所以我在logcat中得到这个:
java.lang.RuntimeException: Parcelable encountered IOException writing serializable object (name = com.resources.student_list.Student)
我知道这意味着我的学生班不是可序列化的,但是,这是我的学生班:
import java.io.Serializable;
public class Student implements Comparable<Student>, Serializable{
private static final long serialVersionUID = 1L;
private String firstName, lastName;
private DSLL<Grade> gradeList;
public Student() {
firstName = "";
lastName = "";
gradeList = new DSLL<Grade>();
}
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public DSLL<Grade> getGradeList() {
return gradeList;
}
public void setGradeList(DSLL<Grade> gradeList) {
this.gradeList = gradeList;
}
public int compareTo(Student arg0) {
return this.lastName.compareTo(arg0.getLastName());
}
}
这是使用getIntent()方法的代码:
public void onItemClick(AdapterView<?> parent, View viewClicked, int pos,
long id) {
Student clickedStudent = studentList.get(pos);
int position = pos;
Intent intent = new Intent(getActivity().getApplicationContext(), ShowStudentActivity.class);
Log.e("CINTENT","CREATED!!!");
intent.putExtra("clickedStudent",clickedStudent);
intent.putExtra("newStudentList",newStudentList);
intent.putExtra("position",position);
Log.e("putExtra","Passed");
Log.e("Start activity","passed");
startActivity(intent);
}
});
请帮我弄清楚这是怎么回事。
这是整个LogCat:
04-17 16:12:28.890: E/AndroidRuntime(22815): FATAL EXCEPTION: main
04-17 16:12:28.890: E/AndroidRuntime(22815): java.lang.RuntimeException: Parcelable encountered IOException writing serializable object (name = com.resources.student_list.Student)
04-17 16:12:28.890: E/AndroidRuntime(22815): at android.os.Parcel.writeSerializable(Parcel.java:1181)
04-17 16:12:28.890: E/AndroidRuntime(22815): at android.os.Parcel.writeValue(Parcel.java:1135)
04-17 16:12:28.890: E/AndroidRuntime(22815): at android.os.Parcel.writeMapInternal(Parcel.java:493)
04-17 16:12:28.890: E/AndroidRuntime(22815): at android.os.Bundle.writeToParcel(Bundle.java:1612)
04-17 16:12:28.890: E/AndroidRuntime(22815): at android.os.Parcel.writeBundle(Parcel.java:507)
04-17 16:12:28.890: E/AndroidRuntime(22815): at android.content.Intent.writeToParcel(Intent.java:6111)
04-17 16:12:28.890: E/AndroidRuntime(22815): at android.app.ActivityManagerProxy.startActivity(ActivityManagerNative.java:1613)
04-17 16:12:28.890: E/AndroidRuntime(22815): at android.app.Instrumentation.execStartActivity(Instrumentation.java:1422)
04-17 16:12:28.890: E/AndroidRuntime(22815): at android.app.Activity.startActivityForResult(Activity.java:3191)
04-17 16:12:28.890: E/AndroidRuntime(22815): at android.support.v4.app.FragmentActivity.startActivityFromFragment(FragmentActivity.java:848)
04-17 16:12:28.890: E/AndroidRuntime(22815): at android.support.v4.app.Fragment.startActivity(Fragment.java:878)
04-17 16:12:28.890: E/AndroidRuntime(22815): at com.example.student_lists.MainActivity$DummySectionFragment$2.onItemClick(MainActivity.java:477)
04-17 16:12:28.890: E/AndroidRuntime(22815): at android.widget.AdapterView.performItemClick(AdapterView.java:292)
04-17 16:12:28.890: E/AndroidRuntime(22815): at android.widget.AbsListView.performItemClick(AbsListView.java:1058)
04-17 16:12:28.890: E/AndroidRuntime(22815): at android.widget.AbsListView$PerformClick.run(AbsListView.java:2514)
04-17 16:12:28.890: E/AndroidRuntime(22815): at android.widget.AbsListView$1.run(AbsListView.java:3168)
04-17 16:12:28.890: E/AndroidRuntime(22815): at android.os.Handler.handleCallback(Handler.java:605)
