代码改变世界

Android系列之Intent传递对象的两种方法

2010-11-14 12:28  $等待$  阅读(3261)  评论(0编辑  收藏  举报

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

 

代码
1 view plaincopy to clipboardprint?
2
3   < ?xml version="1.0" encoding="utf-8"?>
4
5   < LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
6
7   android:orientation="vertical"
8
9   android:layout_width="fill_parent"
10
11   android:layout_height="fill_parent"
12
13   >
14
15   < TextView
16
17   android:layout_width="fill_parent"
18
19   android:layout_height="wrap_content"
20
21   android:text="Welcome to Mr Jesson's blog."
22
23   />
24
25   < Button
26
27   android:id="@+id/button1"
28
29   android:layout_width="fill_parent"
30
31   android:layout_height="wrap_content"
32
33   android:text="Serializable"
34
35   />
36
37   < Button
38
39   android:id="@+id/button2"
40
41   android:layout_width="fill_parent"
42
43   android:layout_height="wrap_content"
44
45   android:text="Parcelable"
46
47   />
48
49   < /LinearLayout>
50
51   < ?xml version="1.0" encoding="utf-8"?>
52
53   < LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
54
55   android:orientation="vertical"
56
57   android:layout_width="fill_parent"
58
59   android:layout_height="fill_parent"
60
61   >
62
63   < TextView
64
65   android:layout_width="fill_parent"android:layout_height="wrap_content"
66
67   android:text="Welcome to Mr jesson's blog."
68
69   />
70
71   < Button
72
73   android:id="@+id/button1"
74
75   android:layout_width="fill_parent"
76
77   android:layout_height="wrap_content"
78
79   android:text="Serializable"
80
81   />
82
83   < Button
84
85   android:id="@+id/button2"
86
87   android:layout_width="fill_parent"
88
89   android:layout_height="wrap_content"
90
91   android:text="Parcelable"
92
93   />
94
95   < /LinearLayout>
96  

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

 

代码
1 package com.test.objecttran;
2
3   import java.io.Serializable;
4
5   public class Person implements Serializable {
6
7   private static final long serialVersionUID = -7060210544600464481L;
8
9   private String name;
10
11   private int age;
12
13   public String getName() {
14
15   return name;
16
17   }
18
19   public void setName(String name) {
20
21   this.name = name;
22
23   }
24
25   public int getAge() {
26
27   return age;
28
29   }
30
31   public void setAge(int age) {
32
33   this.age = age;
34
35   }
36
37   }
38

 

代码
1 package com.test.tutor.objecttran;
2
3   import java.io.Serializable;
4
5   public class Person implements Serializable {
6
7   private static final long serialVersionUID = -7060210544600464481L;
8
9   private String name;
10
11   private int age;
12
13   public String getName() {
14
15   return name;
16
17   }
18
19   public void setName(String name) {
20
21   this.name = name;
22
23   }
24
25   public int getAge() {
26
27   return age;
28
29   }
30
31   public void setAge(int age) {
32
33   this.age = age;
34
35   }
36
37   }
38

 

代码
1 package com.test.tutor.objecttran;
2
3
4
5  import android.os.Parcel;
6
7   import android.os.Parcelable;
8
9   public class Book implements Parcelable {
10
11   private String bookName;
12
13   private String author;
14
15   private int publishTime;
16
17   public String getBookName() {
18
19   return bookName;
20
21   }
22
23   public void setBookName(String bookName) {
24
25   this.bookName = bookName;
26
27   }
28
29   public String getAuthor() {
30
31   return author;
32
33   }
34
35   public void setAuthor(String author) {
36
37   this.author = author;
38
39   }
40
41   public int getPublishTime() {
42
43   return publishTime;
44
45   }
46
47   public void setPublishTime(int publishTime) {
48
49   this.publishTime = publishTime;
50
51   }
52
53   public static final Parcelable.Creator CREATOR = new Creator() {
54
55   public Book createFromParcel(Parcel source) {
56
57   Book mBook = new Book();
58
59   mBook.bookName = source.readString();
60
61   mBook.author = source.readString();
62
63   mBook.publishTime = source.readInt();
64
65   return mBook;
66
67   }
68
69   public Book[] newArray(int size) {
70
71   return new Book[size];
72
73   }
74
75   };
76
77   public int describeContents() {
78
79   return 0;
80
81   }
82
83   public void writeToParcel(Parcel parcel, int flags) {
84
85   parcel.writeString(bookName);
86
87   parcel.writeString(author);
88
89   parcel.writeInt(publishTime);
90
91   }
92
93   }
94

