android - 单击 recyclerview 项目时如何获取 sqlite 的 id？

Question

这是我的疑问，当我单击 recyclerview 项目时需要获取我保存在 sqlite 中的任务 ID 我该如何执行此操作，例如当我单击 recycler view 需要将该值传递到下一页并需要更新该值我怎么能到目前为止，我尝试过的是:

public class Task extends Fragment  {
    private static final String MY_PREFERENCE_KEY = "yogan";
    private List<Model_Task_List> model_task_lists;

    private RecyclerView recyclerView;
    Task_List_Adapter taskadapter;
    private RecyclerView.LayoutManager layoutManager;
    SharedPreferences sharedPreferences;
    private RecyclerView.Adapter adapter;
    RequestQueue yog;
    String user_id;
    AppController app;
    RequestQueue queue;
    String Url;
    Task_DB task_db = null;
    Database_SF_APP database_sf_app;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment_task, container, false);
        recyclerView = (RecyclerView) view.findViewById(R.id.my_recycler_view);
        LinearLayoutManager layoutManager = new LinearLayoutManager(getContext());
        layoutManager.setOrientation(LinearLayoutManager.VERTICAL);
        recyclerView.setItemAnimator(new DefaultItemAnimator());
        recyclerView.setLayoutManager(layoutManager);
        if (model_task_lists == null) {
            model_task_lists = new ArrayList<Model_Task_List>();
        }
        Calendar c = Calendar.getInstance();
        System.out.println("Current time => " + c.getTime());

        SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd");
        String formattedDate = df.format(c.getTime());
        int hour=c.get(Calendar.HOUR_OF_DAY);
        String hours=Integer.toString(hour);
        database_sf_app = new Database_SF_APP(getActivity().getBaseContext());
        int count=database_sf_app.getTaskCount();
        sharedPreferences = getActivity().getSharedPreferences(LoginActivity.login, 0);
        user_id = sharedPreferences.getString("user_id", null);
        model_task_lists=database_sf_app.getTaskListById(user_id);
        taskadapter=new Task_List_Adapter(model_task_lists,getActivity());
        recyclerView.setAdapter(taskadapter);
        if(taskadapter!=null){
            taskadapter.setOnItemClickListener(new Task_List_Adapter.data() {
                @Override
                public void yog(View v, int position) {


                }
            });
        }
        queue = Volley.newRequestQueue(getContext());
        Url = "http://xxx.xx.x.xx/xxx/GetActivitiesByUserID.svc/getlist/Task/" + user_id +"/" +null+"/"+hours;
        ConnectivityManager cn = (ConnectivityManager) getActivity().getSystemService(Context.CONNECTIVITY_SERVICE);
        NetworkInfo nf = cn.getActiveNetworkInfo();
        if (nf != null && nf.isConnected()) {
            Toast.makeText(getActivity(), "Network Available", Toast.LENGTH_LONG).show();
            JsonObjectRequest jsonObjRequest = new JsonObjectRequest(Request.Method.POST, Url, new JSONObject(),
                    new Response.Listener<JSONObject>() {

                        @Override
                        public void onResponse(JSONObject response) {
                            String server_response = response.toString();
                            try {
                                JSONObject json_object = new JSONObject(server_response);
                                JSONArray json_array = new JSONArray(json_object.getString("TaskResult"));
                                for (int i = 0; i < json_array.length(); i++) {
                                    Model_Task_List modelobj = new Model_Task_List();
                                    JSONObject json_arrayJSONObject = json_array.getJSONObject(i);
                                    modelobj.setSubject(json_arrayJSONObject.getString("Subject"));
                                    modelobj.setTaskID(json_arrayJSONObject.getInt("TaskID"));
                                    modelobj.setUserName(json_arrayJSONObject.getString("DueDate"));
                                    modelobj.setTaskStatus(json_arrayJSONObject.getString("TaskStatus"));
                                    modelobj.setUserid(json_arrayJSONObject.getString("Owner"));
                                    database_sf_app.insertorUpdate(modelobj);


                                }
                            } catch (JSONException e) {
                                e.printStackTrace();
                            }

