我需要将自定义Parcelable对象作为Extra
传递给另一个活动我把额外的代码加上
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);
我尝试在目标Intent
中加载此代码的额外内容ArrayList<Car> parcelableExtra = new ArrayList<Car>();
parcelableExtra = (ArrayList<Car>) getIntent().getExtras().getParcelable("Car");
Car c=parcelableExtra.get(0);
但应用程序崩溃了这个错误堆栈：
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
我的Parcelable Car Object就是这个
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());
}
}
我该如何解决这个问题？ 有什么建议吗？
答案 0 :(得分：2)
让我们看看两个关键功能：
@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());
}
请注意，第一个将4个变量写入Parcel，后者读取5个。系统崩溃，因为Parcel中没有ArrayList。把一个arrayList放进去，你应该没问题。或者，您可以删除读取功能，因为它甚至似乎没有被使用（但我会考虑更多可能在您的功能中可能比您包括的更多）