 

代码
1 package com.test.tutor.objecttran;
2
3   import android.os.Parcel;
4
5   import android.os.Parcelable;
6
7   public class Book implements Parcelable {
8
9   private String bookName;
10
11   private String author;
12
13   private int publishTime;
14
15   public String getBookName() {
16
17   return bookName;
18
19   }
20
21   public void setBookName(String bookName) {this.bookName = bookName;
22
23   }
24
25   public String getAuthor() {
26
27   return author;
28
29   }
30
31   public void setAuthor(String author) {
32
33   this.author = author;
34
35   }
36
37   public int getPublishTime() {
38
39   return publishTime;
40
41   }
42
43   public void setPublishTime(int publishTime) {
44
45   this.publishTime = publishTime;
46
47   }
48
49   public static final Parcelable.Creator CREATOR = new Creator() {
50
51   public Book createFromParcel(Parcel source) {
52
53   Book mBook = new Book();
54
55   mBook.bookName = source.readString();
56
57   mBook.author = source.readString();
58
59   mBook.publishTime = source.readInt();
60
61   return mBook;
62
63   }
64
65   public Book[] newArray(int size) {
66
67   return new Book[size];
68
69   }
70
71   };
72
73   public int describeContents() {
74
75   return 0;
76
77   }
78
79   public void writeToParcel(Parcel parcel, int flags) {
80
81   parcel.writeString(bookName);
82
83   parcel.writeString(author);
84
85   parcel.writeInt(publishTime);
86
87   }
88
89   }
90

 

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
1 package com.test.tutor.objecttran;
2
3   import android.app.Activity;
4
5   import android.content.Intent;
6
7   import android.os.Bundle;
8
9   import android.view.View;
10
11   import android.view.View.OnClickListener;
12
13   import android.widget.Button;
14
15   public class ObjectTranDemo extends Activity implements OnClickListener {
16
17   private Button sButton,pButton;
18
19   public final static String SER_KEY = "com.tutor.objecttran.ser";
20
21   public final static String PAR_KEY = "com.tutor.objecttran.par";
22
23 public void onCreate(Bundle savedInstanceState) {
24
25   super.onCreate(savedInstanceState);
26
27   setContentView(R.layout.main);
28
29   setupViews();
30
31   }
32
33
34   public void setupViews(){
35
36   sButton = (Button)findViewById(R.id.button1);
37
38   pButton = (Button)findViewById(R.id.button2);
39
40   sButton.setOnClickListener(this);
41
42   pButton.setOnClickListener(this);
43
44   }
45
46   //Serializeable传递对象的方法
47
48   public void SerializeMethod(){
49
50   Person mPerson = new Person();
51
52   mPerson.setName("frankie");
53
54   mPerson.setAge(25);
55
56   Intent mIntent = new Intent(this,ObjectTranDemo1.class);
57
58   Bundle mBundle = new Bundle();
59
60   mBundle.putSerializable(SER_KEY,mPerson);
61
62   mIntent.putExtras(mBundle);
63
64   startActivity(mIntent);
65
66   }
67
68   //Pacelable传递对象方法
69
70   public void PacelableMethod(){
71
72   Book mBook = new Book();
73
74   mBook.setBookName("Android Tutor");
75
76   mBook.setAuthor("Frankie");
77
78   mBook.setPublishTime(2010);
79
80   Intent mIntent = new Intent(this,ObjectTranDemo2.class);
81
82   Bundle mBundle = new Bundle();
83
84   mBundle.putParcelable(PAR_KEY, mBook);
85
86   mIntent.putExtras(mBundle);
87
88   startActivity(mIntent);
89
90   }
91
92   //铵钮点击事件响应
93
94   public void onClick(View v) {
95
96   if(v == sButton){
97
98   SerializeMethod();
99
100   }else{
101
102   PacelableMethod();
103
104   }
105
106   }
107
108   }
109

