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"?>
- ""
- 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"?>
- ""
- 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:
阅读(717) | 评论(0) | 转发(0) |