04-17 16:12:28.890: E/AndroidRuntime(22815): at android.os.Handler.dispatchMessage(Handler.java:92)
04-17 16:12:28.890: E/AndroidRuntime(22815): at android.os.Looper.loop(Looper.java:137)
04-17 16:12:28.890: E/AndroidRuntime(22815): at android.app.ActivityThread.main(ActivityThread.java:4447)
04-17 16:12:28.890: E/AndroidRuntime(22815): at java.lang.reflect.Method.invokeNative(Native Method)
04-17 16:12:28.890: E/AndroidRuntime(22815): at java.lang.reflect.Method.invoke(Method.java:511)
04-17 16:12:28.890: E/AndroidRuntime(22815): at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:784)
04-17 16:12:28.890: E/AndroidRuntime(22815): at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:551)
04-17 16:12:28.890: E/AndroidRuntime(22815): at dalvik.system.NativeStart.main(Native Method)
04-17 16:12:28.890: E/AndroidRuntime(22815): Caused by: java.io.NotSerializableException: com.resources.student_list.DSLL$DNode
04-17 16:12:28.890: E/AndroidRuntime(22815): at java.io.ObjectOutputStream.writeNewObject(ObjectOutputStream.java:1364)
04-17 16:12:28.890: E/AndroidRuntime(22815): at java.io.ObjectOutputStream.writeObjectInternal(ObjectOutputStream.java:1671)
04-17 16:12:28.890: E/AndroidRuntime(22815): at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1517)
04-17 16:12:28.890: E/AndroidRuntime(22815): at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1481)
04-17 16:12:28.890: E/AndroidRuntime(22815): at java.io.ObjectOutputStream.writeFieldValues(ObjectOutputStream.java:979)
04-17 16:12:28.890: E/AndroidRuntime(22815): at java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:368)
04-17 16:12:28.890: E/AndroidRuntime(22815): at java.io.ObjectOutputStream.writeHierarchy(ObjectOutputStream.java:1074)
04-17 16:12:28.890: E/AndroidRuntime(22815): at java.io.ObjectOutputStream.writeNewObject(ObjectOutputStream.java:1404)
04-17 16:12:28.890: E/AndroidRuntime(22815): at java.io.ObjectOutputStream.writeObjectInternal(ObjectOutputStream.java:1671)
04-17 16:12:28.890: E/AndroidRuntime(22815): at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1517)
04-17 16:12:28.890: E/AndroidRuntime(22815): at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1481)
04-17 16:12:28.890: E/AndroidRuntime(22815): at java.io.ObjectOutputStream.writeFieldValues(ObjectOutputStream.java:979)
04-17 16:12:28.890: E/AndroidRuntime(22815): at java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:368)
04-17 16:12:28.890: E/AndroidRuntime(22815): at java.io.ObjectOutputStream.writeHierarchy(ObjectOutputStream.java:1074)
04-17 16:12:28.890: E/AndroidRuntime(22815): at java.io.ObjectOutputStream.writeNewObject(ObjectOutputStream.java:1404)
04-17 16:12:28.890: E/AndroidRuntime(22815): at java.io.ObjectOutputStream.writeObjectInternal(ObjectOutputStream.java:1671)
04-17 16:12:28.890: E/AndroidRuntime(22815): at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1517)
04-17 16:12:28.890: E/AndroidRuntime(22815): at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:1481)
04-17 16:12:28.890: E/AndroidRuntime(22815): at android.os.Parcel.writeSerializable(Parcel.java:1176)
Caused by: java.io.NotSerializableException: com.resources.student_list.DSLL$DNode
你的DSLL
类似乎有一个DNode
静态内部类,而DNode
不是Serializable
。
发生异常的原因是任何内部类或其他引用的类都不实现可序列化。因此,使所有引用的类实现可序列化。
我面临同样的问题,问题是有一些内部类与static关键字。删除静态关键字后,它开始工作,内部类应该实现到Serializable
class A implements Serializable{
class static B{
}
}
class A implements Serializable{
class B implements Serializable{
}
}
您的OneThread类也应该实现Serializable。所有子类和内部子类都必须实现Serializable。
这对我有用......
