RecyclerViewの各項目の値を変更する方法

Question

RecyclerViewには2つの項目があります。私は各項目内のTextViewの値を別々に変更できるようにしたいと思います。例えば

：

Tomato Soup Chicken Lamb 

Chicken Soup Fruit  Carrot 

現在、各アイテムは同じ値を有しています。

（私はOkHttpを使用していますし、いくつかJSONがthis linkでのWebページから値を取得するために解析する）

MainActivity.java

package me.anshsehgal.foodplanner; 

import android.support.v7.app.AppCompatActivity; 
import android.os.Bundle; 
import android.support.v7.widget.LinearLayoutManager; 
import android.support.v7.widget.RecyclerView; 

import java.util.ArrayList; 

public class MainActivity extends AppCompatActivity { 

    ArrayList<Menu> menus; 
    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 

     RecyclerView menuRecyclerView = (RecyclerView) findViewById(R.id.menuRecyclerView); 

     // Initialize contacts 
     menus = Menu.createContactsList(2); 
     // Create adapter passing in the sample user data 
     DaysAdapter adapter = new DaysAdapter(this, menus); 
     // Attach the adapter to the recyclerview to populate items 
     menuRecyclerView.setAdapter(adapter); 
     // Set layout manager to position the items 
     menuRecyclerView.setLayoutManager(new LinearLayoutManager(this)); 
     // That's all! 
    } 
} 

DaysAdapter.java（recyclerviewのための私のアダプタ）

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.TextView; 

import java.io.IOException; 
import java.util.List; 
import java.util.concurrent.ExecutionException; 

public class DaysAdapter extends 
     RecyclerView.Adapter<DaysAdapter.ViewHolder> { 

    public static class ViewHolder extends RecyclerView.ViewHolder{ 

     public TextView daysMenu; 
     public TextView soupMenu; 
     public TextView nonVegMainMenu; 

     public ViewHolder(View itemView){ 

      super(itemView); 

      daysMenu = (TextView)itemView.findViewById(R.id.dayMenu); 
      soupMenu = (TextView)itemView.findViewById(R.id.soupMenu); 
      nonVegMainMenu = (TextView)itemView.findViewById(R.id.nonVegMainMenu); 
     } 
    } 

    // Store a member variable for the contacts 
    private List<Menu> mMenuItems; 

    // Store the context for easy access 
    private Context mContext; 

    // Pass in the contact array into the constructor 
    public DaysAdapter(Context context, List<Menu> menus) { 
     mMenuItems = menus; 
     mContext = context; 
    } 

    // Easy access to the context object in the recyclerview 
    private Context getContext() { 
     return mContext; 
    } 


    @Override 
    public DaysAdapter.ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) { 
     Context context = parent.getContext(); 
     LayoutInflater inflater = LayoutInflater.from(context); 

     // Inflate the custom layout 
     View menutItemView = inflater.inflate(R.layout.days, parent, false); 

     // Return a new holder instance 
     ViewHolder viewHolder = new ViewHolder(menutItemView); 
     return viewHolder; 
    } 

    @Override 
    public void onBindViewHolder(DaysAdapter.ViewHolder viewHolder, int position) { 
     Menu menuItem = mMenuItems.get(position); 
     Menu.OkHttpHandler handler = new Menu.OkHttpHandler(); 
     TextView dayText = viewHolder.daysMenu; 

     try{ 
      //changing value here 
      String result = handler.execute("http://asehgal17.netau.net/json_get_data.php").get(); 
      dayText.setText(handler.getJsonDay()); 

      TextView soupText = viewHolder.soupMenu; 
      soupText.setText(handler.getJsonSoup()); 

      TextView nonVegMainText = viewHolder.nonVegMainMenu; 
      nonVegMainText.setText(handler.getJsonNonVegMain()); 
     }catch (ExecutionException e){ 
      e.printStackTrace(); 
     }catch (InterruptedException e){ 
      e.printStackTrace(); 
     } 



