Android中使用Intent在Activity之間傳遞對象(使用Serializable或者Parcelable)的方法

 Android中的不同Activity之間傳遞對象，我們可以考慮采用Bundle.putSerializable(Key,Object);也可以考慮采用Bundle.putParcelable(Key, Object);其中前面一種方法中的Object要實現Serializable接口，後面一種方法中的Object要實現Parcelable接口。下面我們以一個完整的例子來說明。

1.新建一個Android的工程，其中該工程的目錄結構如下圖：

2. 修改main.xml布局文件。布局文件的源碼如下：

<?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目錄下新建一個實體類包，命名為com.andy.entity.同時在該package中添加兩個實體類，一個是Person.java，該類實現Serializable接口；一個是Police.java，該類實現Parcelable接口。代碼分別如下：

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<Police> CREATOR = new Creator<Police>() { 
@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類，同時在該包中添加類SerializableDemo和ParcelableDemo，分別繼承了Activity類和分別顯示Person對象和Police對象的數據。代碼如下：

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傳遞對象的方法 
*/ 
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傳遞對象方法 
*/ 
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類

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類：

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文件中為新添加的兩個Activity進行注冊。

<?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.運行程序查看效果圖：

【1】主界面截圖：

【2】點擊Serializable按鈕的效果

【3】點擊Parcelable按鈕的效果

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以上是如何采用Intent在不同的Activity之間傳遞對象的例子。