Android pass values ​​between multiple activities

package ;

import ;
import ;
import ;
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public class MainActivity extends Activity {
    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        (savedInstanceState);
        setContentView();
        Button button =(Button)findViewById();
        (new () {

//Register the click event for the button and open a new activity
         @Override
   public void onClick(View v) {
    // TODO Auto-generated method stub
//Set the component to be activated for the Intent (the Activity of TheOtherActivity will be activated)
    Intent intent =new Intent(,);//
//Writing method 1 (, );//Set the component to be activated
//Writing method two (new ComponentName(, ));//Set the component to be activated

//The first way to pass values ​​(the code looks more concise)
    /*
    ("name", "dinglang");
      ("age", 22);
      */
//The second way of transferring value
    Bundle bundle =new Bundle();
    ("name", "dinglang");
    ("age", 22);
    (bundle);
    /*
Intent provides various putExtra() methods after common types overloading, such as: putExtra(String name, String value), putExtra(String name, long value). In the putExtra() method, it will determine whether there is a Bundle object inside the current Intent object. If it does not exist, a new Bundle object will be created. The value passed in the future by calling the putExtra() method will be stored in the Bundle object.
These can actually be viewed through the source code, and the internal implementation principles are the same
     */
//startActivity(intent);//You can directly activate it without receiving the return value of the component.
//Return result needs to be received. Pay attention to the returned result code
    startActivityForResult(intent, 100);
         }
  });
    }

 @Override
 protected void onActivityResult(int requestCode, int resultCode, Intent data) {
  // TODO Auto-generated method stub

(this, ("result"), 1).show();//Get the return result
  (requestCode, resultCode, data);
 }
}

package ;

import ;
import ;
import ;
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public class TheOtherActivity extends Activity {

 @Override
 protected void onCreate(Bundle savedInstanceState) {
  // TODO Auto-generated method stub
  (savedInstanceState);
setContentView();//Set the xml layout file corresponding to this activity
Intent intent =();//Get her intention to activate
  String name =("name");
int age=().getInt("age");//The second way of value selection
  TextView textView = (TextView)();
("Name: "+ name+"  Age: "+ age);
  Button button = (Button)();
  (new () {

//Return the result to the previous Activity
   @Override
   public void onClick(View v) {
    // TODO Auto-generated method stub
    Intent intent =new Intent();
("result", "This is the result of processing");
setResult(20, intent);//Set return data
finish();//Close activity
   }
  });
 }

}

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:andro
    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="wrap_content"
     android:layout_height="wrap_content"
android:text="Open OtherActivity"
     android:
     />
</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout
  xmlns:andro
  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="This is OtherActivity"
    android:
    />

      <Button 
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
android:text="Close Activity"
    android:
    />
</LinearLayout>

<?xml version="1.0" encoding="utf-8"?>
<manifest xmlns:andro
      package=""
      android:versionCode="1"
      android:versionName="1.0">
    <uses-sdk android:minSdkVersion="8" />

    <application android:icon="@drawable/icon" android:label="@string/app_name">
        <activity android:name=".MainActivity"
                  android:label="@string/app_name">
            <intent-filter>
                <action android:name="" />
                <category android:name="" />
            </intent-filter>
        </activity>
<!-- Note that --> should be added to the project list file
<activity android:name="TheOtherActivity" android:label="the other Activity"/>
    </application>
</manifest>