java - 如何从android中的特定JSON对象获取ArrayList？

Question

我做了一个android Activity ，我正在解析来自JSON webservice的一些数据并将其显示到ListView中，现在我的问题是在我的网络服务中，每个 jsonObject 都有字符串数组(图像网址)，所以我不知道如何单独获取每个数组列表，我已经尝试过，但将所有数组值放入一个数组列表中，请帮助我如何为每个 json 执行单独的数组android中的对象，我的代码和网络服务如下: webservice link适配器

package com.eps.blancatours.adapter;

import java.util.ArrayList;
import java.util.HashMap;

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

import com.eps.blancatours.R;
import com.nostra13.universalimageloader.core.DisplayImageOptions;
import com.nostra13.universalimageloader.core.ImageLoader;
import com.nostra13.universalimageloader.core.ImageLoaderConfiguration;

public class DestinationAdapter extends BaseAdapter {
    public ArrayList<HashMap<String, Object>> detArray;

    private Context mContext;
    private DisplayImageOptions options;
    public static ImageLoader imageLoader;

    @SuppressWarnings("deprecation")
    public DestinationAdapter(Context paramContext,
            ArrayList<HashMap<String, Object>> list) {
        this.mContext = paramContext;
        this.detArray = list;

        imageLoader = ImageLoader.getInstance();
        imageLoader.init(ImageLoaderConfiguration.createDefault(paramContext));

        options = new DisplayImageOptions.Builder().cacheOnDisc(true)
                .showStubImage(R.drawable.noimage)
                .showImageOnFail(R.drawable.noimage).build();
        System.out.println(":::::::::::::::mY rESULTANT aRRALYlIST::::::::::::"
                + list);

    }

    public int getCount() {
        return this.detArray.size();
    }

    public Object getItem(int paramInt) {
        return Integer.valueOf(paramInt);
    }

    public long getItemId(int paramInt) {
        return paramInt;
    }

    @SuppressWarnings({ "static-access", "unchecked" })
    public View getView(int paramInt, View paramView, ViewGroup paramViewGroup) {
        LayoutInflater localLayoutInflater = (LayoutInflater) this.mContext
                .getSystemService("layout_inflater");
        Viewholder localViewholder = null;
        if (paramView == null) {
            paramView = localLayoutInflater.inflate(R.layout.raw_dest,
                    paramViewGroup, false);
            localViewholder = new Viewholder();

            localViewholder.destImg = ((ImageView) paramView
                    .findViewById(R.id.iv_dest));
            localViewholder.destName = ((TextView) paramView
                    .findViewById(R.id.tv_city));

            paramView.setTag(localViewholder);

        } else {
            localViewholder = new Viewholder();
            localViewholder = (Viewholder) paramView.getTag();
        }
        for (HashMap<String, Object> desti : detArray) {
            System.out.print("Desti id : " + desti.get("id"));
            System.out.print("Desti name : " + desti.get("name"));

            System.out.print("Desti program : " + desti.get("program"));
            System.out.print("Desti program_link : "
                    + desti.get("program_link"));
            System.out.print("Desti images_array size : "
                    + ((ArrayList<String>) desti.get("images_array")).size());
            ArrayList<HashMap<String, Object>> hotels = (ArrayList<HashMap<String, Object>>) desti
                    .get("hotels");
            for (HashMap<String, Object> hotel : hotels) {
                System.out.print("hotel id : " + hotel.get("id"));
                System.out.print("hotel city_id : " + hotel.get("city_id"));
                System.out.print("hotel name : " + hotel.get("name"));
                System.out.print("hotel images_array size : "
                        + ((ArrayList<String>) hotel.get("images_array"))
                                .size());
            }
            localViewholder.destName.setText(detArray.get(paramInt).desti
                    .get("name"));
            imageLoader.displayImage(detArray.get(paramInt).get(0),
                    localViewholder.destImg, options);

            return paramView;

