解组 Parcelable 时出现 ClassNotFoundException

发布于 2024-11-15 02:55:29 字数 955 浏览 9 评论 0原文

我在解析 Intent 上的 Parcelable 时遇到问题。

来创建 Parcelable

Intent data = new Intent();
data.putExtra(ShoppingListAdapter.parcelName, la);
setResult(Activity.RESULT_OK, data);

我使用在 onActivityResult 中接收它

Parcelable myData = data.getParcelableExtra(ShoppingListAdapter.parcelName);

：然后使用它将其传递给另一个 Activity：

Intent myIntent = new Intent(this,Class.class);
myIntent.putExtra("myData", myData);
startActivityForResult(myIntent, RESULT);

我的 Parcelable 有另一个 Parcelable，我在其中写入和读取 uisng：

list = in.readParcelable(null);

我尝试使用不同的类加载器，从 ClassLoader.getSystemLoader() 到 MyClass.class .getClassLoader() 但我仍然收到运行时异常：

06-12 21:13:04.940: ERROR/AndroidRuntime(29962): Caused by: android.os.BadParcelableException: ClassNotFoundException when unmarshalling:

我的包裹在此之前的某个地方是否已损坏，或者我读错了？

亚历克斯

原文

I have a problem with parsing a Parcelable across an Intent.

I create parcelable using

Intent data = new Intent();
data.putExtra(ShoppingListAdapter.parcelName, la);
setResult(Activity.RESULT_OK, data);

I receive it in the onActivityResult:

Parcelable myData = data.getParcelableExtra(ShoppingListAdapter.parcelName);

Then pass it to another Activity using:

Intent myIntent = new Intent(this,Class.class);
myIntent.putExtra("myData", myData);
startActivityForResult(myIntent, RESULT);

My Parcelable has another Parcelable inside which I write and read uisng:

list = in.readParcelable(null);

I have tried using different class loaders, from ClassLoader.getSystemLoader() to MyClass.class.getClassLoader() but still I get a Runtime Exception:

06-12 21:13:04.940: ERROR/AndroidRuntime(29962): Caused by: android.os.BadParcelableException: ClassNotFoundException when unmarshalling:

Is my Parcel corrupted somewhere before this or am I reading it wrong?

Alex

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醉梦枕江山 2024-11-22 02:55:29

我也遇到了这个问题，这是一个愚蠢的事情。 writeToParcel 和 readToParcel 方法的顺序和数量应该相同并且具有相同的变量。

我的意思是：

public void writeToParcel(Parcel dest, int flags) {
   dest.writeString(title);
   dest.writeParcelable((Parcelable)this.getLocation(), flags);
   dest.writeString(value);  
}

必须与以下顺序相同：

private void readFromParcel(Parcel in){

  this.setTitle(in.readString());
  this.setLocation((Location)in.readParcelable(android.location.Location.class.getClassLoader()));
  this.setValue(in.readString());
}

I had that problem too, it's a silly thing. The order and number of the methods on writeToParcel and readToParcel should be the same and with the same variables.

I mean:

public void writeToParcel(Parcel dest, int flags) {
   dest.writeString(title);
   dest.writeParcelable((Parcelable)this.getLocation(), flags);
   dest.writeString(value);  
}

must be in the same order as:

private void readFromParcel(Parcel in){

  this.setTitle(in.readString());
  this.setLocation((Location)in.readParcelable(android.location.Location.class.getClassLoader()));
  this.setValue(in.readString());
}

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