Parcelable在Fragment中写入可序列化对象时遇到IOException

Question

我在logcat中遇到这个异常：

Parcelable encountered IOException writing serializable object (name = com.user.ringersoft.vaccinedemo.DieseasModel)

VaccineFragment.java：

package com.user.ringersoft.vaccinedemo;
public class VaccineFragment extends Fragment{
RecyclerView recyclerView;
RequestQueue queue;
List<DieseasModel> dieseasModelList;
List<VaccineDetailsModel> vaccineDetailsModels;
public VaccineFragment() {
// Required empty public constructor
}

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
Bundle savedInstanceState) {
View view= inflater.inflate(R.layout.fragment_vaccine, container, false);
queue= Volley.newRequestQueue(getActivity().getApplicationContext());
recyclerView= view.findViewById(R.id.vaccine_recycler);
recyclerView.setHasFixedSize(true);
recyclerView.setLayoutManager(new LinearLayoutManager(getActivity().getApplicationContext()));

dieseasModelList = new ArrayList<>();

String url= "http://myselftinku27.000webhostapp.com/vaccine.php";
JsonObjectRequest jsonObjectRequest= new JsonObjectRequest(Request.Method.GET, url, new Response.Listener<JSONObject>() {
@Override
public void onResponse(JSONObject response) {
try {
JSONArray jsonArray= response.getJSONArray("server_response");
for (int i=0;i<jsonArray.length();i++)
{
vaccineDetailsModels=new ArrayList<>();
DieseasModel dieseasModel= new DieseasModel();
JSONObject jsonObject=jsonArray.getJSONObject(i);
Log.d("jsonTest",jsonObject.toString());
dieseasModel.setId(jsonObject.getString("id"));
dieseasModel.setdName(jsonObject.getString("d_name"));
dieseasModel.setDescription(jsonObject.getString("description"));
JSONArray vaccine= jsonObject.getJSONArray("vaccine");
for (int j=0;j<vaccine.length();j++)
{
VaccineDetailsModel vaccineDetailsModel=new VaccineDetailsModel();
Log.d("vaccineTest",vaccine.toString());
JSONObject vac=vaccine.getJSONObject(j);
//  Toast.makeText(getContext(),""+vac,Toast.LENGTH_LONG).show();
vaccineDetailsModel.setVaccine_name(vac.getString("vname"));
vaccineDetailsModel.setFirst(vac.getString("first"));
vaccineDetailsModel.setSecond(vac.getString("second"));
vaccineDetailsModel.setThird(vac.getString("third"));
vaccineDetailsModel.setFourth(vac.getString("fourth"));
vaccineDetailsModels.add(vaccineDetailsModel);
Log.d("dieases1",vaccineDetailsModel.getVaccine_name());
}
dieseasModel.setVaccineDetailsModels(vaccineDetailsModels);
Log.d("dieases",dieseasModel.toString());
dieseasModelList.add(dieseasModel);

}
FragmentManager fragmentManager=getFragmentManager();
VaccineAdapter adapter= new VaccineAdapter(getContext(),dieseasModelList,fragmentManager);
recyclerView.setAdapter(adapter);
} catch (JSONException e) {
e.printStackTrace();
}

}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
Log.d("error",error.toString());
}
});
queue.add(jsonObjectRequest);

return view;
}
}

DieseasModel.java：

public class DieseasModel implements Serializable {
private String id;
private String dName;
private String description;
List<VaccineDetailsModel> vaccineDetailsModels;
public DieseasModel(String id, String dName, String description,List<VaccineDetailsModel> vaccineDetailsModels) {

this.id = id;
this.dName = dName;
this.description=description;
this.vaccineDetailsModels = vaccineDetailsModels;
}
public DieseasModel() {
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getdName() {
return dName;
}
public void setdName(String dName) {
this.dName = dName;
}
public String getDescription() {
return description;
}
public void setDescription(String description) {
this.description = description;
}
public List<VaccineDetailsModel> getVaccineDetailsModels() {
return vaccineDetailsModels;
}
public void setVaccineDetailsModels(List<VaccineDetailsModel> vaccineDetailsModels) {
this.vaccineDetailsModels = vaccineDetailsModels;
}
}