        }
    }

    static class Viewholder {
        ImageView destImg;
        TextView destName;

    }
}

代码

ListView lv_dest;
    DestinationAdapter adapter;
    private ProgressDialog pDialog;
    JSONObject destinations = null;
    JSONArray imgArray = null;
    Header hdr;
    JSONArray hotelArray = null;
    Menu menu;
    ArrayList<HashMap<String, String>> destList;
    ArrayList<String> destiList, hotelList, hotel_images;
    String id;
    String name;
    String program;
    String program_link;
    String hotel_id;
    String city_id;
    String hotel_name;
    JSONArray hotel_images_array;
    Intent i;
private class GetDestinations extends AsyncTask<Void, Void, Void> {

        @Override
        protected void onPreExecute() {
            super.onPreExecute();
            // Showing progress dialog
            pDialog = new ProgressDialog(DestinationsActivity.this);
            pDialog.setMessage(getResources().getString(R.string.wait));
            pDialog.setCancelable(false);
            pDialog.show();

        }

        @Override
        protected Void doInBackground(Void... arg0) {
            // Creating service handler class instance
            BackendAPIService sh = new BackendAPIService();
            System.out
                    .println("::::::::::::::::::DESTINATIONS URL:::::::>>>>>>>>>"
                            + Const.API_DESTINATIONS);
            // Making a request to url and getting response
            String jsonStr = sh.makeServiceCall(Const.API_DESTINATIONS,
                    BackendAPIService.GET);

            Log.d("Response: ", "> " + jsonStr);

            if (jsonStr != null) {
                try {
                    JSONArray jsonArr = new JSONArray(jsonStr);

                    // Getting JSON Array node
                    // yes

                    // looping through All Contacts
                    for (int i = 0; i < jsonArr.length(); i++) {

                        JSONObject c = jsonArr.getJSONObject(i);
                        id = c.getString("id");
                        name = c.getString("name");
                        program = c.getString("program");
                        program_link = c.getString("program_link");
                        imgArray = c.getJSONArray("images_array");
                        HashMap<String, String> Destimap = new HashMap<String, String>();
                        Destimap.put("id", id);
                        Destimap.put("name", name);
                        Destimap.put("program", program);
                        Destimap.put("program_link", program_link);

                        if (imgArray != null && imgArray.length() != 0) {
                            for (int j = 0; j < imgArray.length(); j++) {
                                destiList.add(imgArray.getString(j));
                                System.out
                                        .println("::::::::::::::::::IMAGE URL:::::::::::::::::"
                                                + imgArray.getString(j));
                            }
                        }
                        hotelArray = c.getJSONArray("hotels");
                        if (hotelArray != null && hotelArray.length() != 0) {
                            for (int k = 0; k < hotelArray.length(); k++) {

                                JSONObject d = hotelArray.getJSONObject(k);
                                hotel_id = d.getString("id");
                                city_id = d.getString("city_id");
                                hotel_name = d.getString("name");

                                Destimap.put("hotel_id", hotel_id);
                                Destimap.put("city_id", city_id);
                                Destimap.put("hotel_name", hotel_name);

                                hotel_images_array = d
                                        .getJSONArray("images_array");

                                if (hotel_images_array != null
                                        && hotel_images_array.length() != 0) {
                                    for (int l = 0; l < hotel_images_array
                                            .length(); l++) {
                                        hotel_images.add(hotel_images_array
                                                .getString(l));
                                    }
                                }

                            }
                        }
                        destList.add(Destimap);

                    }
                } catch (JSONException e) {
                    e.printStackTrace();
                }
            } else {
                Log.e("ServiceHandler", "Couldn't get any data from the url");
            }

            return null;
        }

        @Override
        protected void onPostExecute(Void result) {
            super.onPostExecute(result);
            // Dismiss the progress dialog
            if (pDialog.isShowing())
                pDialog.dismiss();
            /**
             * Updating parsed JSON data into ListView
             * */
            adapter = new DestinationAdapter(DestinationsActivity.this,
                    destList, destiList);
            lv_dest.setAdapter(adapter);
        }

