Android使用Intent在Activity之间传递对象[Serializable或者Parcelable]

在Android中的不同Activity之间传递对象，我们可以考虑采用Bundle.putSerializable(Key,Object);也可以考虑采用Bundle.putParcelable(Key, Object);其中前面一种方法中的Object要实现Serializable接口，后面一种方法中的Object要实现Parcelable接口。下面我们以一个完整的例子来说明。

1.新建一个Android的工程，其中该工程的目录结构如下图：



2. 修改main.xml布局文件。布局文件的源码如下：

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<?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="@string/hello"

/>

<Button

android:id="@+id/serButton"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:text="Serializable"/>

<Button

android:id="@+id/parButton"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:text="Parcelable"/>

</LinearLayout>

3.在工程的src目录下新建一个实体类包，命名为com.andy.entity.同时在该package中添加两个实体类，一个是Person.java，该类实现Serializable接口；一个是Police.java，该类实现Parcelable接口。代码分别如下：

Person.java:

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package com.andy.entity;

import java.io.Serializable;

public class Person implements Serializable {

private static final long serialVersionUID = -6919461967497580385L;

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;

}

}

Police.java:

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package com.andy.entity;

import android.os.Parcel;

import android.os.Parcelable;

public class Police implements Parcelable {

private String name;

private int workTime;

public String getName() {

return name;

}

public void setName(String name) {

this.name = name;

}

public int getWorkTime() {

return workTime;

}

public void setWorkTime(int workTime) {

this.workTime = workTime;

}

public static final Parcelable.Creator<Police> CREATOR = new Creator<Police>() {

@Override

public Police createFromParcel(Parcel source) {

Police police = new Police();

police.name = source.readString();

police.workTime = source.readInt();

return police;

}

@Override

public Police[] newArray(int size) {

return new Police[size];

}

};

@Override

public int describeContents() {

return 0;

}

@Override

public void writeToParcel(Parcel parcel, int flags) {

parcel.writeString(name);

parcel.writeInt(workTime);

}

}

4.在包com.andy.testdemo中修改TestActivity.java类，同时在该包中添加类SerializableDemo和ParcelableDemo，分别继承了Activity类和分别显示Person对象和Police对象的数据。代码如下：

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package com.andy.testdemo;

import com.andy.entity.Person;

import com.andy.entity.Police;

import android.app.Activity;

import android.content.Intent;

import android.os.Bundle;

import android.view.View;

import android.widget.Button;

public class TestActivity extends Activity {

private Button sButton,pButton;

public final static String SER_KEY = "com.andy.ser";

public final static String PAR_KEY = "com.andy.par";

/** Called when the activity is first created. */

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

setContentView(R.layout.main);

sButton = (Button)findViewById(R.id.serButton);

sButton.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View v) {

SerializeMethod();

}

});

pButton = (Button)findViewById(R.id.parButton);

pButton.setOnClickListener(new View.OnClickListener() {

@Override

public void onClick(View v) {

PacelableMethod();

}

});

}

/**

* Serializeable传递对象的方法

*/

private void SerializeMethod(){

Person mPerson = new Person();

mPerson.setName("andy");

mPerson.setAge(26);

Intent mIntent = new Intent(this,SerializableDemo.class);

Bundle mBundle = new Bundle();

mBundle.putSerializable(SER_KEY,mPerson);

mIntent.putExtras(mBundle);

startActivity(mIntent);

}

/**

* Pacelable传递对象方法

*/

private void PacelableMethod(){

Police mPolice = new Police();

mPolice.setName("I am Police");

mPolice.setWorkTime(2008);

Intent mIntent = new Intent(this,ParcelableDemo.class);

Bundle mBundle = new Bundle();

mBundle.putParcelable(PAR_KEY, mPolice);

mIntent.putExtras(mBundle);

startActivity(mIntent);

}

}

SerializableDemo.java类

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package com.andy.testdemo;

import com.andy.entity.Person;

import android.app.Activity;

import android.os.Bundle;

import android.widget.TextView;

public class SerializableDemo extends Activity {

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

TextView mTextView = new TextView(this);

Person mPerson = (Person)getIntent().getSerializableExtra(TestActivity.SER_KEY);

mTextView.setText("You name is: " + mPerson.getName() + "/n"+

"You age is: " + mPerson.getAge());

setContentView(mTextView);

}

}

ParcelableDemo.java类：

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package com.andy.testdemo;

import com.andy.entity.Police;

import android.app.Activity;

import android.os.Bundle;

import android.widget.TextView;

public class ParcelableDemo extends Activity {

@Override

public void onCreate(Bundle savedInstanceState) {

super.onCreate(savedInstanceState);

TextView mTextView = new TextView(this);

Police mPolice = (Police)getIntent().getParcelableExtra(TestActivity.PAR_KEY);

mTextView.setText("Police name is: " + mPolice.getName()+"/n"+

"WorkTime is: " + mPolice.getWorkTime() + "/n");

setContentView(mTextView);

}

}

5.在AndroidManifest.xml文件中为新添加的两个Activity进行注册。

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<?xml version="1.0" encoding="utf-8"?>

<manifest xmlns:android="http://schemas.android.com/apk/res/android"

package="com.andy.testdemo"

android:versionCode="1"

android:versionName="1.0">

<application android:icon="@drawable/icon" android:label="@string/app_name">

<activity android:name=".TestActivity"

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=".SerializableDemo"/>

<activity android:name=".ParcelableDemo"/>

</application>

<uses-sdk android:minSdkVersion="8" />

</manifest>

6.运行程序查看效果图：

【1】主界面截图：



【2】点击Serializable按钮的效果



【3】点击Parcelable按钮的效果



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以上是如何采用Intent在不同的Activity之间传递对象的例子。