 

代码
1  package com.test.tutor.objecttran;
2
3   import android.app.Activity;
4
5   import android.content.Intent;
6
7   import android.os.Bundle;
8
9   import android.view.View;
10
11   import android.view.View.OnClickListener;
12
13   import android.widget.Button;
14
15   public class ObjectTranDemo extends Activity implements OnClickListener {
16
17
18
19   private Button sButton,pButton;
20
21   public final static String SER_KEY = "com.tutor.objecttran.ser";
22
23   public final static String PAR_KEY = "com.tutor.objecttran.par";
24
25   public void onCreate(Bundle savedInstanceState) {
26
27   super.onCreate(savedInstanceState);
28
29   setContentView(R.layout.main);
30
31   setupViews();
32
33   }
34
35   public void setupViews(){
36
37   sButton = (Button)findViewById(R.id.button1);
38
39   pButton = (Button)findViewById(R.id.button2);
40
41   sButton.setOnClickListener(this);
42
43   pButton.setOnClickListener(this);
44
45   }
46
47   //Serializeable传递对象的方法
48
49   public void SerializeMethod(){
50
51   Person mPerson = new Person();
52
53   mPerson.setName("frankie");
54
55   mPerson.setAge(25);
56
57   Intent mIntent = new Intent(this,ObjectTranDemo1.class);
58
59   Bundle mBundle = new Bundle();
60
61   mBundle.putSerializable(SER_KEY,mPerson);
62
63   mIntent.putExtras(mBundle);
64
65   startActivity(mIntent);
66
67   }
68
69   //Pacelable传递对象方法
70
71   public void PacelableMethod(){
72
73   Book mBook = new Book();
74
75   mBook.setBookName("Android Tutor");
76
77   mBook.setAuthor("Frankie");
78
79   mBook.setPublishTime(2010);
80
81   Intent mIntent = new Intent(this,ObjectTranDemo2.class);
82
83   Bundle mBundle = new Bundle();
84
85   mBundle.putParcelable(PAR_KEY, mBook);
86
87   mIntent.putExtras(mBundle);
88
89   startActivity(mIntent);
90
91   }
92
93   //铵钮点击事件响应
94
95   public void onClick(View v) {
96
97   if(v == sButton){
98
99   SerializeMethod();
100
101   }else{
102
103   PacelableMethod();
104
105   }
106
107   }
108
109   }
110

 

代码
1 package com.test.tutor.objecttran;
2
3   import android.app.Activity;
4 import android.os.Bundle;
5   import android.widget.TextView;
6
7   public class ObjectTranDemo1 extends Activity {
8
9   @Override
10
11   public void onCreate(Bundle savedInstanceState) {
12
13   super.onCreate(savedInstanceState);
14
15   TextView mTextView = new TextView(this);
16
17   Person mPerson = (Person)getIntent().getSerializableExtra(ObjectTranDemo.SER_KEY);
18
19   mTextView.setText("You name is: " + mPerson.getName() + ""+
20
21   "You age is: " + mPerson.getAge());
22
23   setContentView(mTextView);
24
25   }
26
27   }
28

 

