How to implement parcelable for List

Question

I'm trying to pass a List in my parcelable doing: ``` public class MetaDados implements Parcelable { private List sizeImages; public MetaDados(List sizeImages){ this.sizeImages = sizeImages; } public List getSizeImages() { return sizeImages; } public void setSizeImages(List sizeImages) { this.sizeImages = sizeImages; } @Override public int describeContents() { // TODO Auto-generated method stub return 0; } @Override public void writeToParcel(Parcel dest, int flags) { dest.writeList(sizeImages); } public static final Parcelable.Creator CREATOR = new Parcelable.Creator() { @Override public MetaDados createFromParcel(Parcel in) { return new MetaDados(in); } @Override public MetaDados[] newArray(int size) { return new MetaDados[size]; } }; private MetaDados(Parcel in) { //HERE IS THE PROBLEM, I'VE tried this: sizeImages = in.readList(sizeImages, Long.class.getClassLoader()); //but what i got: Type mismatch: cannot convert from void to List

Accepted Answer

Try this instead:

```
sizeImages = new ArrayList<Long>(); // or any other type of List
in.readList(sizeImages, null);
```

The Android documentation for `Parcel.readList` says:

Read into an existing List object from the parcel

and thus, you need to first create the `List`.

How to implement parcelable for List<Long>

Solution

Problem