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：
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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 copypackage 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>() { @overridepublic police createfromparcel(parcel source) { police police = new police(); police.name = source.readstring(); police.worktime = source.readint(); return police; } @overridepublic police[] newarray(int size) { return new police[size]; } }; @overridepublic int describecontents() { return 0; } @overridepublic 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. */@overridepublic void oncreate(bundle savedinstancestate) { super.oncreate(savedinstancestate); setcontentview(r.layout.main); sbutton = (button)findviewbyid(r.id.serbutton); sbutton.setonclicklistener(new view.onclicklistener() { @overridepublic void onclick(view v) { serializemethod(); } }); pbutton = (button)findviewbyid(r.id.parbutton); pbutton.setonclicklistener(new view.onclicklistener() { @overridepublic 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 { @overridepublic 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 { @overridepublic 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。
