Question

我在设置json数据时遇到问题，只设置最后一项4次无法设置其他项目尝试了很多方法无法找到它请朋友们帮忙

这是我正在使用的JSON： http://www.yell4food.com/json/data_standard_item_new.php

这是java

public class Secondlevel extends Activity {

    List<JSONParser> itemsdata = new ArrayList<JSONParser>();
    String item, ids;
    ListView sec;
    Second_adapter secondAdapter;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.secondlist);
        sec = (ListView) findViewById(R.id.seondlst);
        secondAdapter = new Second_adapter(Secondlevel.this, itemsdata);
        sec.setAdapter(secondAdapter);
        Intent hello = getIntent();
        item = hello.getStringExtra("name");
        new loaditems().execute();
    }
    public class loaditems extends AsyncTask<String, String, String> {
        @Override
        protected String doInBackground(String... strings) {
            String url = "http://www.yell4food.com/json/data_standard_item_new.php";
            List<NameValuePair> params = new ArrayList<NameValuePair>();
            params.add(new BasicNameValuePair("rname","standardtakeaway"));
            params.add(new BasicNameValuePair("cname", item));
            params.add(new BasicNameValuePair("cids", ids));
            Calling calling = new Calling();
            String jurl = calling.makeHttpRequest(url, "GET", params);
            Log.d("dataurls", jurl);
            try {
                JSONArray array = new JSONArray(jurl);
                for (int i = 0; i < array.length(); i++) {
                    JSONObject first = array.getJSONObject(i);
                    JSONParser parser = new JSONParser();
                    parser.setMenuname(first.getString("menu_name"));
                    JSONArray getitems = first.getJSONArray("items");
                    for (int j = 0; j < getitems.length(); j++) {
                        JSONObject sitems = getitems.getJSONObject(j);
                        parser.setIid(sitems.getInt("id"));
                        parser.setBaseName(sitems.getString("BaseName"));
                        parser.setItemdesc(sitems.getString("itemdesc"));
                        JSONArray subitems = sitems.getJSONArray("subitems");
                        for (int l = 0; l < subitems.length(); l++) {
                            JSONObject thrid = subitems.getJSONObject(l);
                            parser.setSid(thrid.getInt("id"));
                            parser.setSubItemdesc(thrid.getString("SubItemdesc"));
                            parser.setSubItemprice(thrid.getString("SubItemprice"));
                        }
                        itemsdata.add(parser);
                    }
                }
            } catch (JSONException e) {
                e.printStackTrace();
            }
            return null;
        }
        @Override
        protected void onPostExecute(String s) {
            super.onPostExecute(s);
            Toast.makeText(getApplicationContext(), ""+item, Toast.LENGTH_SHORT).show();
            secondAdapter.notifyDataSetChanged();
        }
    }
}

这是适配器：

package com.app.prominere.standardtakeout;

import android.content.Context;
import android.view.LayoutInflater;
import android.view.View;
import android.view.ViewGroup;
import android.widget.BaseAdapter;
import android.widget.TextView;

import java.util.List;

/**
 * Created by prominere on 20-Oct-15.
 */
public class Second_adapter extends BaseAdapter {
    Context context;
    TextView basename,SubItemprice,itemdesc,SubItemdesc;
    LayoutInflater inflater;
    private List<JSONParser> items;

    public Second_adapter(Context context, List<JSONParser> items) {
        this.context = context;
        this.items = items;
    }

    @Override
    public int getCount() {
        return items.size();
    }

    @Override
    public Object getItem(int i) {
        return items.get(i);
    }

    @Override
    public long getItemId(int i) {
        return i;
    }

    @Override
    public View getView(int i, View view, ViewGroup viewGroup) {
        inflater = (LayoutInflater) context.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        if(view==null)
        view = inflater.inflate(R.layout.item_clicked, viewGroup, false);
        basename = (TextView) view.findViewById(R.id.basename);
        SubItemprice = (TextView) view.findViewById(R.id.SubItemprice);
        itemdesc = (TextView) view.findViewById(R.id.itemdesc);
        SubItemdesc = (TextView) view.findViewById(R.id.SubItemdesc);
        JSONParser setdata = items.get(i);
        basename.setText(setdata.getBaseName());
        itemdesc.setText(setdata.getItemdesc());
        SubItemdesc.setText(setdata.getSubItemdesc());
        SubItemprice.setText(setdata.getSubItemprice());
        return view;
    }
}

这是XML：

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    >


    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceLarge"
        android:text="BaseName"
        android:id="@+id/basename"
        android:layout_alignParentTop="true"
        android:layout_alignParentStart="true"
        />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceMedium"
        android:text="SubItemdesc"
        android:id="@+id/SubItemdesc"
        android:layout_below="@+id/basename"
        android:layout_alignParentStart="true" />

    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceMedium"
        android:text="SubItemprice"
        android:id="@+id/SubItemprice"
        android:layout_alignParentTop="true"
        android:layout_toEndOf="@+id/basename"
        android:layout_margin="5dp"/>
    <TextView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:textAppearance="?android:attr/textAppearanceMedium"
        android:text="SubItemdesc"
        android:id="@+id/itemdesc"
        android:layout_below="@id/SubItemdesc"
        />
    <ImageView
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/order"
        android:layout_margin="10dp"
        android:src="@drawable/order"
        android:layout_alignParentTop="true"
        android:layout_alignParentEnd="true" />


