【发布时间】：2016-09-07 09:30:15
【问题描述】：
我正在从 json. 获取数据并显示在列表视图中。我使用比较器根据名称对列表视图进行了排序。问题是，当我单击排序后的列表视图时，它得到的是第一个项目的 ID，而不是排序项目的 ID。谁能告诉我如何解决这个问题？？
这是我的 json 数据：-
{
"status": 1,
"StatusMessage": "Restaurent List",
"data": [
{
"ID": "7",
"RestaurantName": "Water Lemon",
"MinimumOrder": "20.000",
"DeliveryTime": "",
"OpenStatus": true,
"PaymentOptions": "VISA, MasterCard , Maestro , American Express",
"Is New Restaurant": true,
"Is Provide Offer": true
},
{
"ID": "8",
"RestaurantName": "Casper and Gambini",
"MinimumOrder": "40.000",
"DeliveryTime": "",
"OpenStatus": true,
"PaymentOptions": "VISA, MasterCard , Maestro , American Express",
"Is New Restaurant": true,
"Is Provide Offer": true
},
{
"ID": "11",
"RestaurantName": "B L E N D S",
"MinimumOrder": "50.000",
"DeliveryTime": "",
"OpenStatus": true,
"PaymentOptions": "VISA, MasterCard , Maestro , American Express",
"Is New Restaurant": true,
"Is Provide Offer": true
},
{
"ID": "12",
"RestaurantName": "khyber Indian Cuisine",
"MinimumOrder": "5.000",
"DeliveryTime": "",
"OpenStatus": true,
"PaymentOptions": "VISA, MasterCard , Maestro , American Express",
"Is New Restaurant": true,
"Is Provide Offer": true
},
{
"ID": "13",
"RestaurantName": "Khyber Indian",
"MinimumOrder": "5.000",
"DeliveryTime": "",
"OpenStatus": true,
"PaymentOptions": "VISA, MasterCard , Maestro , American Express",
"Is New Restaurant": true,
"Is Provide Offer": true
},
{
"ID": "14",
"RestaurantName": "test",
"MinimumOrder": "10.000",
"DeliveryTime": "",
"OpenStatus": true,
"PaymentOptions": "VISA, MasterCard , Maestro , American Express",
"Is New Restaurant": true,
"Is Provide Offer": true
},
{
"ID": "15",
"RestaurantName": "yahoo",
"MinimumOrder": "5.000",
"DeliveryTime": "",
"OpenStatus": true,
"PaymentOptions": "VISA, MasterCard , Maestro , American Express",
"Is New Restaurant": true,
"Is Provide Offer": true
},
{
"ID": "16",
"RestaurantName": "Khaber",
"MinimumOrder": "3.000",
"DeliveryTime": "",
"OpenStatus": true,
"PaymentOptions": "VISA, MasterCard , Maestro , American Express",
"Is New Restaurant": true,
"Is Provide Offer": true
},
这是我解析 json 并在列表视图中显示的方法（）：-
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();
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");
pojoRestaurant.setRestroId(id);
mPaymentMethodList.add(jsonObject.getString("PaymentOptions"));
if (jsonObject.getString("OpenStatus").equals("true")) {
pojoRestaurant.setOpenClose("Open");
} else {
pojoRestaurant.setOpenClose("Close");
}
mAllList.add(pojoRestaurant);
mDataList.add(pojoRestaurant);
Collections.sort(mDataList, RestaurantList.getCompByName());
getpaymentId.add(id);
getListViewId.add(id);
}
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");
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);
}
这是我的比较器方法（），通过它我将列表视图设置为相应的恢复名称。 :-
public static Comparator<PojoRestaurant> getCompByName() {
Comparator<PojoRestaurant> comp = new Comparator<PojoRestaurant>() {
@Override
public int compare(PojoRestaurant lhs, PojoRestaurant rhs) {
return lhs.RestroName.compareTo(rhs.RestroName);
}
};
return comp;
}
以下是列表视图上的单击列表器，我在其中获取列表视图项的位置并获取列表视图项的 id：-
mListView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
@Override
public void onItemClick(AdapterView<?> adapterView, View view, int i, long l) {
mListViewItemId = getListViewId.get(i);
Fragment fragment = new RestrurantName();
Bundle b = new Bundle();
b.putString("ListViewitemId", mListViewItemId);
fragment.setArguments(b);
getFragmentManager().beginTransaction().replace(R.id.frame, fragment).addToBackStack(null).commit();
toolbar.setTitle("Restaurant Name");
}
});
其中getListViewId是字符串类型的数组列表。
这是我的适配器类：-
public class RestroListBaseAdapter extends BaseAdapter {
private ArrayList<PojoRestaurant> mList;
private Context mContext;
private ViewHolder viewHolder;
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;
}
}
问题：- 当我从列表视图中选择项目时，id (mListViewItemId) 将对应于 json id。我希望当我选择特定项目时，它需要该项目的 id。 在我的情况下，当我选择 Restro 名称（B L E N D S）时，它采用 id 7。请查看我的 json 并告诉我该怎么做？？
【问题讨论】：
-
你能发布你的适配器吗？
-
实际上您的恢复名称很短，但 id 并没有缩短，这就是您出错的原因。尝试从列表视图项中查找 id 的位置，然后获取 id .. 它会起作用
-
@Ashish 你是对的！但我不知道我该怎么做！你能告诉我吗？
标签： android json listview android-volley