我正在尝试运行一个应用程序，因为这个错误它崩溃了：
FATAL EXCEPTION: main
Process: com.panaceasoft.citiesdirectory, PID: 4201
com.google.gson.JsonSyntaxException: java.lang.NumberFormatException: Invalid double: ""
它有一些Gradle错误，但我已经解决了它们，现在当我试图运行应用程序时它仍然崩溃了。看起来这个问题出现在下面的类中，在252行。尝试了一切可能来检查数据并解决这个错误，但到目前为止还没有。我该怎么办？谢谢！
CitiesListFragment：
public class CitiesListFragment extends Fragment {
//-------------------------------------------------------------------------------------------------------------------------------------
//region // Private Variables
//-------------------------------------------------------------------------------------------------------------------------------------
private RecyclerView mRecyclerView;
private ProgressWheel progressWheel;
private CityAdapter adapter;
private SwipeRefreshLayout swipeRefreshLayout;
private TextView display_message;
private ArrayList<PCityData> pCityDataList;
private ArrayList<PCityData> pCityDataSet;
private NestedScrollView singleLayout;
private TextView scCityName;
private TextView scCityLocation;
private TextView scCityAbout;
private TextView scCityCatCount;
private TextView scCitySubCatCount;
private TextView scCityItemCount;
private ImageView scCityPhoto;
private Button scCityExplore;
private String jsonStatusSuccessString;
private String connectionError;
//-------------------------------------------------------------------------------------------------------------------------------------
//endregion Public Variables
//-------------------------------------------------------------------------------------------------------------------------------------
//-------------------------------------------------------------------------------------------------------------------------------------
//region // Constructor
//-------------------------------------------------------------------------------------------------------------------------------------
public CitiesListFragment() {
}
//-------------------------------------------------------------------------------------------------------------------------------------
//endregion Constructor
//-------------------------------------------------------------------------------------------------------------------------------------
//-------------------------------------------------------------------------------------------------------------------------------------
//region // Override Functions
//-------------------------------------------------------------------------------------------------------------------------------------
@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
// Inflate the layout for this fragment
View view = inflater.inflate(R.layout.fragment_cities_list, container, false);
initUI(view);
initData();
return view;
}
//-------------------------------------------------------------------------------------------------------------------------------------
//endregion Override Functions
//-------------------------------------------------------------------------------------------------------------------------------------
//-------------------------------------------------------------------------------------------------------------------------------------
//region // Init UI Function
//-------------------------------------------------------------------------------------------------------------------------------------
private void initUI(View view){
initSingleUI(view);
initSwipeRefreshLayout(view);
initProgressWheel(view);
initRecyclerView(view);
startLoading();
}
private void initSingleUI(View view) {
singleLayout =(NestedScrollView) view.findViewById(R.id.single_city_layout);
scCityName = (TextView) view.findViewById(R.id.sc_city_name);
scCityLocation = (TextView) view.findViewById(R.id.sc_city_loc);
scCityAbout = (TextView) view.findViewById(R.id.sc_city_desc);
scCityCatCount = (TextView) view.findViewById(R.id.txt_cat_count);
scCitySubCatCount = (TextView) view.findViewById(R.id.txt_sub_cat_count);
scCityItemCount = (TextView) view.findViewById(R.id.txt_item_count);
scCityPhoto = (ImageView) view.findViewById(R.id.sc_city_photo);
scCityExplore = (Button) view.findViewById(R.id.button_explore);
int screenWidth = Utils.getScreenWidth();
int rlWidth = (screenWidth/3) - 20;
RelativeLayout r1 = (RelativeLayout) view.findViewById(R.id.rl_count1);
RelativeLayout r2 = (RelativeLayout) view.findViewById(R.id.rl_count2);
RelativeLayout r3 = (RelativeLayout) view.findViewById(R.id.rl_count3);
r1.setMinimumWidth(rlWidth);
r2.setMinimumWidth(rlWidth);
r3.setMinimumWidth(rlWidth);
scCityPhoto.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if(pCityDataList !=null && pCityDataList.size() > 0) {
final Intent intent;
intent = new Intent(getActivity(), SelectedCityActivity.class);
GlobalData.citydata = pCityDataList.get(0);
intent.putExtra("selected_city_id", pCityDataList.get(0).id);
getActivity().startActivity(intent);
getActivity().overridePendingTransition(R.anim.right_to_left, R.anim.blank_anim);
}
}
});
scCityExplore.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
if(pCityDataList !=null && pCityDataList.size() > 0) {
final Intent intent;
intent = new Intent(getActivity(), SelectedCityActivity.class);
GlobalData.citydata = pCityDataList.get(0);