    }

Answer 1

试试这个方法，希望能帮助您解决问题。

String jsonStr ="[{\"id\":\"1\",\"name\":\"Bodrum\",\"program\":null,\"program_link\":null,\"images_array\":[\"http:\\/\\/dev.booking.blancatours.com\\/uploads\\/53d1f3fde123b.jpg\",\"http:\\/\\/dev.booking.blancatours.com\\/uploads\\/53d1f3fde20d4.jpg\",\"http:\\/\\/dev.booking.blancatours.com\\/uploads\\/53d1f3fde21c6.jpg\",\"http:\\/\\/dev.booking.blancatours.com\\/uploads\\/53d1f43b43e37.jpg\"],\"hotels\":[{\"id\":\"3\",\"city_id\":\"1\",\"name\":\"Bodrum Hotel\",\"images_array\":[]}]},{\"id\":\"2\",\"name\":\"Bursa\",\"program\":null,\"program_link\":null,\"images_array\":[\"http:\\/\\/dev.booking.blancatours.com\\/uploads\\/53d1f4ff167a8.jpg\",\"http:\\/\\/dev.booking.blancatours.com\\/uploads\\/53d1f4ff168e1.jpg\",\"http:\\/\\/dev.booking.blancatours.com\\/uploads\\/53d1f4ff169cb.jpg\"],\"hotels\":[{\"id\":\"4\",\"city_id\":\"2\",\"name\":\"Bursa Hotel\",\"images_array\":[]}]},{\"id\":\"3\",\"name\":\"Istanbul\",\"program\":null,\"program_link\":null,\"images_array\":[\"http:\\/\\/dev.booking.blancatours.com\\/uploads\\/53d1f5d1927ce.jpg\"],\"hotels\":[{\"id\":\"2\",\"city_id\":\"3\",\"name\":\"Istanbul Hotel\",\"images_array\":[]}]},{\"id\":\"4\",\"name\":\"Bolu\",\"program\":null,\"program_link\":null,\"images_array\":[\"http:\\/\\/dev.booking.blancatours.com\\/uploads\\/53d1f8f500afc.jpg\"],\"hotels\":[]},{\"id\":\"5\",\"name\":\"Trabzon\",\"program\":null,\"program_link\":null,\"images_array\":[],\"hotels\":[]},{\"id\":\"6\",\"name\":\"Yalova\",\"program\":null,\"program_link\":null,\"images_array\":[],\"hotels\":[]},{\"id\":\"7\",\"name\":\"Sapanca\",\"program\":null,\"program_link\":null,\"images_array\":[],\"hotels\":[]},{\"id\":\"8\",\"name\":\"Antalya\",\"program\":null,\"program_link\":null,\"images_array\":[],\"hotels\":[]}]";
try {
     JSONArray jsonArr = new JSONArray(jsonStr);

     ArrayList<HashMap<String,Object>> list = new ArrayList<HashMap<String, Object>>();
     for (int i = 0; i < jsonArr.length(); i++) {
          HashMap<String, Object> destiMap = new HashMap<String, Object>();
          destiMap.put("id", jsonArr.getJSONObject(i).getString("id"));
          destiMap.put("name", jsonArr.getJSONObject(i).getString("name"));
          destiMap.put("program", jsonArr.getJSONObject(i).getString("program"));
          destiMap.put("program_link", jsonArr.getJSONObject(i).getString("program_link"));

          ArrayList<String> images = new ArrayList<String>();
          JSONArray imagesJsonArray = jsonArr.getJSONObject(i).getJSONArray("images_array");
          for(int j=0;j<imagesJsonArray.length();j++){
              images.add(imagesJsonArray.getString(j));
          }
          destiMap.put("images_array", images);