    } 

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

Menu.java（データが格納されるクラス）

import android.os.AsyncTask; 

import org.json.JSONArray; 
import org.json.JSONException; 
import org.json.JSONObject; 

import java.io.IOException; 
import java.util.ArrayList; 

import okhttp3.OkHttpClient; 
import okhttp3.Request; 
import okhttp3.Response; 

public class Menu { 
    private int mId; 
    private String mDay; 
    private String mSoup; 
    private String mNonVegMain; 
    private String mNonVegSide; 
    private String mVegMain; 
    private String mVegSide; 

    public Menu(int id, String day, String soup, String nonVegMain, String nonVegSide, String vegMain, String vegSide) { 
     mId = id; 
     mDay = day; 
     mSoup = soup; 
     mNonVegMain = nonVegMain; 
     mNonVegSide = nonVegSide; 
     mVegMain = vegMain; 
     mVegSide = vegSide; 
    } 

    public String getmDay() { 
     return mDay; 
    } 

    public int getmId() { 
     return mId; 
    } 

    public String getmNonVegMain() { 
     return mNonVegMain; 
    } 

    public String getmNonVegSide() { 
     return mNonVegSide; 
    } 

    public String getmSoup() { 
     return mSoup; 
    } 

    public String getmVegMain() { 
     return mVegMain; 
    } 

    public String getmVegSide() { 
     return mVegSide; 
    } 


    //getting JSON response in this class 
    public static class OkHttpHandler extends AsyncTask<String, Void, String> { 
     String jsonDay; 
     String jsonSoup; 
     String jsonNonVegMain; 
     String jsonNonVegSide; 
     String jsonVegMain; 
     String jsonVegSide; 
     OkHttpClient client = new OkHttpClient(); 



     @Override 
     protected String doInBackground(String... params) { 

      Request.Builder builder = new Request.Builder(); 
      builder.url(params[0]); 

      Request request = builder.build(); 

      try { 

       Response response = client.newCall(request).execute(); 
       String jsonString = response.body().string() ; 
       //parsing JSON 
       JSONObject json = new JSONObject(jsonString); 
       JSONArray parentArray = json.getJSONArray("server_response"); 
       JSONObject mondayMenu = parentArray.getJSONObject(1); 
       String day = mondayMenu.getString("day"); 
       String soup = mondayMenu.getString("soup"); 
       String nonVegMain = mondayMenu.getString("non_veg_main"); 
       String nonVegSide = mondayMenu.getString("non_veg_side"); 
       String vegMain = mondayMenu.getString("veg_main"); 
       String vegSide = mondayMenu.getString("veg_side"); 
       jsonDay = day; 
       jsonSoup = soup; 
       jsonNonVegMain = nonVegMain; 
       jsonNonVegSide = nonVegSide; 
       jsonVegMain = vegMain; 
       jsonVegSide = vegSide; 




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

      return null; 
     } 
     public String getJsonDay() { 
      return jsonDay; 
     } 

     public String getJsonNonVegMain() { 
      return jsonNonVegMain; 
     } 

     public String getJsonNonVegSide() { 
      return jsonNonVegSide; 
     } 

     public String getJsonSoup() { 
      return jsonSoup; 
     } 

     public String getJsonVegMain() { 
      return jsonVegMain; 
     } 

     public String getJsonVegSide() { 
      return jsonVegSide; 
     } 
    } 
    public static ArrayList<Menu> createContactsList(int numContacts) { 
     OkHttpHandler handler = new OkHttpHandler(); 
     ArrayList<Menu> menuItems = new ArrayList<Menu>(); 
     menuItems.add(new Menu(numContacts,handler.jsonDay,handler.jsonSoup,handler.jsonNonVegMain,handler.jsonNonVegSide,handler.jsonVegMain,handler.jsonVegSide)); 
     menuItems.add(new Menu(2,"fff","fff","e","e","3r","3rrr")); 


     return menuItems; 
    } 
} 

Answer 1

arrayList mMenuItemsは、表示したい異なるメニュー項目の配列です。あなたは既に

public void onBindViewHolder(DaysAdapter.ViewHolder viewHolder, int position) { 
    Menu menuItem = mMenuItems.get(position); 
    viewHolder.daysMenu.setText(menuItem.mDay); 
    viewHolder.soupMenu.setText(menuItem.mSoup); 
    viewHolder.nonVegMainMenu.setText(menuItem.mNonVegMain); 
    }