Android Bundle Class

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

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)

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

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

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

The complete code is as follows:

    <?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>          <uses-sdk android:minsdkversion=" 7 "/>      </manifest>   

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

Class 1:testbundle class:

    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 Stub Intent Intent = new Intent ();                        Intent.setclass (Testbundle.this, Target.class);                        Bundle Mbundle = new bundle (); Mbundle.putstring ("Data", "data from TesTbundle ");//press-in Data Intent.putextras (Mbundle);                  StartActivity (Intent);              }              };          Button1.setonclicklistener (CL);     }      }

Class 2:target

    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);                <span style= "color: #ff6600;" >bundle Bundle = Getintent (). Getextras ();   </span>//Received bundle               String data = bundle.getstring ("data");//read out data                 settitle;                  }        }    

Layout file:

Main.xml

    <?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

<?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

    <?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:

Ext.: http://www.cnblogs.com/xiaoruhan/archive/2012/03/02/2377117.html