如果你不能使DNode序列化,一个好的解决方案是为变量添加“瞬态”。
例:
public static transient DNode dNode = null;
这将在使用Intent.putExtra(...)时忽略该变量。
对我来说,这是通过使类内的变量瞬态来解决的。
代号:
public class UserLocation implements Serializable {
public Location lastKnownLocation;
public UserLocation() {}
}
代码之后
public class UserLocation implements Serializable {
public transient Location lastKnownLocation;
public UserLocation() {}
}
如果你POJO包含任何其他模型,也应该实现Serializable
当您的自定义类具有某些其他类的属性时,会发生此问题,例如“位图”。我所做的是将属性字段从“私有位图照片”更改为“私有瞬态位图照片”。但是,在接收器活动中的getIntent()之后,图像为空。因此,我将自定义类传递给intent,并且我还从图像中创建了一个字节数组,并将其分别传递给intent:
selectedItem是我的自定义对象,getPlacePhoto是获取图像的方法。我之前已经设置了它,现在我先得到它而不是转换它并分开传递它:
Bitmap image = selectedItem.getPlacePhoto();
image.compress(Bitmap.CompressFormat.PNG, 100, stream);
byte[] byteArray = stream.toByteArray();
Intent intent = new Intent(YourPresentActivity.this,
TheReceiverActivity.class);
intent.putExtra("selectedItem", selectedItem);
intent.putExtra("image", byteArray);
startActivity(intent);
`
然后在接收器活动中,我将对象和图像作为字节数组,解码图像并将其设置为我的对象作为照片属性。
Intent intent = getIntent();
selectedItem = (ListItem) intent.getSerializableExtra("selectedItem");
byte[] byteArray = getIntent().getByteArrayExtra("image");
Bitmap image = BitmapFactory.decodeByteArray(byteArray, 0,
byteArray.length);
selectedItem.setPhoto(image);
我也是阶段这些错误,我在modelClass中有点改变,它实现了Serializable接口,如:
在该Model类中,还使用writeToParcel()覆盖方法实现Parcelable接口
然后只是错误“创建创建者”,所以CREATOR写,并使用带有参数和无参数的modelclass构造函数创建。
@Override
public void writeToParcel(Parcel dest, int flags) {
dest.writeString(id);
dest.writeString(name);
}
protected ArtistTrackClass(Parcel in) {
id = in.readString();
name = in.readString();
}
public ArtistTrackClass() {
}
public static final Creator<ArtistTrackClass> CREATOR = new Creator<ArtistTrackClass>() {
@Override
public ArtistTrackClass createFromParcel(Parcel in) {
return new ArtistTrackClass(in);
}
@Override
public ArtistTrackClass[] newArray(int size) {
return new ArtistTrackClass[size];
}
};
这里,
ArtistTrackClass - > ModelClass
包含参数的构造函数“读取我们的属性”,而writeToParcel()是“编写我们的属性”
Grade类还必须实现Serializable
public class Grade implements Serializable {
.....your content....
}
需要在bean类中将所有arraylist更改为Serializable wif:
public static class PremiumListBean implements Serializable {
private List<AddOnValueBean> AddOnValue;
public List<AddOnValueBean> getAddOnValue() {
return AddOnValue;
}
public void setAddOnValue(List<AddOnValueBean> AddOnValue) {
this.AddOnValue = AddOnValue;
}
public static class AddOnValueBean implements Serializable{
@SerializedName("Premium")
private String Premium;
public String getPremium() {
return Premium;
}
public void setPremium(String Premium) {
this.Premium = Premium;
}
}
}