intent.putExtra("selected_city_id", pCityDataList.get(0).id);
getActivity().startActivity(intent);
getActivity().overridePendingTransition(R.anim.right_to_left, R.anim.blank_anim);
}
}
});
}
private void initSwipeRefreshLayout(View view) {
swipeRefreshLayout = (SwipeRefreshLayout) view.findViewById(R.id.swipe_refresh);
swipeRefreshLayout.setOnRefreshListener(new SwipeRefreshLayout.OnRefreshListener() {
@Override
public void onRefresh() {
requestData(Config.APP_API_URL + Config.GET_ALL);
}
});
}
private void initProgressWheel(View view) {
progressWheel = (ProgressWheel) view.findViewById(R.id.progress_wheel);
}
private void initRecyclerView(View view) {
mRecyclerView = (RecyclerView) view.findViewById(R.id.my_recycler_view);
mRecyclerView.setHasFixedSize(true);
LinearLayoutManager llm = new LinearLayoutManager(getActivity());
mRecyclerView.setLayoutManager(llm);
display_message = (TextView) view.findViewById(R.id.display_message);
display_message.setVisibility(view.GONE);
pCityDataSet = new ArrayList<>();
adapter = new CityAdapter(getActivity(), pCityDataSet);
mRecyclerView.setAdapter(adapter);
mRecyclerView.addOnItemTouchListener(new RecyclerTouchListener(getActivity(), mRecyclerView, new ClickListener() {
@Override
public void onClick(View view, int position) {
onItemClicked(position);
}
@Override
public void onLongClick(View view, int position) {
}
}));
}
//-------------------------------------------------------------------------------------------------------------------------------------
//endregion Init UI Function
//-------------------------------------------------------------------------------------------------------------------------------------
//-------------------------------------------------------------------------------------------------------------------------------------
//region // Init Data Function
//-------------------------------------------------------------------------------------------------------------------------------------
private void initData(){
requestData(Config.APP_API_URL + Config.GET_ALL);
jsonStatusSuccessString = getResources().getString(R.string.json_status_success);
connectionError = getResources().getString(R.string.connection_error);
}
private void requestData(String uri) {
JsonObjectRequest request = new JsonObjectRequest(uri,
new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
try {
String status = response.getString("status");
if (status.equals(jsonStatusSuccessString)) {
progressWheel.setVisibility(View.GONE);
Gson gson = new Gson();
Type listType = new TypeToken<List<PCityData>>() {
}.getType();
//String data="";
pCityDataList = gson.fromJson(response.getString("Data"), listType);
Utils.psLog("City Count : " + pCityDataList.size());
if(pCityDataList.size() > 1) {
singleLayout.setVisibility(View.GONE);
mRecyclerView.setVisibility(View.VISIBLE);
updateDisplay();
}else{
mRecyclerView.setVisibility(View.GONE);
singleLayout.setVisibility(View.VISIBLE);
stopLoading();
updateSingleDisplay();
}
updateGlobalCityList();
} else {
stopLoading();
Utils.psLog("Error in loading CityList.");
}
} catch (JSONException e) {
Utils.psErrorLogE("Error in loading CityList.", e);
stopLoading();
e.printStackTrace();
}
}
},
new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError ex) {
progressWheel.setVisibility(View.GONE);
stopLoading();
/* NetworkResponse response = ex.networkResponse;
if (response != null && response.data != null) {
} else {*/
try {
display_message.setVisibility(View.VISIBLE);
display_message.setText(connectionError);
}catch (Exception e){
Utils.psErrorLogE("Error in Connection Url.", e);
}
//}
}
});
request.setRetryPolicy(new DefaultRetryPolicy(
5000,
DefaultRetryPolicy.DEFAULT_MAX_RETRIES,
DefaultRetryPolicy.DEFAULT_BACKOFF_MULT));
RequestQueue queue = Volley.newRequestQueue(getActivity().getApplicationContext());
queue.add(request);
}
//-------------------------------------------------------------------------------------------------------------------------------------
//endregion Init Data Function
//-------------------------------------------------------------------------------------------------------------------------------------
//-------------------------------------------------------------------------------------------------------------------------------------
//region // Bind Functions
//-------------------------------------------------------------------------------------------------------------------------------------
private void updateSingleDisplay() {
try {
if (pCityDataList.size() > 0) {
display_message.setVisibility(View.GONE);
singleLayout.startAnimation(AnimationUtils.loadAnimation(getActivity(), R.anim.fade_in));
scCityName.setText(pCityDataList.get(0).name);
scCityLocation.setText(pCityDataList.get(0).address);
scCityAbout.setText(pCityDataList.get(0).description);
scCityCatCount.setText(pCityDataList.get(0).category_count + " Categories");
scCitySubCatCount.setText(pCityDataList.get(0).sub_category_count + " Sub Categories");
scCityItemCount.setText(pCityDataList.get(0).item_count + " Items");
Picasso.with(getActivity()).load(Config.APP_IMAGES_URL + pCityDataList.get(0).cover_image_file).into(scCityPhoto);
}
}catch(Exception e){
Utils.psErrorLogE("Error in single display data binding.", e);
