Serializable parcelable issue: RuntimeException: Parcelable encountered IOException writing serializable object
伙计们，我有最简单的类，我想成为Parcelable。我是这样做的：
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 | public class MyField implements Serializable, Parcelable { public MyField() { } //************************************************ // Parcelable methods //************************************************ public int describeContents() {return 0; }; public void writeToParcel(Parcel out, int flags) { out.writeInt(this.describeContents()); out.writeSerializable(this); } @SuppressWarnings("redundant") public Parcelable.Creator<MyField> CREATOR = new Parcelable.Creator<MyField>() { public MyField createFromParcel(Parcel in) { int description=in.readInt(); Serializable s=in.readSerializable(); switch(description) { case 0: return (MyField )s; default: return null; } } public MyField[] newArray(int size) { return new MyField[size]; } }; } |
简单，哈？是的，看起来像。但当我尝试将类对象作为包对象发送到另一个活动时，例如：
1 2 3 4 | intent=new Intent(activity, SendMessageActivity.class); MyField fld=new MyField(); intent.putExtra("to", (Parcelable )fld); activity.startActivity(intent); |
号
我有以下例外：
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 | java.lang.RuntimeException: Parcelable encountered IOException writing serializable object (name = ru.ivanovpv.android.storage.MyField) at android.os.Parcel.writeSerializable(Parcel.java:1131) at ru.ivanovpv.android.storage.MyField.writeToParcel(MyField.java:58) at android.os.Parcel.writeParcelable(Parcel.java:1106) at android.os.Parcel.writeValue(Parcel.java:1029) at android.os.Parcel.writeMapInternal(Parcel.java:469) at android.os.Bundle.writeToParcel(Bundle.java:1445) at android.os.Parcel.writeBundle(Parcel.java:483) at android.content.Intent.writeToParcel(Intent.java:5237) at android.app.ActivityManagerProxy.startActivity(ActivityManagerNative.java:1204) at android.app.Instrumentation.execStartActivity(Instrumentation.java:1373) at android.app.Activity.startActivityForResult(Activity.java:2749) at android.app.Activity.startActivity(Activity.java:2855) at ru.ivanovpv.android.storage.BulkContact.doContextItemSelected(BulkContact.java:105) at ru.ivanovpv.android.cellmessenger.ContactsActivity.onContextItemSelected(ContactsActivity.java:188) at android.app.Activity.onMenuItemSelected(Activity.java:2174) at com.android.internal.policy.impl.PhoneWindow$ContextMenuCallback.onMenuItemSelected(PhoneWindow.java:2731) at com.android.internal.view.menu.MenuItemImpl.invoke(MenuItemImpl.java:139) at com.android.internal.view.menu.MenuBuilder.performItemAction(MenuBuilder.java:855) at com.android.internal.view.menu.MenuDialogHelper.onClick(MenuDialogHelper.java:129) at com.android.internal.app.AlertController$AlertParams$3.onItemClick(AlertController.java:884) at android.widget.AdapterView.performItemClick(AdapterView.java:284) at android.widget.ListView.performItemClick(ListView.java:3285) at android.widget.AbsListView$PerformClick.run(AbsListView.java:1640) at android.os.Handler.handleCallback(Handler.java:587) at android.os.Handler.dispatchMessage(Handler.java:92) at android.os.Looper.loop(Looper.java:123) at android.app.ActivityThread.main(ActivityThread.java:4363) at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:521) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:860) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:618) at dalvik.system.NativeStart.main(Native Method) Caused by: java.io.NotSerializableException: ru.ivanovpv.android.storage.MyField$1 at java.io.ObjectOutputStream.writeNewObject(ObjectOutputStream.java:1547) at java.io.ObjectOutputStream.writeObjectInternal(ObjectOutputStream.java:1854) at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1696) at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1660) at java.io.ObjectOutputStream.writeFieldValues(ObjectOutputStream.java:1153) at java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:420) at java.io.ObjectOutputStream.writeHierarchy(ObjectOutputStream.java:1251) at java.io.ObjectOutputStream.writeNewObject(ObjectOutputStream.java:1587) at java.io.ObjectOutputStream.writeObjectInternal(ObjectOutputStream.java:1854) at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1696) at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1660) at android.os.Parcel.writeSerializable(Parcel.java:1126) ... 31 more |
真的不明白这里有什么是不可销售的？
一切都很简单：parcelable实现中的"creator"应该是"public static final"字段，而不仅仅是"public"。
通过只将"创建者"字段"公开"，您可以使它成为MyField类的成员。因为"创建者"不是"可序列化的"——所以当系统试图序列化MyField类的所有成员时，您会遇到崩溃。
我想问题是你把