Bundle Object

有两种方法传递Object给Bundle


Method 1

Java:

package de.padde.test;

import android.app.Activity;
import android.os.Bundle;
import android.os.Parcelable;
import android.os.Parcel;

public class Test extends Activity {

    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
       
        if(!savedInstanceState.isEmpty()) {
            SaveMe state = savedInstanceState.getParcelable("laststate");
        }
               
    }
   
    protected void onPause() {
        Bundle b = new Bundle();
           b.putParcelable("laststate", new SaveMe());

           onSaveInstanceState(b);
    }
}

class SaveMe implements Parcelable {
    static final int test = 1234;
    private int user;
    private String name;
    private double score;
    private SaveMeToo smt;
   
    public void writeToParcel(Parcel out, int flags) {
        out.writeInt(user);
        out.writeString(name);
        out.writeDouble(score);
        out.writeParcelable(smt, flags);
    }

    public static final Parcelable.Creator CREATOR = new Parcelable.Creator() {
        public SaveMe createFromParcel(Parcel in) { return new SaveMe(in); }
        public SaveMe[] newArray(int size) { return new SaveMe[size]; }
    };
   
    private SaveMe(Parcel in) {
        user = in.readInt();
        name = in.readString();
        score = in.readDouble();
        smt = in.readParcelable(getClass().getClassLoader());
    }
   
    public SaveMe() {}

    public int describeContents() { return 0; }
}

class SaveMeToo implements Parcelable {
    private int moo;
   
    public void writeToParcel(Parcel out, int flags) {
        out.writeInt(moo);
    }
   
    public static final Parcelable.Creator CREATOR = new Parcelable.Creator() {
        public SaveMeToo createFromParcel(Parcel in) { return new SaveMeToo(in); }
        public SaveMeToo[] newArray(int size) { return new SaveMeToo[size]; }
    };
   
    private SaveMeToo(Parcel in) {
        moo = in.readInt();
    }
   
    public int describeContents() { return 0; }
}

Method 2

Java:

package de.padde.test;

import java.io.Serializable;

import android.app.Activity;
import android.os.Bundle;

public class Test extends Activity {

    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
       
        if(!savedInstanceState.isEmpty()) {
            SaveMe state = (SaveMe) savedInstanceState.getSerializable("laststate");
        }
               
    }
   
    protected void onPause() {
        Bundle b = new Bundle();
           b.putSerializable("laststate", new SaveMe());

           onSaveInstanceState(b);
    }
}

class SaveMe implements Serializable {
    private static final long serialVersionUID = 1L;

    static final int test = 1234;
    private int user;
    private String name;
    private double score;
    private SaveMeToo smt;

    public SaveMe() {}
}

class SaveMeToo implements Serializable {
    private static final long serialVersionUID = 2L;
   
    private int moo;

    public SaveMeToo() {}
}