Android开发中网络传递对象的几种方法
当我们使用intent在活动之间传输信息时，我们发现putextra不支持自定义对象的传输，下面由爱站技术频道小编为大家讲解Android开发中网络传递对象的几种方法。
在Android中intent传递对象主要有2种方式分别是，Bundle.putSerializable(Key,Object)和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，以下是我为大家做的一个实例
首先我们建立一个工程项目命名为：ObjectTestDemo
然后我们再修改main.xml布局文件，主要增加2个按钮
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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 Jesson'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"
/>
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 jesson'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"
/>
[code]
接下来我们开始对工程进行实现，分别建立Person.java实现Serializable接口，另一个Book.java实现Parcelable接口
[code]
package com.test.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;
}
}
package com.test.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;
}
}
package com.test.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);
}
}
package com.test.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);
}
}
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
package com.test.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);
}
//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,ObjectTranDemo1.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,ObjectTranDemo2.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();
}
}
}
代码
package com.test.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);
}
//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,ObjectTranDemo1.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,ObjectTranDemo2.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();
}
}
}
代码
package com.test.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() + ""+
"You age is: " + mPerson.getAge());
setContentView(mTextView);
}
代码
package com.test.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() + ""+
"You age is: " + mPerson.getAge());
setContentView(mTextView);
}
}
代码
package com.test.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()+""+
"Author is: " + mBook.getAuthor() + "" +
"PublishTime is: " + mBook.getPublishTime()); setContentView(mTextView);
}
}
package com.test.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()+""+
"Author is: " + mBook.getAuthor() + "" +
"PublishTime is: " + mBook.getPublishTime());
setContentView(mTextView);
}
}
下面是最重要的环节：修改AndroidManifest.xml文件(将两个新增的Activity，ObjecttestDemo1,ObjecttestDemo2)申明一下代码如下(第14，15行):
代码
package="com.test.tutor.objecttran"
android:versionCode="1"
android:versionName="1.0">
android:label="@string/app_name">
package="com.test.tutor.objecttran"
android:versionCode="1"
android:versionName="1.0">
android:label="@string/app_name">
Android开发中网络传递对象的几种方法爱站技术频道就为大家介绍到这里了，学习的平台有很多个，我们应该根据实力去选择哦。
