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Android Android Lists and Adapters (2015) Using Parcelable Data Reading Parcelable Data

i think this is editor issue ...

ive referenced http://developer.android.com/reference/android/os/Parcelable.html and it doesnt work ??? any ideas

VideoGame.java
public class VideoGame implements Parcelable {

    public String mTitle = "";
    public int mYear = 0;

    public VideoGame() {
        // intentionally blank
    }

    // getters and setters omitted for brevity!

    @Override
    public int describeContents() {
        return 0;
    }

    @Override
    public void writeToParcel(Parcel dest, int flags) {
        dest.writeString(mTitle);
        dest.writeInt(mYear);
    }

    public VideoGame(Parcel in) {
        // Task 1 code here!
        in.readString();
        in.readInt();
    }

    public static final Creator<VideoGame> CREATOR = new Creator<VideoGame>() {
        @Override
        public VideoGame createFromParcel(Parcel source) {
            // Task 2 code here!
            return new VideoGame(source); // i dont get why  this is not working???
        }

        @Override
        public VideoGame[] newArray(int size) {
            // Task 3 code here!
            return new VideoGame[0];
        }
    };
}

3 Answers

william parrish
william parrish
13,774 Points

Task 2 is correct, you are not doing anything wrong there.

Task 1 is not correct ( even though it allowed you to proceed, this is a big and they should / will likely fix it )

Task 1 being incorrect, causes the constructor in task 2 to fail.

To fix task 1:

You need to read the values from the parcel, and assign them to mTitle and mYear.

for example

mTitle = parcel.readString(); mYear = parcel.readInt();

when you do this correctly step two will pass, and you should be good to go.

thanks will i submitted a bug but have a look over at this link http://developer.android.com/reference/android/os/Parcelable.html it is also quite misleading lol and i got the task done before i saw this post thanks man

william parrish
william parrish
13,774 Points

Therein lies the rub,

On DAC the big difference that allows their example to work is addition of a separate constructor, that handles object creation from a parcel.

 private MyParcelable(Parcel in) {
     mData = in.readInt();
 } 

The absence of a parcel specific constructor in the above coding exercise, is the reason you have to set those fields yourself.

Anywho, glad you got sorted all the same.