}
}
private void updateGlobalCityList() {
GlobalData.cityDatas.clear();
for (PCityData cd : pCityDataList) {
GlobalData.cityDatas.add(cd);
}
}
private void updateDisplay() {
if (swipeRefreshLayout.isRefreshing()) {
pCityDataSet.clear();
adapter.notifyDataSetChanged();
for (PCityData cd : pCityDataList) {
pCityDataSet.add(cd);
}
} else {
for (PCityData cd : pCityDataList) {
pCityDataSet.add(cd);
}
}
stopLoading();
adapter.notifyItemInserted(pCityDataSet.size());
}
//-------------------------------------------------------------------------------------------------------------------------------------
//endregion Bind Functions
//-------------------------------------------------------------------------------------------------------------------------------------
//-------------------------------------------------------------------------------------------------------------------------------------
//region // Private Functions
//-------------------------------------------------------------------------------------------------------------------------------------
private void onItemClicked(int position) {
Utils.psLog("Position : " + position);
Intent intent;
intent = new Intent(getActivity(),SelectedCityActivity.class);
GlobalData.citydata = pCityDataList.get(position);
intent.putExtra("selected_city_id", pCityDataList.get(position).id);
getActivity().startActivity(intent);
getActivity().overridePendingTransition(R.anim.right_to_left, R.anim.blank_anim);
}
private void startLoading(){
try{
swipeRefreshLayout.post(new Runnable() {
@Override
public void run() {
swipeRefreshLayout.setRefreshing(true);
}
});
}catch (Exception e){}
}
private void stopLoading(){
try {
if (swipeRefreshLayout.isRefreshing()) {
swipeRefreshLayout.setRefreshing(false);
}
}catch (Exception e){}
}
//-------------------------------------------------------------------------------------------------------------------------------------
//endregion Private Functions
//-------------------------------------------------------------------------------------------------------------------------------------
第252行：
pCityDataList = gson.fromJson(response.getString("data"), listType);
PCityData.class：
package com.panaceasoft.citiesdirectory.models;
import android.os.Parcel;
import android.os.Parcelable;
import java.util.ArrayList;
/**
* Created by Panacea-Soft on 6/8/15.
* Contact Email : teamps.is.cool@gmail.com
*/
public class PCityData implements Parcelable {
public int id;
public String name;
public String description;
public String address;
public String lat;
public String lng;
public String added;
public int status;
public int item_count;
public int category_count;
public int sub_category_count;
public int follow_count;
public String cover_image_file;
public int cover_image_width;
public int cover_image_height;
public String cover_image_description;
public ArrayList<PCategoryData> categories;
protected PCityData(Parcel in) {
id = in.readInt();
name = in.readString();
description = in.readString();
address = in.readString();
lat = in.readString();
lng = in.readString();
added = in.readString();
status = in.readInt();
item_count = in.readInt();
category_count = in.readInt();
sub_category_count = in.readInt();
follow_count = in.readInt();
cover_image_file = in.readString();
cover_image_width = in.readInt();
cover_image_height = in.readInt();
cover_image_description = in.readString();
if (in.readByte() == 0x01) {
categories = new ArrayList<PCategoryData>();
in.readList(categories, PCategoryData.class.getClassLoader());
} else {
categories = null;
}
}
@Override
public int describeContents() {
return 0;
}
@Override
public void writeToParcel(Parcel dest, int flags) {
dest.writeInt(id);
dest.writeString(name);
dest.writeString(description);
dest.writeString(address);
dest.writeString(lat);
dest.writeString(lng);
dest.writeString(added);
dest.writeInt(status);
dest.writeInt(item_count);
dest.writeInt(category_count);
dest.writeInt(sub_category_count);
dest.writeInt(follow_count);
dest.writeString(cover_image_file);
dest.writeInt(cover_image_width);
dest.writeInt(cover_image_height);
dest.writeString(cover_image_description);
if (categories == null) {
dest.writeByte((byte) (0x00));
} else {
dest.writeByte((byte) (0x01));
dest.writeList(categories);
}
}
@SuppressWarnings("unused")
public static final Parcelable.Creator<PCityData> CREATOR = new Parcelable.Creator<PCityData>() {
@Override
public PCityData createFromParcel(Parcel in) {
return new PCityData(in);
}
@Override
public PCityData[] newArray(int size) {
return new PCityData[size];
}
};
}
L.E：
数据：
[{"id":"1","name":"Maramureș","description":"Maramureș is a mountainous .","address":"Maramureș, Romania","lat":"0","lng":"0","admin_id":"3","is_approved":"1","paypal_trans_id":"0","added":"2016-07-1420:45:50","status":"1","item_count":85,"category_count":49,"sub_category_count":0,"follow_count":0,"cover_image_file":"singapore.png","cover_image_width":"600","cover_image_height":"400","cover_image_description":"Singapore","categories":
L.E：
PCategoryData.java：
package com.panaceasoft.citiesdirectory.models;
import android.os.Parcel;
import android.os.Parcelable;
import java.util.ArrayList;
/**
* Created by Panacea-Soft on 8/8/15.
