Question

这是我从服务器获取数据并显示在listview

中的方法

我希望按字母顺序显示列表，我在模型类的帮助下设置名称。 pojoRestaurant.setRestroName(jsonObject.getString("RestaurantName"));

我想相应地显示名单.CanterName.can有人告诉我怎么能这样做？

public void requestRestaurantSearchByFilter_list() {

mProgressDialog.show();
StringRequest restrolistrequestfilter = new StringRequest(Request.Method.POST, GlobalData.SEARCHBYFILTERURL,
        new Response.Listener<String>() {
            @Override
            public void onResponse(String response) {
                try {
                    mProgressDialog.dismiss();
                    mPaymentMethodList.clear();
                    mDataList.clear();
                    mAllList.clear();
                    mAdapter.notifyDataSetChanged();

                    Log.e("responcefilterlist....", response);

                    JSONObject jObject = new JSONObject(response);
                    if (jObject.getString("status").equals("1")) {

                        JSONArray jsonArray = jObject.getJSONArray("data");
                        for (int i = 0; i < jsonArray.length(); i++) {

                            JSONObject jsonObject = jsonArray.getJSONObject(i);
                            PojoRestaurant pojoRestaurant = new PojoRestaurant();

                            pojoRestaurant.setRestroName(jsonObject.getString("RestaurantName"));
                            pojoRestaurant.setDeliveryTime(jsonObject.optString("DeliveryTime"));
                            pojoRestaurant.setPaymentOption(jsonObject.getString("PaymentOptions"));
                            pojoRestaurant.setMinimumOrder(jsonObject.getString("MinimumOrder"));

                            if (jsonObject.getString("ImageUrl").equals("") || jsonObject.getString("ImageUrl") == "null") {


                            } else {
                                pojoRestaurant.setRestroImage(jsonObject.getString("ImageUrl"));
                            }

                            id = jsonObject.getString("ID");
                            mPaymentMethodList.add(jsonObject.getString("PaymentOptions"));

                            getpaymentId.add(id);
                            getListViewId.add(id);

                            if (jsonObject.getString("OpenStatus").equals("true")) {
                                pojoRestaurant.setOpenClose("Open");
                            } else {
                                pojoRestaurant.setOpenClose("Close");
                            }

                            mAllList.add(pojoRestaurant);
                            mDataList.add(pojoRestaurant);
                            //mDeliveryList.add(jsonObject.getString("DeliveryTime"));
                            // mCuisineTypeList.add(jsonObject.getString("RestaurantName"));
                        }

                        mListView.setAdapter(mAdapter);
                        mAdapter.notifyDataSetChanged();
                    } else {

                    }
                } catch (JSONException e) {
                    e.printStackTrace();
                }
            }
        },
        new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError volleyError) {

                Log.e("error", "" + volleyError.getMessage());
                if (volleyError.getMessage() == null)
                    requestRestaurantSearchByFilter_list();
            }
        }) {


    @Override
    protected Map<String, String> getParams() throws AuthFailureError {

        Map<String, String> params = new HashMap<String, String>();

        String foodid = getArguments().getString("FOODID");
        String areaid = getArguments().getString("AREAID");

        Log.e("foodid", "" + foodid);
        Log.e("areaid", "" + areaid);

        params.put("DeliveryAreaID", areaid);
        params.put("ProvideOffers", "0");
        params.put("NewRestaurant", "0");
        params.put("PaymentMethod", "0");
        params.put("OpenRestaurant", "0");
        params.put("FoodID", foodid);

        return params;
    }
};

RequestQueue restrolistqueuefilter = Volley.newRequestQueue(getContext());
restrolistrequestfilter.setShouldCache(false);
restrolistqueuefilter.add(restrolistrequestfilter);

}

这是我的Adpater课程

public class RestroListBaseAdapter extends BaseAdapter {

    private ArrayList<PojoRestaurant> mList;
    private Context mContext;
    private ViewHolder viewHolder;
    private ArrayList<PojoRestaurant> suggestion = new ArrayList<>();

    public RestroListBaseAdapter(Context mContext, ArrayList<PojoRestaurant> mList) {

        this.mContext = mContext;
        this.mList = mList;  
    }

    @Override
    public int getCount() {
        if (mList != null) {
            return mList.size();    
        }
        return 0;
    }

