Android中Intent传递对象的两种方法(Serializable,Parcelable)!

2010-07-16 22:13 21879人阅读 评论(99) 收藏 举报

大家好，好久不见，今天要给大家讲一下Android中Intent中如何传递对象,就我目前所知道的有两种方法，一种是Bundle.putSerializable(Key,Object);另一种是Bundle.putParcelable(Key, Object);当然这些Object是有一定的条件的，前者是实现了Serializable接口，而后者是实现了Parcelable接口，为了让大家更容易理解我还是照常写了一个简单的Demo,大家就一步一步跟我来吧！

第一步:新建一个Android工程命名为ObjectTranDemo(类比较多哦!)目录结构如下图:

 

第二步:修改main.xml布局文件(这里我增加了两个按钮)代码如下

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:orientation="vertical"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    >
<TextView
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="Welcome to Mr wei's blog."
    />
<Button
    android:id="@+id/button1"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="Serializable"
/>
<Button
    android:id="@+id/button2"
    android:layout_width="fill_parent"
    android:layout_height="wrap_content"
    android:text="Parcelable"
/>
</LinearLayout>

第三步:新建两个类一个是Person.java实现Serializable接口，另一个Book.java实现Parcelable接口，代码分别如下:

Person.java:

package com.tutor.objecttran;
import java.io.Serializable;
public class Person implements Serializable {
    private static final long serialVersionUID = -7060210544600464481L;
    private String name;
    private int age;
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public int getAge() {
        return age;
    }
    public void setAge(int age) {
        this.age = age;
    }

}

Book.java:

package com.tutor.objecttran;
import android.os.Parcel;
import android.os.Parcelable;
public class Book implements Parcelable {
    private String bookName;
    private String author;
    private int publishTime;

    public String getBookName() {
        return bookName;
    }
    public void setBookName(String bookName) {
        this.bookName = bookName;
    }
    public String getAuthor() {
        return author;
    }
    public void setAuthor(String author) {
        this.author = author;
    }
    public int getPublishTime() {
        return publishTime;
    }
    public void setPublishTime(int publishTime) {
        this.publishTime = publishTime;
    }

    public static final Parcelable.Creator<Book> CREATOR = new Creator<Book>() {
        public Book createFromParcel(Parcel source) {
            Book mBook = new Book();
            mBook.bookName = source.readString();
            mBook.author = source.readString();
            mBook.publishTime = source.readInt();
            return mBook;
        }
        public Book[] newArray(int size) {
            return new Book[size];
        }
    };

    public int describeContents() {
        return 0;
    }
    public void writeToParcel(Parcel parcel, int flags) {
        parcel.writeString(bookName);
        parcel.writeString(author);
        parcel.writeInt(publishTime);
    }
}

第四步:修改ObjectTranDemo.java,并且新建两个Activity,一个是ObjectTranDemo1.java,别一个是ObjectTranDemo2.java.分别用来显示Person对像数据，和Book对象数据:,代码分别如下：

ObjectTranDemo.java:

package com.tutor.objecttran;
import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
public class ObjectTranDemo extends Activity implements OnClickListener {

    private Button sButton,pButton;
    public  final static String SER_KEY = "com.tutor.objecttran.ser";
    public  final static String PAR_KEY = "com.tutor.objecttran.par";
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
        setupViews();

    }

    //我的一贯作风呵呵
    public void setupViews(){
        sButton = (Button)findViewById(R.id.button1);
        pButton = (Button)findViewById(R.id.button2);
        sButton.setOnClickListener(this);
        pButton.setOnClickListener(this);
    }
    //Serializeable传递对象的方法
    public void SerializeMethod(){
        Person mPerson = new Person();
        mPerson.setName("frankie");
        mPerson.setAge(25);
        Intent mIntent = new Intent(this,ObjectTranDemo1.class);
        Bundle mBundle = new Bundle();
        mBundle.putSerializable(SER_KEY,mPerson);
        mIntent.putExtras(mBundle);

        startActivity(mIntent);
    }
    //Pacelable传递对象方法
    public void PacelableMethod(){
        Book mBook = new Book();
        mBook.setBookName("Android Tutor");
        mBook.setAuthor("Frankie");
        mBook.setPublishTime(2010);
        Intent mIntent = new Intent(this,ObjectTranDemo2.class);
        Bundle mBundle = new Bundle();
        mBundle.putParcelable(PAR_KEY, mBook);
        mIntent.putExtras(mBundle);

        startActivity(mIntent);
    }
    //铵钮点击事件响应
    public void onClick(View v) {
        if(v == sButton){
            SerializeMethod();
        }else{
            PacelableMethod();
        }
    }
}

ObjectTranDemo1.java:

package com.tutor.objecttran;
import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;
public class ObjectTranDemo1 extends Activity {
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);

        TextView mTextView = new TextView(this);
        Person mPerson = (Person)getIntent().getSerializableExtra(ObjectTranDemo.SER_KEY);
        mTextView.setText("You name is: " + mPerson.getName() + "/n"+
                "You age is: " + mPerson.getAge());

        setContentView(mTextView);
    }
}

ObjectTranDemo2.java:

package com.tutor.objecttran;
import android.app.Activity;
import android.os.Bundle;
import android.widget.TextView;
public class ObjectTranDemo2 extends Activity {

    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        TextView mTextView = new TextView(this);
        Book mBook = (Book)getIntent().getParcelableExtra(ObjectTranDemo.PAR_KEY);
        mTextView.setText("Book name is: " + mBook.getBookName()+"/n"+
                          "Author is: " + mBook.getAuthor() + "/n" +
                          "PublishTime is: " + mBook.getPublishTime());
        setContentView(mTextView);
    }
}

第五步:比较重要的一步啦，修改AndroidManifest.xml文件（将两个新增的Activity，ObjectTranDemo1,ObjectTranDemo2)申明一下代码如下(第14，15行):

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
      package="com.tutor.objecttran"
      android:versionCode="1"
      android:versionName="1.0">
    <application android:icon="@drawable/icon" android:label="@string/app_name">
        <activity android:name=".ObjectTranDemo"
                  android:label="@string/app_name">
            <intent-filter>
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity android:name=".ObjectTranDemo1"></activity>
        <activity android:name=".ObjectTranDemo2"></activity>
    </application>
    <uses-sdk android:minSdkVersion="7" />
</manifest>

第六步:运行上述工程查看效果图啦:

效果1：首界面:

效果2:点击Serializable按钮

效果3:点击Parcelable按钮:

OK~今天就先到这里了，大家如果要嫌代码过长，不想敲的话，可以留下Email.俺给你邮过去，呵呵~希望对大家 有点小帮助 ，bye~

转：http://blog.csdn.net/Android_Tutor/article/details/5740845