實現兩個數的相加

main.xml

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="fill_parent"
    android:layout_height="fill_parent"
    android:orientation="vertical" >

      <EditText
        android:id="@+id/e1"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:inputType="number"
         />

       
    <TextView
        android:layout_width="fill_parent"
        android:layout_height="wrap_content"
        android:text="乘以" />

    <EditText
        android:id="@+id/e2"
        android:layout_width="match_parent"
        android:layout_height="wrap_content"
        android:inputType="number"
         />
    <Button
        android:id="@+id/button1"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:text="提交" />

 
  

</LinearLayout>

 

two.xml

 

<?xml version="1.0" encoding="utf-8"?>
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical" >

    <EditText
       
        android:layout_width="match_parent"
    android:layout_height="wrap_content"
    android:id="@+id/t3"
       
        />
</LinearLayout>

 

PlussActivity.java

package cn.class3g.activity;

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 PlussActivity extends Activity {
//實現倆個數的相加
 EditText e1,e2;
 Button button=null;
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);
       
     e1=   (EditText) this.findViewById(R.id.e1);
     e2=   (EditText) this.findViewById(R.id.e2);
      button=(Button) this.findViewById(R.id.button1);
    
     button.setOnClickListener(new Mylistener());
       
    }
   
   
 public boolean onCreateOptionsMenu(Menu menu) {
  menu.add(0, 1, 1, "退出");
  menu.add(0, 2, 2, "退出2");
  return super.onCreateOptionsMenu(menu);
 }

 public boolean onOptionsItemSelected(MenuItem item) {
       if(item.getItemId()==1){
   
       
   this.finish();
   }
  return super.onOptionsItemSelected(item);
   }

 class Mylistener implements OnClickListener{

  
  public void onClick(View v) {
   String e1str= e1.getText().toString();
         String e2str= e2.getText().toString();
  
   Intent intent= new Intent();
   
   intent.putExtra("one", e1str);
   intent.putExtra("two", e2str);
   intent.setClass(PlussActivity.this, SecondActivity.class );
   
   PlussActivity.this.startActivity(intent);
   
  }
     
     
     
    }
   
   
   
}

 

SecondActivity.java

package cn.class3g.activity;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;

import android.util.Log;
import android.widget.EditText;

public class SecondActivity extends Activity {

 
 EditText t3=null;
 private static final String TAg="TAG";
 protected void onCreate(Bundle savedInstanceState) {
 
  super.onCreate(savedInstanceState);
  
  setContentView(R.layout.two);
  
   t3=  (EditText) this.findViewById(R.id.t3);
  
  
  Intent intent= getIntent();
  
     String onestr= intent.getStringExtra("one");
  String twostr=intent.getStringExtra("two");
  Log.i(TAg, onestr);
  int oneint=Integer.parseInt(onestr);
  
  int twoint=Integer.parseInt(twostr);
  
  int result=oneint+twoint;
  
  t3.setText(result+"");
  
 }

 
 
}