Android开发之使用Intent传递对象

来源：互联网发布：网络银行系统架构编辑：程序博客网时间：2024/04/30 06:32

原文链接：http://blog.csdn.net/wangjia55/article/details/7430790

大家好，好久不见，今天要给大家讲一下Android 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：

ObjectTranDemo目录结构

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：

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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="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:

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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:

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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);
    }
}
</book></book>

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:

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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<a title="传递对象" href="http://www.android-study.com/jichuzhishi/191.html">传递对象</a>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<a title="传递对象" href="http://www.android-study.com/jichuzhishi/191.html">传递对象</a>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:

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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:

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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):

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<?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

ObjectTranDemo首界面

效果2：点击Serializable按钮

ObjectTranDemo Serializable

效果3：点击Parcelable按钮

ObjectTranDemo Parcelable

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