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Asked: 2026-06-15T19:27:42+00:00

I need to pass a custom Parcelable object to another activity as Extra I

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I need to pass a custom Parcelable object to another activity as Extra

I put the extra with this code

Car myCarObject=getCar();
ArrayList<Car> parcelableExtra = new ArrayList<Car>();
                parcelableExtra.add(myCarObject);

Intent details = new Intent(Start.this, DetailsCar.class);
                details.putExtra("Car", parcelableExtra);
                startActivity(details);

I try to load the extra with this code in the destination Intent

ArrayList<Car> parcelableExtra = new ArrayList<Car>();
        parcelableExtra = (ArrayList<Car>) getIntent().getExtras().getParcelable("Car");
        Car c=parcelableExtra.get(0);

But the app crashes with this error stack:

12-14 03:34:24.059: E/AndroidRuntime(16872): FATAL EXCEPTION: main
12-14 03:34:24.059: E/AndroidRuntime(16872): java.lang.RuntimeException: Unable to start activity ComponentInfo{my.app.com/my.app.com.DetailsCar}: java.lang.RuntimeException: Parcel android.os.Parcel@4051ac20: Unmarshalling unknown type code 5505097 at offset 3144
12-14 03:34:24.059: E/AndroidRuntime(16872):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1651)
12-14 03:34:24.059: E/AndroidRuntime(16872):    at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:1667)
12-14 03:34:24.059: E/AndroidRuntime(16872):    at android.app.ActivityThread.access$1500(ActivityThread.java:117)
12-14 03:34:24.059: E/AndroidRuntime(16872):    at android.app.ActivityThread$H.handleMessage(ActivityThread.java:935)
12-14 03:34:24.059: E/AndroidRuntime(16872):    at android.os.Handler.dispatchMessage(Handler.java:99)
12-14 03:34:24.059: E/AndroidRuntime(16872):    at android.os.Looper.loop(Looper.java:130)
12-14 03:34:24.059: E/AndroidRuntime(16872):    at android.app.ActivityThread.main(ActivityThread.java:3687)
12-14 03:34:24.059: E/AndroidRuntime(16872):    at java.lang.reflect.Method.invokeNative(Native Method)
12-14 03:34:24.059: E/AndroidRuntime(16872):    at java.lang.reflect.Method.invoke(Method.java:507)
12-14 03:34:24.059: E/AndroidRuntime(16872):    at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:867)
12-14 03:34:24.059: E/AndroidRuntime(16872):    at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:625)
12-14 03:34:24.059: E/AndroidRuntime(16872):    at dalvik.system.NativeStart.main(Native Method)
12-14 03:34:24.059: E/AndroidRuntime(16872): Caused by: java.lang.RuntimeException: Parcel android.os.Parcel@4051ac20: Unmarshalling unknown type code 5505097 at offset 3144
12-14 03:34:24.059: E/AndroidRuntime(16872):    at android.os.Parcel.readValue(Parcel.java:1913)
12-14 03:34:24.059: E/AndroidRuntime(16872):    at android.os.Parcel.readListInternal(Parcel.java:2092)
12-14 03:34:24.059: E/AndroidRuntime(16872):    at android.os.Parcel.readArrayList(Parcel.java:1536)
12-14 03:34:24.059: E/AndroidRuntime(16872):    at my.app.com.obj.Car.<init>(Car.java:361)
12-14 03:34:24.059: E/AndroidRuntime(16872):    at my.app.com.obj.Car.<init>(Car.java:347)
12-14 03:34:24.059: E/AndroidRuntime(16872):    at my.app.com.obj.Car$1.createFromParcel(Car.java:339)
12-14 03:34:24.059: E/AndroidRuntime(16872):    at my.app.com.obj.Car$1.createFromParcel(Car.java:1)
12-14 03:34:24.059: E/AndroidRuntime(16872):    at android.os.Parcel.readParcelable(Parcel.java:1981)
12-14 03:34:24.059: E/AndroidRuntime(16872):    at android.os.Parcel.readValue(Parcel.java:1846)
12-14 03:34:24.059: E/AndroidRuntime(16872):    at android.os.Parcel.readListInternal(Parcel.java:2092)
12-14 03:34:24.059: E/AndroidRuntime(16872):    at android.os.Parcel.readArrayList(Parcel.java:1536)
12-14 03:34:24.059: E/AndroidRuntime(16872):    at android.os.Parcel.readValue(Parcel.java:1867)
12-14 03:34:24.059: E/AndroidRuntime(16872):    at android.os.Parcel.readMapInternal(Parcel.java:2083)
12-14 03:34:24.059: E/AndroidRuntime(16872):    at android.os.Bundle.unparcel(Bundle.java:208)
12-14 03:34:24.059: E/AndroidRuntime(16872):    at android.os.Bundle.getParcelable(Bundle.java:1100)
12-14 03:34:24.059: E/AndroidRuntime(16872):    at my.app.com.DetailsCar.onCreate(DetailsCar.java:43)
12-14 03:34:24.059: E/AndroidRuntime(16872):    at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1047)
12-14 03:34:24.059: E/AndroidRuntime(16872):    at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:1615)
12-14 03:34:24.059: E/AndroidRuntime(16872):    ... 11 more

My Parcelable Car Object is this

public class Car implements Serializable, Parcelable {
    String description;
    String speed;
    String brake;
    String pro;

    public Car(String description, String speed, String brake,
            String pro) {
        super();
        this.description = description;
        this.speed = speed;
        this.brake = brake;
        this.pro = pro;
    }

    public Car() {

    }

    @Override
    public int describeContents() {
        // TODO Auto-generated method stub
        return 0;
    }

    @Override
    public void writeToParcel(Parcel arg0, int arg1) {
        arg0.writeString(description);
        arg0.writeString(speed);
        arg0.writeString(brake);
        arg0.writeString(pro);
    }

    public static final Parcelable.Creator<Car> CREATOR = new Parcelable.Creator<Car>() {
        public Car createFromParcel(Parcel in) {
            return new Car(in);
        }

        public Car[] newArray(int size) {
            return new Car[size];
        }
    };

    private Car(Parcel in) {
        description = in.readString();
        speed = in.readString();
        brake = in.readString();
        pro = in.readString();
        in.readArrayList(String.class.getClassLoader());
    }

}

How could I fix this issue?
Any suggestion?

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1 Answer

  1. Editorial Team

    Let’s look at two key functions:

    @Override
public void writeToParcel(Parcel arg0, int arg1) {
    arg0.writeString(description);
    arg0.writeString(speed);
    arg0.writeString(brake);
    arg0.writeString(pro);
}


private Car(Parcel in) {
    description = in.readString();
    speed = in.readString();
    brake = in.readString();
    pro = in.readString();
    in.readArrayList(String.class.getClassLoader());
}

    Note that the first writes 4 variables to the Parcel, and the later reads 5. The system is crashing because there isn’t an ArrayList in the Parcel. Put an arrayList in, and you should be fine. Alternatively, you could just remove the read function, as it doesn’t even appear to be used (But I will allow for the possibility that more could be in your function than you included)

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