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

Ricky Sparks
Ricky Sparks
22,249 Points
Posted by Ricky Sparks
Ricky Sparks
22,249 Points

add code to set the member variables from the Parcel???

Not sure what I am doing wrong???

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!
      mVideoGame = in.readDouble();

    }

    public static final Creator<VideoGame> CREATOR = new Creator<VideoGame>() {
        @Override
        public VideoGame createFromParcel(Parcel source) {
            // Task 2 code here!
            return new VideoGame(source);
        }

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

1 Answer

Steve Hunter
Steve Hunter
57,712 Points

Hi Ricky,

The variables that need setting are mTitle and mYear within the class we're dealing with. They were stored in that order within the parcel. We're now using that parcel within the constructor of the VideoGame class to create an instance of a video game.

The constructor needs to set both the variables above. But first they need extracting from the parcel which is called in. We should extract the two variables in the same order, as above, and also make sure we use the appropriate method based on the type of the variable. mTitle is a String, mYear is an int. So, for example, we can get the title with in.getString();. Building from that and completing the constructor gives you:

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

I hope that makes sense.

Steve.

Ricky Sparks
Ricky Sparks
22,249 Points
Ricky Sparks
Ricky Sparks
22,249 Points

Thanks alot :D it did help make sense on referring for string and int from the code above the task.

Steve Hunter
Steve Hunter
57,712 Points

Cool - glad you got it sorted. :-)

Steve.