使用意图在Activity之间传递数据小插曲__传递对象

Android中Intent中如何传递对象有两种方法，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，通过一个简单的例子来给大家讲解一下。

工程结构图：

运行结果截图：

mainActivity截图

SerialActivity截图

ParcelActivity截图

Book.java:

package com.intent.bean;

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;
	}

	// 实例化静态内部对象CREATOR实现接口Parcelable.Creator
	public static final Parcelable.Creator<Book> CREATOR = new Parcelable.Creator<Book>() {
		// 将Parcel对象反序列化为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];
		}
	};
	
	@Override
	public int describeContents() {
		return 0;
	}

	// 实现Parcelable的方法writeToParcel，将Book序列化为一个Parcel对象
	@Override
	public void writeToParcel(Parcel parcel, int flags) {
		parcel.writeString(bookName);
		parcel.writeString(author);
		parcel.writeInt(publishTime);
	}
}

Person.java:

package com.intent.bean;

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;
	}
}

MainActivity.java:

package com.intent.activity;

import com.intent.bean.Book;
import com.intent.bean.Person;
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 MainActivity extends Activity implements OnClickListener {
	private Button btn_serial;
	private Button btn_parcel;
	public final static String SER_KEY = "com.intent.activity.ser";
	public final static String PAR_KEY = "com.intent.activity.par";

	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		setupViews();
	}

	// 我的一贯作风呵呵
	public void setupViews() {
		btn_serial = (Button) findViewById(R.id.btOpenSerialActivity);
		btn_serial.setOnClickListener(this);
		btn_parcel = (Button) findViewById(R.id.btOpenParcelActivity);
		btn_parcel.setOnClickListener(this);
	}

	// Serializeable传递对象的方法
	public void SerializeMethod() {
		Person mPerson = new Person();
		mPerson.setName("wulianghuan");
		mPerson.setAge(22);
		Intent mIntent = new Intent(this, SerialActivity.class);
		Bundle mBundle = new Bundle();
		mBundle.putSerializable(SER_KEY, mPerson);
		mIntent.putExtras(mBundle);
		startActivity(mIntent);
	}

	// Pacelable传递对象方法
	public void PacelableMethod() {
		Book mBook = new Book();
		mBook.setBookName("Think in java");
		mBook.setAuthor("stven");
		mBook.setPublishTime(2010);
		Intent mIntent = new Intent(this, ParcelActivity.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 == btn_serial) {
			SerializeMethod();
		} else {
			PacelableMethod();
		}
	}
}

SerialActivity.java:

package com.intent.activity;

import com.intent.bean.Person;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;

public class SerialActivity extends Activity {
	@Override
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		TextView mTextView = new TextView(this);
		Person mPerson = (Person) getIntent().getSerializableExtra(MainActivity.SER_KEY);
		mTextView.setText("name: " + mPerson.getName() + " , "
				+ "age: " + mPerson.getAge());
		setContentView(mTextView);
	}
}

ParcelActivity.java:

package com.intent.activity;

import com.intent.bean.Book;
import android.app.Activity;
import android.os.Bundle;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.TextView;

public class ParcelActivity extends Activity {
	public void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		TextView mTextView = new TextView(this);
		Book mBook = (Book) getIntent().getParcelableExtra(MainActivity.PAR_KEY);
		mTextView.setText("name: " + mBook.getBookName() + " , "
				+ "Author: " + mBook.getAuthor() + " , " + "PublishTime: "
				+ mBook.getPublishTime());
		setContentView(mTextView);
	}
}

res/layout/main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >
    
    <Button 
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/btOpenSerialActivity"
        android:text="使用意图传递Serializable对象"/>
    
    <Button 
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:id="@+id/btOpenParcelActivity"
        android:text="使用意图传递Parcelable对象"/>

</LinearLayout>

AndroidManifest.xml文件（将两个新增的Activity，SerialActivity，ParcelActivity)声明一下 :

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
    package="com.intent.activity"
    android:versionCode="1"
    android:versionName="1.0" >

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

    <application
        android:icon="@drawable/ic_launcher"
        android:label="@string/app_name" >
        <activity
            android:label="@string/app_name"
            android:name=".MainActivity" >
            <intent-filter >
                <action android:name="android.intent.action.MAIN" />
                <category android:name="android.intent.category.LAUNCHER" />
            </intent-filter>
        </activity>
        <activity android:name=".SerialActivity"/>
    </application>

</manifest>