Parcelable接口

1. Parcelable接口

Interface for classes whose instances can be written to

 and restored from a  Parcel.  Classes implementing the Parcelable

 interface must also have a static field called CREATOR, which

  is an object implementing the Parcelable.Creator Parcelable.Creator

  interface.

2.接口定义

public interface Parcelable {
public static final int PARCELABLE_WRITE_RETURN_VALUE = 0x0001;
public static final int CONTENTS_FILE_DESCRIPTOR = 0x0001;
public int describeContents();
public void writeToParcel(Parcel dest, int flags);
public interface Creator<T> {

public T createFromParcel(Parcel source);

public T[] newArray(int size);
}

public interface ClassLoaderCreator<T> extends Creator<T> {
public T createFromParcel(Parcel source, ClassLoader loader);
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3.接口实现例子
public class MyParcelable implements Parcelable {
private int mData;

public int describeContents() {
return 0;
}

public void writeToParcel(Parcel out, int flags) {
out.writeInt(mData);
}

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

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

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