"document_list": [
"property_id": "9",
"document_type_id": "4",
"file_path": "https://demoapi.dyuppar.in/uploads",
"document_name": "Encumbrance Certificate",
"description": null,
"doc_no": null
,
"property_id": "9",
"document_type_id": "43",
"file_path": "https://demoapi.dyuppar.in/uploads",
"document_name": "GPA",
"description": null,
"doc_no": null
,
]
,
【问题讨论】：
您通过什么意图调用该活动？你在其他活动中的收获如何？你能请一些代码和例子吗？ @Mayur Gajra - 我没有通过意图传递任何东西。在这两个活动中，我都传递了相同的 URL。（cardview 工作正常） 【参考方案1】：你可以这样做：
在您的 CardViewFragment 中设置选择卡片时的参数，如下所示：
switch (item.getItemId())
case R.id.menu_document:
//handle menu2 click
Bundle bundle = new Bundle();
bundle.putString("selectedId",selectedId);//get this id from your object/model .e.g list.get(postion).getId() , do it as per your strcuture setup.
DocFragment newfragment1 = new DocFragment();
newfragment1.setArguments(bundle);
FragmentTransaction fragmentTransaction1 =((AppCompatActivity)mCtx).getSupportFragmentManager().beginTransaction();
fragmentTransaction1.replace(R.id.container_view1, newfragment1);
fragmentTransaction1.addToBackStack(null);
fragmentTransaction1.commit();
NavigationActivity.container_view1.setVisibility(View.VISIBLE);
break;
在您的DocFragment 中创建一个全局变量并将其与来自您的源的数据相匹配。
private String selectedId = "";
@Override
public void onCreate(Bundle savedInstanceState)
super.onCreate(savedInstanceState);
if (getArguments() != null)
selectedId = getArguments().getString("selectedId");
然后在获取DocFragment时匹配该id
try
//converting the string to json array object
JSONObject object = new JSONObject(response);
if (object.getInt("status") == 200)
JSONArray jsonArray = object.getJSONArray("data");
for (int i = 0; i < jsonArray.length(); i++)
JSONObject pobj = jsonArray.getJSONObject(i);
// compare id passed from main activity, which was selected by user
if (!selectedId.equals(pobj.optString("id", "")))
continue;
JSONArray jsonArray1 = pobj.getJSONArray("document_list");
for (int j = 0; j < jsonArray1.length(); j++)
JSONObject dobj = jsonArray1.getJSONObject(j);
docList.add(new DocList(
dobj.getString("document_name"),
dobj.getString("description"),
dobj.getString("doc_no")
));
catch (Exception e)
【讨论】：
好的，但是我有一个 cardview 片段和 cardview 适配器（在这个适配器中我有一个弹出菜单）所以通过弹出菜单我调用新片段（所以 id shd 在这里传递但意图不起作用） @AparnaMutnalkar 您能否在您如何调用片段的问题中更新您的代码？以及您在其他片段中收到的内容？ @AparnaMutnalkar 查看更新的答案，如果有帮助，请告诉我。 我更新了谢谢你但是 if (getArguments() != null) selectedId = getArguments().getString("selectedId"); 为空白。我尝试在 toast 中显示 你检查过你传入的bundle.putString("selectedId",selectedId); 不为空吗？如果没有，请使用您尝试过的内容更新您的最新代码。以上是关于android - 为每个卡片视图获取有限的 json 数组的主要内容，如果未能解决你的问题，请参考以下文章