                        }
                    },
                    new Response.ErrorListener() {
                        @Override
                        public void onErrorResponse(VolleyError error) {
                            Toast.makeText(getContext(), error.toString(), Toast.LENGTH_SHORT).show();

                        }
                    });

            //Creating request queue

            queue.add(jsonObjRequest);

        }

        //sync operation
        //a union b
        //a server
        //b local storage

        //a only - insert local
        //b only - send to server
        //a = b do nothing

        //result
        //bind


        return view;
    }


    @Override
    public void onResume()
    {
            super.onResume();
    }


    @Override
    public void onStop() {

        super.onStop();
    }

}

这是我的任务适配器:

import android.content.Context;
        import android.support.v7.widget.RecyclerView;
        import android.view.LayoutInflater;
        import android.view.View;
        import android.view.ViewGroup;
        import android.widget.ImageView;
        import android.widget.TextView;

        import java.util.List;

public class Task_List_Adapter extends RecyclerView.Adapter<Task_List_Adapter.MyViewHolder>  {
    private List<Model_Task_List> dataSet;
    private    Context context;

    private static data yog;

    Model_Task_List modelTaskList=new Model_Task_List();

    public void remove(int position)
    {
        dataSet.remove(position);
        notifyItemRemoved(position);
    }
    public void edit(int position){
        dataSet.set(position, modelTaskList);
        notifyItemChanged(position);
    }

    public void setOnItemClickListener(data listener) {
        this.yog = listener;
    }

    public static class MyViewHolder extends RecyclerView.ViewHolder  {
        // Model_Task_List Model_Task_List=new Model_Task_List();
        TextView textname;
        TextView textaddress;
        TextView textphnum;
        TextView textdegree;
        TextView textemail;
        ImageView call;
        data datas;

        public MyViewHolder(final View itemView) {
            super(itemView);
            this.textname = (TextView) itemView.findViewById(R.id.subject);
            this.textaddress = (TextView) itemView.findViewById(R.id.username);
            this.textphnum = (TextView) itemView.findViewById(R.id.status);


            itemView.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    if(yog!=null){
                        yog.yog(itemView,getLayoutPosition());
                    }
                }
            });

            // this.imageViewIcon = (ImageView) itemView.findViewById(R.id.imageView);

        }



    }
    public interface data
    {
        void yog(View v,int position);
    }
    public Task_List_Adapter(List<Model_Task_List> data,Context context) {

        this.dataSet = data;
        this.context=context;
    }

    @Override
    public MyViewHolder onCreateViewHolder(ViewGroup parent,
                                           int viewType) {
        View view = LayoutInflater.from(parent.getContext())
                .inflate(R.layout.task_list_view, parent, false);

        MyViewHolder myViewHolder = new MyViewHolder(view);
        return myViewHolder;
    }

    @Override
    public void onBindViewHolder(MyViewHolder holder, int position) {
        TextView textViewName = holder.textname;
        TextView textViewaddress = holder.textaddress;
        TextView textViewphnum = holder.textphnum;
        TextView textdegree = holder.textdegree;
        TextView textemail=holder.textemail;

        textViewName.setText("Subject:"+dataSet.get(position).getSubject());
        textViewaddress.setText("DueDate"+dataSet.get(position).getUserName());
        textViewphnum.setText("Status:"+dataSet.get(position).getTaskStatus());


    }




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

获取id的方式是否正确:

    taskadapter.setOnItemClickListener(new Task_List_Adapter.data() {
                @Override
                public void yog(View v, int position) {

Model_Task_List model_task_list=(Model_Task_List)model_task_lists.get(position);


                    String yog=model_task_list.getSubject().toString();
                   int yogeshs=model_task_list.getTaskID();
                    String yogan=Integer.toString(yogeshs);
                    Toast.makeText(getContext(),yogan,Toast.LENGTH_SHORT).show();
                }
            });
        }
Where i make recyclerview clickable how to get id of sqlite when i click and need to pass the value to next page 

Answer 1

您在 recyclerview 中显示的对象，

在你的情况下，代码必须在 TaskAdapter 中，

将 id 放入该对象中，这样当您单击它时，您将获得该对象，因此从该对象中检索 ID

clickedObjecj.getId();