当我不序列化任何内容时，Parcelable遇到了IOException编写可序列化对象的问题 [英] Parcelable encountered IOException writing serializable object when I don't serialize anything
问题描述
我有一个包含 MainActivity 的应用，该应用包含一个选项卡式视图，并为每个选项卡托管一个不同的片段.这种机制通过对FragmentPageAdapter进行扩展的SectionPageAdapter起作用.
I have an app that contains a MainActivity that contains a tabbed view and hosts a different fragment for each tab. This mechanism works trough a SectionPageAdapter that extends a FragmentPageAdapter.
其中一个标签会显示GeneralSearchFragment
One of the tabs brings out a GeneralSearchFragment
public class GeneralSearchFragment extends Fragment {
public GeneralSearchFragment(){
}
@Override
public View onCreateView(LayoutInflater inflater, @Nullable ViewGroup container, Bundle savedInstanceState) {
final ConstraintLayout constraintLayout = (ConstraintLayout) inflater.inflate(R.layout.fragment_searchtab, container, false);
((ImageView)constraintLayout.findViewById(R.id.searchByName)).setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View view) {
Intent intent = new Intent();
intent.setClass(getActivity(), FreeSearchActivity.class);
startActivity(intent);
}
});
return constraintLayout;
}
}
当我单击图像时，我的代码应启动另一个不同的活动.在我的代码中，我没有将任何东西传递给Activity，所以我不明白序列化错误来自何处.我唯一进行序列化的时间是当我通过一个捆绑包将一个项目列表传递给一个片段时.但是，这与这里发生的事情有何联系?
As I click on an image, my code should start another different Activity. In my code I don't pass anything to the Activity, so I don't understand where the serializing error is coming from. The only time I serialize something is when I pass a list of items to a fragment trough a bundle. But how is that connected to what is happening here ?
感谢一堆
顺便说一句，我理解logcat指出的问题，如果我实际上是想在这里序列化它.我唯一序列化该对象(实际上包含一个drawable)的时间是在另一个片段上，并且可以正常工作.它没有给我任何错误.可绘制的顺便说一句来自资源
Btw I understand the problem the logcat is pointing out if I was in fact trying to serialize it here. The only time I serialize that object ( that in fact contains a drawable ) is on another fragment and it works fine. It gives me no error. The drawable btw comes from resources
Logcat
12-26 08:17:52.853 5129-5129/com.chronocrops.chronocropps E/AndroidRuntime: FATAL EXCEPTION: main
Process: com.chronocrops.chronocropps, PID: 5129
java.lang.RuntimeException: Parcelable encountered IOException writing serializable object (name = com.chronocrops.chronocropps.Model.Crop)
at android.os.Parcel.writeSerializable(Parcel.java:1822)
at android.os.Parcel.writeValue(Parcel.java:1770)
at android.os.Parcel.writeList(Parcel.java:926)
at android.os.Parcel.writeValue(Parcel.java:1719)
at android.os.Parcel.writeArrayMapInternal(Parcel.java:838)
at android.os.BaseBundle.writeToParcelInner(BaseBundle.java:1542)
at android.os.Bundle.writeToParcel(Bundle.java:1232)
at android.os.Parcel.writeBundle(Parcel.java:878)
at android.support.v4.app.FragmentState.writeToParcel(Fragment.java:157)
at android.os.Parcel.writeTypedArray(Parcel.java:1462)
at android.support.v4.app.FragmentManagerState.writeToParcel(FragmentManager.java:617)
at android.os.Parcel.writeParcelable(Parcel.java:1791)
at android.os.Parcel.writeValue(Parcel.java:1697)
at android.os.Parcel.writeArrayMapInternal(Parcel.java:838)
at android.os.BaseBundle.writeToParcelInner(BaseBundle.java:1542)
at android.os.Bundle.writeToParcel(Bundle.java:1232)
at android.app.IActivityManager$Stub$Proxy.activityStopped(IActivityManager.java:4604)
at android.app.ActivityThread$StopInfo.run(ActivityThread.java:3934)
at android.os.Handler.handleCallback(Handler.java:790)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6494)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)
Caused by: java.io.NotSerializableException: android.graphics.drawable.BitmapDrawable
at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1233)
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:1817)