* Contact Email : teamps.is.cool@gmail.com
*/
public class PCategoryData implements Parcelable {
public int id;
public int shop_id;
public String name;
public int is_published;
public int ordering;
public String added;
public String updated;
public String cover_image_file;
public int cover_image_width;
public int cover_image_height;
public ArrayList<PSubCategoryData> sub_categories;
public Double value;
protected PCategoryData(Parcel in) {
id = in.readInt();
shop_id = in.readInt();
name = in.readString();
is_published = in.readInt();
ordering = in.readInt();
added = in.readString();
updated = in.readString();
cover_image_file = in.readString();
cover_image_width = in.readInt();
cover_image_height = in.readInt();
if (in.readByte() == 0x01) {
sub_categories = new ArrayList<PSubCategoryData>();
in.readList(sub_categories, PSubCategoryData.class.getClassLoader());
} else {
sub_categories = null;
}
}
@Override
public int describeContents() {
return 0;
}
@Override
public void writeToParcel(Parcel dest, int flags) {
dest.writeInt(id);
dest.writeInt(shop_id);
dest.writeString(name);
dest.writeInt(is_published);
dest.writeInt(ordering);
dest.writeString(added);
dest.writeString(updated);
dest.writeString(cover_image_file);
dest.writeInt(cover_image_width);
dest.writeInt(cover_image_height);
if (sub_categories == null) {
dest.writeByte((byte) (0x00));
} else {
dest.writeByte((byte) (0x01));
dest.writeList(sub_categories);
}
}
@SuppressWarnings("unused")
public static final Parcelable.Creator<PCategoryData> CREATOR = new Parcelable.Creator<PCategoryData>() {
@Override
public PCategoryData createFromParcel(Parcel in) {
return new PCategoryData(in);
}
@Override
public PCategoryData[] newArray(int size) {
return new PCategoryData[size];
}
};
}
答案 0 :(得分：0)
我猜PCategoryData有双字段，并猜测该双字段的json值为＆＃34;＆＃34;;
<强>更新
您的代码将是这样的：
public class CitiesListFragment extends Fragment {
...
private void requestData(String uri) {
...
final GsonBuilder gsonBuilder = new GsonBuilder();
gsonBuilder.registerTypeAdapter(PCategoryData.class, new PCategoryDataTypeAdapter());
final Gson gson = gsonBuilder.create();
Type listType = new TypeToken<List<PCityData>>() {
}.getType();
//String data="";
pCityDataList = gson.fromJson(response.getString("Data"), listType);
...
}
...
class PCategoryDataTypeAdapter extends TypeAdapter<PCategoryData> {
@Override
public PCategoryData read(JsonReader in) throws IOException {
final PCategoryData data = new PCategoryData();
in.beginObject();
while (in.hasNext()) {
switch (in.nextName()) {
case "value": //Please change "value" to your field name.
try {
data.value = Double.valueOf(in.nextString());
} catch (NumberFormatException e) {
data.value = 0;
}
break;
}
}
in.endObject();
return data;
}
@Override
public void write(JsonWriter out, PCategoryData data) throws IOException {
out.beginObject();
out.name("value").value(data.value); //Please change "value" to your field name.
out.endObject();
}
}
...
}