java 传递intent-凯发ag旗舰厅登录网址下载

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：

android:orientation="vertical"

android:layout_width="fill_parent"

android:layout_height="fill_parent"

>

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:text="@string/hello"

/>

android:id="@ id/serbutton"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:text="serializable"/>

android:id="@ id/parbutton"

android:layout_width="fill_parent"

android:layout_height="wrap_content"

android:text="parcelable"/>

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 creator = new creator() {

@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。

package="com.andy.testdemo"

android:versioncode="1"

android:versionname="1.0">

android:label="@string/app_name">

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

=========================================================================

以上是如何采用intent在不同的activity之间传递对象的例子。

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