at android.os.Parcel.writeValue(Parcel.java:1770)
at android.os.Parcel.writeList(Parcel.java:926)
at android.os.Parcel.writeValue(Parcel.java:1719)
at android.os.Parcel.writeArrayMapInternal(Parcel.java:838)
at android.os.BaseBundle.writeToParcelInner(BaseBundle.java:1542)
at android.os.Bundle.writeToParcel(Bundle.java:1232)
at android.os.Parcel.writeBundle(Parcel.java:878)
at android.support.v4.app.FragmentState.writeToParcel(Fragment.java:157)
at android.os.Parcel.writeTypedArray(Parcel.java:1462)
at android.support.v4.app.FragmentManagerState.writeToParcel(FragmentManager.java:617)
at android.os.Parcel.writeParcelable(Parcel.java:1791)
at android.os.Parcel.writeValue(Parcel.java:1697)
at android.os.Parcel.writeArrayMapInternal(Parcel.java:838)
at android.os.BaseBundle.writeToParcelInner(BaseBundle.java:1542)
at android.os.Bundle.writeToParcel(Bundle.java:1232)
at android.app.IActivityManager$Stub$Proxy.activityStopped(IActivityManager.java:4604)
at android.app.ActivityThread$StopInfo.run(ActivityThread.java:3934)
at android.os.Handler.handleCallback(Handler.java:790)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:164)
at android.app.ActivityThread.main(ActivityThread.java:6494)
at java.lang.reflect.Method.invoke(Native Method)
at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:438)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:807)
/** * {@link FragmentPagerAdapter}返回与以下内容相对应的片段 *部分/标签/页面之一. */ 公共类SectionsPagerAdapter扩展FragmentPagerAdapter {
/** * A {@link FragmentPagerAdapter} that returns a fragment corresponding to * one of the sections/tabs/pages. */ public class SectionsPagerAdapter extends FragmentPagerAdapter {
public SectionsPagerAdapter(FragmentManager fm) {
super(fm);
}
// Mudar o retorno do getItem de acordo com a position
@Override
public Fragment getItem(int position) {
// getItem is called to instantiate the fragment for the given page.
if(position == 0){
return new CalendarFragment();
}else if(position == 1){
Bundle bundle = new Bundle();
bundle.putSerializable("crops",crops);
CropListFragment cropListFragment = new CropListFragment();
cropListFragment.setArguments(bundle);
return cropListFragment;
}else if(position == 2){
return new GeneralSearchFragment();
}
// Should'nt reach here
return null;
}
作物示例:
Crop abacaxi = new Crop("Harvest begins in 10th of June",
getResources().getDrawable(R.drawable.abacax1),
"Marvila",
"Ananas comosus");
作物对象
public class Crop implements Serializable {
private String specieHarvest;
private Drawable specieImage;
private String specieLocation;
private String specieName;
public Crop(String specieHarvest, Drawable specieImage, String specieLocation, String specieName) {
this.specieHarvest = specieHarvest;
this.specieImage = specieImage;
this.specieLocation = specieLocation;
this.specieName = specieName;
}
public String getSpecieHarvest() {
return specieHarvest;
}
public Drawable getSpecieImage() {
return specieImage;
}
public String getSpecieLocation() {
return specieLocation;
}
public String getSpecieName() {
return specieName;
}
}
推荐答案
所以我对这个问题有一个答案.该答案基于这篇文章给出的答案:
So I have an answer to the problem. This answers has base on the answers given on this post:
The answer is simple, as when passing objects as arguments to a Fragment will not cause it to be Marshled. This means it wouldn't be Serialized/Deserialized unless the Fragment is destroyed. And in this case he is destroyed when I try to start a new Activity. I tought Drawable was serializable cause I wasn't getting any errors while I was inside the Fragment, little did I know I was dealing with the same object (reference) itself.
这篇关于当我不序列化任何内容时，Parcelable遇到了IOException编写可序列化对象的问题的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
