Android高手進階教程(十七)之---Android中Intent傳遞對象的兩種方法(Serializable,Parcelable)!

大家好，好久不見，今天要給大家講一下Android中Intent中如何傳遞對象,就我目前所知道的有兩種方法，一種是Bundle.putSerializable(Key,Object);另一種是Bundle.putParcelable(Key, Object);當然這些Object是有一定的條件的，前者是實現了Serializable接口，而後者是實現了Parcelable接口，爲了讓大家更容易理解我還是照常寫了一個簡單的Demo,大家就一步一步跟我來吧！

第一步:新建一個Android工程命名爲ObjectTranDemo(類比較多哦!)目錄結構如下圖:

 

第二步:修改main.xml佈局文件(這裏我增加了兩個按鈕)代碼如下<?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="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:新建兩個類一個是Person.java實現Serializable接口，另一個Book.java實現Parcelable接口，代碼分別如下:

Person.java:

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:

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); } }

第四步:修改ObjectTranDemo.java,並且新建兩個Activity,一個是ObjectTranDemo1.java,別一個是ObjectTranDemo2.java.分別用來顯示Person對像數據，和Book對象數據:,代碼分別如下：

ObjectTranDemo.java:

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(); } //我的一貫作風呵呵 public void setupViews(){ sButton = (Button)findViewById(R.id.button1); pButton = (Button)findViewById(R.id.button2); sButton.setOnClickListener(this); pButton.setOnClickListener(this); } //Serializeable傳遞對象的方法 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傳遞對象方法 public void PacelableMethod(){ Book mBook = new Book(); mBook.setBookName("Android Tutor"); mBook.setAuthor("Frankie"); mBook.setPublishTime(2010); Intent mIntent = new Intent(this,ObjectTranDemo2.class); Bundle mBundle = new Bundle(); mBundle.putParcelable(PAR_KEY, mBook); mIntent.putExtras(mBundle); startActivity(mIntent); } //銨鈕點擊事件響應 public void onClick(View v) { if(v == sButton){ SerializeMethod(); }else{ PacelableMethod(); } } }

ObjectTranDemo1.java:

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:

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:比較重要的一步啦，修改AndroidManifest.xml文件（將兩個新增的Activity，ObjectTranDemo1,ObjectTranDemo2)申明一下代碼如下(第14，15行):

<?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:運行上述工程查看效果圖啦:

效果1：首界面:

效果2:點擊Serializable按鈕

效果3:點擊Parcelable按鈕:

OK~今天就先到這裏了，大家如果要嫌代碼過長，不想敲的話，可以留下Email.俺給你郵過去，呵呵~希望對大家 有點小幫助 ，bye~