java - Parcelable 协议(protocol)需要一个名为 CREATOR 的 Parcelable.Creator 对象(我确实有 CREATOR)

Question

我正在尝试将 Parcelable 数据从一个 Intent 传递到另一个 Intent ，这是我得到的错误:

08-31 14:12:22.709: E/AndroidRuntime(9931): FATAL EXCEPTION: main
08-31 14:12:22.709: E/AndroidRuntime(9931): java.lang.RuntimeException: Unable to start activity ComponentInfo{com.matejsoftware.cardscoretracker/com.matejsoftware.cardscoretracker.Igra}: android.os.BadParcelableException: Parcelable protocol requires a Parcelable.Creator object called  CREATOR on class com.matejsoftware.cardscoretracker.Novaigra$Player

问题是:我确实有 Parcelable.Creator 对象。我将在下面发布整个 Parcelable 代码:

public class Player implements Parcelable{
    String name;
    int score;
    @Override
    public int describeContents() {
        // TODO Auto-generated method stub
        return 0;
    }
    @Override
    public void writeToParcel(Parcel dest, int flags) {
        dest.writeString(name);
        dest.writeInt(score);
    }

    public Player(Parcel source){
        score = source.readInt();
        name = source.readString();
    }

    public Player(int score, String name){
        this.score = score;
        this.name = name;
    }
}

public class MyCreator implements Parcelable.Creator<Player> {

    @Override
    public Player createFromParcel(Parcel source) {
        return new Player(source);
    }

    @Override
    public Player[] newArray(int size) {
        return new Player[size];
    }

}

CREATOR 有什么问题吗？当我单击按钮开始下一个 Activity 时，应用程序立即崩溃。

这就是我在第二个 Activity 中“检索”Parcelable 数据的方式:

//global variable
ArrayList<Player> playersParceledData;

//This is in onCreate
playersData = getIntent();
playersParceledData = playersData.getParcelableArrayListExtra("parceledData");

另外，这就是我将类对象放入 ParcelableArrayListExtra 的方式:

Player newPlayer = new Player(0, text);
playersParceledData.add(newPlayer);
zacniIgro.putParcelableArrayListExtra("parceledData", playersParceledData);

Answer 1

从 Parcel 读取的顺序与写入的顺序不同。

在 writeToParcel() 中，您首先放入 String，但在 HeatFriendDetail(Parcel in) 中，您首先读取整数。这不是正确的方式，因为顺序或读/写很重要。

以下是在向 Parcel 写入/读取数据时执行正确顺序的代码(另见 this link):

public class FriendDetail implements Parcelable {

    private String full_name;
    private int privacy;

    public HeatFriendDetail(Parcel in) {
        this.full_name = in.readString();
        this.privacy = in.readInt();
    }

    public HeatFriendDetail() {

    }

    @Override
    public void writeToParcel(Parcel dest, int flags) {

        dest.writeString(this.full_name);
        dest.writeInt(this.privacy);
    }

    public static final Parcelable.Creator CREATOR = new Parcelable.Creator() {
        public HeatFriendDetail createFromParcel(Parcel in) {
            return new HeatFriendDetail(in);
        }

        public HeatFriendDetail[] newArray(int size) {
            return new HeatFriendDetail[size];
        }
    };

    // GETTER SETTER//
}