我希望我能立刻给这个问题一个赏金,我已被这个问题阻止了一天多。
情况有点复杂:
我试图使用intent的附加功能将ArrayList从一个活动发送到另一个活动。如果我把它放在意图后直接调试代码,它似乎没问题:
如果您查看手表,您可以看到意图已正确填充。
如果ArrayList只包含1个对象,那么一切都会解决,但如果它包含多个对象则不行。然后我得到以下错误:
Caused by: java.lang.RuntimeException: Parcel android.os.Parcel@2133e0d8: Unmarshalling unknown type code 6619168 at offset 392
at android.os.Parcel.readValue(Parcel.java:2032)
at android.os.Parcel.readListInternal(Parcel.java:2235)
at android.os.Parcel.readArrayList(Parcel.java:1655)
at android.os.Parcel.readValue(Parcel.java:1986)
at android.os.Parcel.readMapInternal(Parcel.java:2226)
at android.os.Bundle.unparcel(Bundle.java:223)
at android.os.Bundle.getParcelableArrayList(Bundle.java:1217)
at android.content.Intent.getParcelableArrayListExtra(Intent.java:4798)
at nl.raakict.android.spc.SearchMapActivity.onCreate(SearchMapActivity.java:85)
at android.app.Activity.performCreate(Activity.java:5267)
at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1097)
at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:2209)
at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:2295)
at android.app.ActivityThread.access$700(ActivityThread.java:150)
at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1280)
at android.os.Handler.dispatchMessage(Handler.java:99)
at android.os.Looper.loop(Looper.java:176)
at android.app.ActivityThread.main(ActivityThread.java:5279)
at java.lang.reflect.Method.invokeNative(Native Method)
at java.lang.reflect.Method.invoke(Method.java:511)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1102)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:869)
at dalvik.system.NativeStart.main(Native Method)
我添加了对象的代码(和sibbling对象)。请注意,这里有一个吸引人的位,我还有一个实现Parcellable的抽象类:
class OrderLine:
package nl.raakict.android.spc.Model;
import android.os.Parcel;
import android.os.Parcelable;
import nl.raakict.android.spc.Interface.RenewOrderLinesListener;
import nl.raakict.android.spc.Interface.onApiCompleteListener;
import java.util.ArrayList;
import java.util.List;
public class OrderLine extends BaseModel implements onApiCompleteListener, Parcelable {
private int ID;
private int OrderID;
private String Order_Number;
private String PartName;
private String Materiaal;
private double Thickness;
private double XSize;
private double YSize;
private int Amount;
private String ImagePath;
private String PositionNumber;
private double Weight;
private String Remark;
private String BonNumber;
private int ParentOrderLineID;
private String ParentAssemblyName;
private String Barcode;
private ArrayList<OrderLineOperation> OrderLineOperations;
private ArrayList<OrderLineLocation> ActiveOrderLineLocations;
private String StatusColor;
private boolean Completed;
private long LocationID;
private int CustomerID;
private String CustomerName;
private OrderLineOperation CurrentOperation;
private boolean IsTransportReady;
private String PlanningLocation;
private transient RenewOrderLinesListener apiCompleteListener;
public OrderLine(){
ActiveOrderLineLocations = new ArrayList<OrderLineLocation>();
}
// Getters, setters, derived methods of onApiCompleteListener
@Override
public int describeContents() {
return 0;
}
@Override
public void writeToParcel(Parcel dest, int flags) {
dest.writeInt(getID());
dest.writeString(getPartName());
dest.writeInt(OrderID);
dest.writeString(Order_Number);
if(ActiveOrderLineLocations == null || ActiveOrderLineLocations.isEmpty())
dest.writeByte((byte) 0);
else {
dest.writeByte((byte) 1);
dest.writeTypedList(ActiveOrderLineLocations);
}
}
public OrderLine(Parcel in) {
this();
ID = in.readInt();
PartName = in.readString();
OrderID = in.readInt();
Order_Number = in.readString();
if(in.readByte() == (byte)1)
in.readTypedList(ActiveOrderLineLocations, OrderLineLocation.CREATOR);
