Intent传递对象的两种方法(Serializable,Parcelable)

今天讲一下Android中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

第一步:新建一个Android工程命名为IntentDemo

第二步:修改main.xml布局文件

    <?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

    package cn.caiwb.intent;  
    import java.io.Serializable;  
    public class Person implements Serializable {  
     
        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

    package cn.caiwb.intent;  
    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);  
        }  
    }  

第四步:修改IntentDemo.java,并且新建两个Activity,一个是IntentDemo1.java,别一个是IntentDemo2.java.分别用来显示Person对像数据，和Book对象数据:,代码分别如下：

IntentDemo.java

    package cn.caiwb.intent;  
    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 IntentDemo extends Activity implements OnClickListener {  
          
        private Button sButton,pButton;  
        public  final static String SER_KEY = "cn.caiwb.intent.ser";  
        public  final static String PAR_KEY = "cn.caiwb.intent.par";  
        public void onCreate(Bundle savedInstanceState) {  
            super.onCreate(savedInstanceState);  
            setContentView(R.layout.main);     
            setupViews();  
              
        }  
          
        public void setupViews(){  
            sButton = (Button)findViewById(R.id.button1);  
            pButton = (Button)findViewById(R.id.button2);  
            sButton.setOnClickListener(this);  
            pButton.setOnClickListener(this);  
        }  
        //Serializeable传递对象的方法  
        public void SerializeMethod(){  
            Person mPerson = new Person();  
            mPerson.setName("frankie");  
            mPerson.setAge(25);  
            Intent mIntent = new Intent(this,IntentDemo1.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("Android Tutor");  
            mBook.setAuthor("Frankie");  
            mBook.setPublishTime(2010);  
            Intent mIntent = new Intent(this,IntentDemo2.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();  
            }  
        }  
    }  

IntentDemo1.java

    package cn.caiwb.intent;  
    import android.app.Activity;  
    import android.os.Bundle;  
    import android.widget.TextView;  
    public class IntentDemo1 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);  
        }  
    }  

IntentDemo2.java

    package cn.caiwb.intent;  
    import android.app.Activity;  
    import android.os.Bundle;  
    import android.widget.TextView;  
    public class IntentDemo2 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);  
        }  
    }  

OK 可以了~