<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

     xmlns:tools="http://schemas.android.com/tools"

     android:layout_width="match_parent"

     android:layout_height="match_parent"

     android:paddingBottom="@dimen/activity_vertical_margin"

     android:paddingLeft="@dimen/activity_horizontal_margin"

     android:paddingRight="@dimen/activity_horizontal_margin"

     android:paddingTop="@dimen/activity_vertical_margin"

     tools:context="com.example.s01_original_e05_intent.MainActivity" >

     <TextView

         android:layout_width="wrap_content"

         android:layout_height="wrap_content"

         android:text="@string/hello_world" />

     <Button

         android:id="@+id/mBtn"

         android:layout_width="wrap_content"

         android:layout_height="wrap_content"

         android:text="@string/btnText"/>

 </RelativeLayout>

 <RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

     xmlns:tools="http://schemas.android.com/tools"

     android:layout_width="match_parent"

     android:layout_height="match_parent"

     android:paddingBottom="@dimen/activity_vertical_margin"

     android:paddingLeft="@dimen/activity_horizontal_margin"

     android:paddingRight="@dimen/activity_horizontal_margin"

     android:paddingTop="@dimen/activity_vertical_margin"

     tools:context="com.example.s01_original_e05_intent.OtherActivity" >

     <TextView

         android:id="@+id/otherView"

         android:layout_width="wrap_content"

         android:layout_height="wrap_content"

         android:text="这是另一个activity" />

 </RelativeLayout>

 package com.example.s01_original_e05_intent;

 import android.app.Activity;

 import android.content.Intent;

 import android.net.Uri;

 import android.os.Bundle;

 import android.view.View;

 import android.view.View.OnClickListener;

 import android.widget.Button;

 public class MainActivity extends Activity {

     private Button mBtn = null;

     @Override

     protected void onCreate(Bundle savedInstanceState) {

         super.onCreate(savedInstanceState);

         setContentView(R.layout.activity_main);

         mBtn = (Button) findViewById(R.id.mBtn);

         mBtn.setOnClickListener(new btnListener());

     }

     public class btnListener implements OnClickListener {

         @Override

         public void onClick(View v) {

             /*Intent intent = new Intent();

             intent.putExtra("extraKey", "Extra中的值123");

             intent.setClass(MainActivity.this, OtherActivity.class);*/

             //intent也可以在不同项目的activity间传递数据，如跳转到发短信

             Uri uri = Uri.parse("smsto://10086");

             Intent intent = new Intent(Intent.ACTION_SENDTO, uri);

             intent.putExtra("sms_body", "我当前的话费余额是多少？");

             MainActivity.this.startActivity(intent);

         }

     }

 }

 package com.example.s01_original_e05_intent;

 import android.app.Activity;

 import android.content.Intent;

 import android.os.Bundle;

 import android.widget.TextView;

 public class OtherActivity extends Activity {

     @Override

     protected void onCreate(Bundle savedInstanceState) {

         super.onCreate(savedInstanceState);

         setContentView(R.layout.activity_ohter);

         Intent intent = getIntent();

         TextView otherView = (TextView) findViewById(R.id.otherView);

         otherView.setText(intent.getStringExtra("extraKey"));

     }

 }