    @Override
    public Object getItem(int position) {
        return mList.get(position);
    }

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

    @Override
    public View getView(int position, View convertView, ViewGroup parent) {
        int lastPosition = -1;
        LayoutInflater layoutInflater = (LayoutInflater) mContext.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
        if (convertView == null) {
            convertView = layoutInflater.inflate(R.layout.restaurant_item, parent, false);
            viewHolder = new ViewHolder();
            viewHolder.RestroName = (TextView) convertView.findViewById(R.id.tv_restro_name);
            viewHolder.OpenClose = (TextView) convertView.findViewById(R.id.tvOpenClose);
            viewHolder.MinimumOrder = (TextView) convertView.findViewById(R.id.tv_minimun_order);
            viewHolder.DeliveryTime = (TextView) convertView.findViewById(R.id.tv_delivery_time);
            viewHolder.PaymentOption = (TextView) convertView.findViewById(R.id.tv_Payment);
            viewHolder.RestroImage = (ImageView) convertView.findViewById(R.id.img_restro_list);  
        } else {
            viewHolder = (ViewHolder) convertView.getTag();
        }    

        Animation animation = AnimationUtils.loadAnimation(mContext, (position > lastPosition) ? R.anim.up_from_bottom : R.anim.down_from_top);
        convertView.startAnimation(animation);
        lastPosition = position;    

        convertView.setTag(viewHolder);

        PojoRestaurant pojoRestaurant = (PojoRestaurant) getItem(position);

        viewHolder.RestroName.setText(pojoRestaurant.getRestroName());
        viewHolder.DeliveryTime.setText(pojoRestaurant.getDeliveryTime());
        viewHolder.MinimumOrder.setText(pojoRestaurant.getMinimumOrder());
        viewHolder.OpenClose.setText(pojoRestaurant.getOpenClose());
        viewHolder.PaymentOption.setText(pojoRestaurant.getPaymentOption());
        Picasso.with(mContext).load(pojoRestaurant.getRestroImage()).into(viewHolder.RestroImage);

        return convertView;
    }

    private class ViewHolder {
        private TextView RestroName, OpenClose, MinimumOrder, DeliveryTime, PaymentOption;
        private ImageView RestroImage;

    }
}

Answer 1

首先，您需要对已经用于设置适配器的列表（取决于您的逻辑，即按字母顺序）进行排序，然后通知列表适配器。

您可以使用自己的比较器对列表进行排序。

Comparator的示例代码：

Comparator comparator = new Comparator() {

    public int compare(PojoRestaurant restro1, PojoRestaurant restro2) {

      String restroName1 = restro1.getRestroName.toUpperCase();
      String restroName2 = restro2.getRestroName.toUpperCase();

      //ascending order
      return restroName1.compareTo(restroName2);

      //descending order
      //return restroName2.compareTo(restroName1);
    }

};

然后，您可以使用以下代码对列表进行排序

Collections.sort(yourList, collection)

Answer 2

您只需按字母顺序对从服务器返回的列表进行排序，然后将此列表直接添加到列表视图中。

例如，您有一个模型类：

public class Restaurant {
   String restaurantName;
   int restaurantStar;
}

您应该为此类实现Comparator接口：

public class Restaurant implements Comparator<Restaurant> {
       String restaurantName;
       int restaurantStar;

    @Override
    public int compare(Schedule s1, Schedule s2) {
        // because class String has already implemented Comparator. just get that
        return s1.restaurantName.compare(s2.restaurantName);
    }
}

最后，您可以对此餐馆列表进行排序：

// get somewhere on network
List<Restaurant> restaurants;
Collection.sort(restaurants);

最后，您可以直接将此列表分配给listview。例如：

adapter.setData(restaurants);
// refresh listview so listview will display new sorted data
adapter.notifyDataSetChanged();

以下是使用Comparator的另一个示例： comparator tutorial

如何设置自定义列表视图按字母顺序按项目名称？

2 个答案: