Android Bundle Class

Today I found that I didn't even know the bundle, so I took the time to study it.

According to Google's official documentation (HTTP://DEVELOPER.ANDROID.COM/REFERENCE/ANDROID/OS/BUNDLE.HTML)

The bundle class is a key-value pair, "a mapping from String values to various parcelable types."

Class inheritance Relationships:

Java.lang.Object Android.os.Bundle
The bundle class is a final class: Public final class Bundle extends Objectimplements parcelable cloneable

Communication between the two activity can be achieved through the bundle class, which is:

(1) Create a new bundle class

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1. Bundle Mbundle = new Bundle ();

(2) The bundle class to add data (key-value form, the other activity inside the data, it is necessary to use key, to find the corresponding value)

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1. Mbundle.putstring ("Data", "data from Testbundle");

Mbundle.putstring ("Data", "Data from Testbundle");

(3) Create a new intent object and add the bundle to the intent object

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1. Intent Intent = new Intent ();
2. Intent.setclass (Testbundle. This, Target.    class);
3. Intent.putextras (Mbundle);

Intent Intent = new Intent ();  Intent.setclass (Testbundle.this, target.class);  Intent.putextras (Mbundle);

The complete code is as follows:

Android Mainfest.xml are as follows:

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2. <?xml version="1.0" encoding="Utf-8"?>
4. <manifest xmlns:android="Http://schemas.android.com/apk/res/android"
6. package="Com.tencent.test"
8. android:versioncode="1"
10. Android:versionname="1.0" >
12. <application android:icon="@drawable/icon" android:label="@string/app_name" >
14. <activity android:name=". Testbundle "
16. Android:label="@string/app_name" >
18. <intent-filter>
20. <action android:name="Android.intent.action.MAIN"/>
22. <category android:name="Android.intent.category.LAUNCHER"/>
24. </intent-filter>
26. </activity>
28. <activity android:name=". Target "></activity>
30. </application>
32. <USES-SDK android:minsdkversion="7"/>
34. </manifest>

<?xml version= "1.0" encoding= "Utf-8"? ><manifest xmlns:android= "http://schemas.android.com/apk/res/ Android "      package=" com.tencent.test "      android:versioncode=" 1 "      android:versionname=" 1.0 ">    < Application android:icon= "@drawable/icon" android:label= "@string/app_name" >        <activity android:name= ". Testbundle "                  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= ". Target "></activity>    </application>    

The two classes are as follows: Intent from the Testbundle class to the target class.

Class 1:testbundle class:

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2. Import android.app.Activity;
4. Import android.content.Intent;
6. Import Android.os.Bundle;
8. Import Android.view.View;
10. Import Android.view.View.OnClickListener;
12. Import Android.widget.Button;
16. Public class Testbundle extends Activity {
20. private Button button1;
22. private Onclicklistener cl;
24. public void OnCreate (Bundle savedinstancestate) {
26. super.oncreate (savedinstancestate);
28. Setcontentview (R.layout.main);
32. Button1 = (Button) Findviewbyid (R.id.button1);
34. CL = New Onclicklistener () {
36. @Override
38. public void OnClick (View arg0) {
40. //TODO auto-generated method stub
42. Intent Intent = new Intent ();
44. Intent.setclass (Testbundle. This, Target.    class);
46. Bundle Mbundle = new Bundle ();
48. Mbundle.putstring ("Data", "data from Testbundle"); Press-in data
50. Intent.putextras (Mbundle);
52. StartActivity (Intent);
54. }
56. };
58. Button1.setonclicklistener (CL);
60. }
62. }

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 Testbundle extends Activity {  private Button button1;private Onclicklistener cl;     public void OnCreate (Bundle savedinstancestate) {      super.oncreate (savedinstancestate);      Setcontentview (r.layout.main);            Button1 = (Button) Findviewbyid (r.id.button1);    CL = new Onclicklistener () {    @Override public    void OnClick (View arg0) {//TODO auto-generated method Stubintent in Tent = new Intent ();  Intent.setclass (Testbundle.this, target.class);  Bundle Mbundle = new bundle ();  Mbundle.putstring ("Data", "Data from Testbundle"), or//press-in  Intent.putextras (mbundle);  StartActivity (intent);}        };        Button1.setonclicklistener (CL);}    }  

Class 2:target

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2. Import android.app.Activity;
4. Import Android.os.Bundle;
8. Public class Target extends activity{
12. public void OnCreate (Bundle savedinstancestate) {
16. super.oncreate (savedinstancestate);
18. Setcontentview (R.layout.target);
20. <span style="Color:rgb (255, 102, 0);   >bundle Bundle = Getintent (). Getextras (); </span> //Get bundles sent
22. String data = bundle.getstring ("data"); Read the data
24. Settitle (data);
28. }
30. }

Import android.app.Activity;  Import Android.os.Bundle;  public class Target extends activity{public      void OnCreate (Bundle savedinstancestate) {              super.oncreate ( Savedinstancestate);          Setcontentview (r.layout.target);          Bundle bundle = Getintent (). Getextras ();    Get the bundle        String data = bundle.getstring ("data");//read out data          settitle;      }  }  

Layout file:

Main.xml

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2. <?xml version="1.0" encoding="Utf-8"?>
4. <linearlayout xmlns:android="Http://schemas.android.com/apk/res/android"
6. android:orientation="Vertical"
8. Android:layout_width="Fill_parent"
10. android:layout_height="Fill_parent"
12. >
14. <textview
16. Android:layout_width="Fill_parent"
18. android:layout_height="Wrap_content"
20. android:text="@string/hello"
22. />
24. <button
26. Android:layout_width="Fill_parent"
28. android:layout_height="Wrap_content"
30. android:text="@string/button"
32. Android:id = "@+id/button1"
34. />
36. </LinearLayout>

<?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=" @string/hello "    /><button      android:layout_width=" Fill_parent "     android:layout_height= "Wrap_content"     android:text= "@string/button"    android:id = "@+id/button1"    / > </LinearLayout>

Target.xml

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2. <?xml version="1.0" encoding="Utf-8"?>
4. <linearlayout xmlns:android="Http://schemas.android.com/apk/res/android"
6. android:orientation="Vertical"
8. Android:layout_width="Fill_parent"
10. android:layout_height="Fill_parent"
12. >
14. <textview
16. Android:layout_width="Fill_parent"
18. android:layout_height="Wrap_content"
20. android:text="@string/target"
22. />
24. </LinearLayout>

<?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=" @string/target "    /></linearlayout>

String.xml

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1. <?xml version= "1.0"  encoding= "Utf-8"? >  
2. <resources>  
3.     <string name= "Hello" >hello world,  testbundle!</string>  
4.     <string name= "app_name" > Test bundle Usage </string>  
5.      <string name= "button" > click Jump </string>  
6.     <string name=
7. </RESOURCES>&NBSP;&NBSP;

<?xml version= "1.0" encoding= "Utf-8"?><resources> <string    name= "Hello" >hello world, testbundle!</string>    <string name= "app_name" > Test bundle Usage </string>    <string name= " Button "> Click Jump </string>    <string name=" target "> Come to target activity</string></resources >

Results:

Jump results:

 

Copyright NOTICE: This article for Bo Master original article, without Bo Master permission not reproduced.

Android Bundle Class