}
/**
* * This field is needed for Android to be able to * create new objects, individually or as arrays. * * This also means that you can use use the default * constructor to create the object and use another * method to hyrdate it as necessary. * * I just find it easier to use the constructor. * It makes sense for the way my brain thinks ;-) *
*/
public static final Parcelable.Creator CREATOR = new Parcelable.Creator() {
public OrderLine createFromParcel(Parcel in) {
return new OrderLine(in);
}
public OrderLine[] newArray(int size) {
return new OrderLine[size];
}
};
public ArrayList<OrderLineLocation> getActiveOrderLineLocations() {
return ActiveOrderLineLocations;
}
public void setActiveOrderLineLocations(ArrayList<OrderLineLocation> activeOrderLineLocations) {
ActiveOrderLineLocations = activeOrderLineLocations;
}
}
class OrderLineLocation:
package nl.raakict.android.spc.Model;
import android.os.Parcel;
import android.os.Parcelable;
public class OrderLineLocation extends BaseModel implements Parcelable {
private int ID;
private OrderLine OrderLine;
private int OrderLineID;
private int CurrentAmount;
private LocationBase Location;
private String DateChanged;
private long UserID;
private boolean Archive;
private boolean IsOnStockLocation;
private String SupplierID;
private long LocationID;
@Override
public int describeContents() {
return 0;
}
@Override
public void writeToParcel(Parcel dest, int flags) {
dest.writeInt(this.ID);
if (this.OrderLine != null) {
dest.writeByte((byte) 1);
dest.writeParcelable(this.OrderLine, 0);
} else
dest.writeByte((byte) 0);
if (this.Location != null) {
dest.writeByte((byte) 1);
dest.writeParcelable(this.Location, 0);
} else
dest.writeByte((byte) 0);
if (this.Location != null)
dest.writeInt(this.OrderLineID);
dest.writeInt(this.CurrentAmount);
dest.writeString(this.DateChanged);
dest.writeLong(this.UserID);
dest.writeByte(Archive ? (byte) 1 : (byte) 0);
dest.writeByte(IsOnStockLocation ? (byte) 1 : (byte) 0);
dest.writeString(this.SupplierID);
}
public OrderLineLocation() {
}
private OrderLineLocation(Parcel in) {
this.ID = in.readInt();
if (in.readByte() == (byte) 1)
this.OrderLine = in.readParcelable(nl.raakict.android.spc.Model.OrderLine.class.getClassLoader());
if (in.readByte() == (byte) 1)
this.Location = in.readParcelable(nl.raakict.android.spc.Model.LocationBase.class.getClassLoader());
this.OrderLineID = in.readInt();
this.CurrentAmount = in.readInt();
this.DateChanged = in.readString();
this.UserID = in.readLong();
this.Archive = in.readByte() != (byte) 0;
this.IsOnStockLocation = in.readByte() != (byte) 0;
this.SupplierID = in.readString();
}
public static final Parcelable.Creator<OrderLineLocation> CREATOR = new Parcelable.Creator<OrderLineLocation>() {
public OrderLineLocation createFromParcel(Parcel source) {
return new OrderLineLocation(source);
}
public OrderLineLocation[] newArray(int size) {
return new OrderLineLocation[size];
}
};
}
类LocationBase(抽象类):
package nl.raakict.android.spc.Model;
import android.os.Parcel;
import android.os.Parcelable;
import java.util.ArrayList;
public abstract class LocationBase extends BaseModel implements Parcelable {
protected String __type;
protected long Id;
protected String Name;
protected String Barcode;
protected String Remark;
protected int Discriminator;
protected int AmountOfSegments;
protected ArrayList<Carrier> Carriers;
protected ArrayList<OrderLineLocation> OrderLineLocations;
protected ArrayList<Order_Header> Orders;
protected LocationBase Location;
protected ArrayList<OrderLineLocation> ActiveLocations;
@Override
public int describeContents() {
return 0;
}
@Override
public void writeToParcel(Parcel dest, int flags) {