</RelativeLayout>
http://i.stack.imgur.com/SzhfK.png

Answer 1

将JSONParser parser = new JSONParser();移到第二个 for循环中。

您的代码将是这样的：

    JSONObject first = array.getJSONObject(i);
    JSONArray getitems = first.getJSONArray("items");
    for (int j = 0; j < getitems.length(); j++) {

         JSONParser parser = new JSONParser();
         parser.setMenuname(first.getString("menu_name"));

         JSONObject sitems = getitems.getJSONObject(j);
         parser.setIid(sitems.getInt("id"));
         parser.setBaseName(sitems.getString("BaseName"));
         parser.setItemdesc(sitems.getString("itemdesc"));
         JSONArray subitems = sitems.getJSONArray("subitems");

         for (int l = 0; l < subitems.length(); l++) {

              JSONObject thrid = subitems.getJSONObject(l);
              parser.setSid(thrid.getInt("id"));
              parser.setSubItemdesc(thrid.getString("SubItemdesc"));
              parser.setSubItemprice(thrid.getString("SubItemprice"));

         }

         itemsdata.add(parser);
    }

Answer 2

这个答案并没有专门解答这个问题，但可以用来解决几个Gson和Json反序列化问题。

这些代码可以使用Gson库轻松使用，同时填充对象。这可以很容易地在代码中使用。

创建一个包含菜单项的Response类

import java.util.ArrayList;

import com.google.gson.annotations.SerializedName;

public class Response {

@SerializedName("menu_name")
private String menuName;

@SerializedName("items")
private ArrayList<Items> items;

public String getMenuName() {
    return menuName;
}

public void setMenuName(String menuName) {
    this.menuName = menuName;
}

public ArrayList<Items> getItems() {
    return items;
}

public void setItems(ArrayList<Items> items) {
    this.items = items;
}
}

Items.class

import java.util.ArrayList;

import com.google.gson.annotations.SerializedName;

public class Items {

@SerializedName("id")
private String id;

@SerializedName("BaseName")
private String baseName;

@SerializedName("itemdesc")
private String itemdesc;

@SerializedName("subitems")
private ArrayList<SubItem> subItems;

public String getId() {
    return id;
}

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

public String getBaseName() {
    return baseName;
}

public void setBaseName(String baseName) {
    this.baseName = baseName;
}

public String getItemdesc() {
    return itemdesc;
}

public void setItemdesc(String itemdesc) {
    this.itemdesc = itemdesc;
}

public ArrayList<SubItem> getSubItems() {
    return subItems;
}

public void setSubItems(ArrayList<SubItem> subItems) {
    this.subItems = subItems;
}

}

SubItem.class

import com.google.gson.annotations.SerializedName;

public class SubItem {

@SerializedName("id")
private String id;

@SerializedName("SubItemdesc")
private String subItemdesc;

@SerializedName("SubItemprice")
private String subItemprice;

public String getId() {
    return id;
}

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

public String getSubItemdesc() {
    return subItemdesc;
}

public void setSubItemdesc(String subItemdesc) {
    this.subItemdesc = subItemdesc;
}

public String getSubItemprice() {
    return subItemprice;
}

public void setSubItemprice(String subItemprice) {
    this.subItemprice = subItemprice;
}
}

您可以使用以下类来读取整个数据并使用Gson库

填充对象

import java.net.URL;
import java.net.URLConnection;
import java.util.ArrayList;

import org.apache.commons.io.IOUtils;

import com.google.gson.Gson;
import com.google.gson.reflect.TypeToken;

public class MyTest {
public static void main(String[] args) {
    String stringurl = "http://www.yell4food.com/json/data_standard_item_new.php";
    try {
        URL url = new URL(stringurl);
        URLConnection connection = url.openConnection();
        connection.connect();
        String result = IOUtils.toString(connection.getInputStream());
        System.out.println("" + result);
        ArrayList<Response> responses = (new Gson()).fromJson(result,
                new TypeToken<ArrayList<Response>>() {
                }.getType());
        for (Response response : responses) {
            System.out.println("" + response.getMenuName());

            ArrayList<Items> items = response.getItems();

            if (items != null) {
                if (!items.isEmpty()) {
                    for (Items items2 : items) {
                        System.out.println("\t"+items2.getId());
                        System.out.println("\t"+items2.getBaseName());
                        System.out.println("\t"+items2.getItemdesc());

                            if (items3 != null) {
                            if (!items3.isEmpty()) {
                                for (SubItem subItem : items3) {
                                    System.out.println("\t\t"+subItem.getId());
                                    System.out.println("\t\t"+subItem.getSubItemdesc());
                                    System.out.println("\t\t"+subItem.getSubItemprice());
                                }
                            }
                        }
                    }
                }

            }

        }

    } catch (Exception e) {
        // TODO Auto-generated catch block
        e.printStackTrace();
    }
}
}

此示例使用两个库commons-io-2.4.jar和Gson

Beverages
1
Coca-Cola

    1
    0.33L
    0.75
    2
    1.5L
    1.85
2
Diet Coca-Cola

    1
    0.33L
    0.75
    2
    1.5L
    1.85

JSON对齐其循环相同的项目

2 个答案: