大家好,好久不见,今天要给大家讲一下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,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:
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
"1.0" encoding= "utf-8" ?>
"http://schemas.android.com/apk/res/android"
android:orientation="vertical"
android:layout_width="fill_parent"
android:layout_height="fill_parent"
>
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Welcome to Mr wei's blog."
/>
android:id="@+id/button1"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Serializable"
/>
android:id="@+id/button2"
android:layout_width="fill_parent"
android:layout_height="wrap_content"
android:text="Parcelable"
/>
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 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 CREATOR = new Creator() {
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,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:
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();
}
public void setupViews(){
sButton = (Button)findViewById(R.id.button1);
pButton = (Button)findViewById(R.id.button2);
sButton.setOnClickListener(this );
pButton.setOnClickListener(this );
}
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);
}
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);
}
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):
"1.0" encoding= "utf-8" ?>
"http://schemas.android.com/apk/res/android"
package = "com.tutor.objecttran"
android:versionCode="1"
android:versionName="1.0" >
"@drawable/icon" android:label= "@string/app_name" >
".ObjectTranDemo"
android:label="@string/app_name" >
"android.intent.action.MAIN" />
"android.intent.category.LAUNCHER" />
".ObjectTranDemo1" >
".ObjectTranDemo2" >
"7" />
第六步:运行上述工程查看效果图啦:
效果1:首界面:
效果2:点击Serializable按钮
效果3:点击Parcelable按钮:
OK~今天就先到这里了,大家如果要嫌代码过长,不想敲的话,可以留下Email.俺给你邮过去,呵呵~希望对大家 有点小帮助 ,bye~