<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_e06_caculate.MainActivity" >

     <EditText

         android:id="@+id/m_multiplier"

         android:layout_width="match_parent"

         android:layout_height="wrap_content"

         android:inputType="text"/>

     <EditText

         android:id="@+id/m_multiplicand"

         android:layout_width="match_parent"

         android:layout_height="wrap_content"

         android:layout_below="@id/m_multiplier"

         android:inputType="number"/>

     <Button

         android:id="@+id/caculateBtn"

         android:layout_width="match_parent"

         android:layout_height="wrap_content"

         android:text="@string/caculate"

         android:layout_below="@id/m_multiplicand"/>

 </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">

     <TextView

         android:layout_width="match_parent"

         android:layout_height="wrap_content"

         android:id="@+id/accumulateText"

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

 </RelativeLayout>

 package com.example.s01_original_e06_caculate;

 import android.app.Activity;

 import android.content.Intent;

 import android.os.Bundle;

 import android.view.Menu;

 import android.view.MenuItem;

 import android.view.View;

 import android.view.View.OnClickListener;

 import android.widget.Button;

 import android.widget.EditText;

 public class MainActivity extends Activity {

     private Button caculateBtn = null;

     private EditText multiplierView = null;

     private EditText multiplicandViwe = null;

     @Override

     protected void onCreate(Bundle savedInstanceState) {

         super.onCreate(savedInstanceState);

         setContentView(R.layout.activity_main);

         multiplierView = (EditText) findViewById(R.id.m_multiplier);

         multiplicandViwe = (EditText) findViewById(R.id.m_multiplicand);

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

         caculateBtn.setOnClickListener(new OnClickListener() {

             @Override

             public void onClick(View v) {

                 Intent intent = new Intent();

                 intent.putExtra("multiplier", multiplierView.getText().toString());

                 intent.putExtra("multiplicand", multiplicandViwe.getText().toString());

                 intent.setClass(MainActivity.this, ResultActivity.class);

                 MainActivity.this.startActivity(intent);

             }

         });

     }

     @Override

     public boolean onCreateOptionsMenu(Menu menu) {

         menu.add(0, 1, 1, R.string.exit);

         menu.add(0, 2, 2, R.string.about);

         return super.onCreateOptionsMenu(menu);

     }

     @Override

     public boolean onOptionsItemSelected(MenuItem item) {

         switch (item.getItemId()) {

         case 1:

             finish();

             return true;

         default:

             System.out.println("关于程序");

             break;

         }

         return super.onOptionsItemSelected(item);

     }

 }

 package com.example.s01_original_e06_caculate;

 import android.app.Activity;

 import android.content.Intent;

 import android.os.Bundle;

 import android.widget.TextView;

 public class ResultActivity extends Activity {

     private TextView accumulateTextView = null;

     @Override

     protected void onCreate(Bundle savedInstanceState) {

         super.onCreate(savedInstanceState);

         setContentView(R.layout.resultactivity);

         accumulateTextView = (TextView) findViewById(R.id.accumulateText);

         Intent intent = getIntent();

         int multiplier = Integer.parseInt(intent.getStringExtra("multiplier"));

         int multiplicand = Integer.parseInt(intent.getStringExtra("multiplicand"));

         accumulateTextView.setText((multiplier * multiplicand) + "");

     }

 }