Android中使用Intent在Activity之间传递对象(使用Serializable或者Parcelable)的方法

 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：

<?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:
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:
[c-sharp] view plain copy
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：

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

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：

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。

<?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。