代码
1 package com.test.tutor.objecttran;
2
3   import android.app.Activity;
4
5   import android.os.Bundle;
6
7   import android.widget.TextView;
8
9   public class ObjectTranDemo1 extends Activity {
10
11   @Override
12
13   public void onCreate(Bundle savedInstanceState) {
14
15   super.onCreate(savedInstanceState);
16
17   TextView mTextView = new TextView(this);
18
19   Person mPerson = (Person)getIntent().getSerializableExtra(ObjectTranDemo.SER_KEY);
20
21   mTextView.setText("You name is: " + mPerson.getName() + ""+
22
23   "You age is: " + mPerson.getAge());
24
25   setContentView(mTextView);
26
27   }
28
29   }
30

 

代码
1 package com.test.tutor.objecttran;
2
3   import android.app.Activity;
4
5   import android.os.Bundle;
6
7   import android.widget.TextView;
8
9   public class ObjectTranDemo2 extends Activity {
10
11   public void onCreate(Bundle savedInstanceState) {
12
13   super.onCreate(savedInstanceState);
14
15   TextView mTextView = new TextView(this);
16
17   Book mBook = (Book)getIntent().getParcelableExtra(ObjectTranDemo.PAR_KEY);
18
19   mTextView.setText("Book name is: " + mBook.getBookName()+""+
20
21   "Author is: " + mBook.getAuthor() + "" +
22
23   "PublishTime is: " + mBook.getPublishTime()); setContentView(mTextView);
24
25   }
26
27   }
28

 

代码
1  package com.test.tutor.objecttran;
2
3   import android.app.Activity;
4
5   import android.os.Bundle;
6
7   import android.widget.TextView;
8
9   public class ObjectTranDemo2 extends Activity {
10
11   public void onCreate(Bundle savedInstanceState) {
12
13   super.onCreate(savedInstanceState);
14
15   TextView mTextView = new TextView(this);
16
17   Book mBook = (Book)getIntent().getParcelableExtra(ObjectTranDemo.PAR_KEY);
18
19   mTextView.setText("Book name is: " + mBook.getBookName()+""+
20
21   "Author is: " + mBook.getAuthor() + "" +
22
23   "PublishTime is: " + mBook.getPublishTime());
24
25   setContentView(mTextView);
26
27   }
28
29   }
30

 

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
1   < ?xml version="1.0" encoding="utf-8"?>
2
3   < manifest xmlns:android="http://schemas.android.com/apk/res/android"
4
5   package="com.test.tutor.objecttran"
6
7   android:versionCode="1"
8
9   android:versionName="1.0">
10
11   < application android:icon="@drawable/icon" android:label="@string/app_name">
12
13   < activity android:name=".ObjectTranDemo"
14
15   android:label="@string/app_name">
16
17   < intent-filter>
18
19   < action android:name="android.intent.action.MAIN" />
20
21   < category android:name="android.intent.category.LAUNCHER" />
22
23   < /intent-filter>
24
25   < /activity>
26
27   < activity android:name=".ObjecttestDemo1">< /activity>
28
29   < activity android:name=".ObjecttestDemo2">< /activity>
30
31   < /application>
32
33   < uses-sdk android:minSdkVersion="7" />
34
35   < /manifest>
36
37   < ?xml version="1.0" encoding="utf-8"?>
38
39  < manifest xmlns:android="http://schemas.android.com/apk/res/android"
40
41   package="com.test.tutor.objecttran"
42
43   android:versionCode="1"
44
45   android:versionName="1.0">
46
47   < application android:icon="@drawable/icon" android:label="@string/app_name">
48
49   < activity android:name=".ObjectTranDemo"
50
51   android:label="@string/app_name">
52
53   < intent-filter>
54
55   < action android:name="android.intent.action.MAIN" />
56
57   < category android:name="android.intent.category.LAUNCHER" />
58
59   < /intent-filter>
60
61   < /activity>
62
63   < activity android:name=".ObjecttestDemo1">< /activity>
64
65   < activity android:name=".ObjecttestDemo2">< /activity>
66
67   < /application>
68
69   < uses-sdk android:minSdkVersion="7" />
70
71   < /manifest>
72

 再接下来就是编译,运行看效果了哈!!!