在 Android 中创建 Parcelable 类时遇到问题

Question

我正在尝试在 Android 中创建一个 Parcelable 类，以便我可以在 Activity 之间传递这些对象的 ArrayList。我非常密切地关注了 StackOverflow (http://stackoverflow.com/questions/6201311/how-to-read-write-a-boolean-when-implementing-the-parcelable-interface) 和Android 文档（http://developer.android.com/reference/android/os/Parcelable.html），但我在所需的静态字段 CREATOR 上不断收到错误：字段 CREATOR 不能声明为静态；静态字段只能在静态或顶级类型中声明

我在我的类以及直接从 Android 文档剪切/粘贴的示例类上收到此错误。我的情况一定有一些我不知道的独特之处......？我的课程如下。有什么想法吗？

谢谢，

布莱恩

public class ComplaintType implements Parcelable
{
    // class data
    private int groupID = 0;
    private int id = 0;
    private String description = "";
    private boolean checked = false; // does this complaint type apply to this patient?

    // constructors
    public ComplaintType() {}       
    public ComplaintType(int _groupID, String desc, int _id, boolean ckd) {
        this.groupID = _groupID;
        this.description = desc; 
        this.id = _id;
        this.checked = ckd;}

    // getters/setters
    public int getGroupID() {return groupID;}
    public void setGroupID(int _groupID) { this.groupID = _groupID;}
    public String getDesc() {return description;}
    public void setDesc(String desc) {this.description = desc;}
    public int getID() {return id;}
    public void setID(int _id) {this.id = _id;}
    public boolean isChecked() {return checked;}
    public void setChecked(boolean ckd) {this.checked = ckd;}

    // utility functions
    public String toString() {return this.description;}
    public void toggleChecked() {checked = !checked;}

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

    @Override
    public void writeToParcel(Parcel dest, int flags) {
        dest.writeInt(groupID);
        dest.writeInt(id);
        dest.writeString(description);
        dest.writeByte((byte) (checked ? 1 : 0));  // convert byte to a boolean (1=true, 0=false)
    }

    public static final Parcelable.Creator<ComplaintType> CREATOR // <-- ERROR OCCURS HERE
     = new Parcelable.Creator<ComplaintType>() {

        public ComplaintType createFromParcel(Parcel in){
            ComplaintType complaint = new ComplaintType();
            complaint.setGroupID(in.readInt());
            complaint.setID(in.readInt());
            complaint.setDesc(in.readString());
            complaint.setChecked(in.readByte() == 1);  // store the boolean as a byte (1=true, 0=false)
            return complaint;
        }

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

}

Answer 1

听起来你的类在另一个类中被声明为非静态，这就是为什么它不允许有静态数据成员。要么将其设为顶级类，要么将其声明为静态。