疫苗详细信息Model.java：

package com.user.ringersoft.vaccinedemo;
public class VaccineDetailsModel {
String vaccine_name;
String first;
String second;
String third;
String fourth;
public VaccineDetailsModel() {
}
public VaccineDetailsModel(String vaccine_name, String first, String second, String third, String fourth) {
this.vaccine_name = vaccine_name;
this.first = first;
this.second = second;
this.third = third;
this.fourth = fourth;
}
public String getVaccine_name() {
return vaccine_name;
}
public void setVaccine_name(String vaccine_name) {
this.vaccine_name = vaccine_name;
}
public String getFirst() {
return first;
}
public void setFirst(String first) {
this.first = first;
}
public String getSecond() {
return second;
}
public void setSecond(String second) {
this.second = second;
}
public String getThird() {
return third;
}
public void setThird(String third) {
this.third = third;
}
public String getFourth() {
return fourth;
}
public void setFourth(String fourth) {
this.fourth = fourth;
}
}

这是我的日志：

java.lang.RuntimeException: Parcelable encountered IOException writing serializable object (name = com.user.ringersoft.vaccinedemo.DieseasModel)
at android.os.Parcel.writeSerializable(Parcel.java:1761)
at android.os.Parcel.writeValue(Parcel.java:1709)
at android.os.Parcel.writeArrayMapInternal(Parcel.java:777)
at android.os.BaseBundle.writeToParcelInner(BaseBundle.java:1506)
at android.os.Bundle.writeToParcel(Bundle.java:1181)
at android.os.Parcel.writeBundle(Parcel.java:817)
at android.support.v4.app.FragmentState.writeToParcel(FragmentState.java:124)
at android.os.Parcel.writeTypedArray(Parcel.java:1401)
at android.support.v4.app.FragmentManagerState.writeToParcel(FragmentManager.java:639)
at android.os.Parcel.writeParcelable(Parcel.java:1730)
at android.os.Parcel.writeValue(Parcel.java:1636)
at android.os.Parcel.writeArrayMapInternal(Parcel.java:777)
at android.os.BaseBundle.writeToParcelInner(BaseBundle.java:1506)
at android.os.Bundle.writeToParcel(Bundle.java:1181)
at android.app.IActivityManager$Stub$Proxy.activityStopped(IActivityManager.java:4617)
at android.app.ActivityThread$StopInfo.run(ActivityThread.java:3998)
at android.os.Handler.handleCallback(Handler.java:789)
at android.os.Handler.dispatchMessage(Handler.java:98)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6541)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767)
Caused by: java.io.NotSerializableException: com.user.ringersoft.vaccinedemo.VaccineDetailsModel
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1233)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:347)
at java.util.ArrayList.writeObject(ArrayList.java:762)
at java.lang.reflect.Method.invoke(Native Method)
at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:977)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1545)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1481)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1227)
at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1597)
at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1558)
at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1481)
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1227)
at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:347)
at android.os.Parcel.writeSerializable(Parcel.java:1756)
at android.os.Parcel.writeValue(Parcel.java:1709) 
at android.os.Parcel.writeArrayMapInternal(Parcel.java:777) 
at android.os.BaseBundle.writeToParcelInner(BaseBundle.java:1506) 
at android.os.Bundle.writeToParcel(Bundle.java:1181) 
at android.os.Parcel.writeBundle(Parcel.java:817) 
at android.support.v4.app.FragmentState.writeToParcel(FragmentState.java:124) 
at android.os.Parcel.writeTypedArray(Parcel.java:1401) 
at android.support.v4.app.FragmentManagerState.writeToParcel(FragmentManager.java:639) 
at android.os.Parcel.writeParcelable(Parcel.java:1730) 
at android.os.Parcel.writeValue(Parcel.java:1636) 
at android.os.Parcel.writeArrayMapInternal(Parcel.java:777) 
at android.os.BaseBundle.writeToParcelInner(BaseBundle.java:1506) 
at android.os.Bundle.writeToParcel(Bundle.java:1181) 
at android.app.IActivityManager$Stub$Proxy.activityStopped(IActivityManager.java:4617) 
at android.app.ActivityThread$StopInfo.run(ActivityThread.java:3998) 
at android.os.Handler.handleCallback(Handler.java:789) 
at android.os.Handler.dispatchMessage(Handler.java:98) 
at android.os.Looper.loop(Looper.java:164) 
at android.app.ActivityThread.main(ActivityThread.java:6541) 
at java.lang.reflect.Method.invoke(Native Method) 
at com.android.internal.os.Zygote$MethodAndArgsCaller.run(Zygote.java:240) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:767) 

Answer 1

您的VaccineDetailsModel必须实现为Serializable