dest.writeString(this.__type);
dest.writeLong(this.Id);
dest.writeString(this.Name);
dest.writeString(this.Barcode);
dest.writeString(this.Remark);
dest.writeInt(this.Discriminator);
dest.writeInt(this.AmountOfSegments);
if(this.ActiveLocations == null || this.ActiveLocations.isEmpty())
dest.writeByte((byte) 0);
else {
dest.writeByte((byte) 1);
dest.writeTypedList(this.ActiveLocations);
}
if(this.Orders == null || this.Orders.isEmpty())
dest.writeByte((byte) 0);
else {
dest.writeByte((byte) 1);
dest.writeTypedList(this.Orders);
}
}
public LocationBase() {
}
public static final Parcelable.Creator<LocationBase> CREATOR = new Parcelable.Creator<LocationBase>() {
public LocationBase createFromParcel(Parcel source) {
Byte b = source.readByte();
if(b == 0)
return nl.raakict.android.spc.Model.Carrier.CREATOR.createFromParcel(source);
else
return nl.raakict.android.spc.Model.Location.CREATOR.createFromParcel(source);
}
public LocationBase[] newArray(int size) {
return new LocationBase[size];
}
};
}
和Carrier(实现LocationBase抽象类)
package nl.raakict.android.spc.Model;
import android.os.Parcel;
import android.os.Parcelable;
public class Carrier extends LocationBase {
private int LocationID;
private int CarrierTypeID;
private boolean CanBePlacedOnCarrier;
private boolean CanBeCarrierLocation;
protected int StartSegment;
private String CarrierTypeName;
private int NumberOfEdges;
private transient int Indentation;
public Carrier() {
}
@Override
public void writeToParcel(Parcel dest, int flags) {
dest.writeByte((byte) 0);
super.writeToParcel(dest, flags);
if (this.Location != null) {
dest.writeByte((byte) 1);
dest.writeParcelable(this.Location, 0);
} else
dest.writeByte((byte) 0);
}
protected Carrier(Parcel in) {
this.__type = in.readString();
this.Id = in.readLong();
this.Name = in.readString();
this.Barcode = in.readString();
this.Remark = in.readString();
this.Discriminator = in.readInt();
this.AmountOfSegments = in.readInt();
if(in.readByte() == (byte)1)
in.readTypedList(ActiveLocations, OrderLineLocation.CREATOR);
if(in.readByte() == (byte)1)
in.readTypedList(Orders, Order_Header.CREATOR);
if (in.readByte() == (byte) 1)
this.Location = in.readParcelable(nl.raakict.android.spc.Model.LocationBase.class.getClassLoader());
}
public static final Parcelable.Creator<LocationBase> CREATOR = new Parcelable.Creator<LocationBase>() {
public Carrier createFromParcel(Parcel in) {
return new Carrier(in);
}
public Carrier[] newArray(int size) {
return new Carrier[size];
}
};
}
最后是班级位置
package nl.raakict.android.spc.Model;
import android.os.Parcel;
import android.os.Parcelable;
public class Location extends LocationBase {
protected int LocationGroupID;
protected int PositionZ;
public Location() {
}
protected Location(Parcel in) {
this.__type = in.readString();
this.Id = in.readLong();
this.Name = in.readString();
this.Barcode = in.readString();
this.Remark = in.readString();
this.Discriminator = in.readInt();
this.AmountOfSegments = in.readInt();
if(in.readByte() == (byte)1)
in.readTypedList(ActiveLocations, OrderLineLocation.CREATOR);
}
@Override
public void writeToParcel(Parcel dest, int flags) {
dest.writeByte((byte) 1);
super.writeToParcel(dest, flags);
}
public static final Parcelable.Creator<LocationBase> CREATOR = new Parcelable.Creator<LocationBase>() {
public Location createFromParcel(Parcel source) {
return new Location(source);
}
public Location[] newArray(int size) {
return new Location[size];
}
};
}
答案 0 :(得分:1)
在OrderLineLocation.writeToParcel
中,OrderLineID
仅在Location != null
时才会被写入。
但是,在OrderLineLocation(Parcel in)
中读取时,readInt()
始终会OrderLineID
调用{无条件},因此可能导致读取和写入序列之间的偏移不匹配。
答案 1 :(得分:0)
为了避免空引用,您必须进行大量空验证才能处理List<?>
和Parcelable
。我建议你忽略这个,如果它是null,把它放在Parcel
。