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   1: <?xml version="1.0" encoding="utf-8"?>

   2: <resources>

   3:  

   4:     <string name="app_name">ArithmeticTest</string>

   5:     <string name="action_settings">Settings</string>

   6:     <string name="hello_world">Hello world!</string>

   7:     <string name="InputFirstNumber">輸入第一個數字</string>

   8:     <string name="InputSecondNumber">輸入第二個數字</string>

   9:     <string name="CalResult">計算結果</string>

  10:     <string name="Addition">+</string>

  11:     <string name="Subtraction">-</string>

  12:     <string name="Multiplication">x</string>

  13:     <string name="Division">/</string>

  14:     

  15: </resources>

   1: package com.example.arithmetictest;

   2:  

   3: import android.os.Bundle;

   4: import android.app.Activity;

   5: import android.view.Menu;

   6: //------------------------------------------------------

   7: import android.view.View;

   8: import android.view.View.OnClickListener;

   9: import android.widget.Button;

  10: import android.widget.TextView;

  11: import android.widget.EditText;

  12: //------------------------------------------------------

   1: public class MainActivity extends Activity {

   2:     //---------------------------------------------------

   3:     private TextView view    = null;    // 資訊顯示 

   4:     private TextView note    = null;    // 提示 

   5:     private EditText edtNum1 = null;    // 數字1 

   6:     private EditText edtNum2 = null;    // 數字2

   7:     private Button   btnAdd  = null;    // 加法按鈕

   8:     private Button   btnSub  = null;    // 剪髮按鈕 

   9:     private Button   btnMul  = null;    // 乘法按鈕

  10:     private Button   btnDiv  = null;    // 除法按鈕

  11:     private int      num1    = 0;       // 儲存第一個數字

  12:     private int      num2    = 0;       // 儲存第二個數字 

  13:     //---------------------------------------------------

   1:  

   2:         this.edtNum1.setOnClickListener(new OnClickListener(){

   3:             @Override

   4:             public void onClick(View v){

   5:                 MainActivity.this.edtNum1.setText("");    // 清除文字

   6:             }

   7:         

   8:         });

   9:         this.edtNum2.setOnClickListener(new OnClickListener(){

  10:             @Override

  11:             public void onClick(View v)

  12:             {

  13:                 MainActivity.this.edtNum2.setText("");    // 清除文字

  14:             }

  15:         });

  16:         this.btnAdd.setOnClickListener(new OnClickListener(){

  17:             @Override

  18:             public void onClick(View v){

  19:                 MainActivity.this.num1 = Integer.parseInt(MainActivity.this.edtNum1.getText().toString());

  20:                 MainActivity.this.num2 = Integer.parseInt(MainActivity.this.edtNum2.getText().toString());

  21:                 MainActivity.this.note.setText("+");

  22:                 MainActivity.this.view.setText(String.valueOf(num1+num2));

  23:             }

  24:         });

  25:         this.btnSub.setOnClickListener(new OnClickListener(){

  26:             @Override

  27:             public void onClick(View v)

  28:             {

  29:                 MainActivity.this.num1 = Integer.parseInt(MainActivity.this.edtNum1.getText().toString());

  30:                 MainActivity.this.num2 = Integer.parseInt(MainActivity.this.edtNum2.getText().toString());

  31:                 MainActivity.this.note.setText("-");

  32:                 MainActivity.this.view.setText(String.valueOf(num1-num2));                

  33:             }

  34:         });

  35:         this.btnMul.setOnClickListener(new OnClickListener(){

  36:             @Override

  37:             public void onClick(View v){

  38:                 MainActivity.this.num1 = Integer.parseInt(MainActivity.this.edtNum1.getText().toString());

  39:                 MainActivity.this.num2 = Integer.parseInt(MainActivity.this.edtNum2.getText().toString());

  40:                 MainActivity.this.note.setText("*");

  41:                 MainActivity.this.view.setText(String.valueOf(num1*num2));

  42:             }

  43:         });

  44:         this.btnDiv.setOnClickListener(new OnClickListener(){

  45:             @Override

  46:             public void onClick(View v)

  47:             {

  48:                 MainActivity.this.num1 = Integer.parseInt(MainActivity.this.edtNum1.getText().toString());

  49:                 MainActivity.this.num2 = Integer.parseInt(MainActivity.this.edtNum2.getText().toString());

  50:                 MainActivity.this.note.setText("/");

  51:                 MainActivity.this.view.setText(String.valueOf(num1/num2));                

  52:             }

  53:         });

  54:         //---------------------------------------------------