android

Question

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 activity。 “数据”数组显示在卡上，我希望在打开其他 activity 时显示相应的数组“document_list”。下面是代码，但所有项目都得到显示。那么我该如何限制或约束呢？数据(id) == document_list(property_id).

卡片视图片段

 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 是新的 activity，它使用以下代码打开卡片视图。所以在点击 R.id.menu_document 时：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
            },
            
        ]
    },

Answer 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来源的数据相匹配。

private String selectedId = "";

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        if (getArguments() != null) {
            selectedId = getArguments().getString("selectedId");
        }
    }

然后在 DocFragment

中获取时匹配该 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) {

        }

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