          ArrayList<HashMap<String,Object>> hotels = new ArrayList<HashMap<String,Object>>();
          JSONArray hotelsJsonArray = jsonArr.getJSONObject(i).getJSONArray("hotels");
          for(int j=0;j<hotelsJsonArray.length();j++){
              HashMap<String,Object> hotelMap = new HashMap<String, Object>();
              hotelMap.put("id",hotelsJsonArray.getJSONObject(j).getString("id"));
              hotelMap.put("city_id",hotelsJsonArray.getJSONObject(j).getString("city_id"));
              hotelMap.put("name",hotelsJsonArray.getJSONObject(j).getString("name"));

              ArrayList<String> hotelImages = new ArrayList<String>();
              JSONArray hotelImagesJsonArray = hotelsJsonArray.getJSONObject(j).getJSONArray("images_array");
              for(int k=0;k<hotelImagesJsonArray.length();k++){
                  hotelImages.add(hotelImagesJsonArray.getString(k));
              }
              hotelMap.put("images_array", hotelImages);
              hotels.add(hotelMap);
           }
           destiMap.put("hotels",hotels);
           list.add(destiMap);
      }

      for (HashMap<String,Object> desti : list){
           System.out.print("Desti id : " + desti.get("id"));
           System.out.print("Desti name : " + desti.get("name"));
           System.out.print("Desti program : "+desti.get("program"));
           System.out.print("Desti program_link : " + desti.get("program_link"));
           System.out.print("Desti images_array size : "+((ArrayList<String>)desti.get("images_array")).size());
           ArrayList<HashMap<String,Object>> hotels = (ArrayList<HashMap<String,Object>>) desti.get("hotels");
           for (HashMap<String,Object> hotel : hotels){
                System.out.print("hotel id : " + hotel.get("id"));
                System.out.print("hotel city_id : " + hotel.get("city_id"));
                System.out.print("hotel name : "+hotel.get("name"));
                System.out.print("hotel images_array size : "+((ArrayList<String>)hotel.get("images_array")).size());
           }
      }
} catch (JSONException e) {
      e.printStackTrace();
}


public class DestinationAdapter extends BaseAdapter {
    public ArrayList<HashMap<String, Object>> detArray;
    private Context mContext;
    private DisplayImageOptions options;
    public static ImageLoader imageLoader;

    @SuppressWarnings("deprecation")
    public DestinationAdapter(Context paramContext,ArrayList<HashMap<String, Object>> list) {
        this.mContext = paramContext;
        this.detArray = list;
        imageLoader = ImageLoader.getInstance();
        imageLoader.init(ImageLoaderConfiguration.createDefault(paramContext));
        options = new DisplayImageOptions.Builder().cacheOnDisc(true)
                .showStubImage(R.drawable.noimage)
                .showImageOnFail(R.drawable.noimage).build();
    }

    public int getCount() {
        return detArray.size();
    }

    public Object getItem(int pos) {
        return detArray.get(pos);
    }

    public long getItemId(int pos) {
        return pos;
    }

    public View getView(int position, View view, ViewGroup paramViewGroup) {
        Viewholder holder;
        if (view == null) {
            holder = new Viewholder();
            view = LayoutInflater.from(mContext).inflate(R.layout.raw_dest, paramViewGroup, false);
            holder.destImg = (ImageView) view.findViewById(R.id.iv_dest);
            holder.destName = (TextView) view.findViewById(R.id.tv_city);
            view.setTag(holder);
        } else {
            holder = (Viewholder) view.getTag();
        }
        holder.destName.setText((String)detArray.get(position).get("name"));
        holder.destName.setText((String)detArray.get(position).get("name"));
        ArrayList<String> images = (ArrayList<String>)detArray.get(position).get("images_array");
        if(images!=null && images.size()>0){
            imageLoader.displayImage(images.get(0),holder.destImg, options);
        }
        return view;
    }

    class Viewholder {
        ImageView destImg;
        TextView destName;
    }
}