devbox
weixin_40725706
这个屌丝很懒，什么也没留下！
关注作者
热门标签
热门文章
当前位置:   article > 正文

Android studio 简易计算器App的实现及实现加减乘除功能（附完整源码）_安卓加减乘除源码

作者：weixin_40725706 | 2024-03-27 15:59:13

赞

踩

安卓加减乘除源码

        在Android studio 实现简易计算器App并实现加减乘除功能

结果

activity_main.xml

  1. <?xml version="1.0" encoding="utf-8"?>
  2. <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
  3.  
  4.     android:layout_width="match_parent"
  5.     android:layout_height="match_parent"
  6.     android:orientation="vertical"
  7.     android:paddingBottom="10dp"
  8.     android:paddingLeft="10dp"
  9.     android:paddingRight="10dp"
  10.     android:paddingTop="10dp">
  11.  
  12.     <EditText
  13.         android:id="@+id/et_result"
  14.         android:hint="请输入数字"
  15.         android:layout_width="match_parent"
  16.         android:layout_height="100dp"
  17.         android:layout_gravity="left"
  18.         android:gravity="right"
  19.         android:textSize="50sp" />
  20.  
  21.     <GridLayout
  22.         android:layout_width="match_parent"
  23.         android:layout_height="match_parent"
  24.         android:background="@drawable/sz"
  25.         android:layout_gravity="center"
  26.         android:orientation="horizontal"
  27.         android:columnCount="4"
  28.         android:rowCount="5">
  29.  
  30.         <Button
  31.             android:id="@+id/btn_clear"
  32.             android:layout_columnSpan="3"
  33.             android:layout_gravity="fill_horizontal"
  34.             android:text="C                   DEL"
  35.             android:layout_rowWeight="1"
  36.             android:textSize="26sp" />
  37.         <Button
  38.             android:id="@+id/btn_div"
  39.             android:text="÷"
  40.             android:layout_rowWeight="1"
  41.             android:textSize="26sp" />
  42.         <Button
  43.             android:id="@+id/btn_1"
  44.             android:text="1"
  45.             android:layout_rowWeight="1"
  46.             android:textSize="26sp"/>
  47.         <Button
  48.             android:id="@+id/btn_2"
  49.             android:text="2"
  50.             android:layout_rowWeight="1"
  51.             android:textSize="26sp" />
  52.         <Button
  53.             android:id="@+id/btn_3"
  54.             android:text="3"
  55.             android:layout_rowWeight="1"
  56.             android:textSize="26sp" />
  57.         <Button
  58.             android:id="@+id/btn_add"
  59.             android:text="+"
  60.             android:layout_rowWeight="1"
  61.             android:textSize="26sp" />
  62.         <Button
  63.             android:id="@+id/btn_4"
  64.             android:text="4"
  65.             android:layout_rowWeight="1"
  66.             android:textSize="26sp" />
  67.         <Button
  68.             android:id="@+id/btn_5"
  69.             android:text="5"
  70.             android:layout_rowWeight="1"
  71.             android:textSize="26sp" />
  72.         <Button
  73.             android:id="@+id/btn_6"
  74.             android:text="6"
  75.             android:layout_rowWeight="1"
  76.             android:textSize="26sp" />
  77.         <Button
  78.             android:id="@+id/btn_sub"
  79.             android:text="-"
  80.             android:layout_rowWeight="1"
  81.             android:textSize="26sp" />
  82.         <Button
  83.             android:id="@+id/btn_7"
  84.             android:text="7"
  85.             android:layout_rowWeight="1"
  86.             android:textSize="26sp" />
  87.         <Button
  88.             android:id="@+id/btn_8"
  89.             android:text="8"
  90.             android:layout_rowWeight="1"
  91.             android:textSize="26sp" />
  92.         <Button
  93.             android:id="@+id/btn_9"
  94.             android:text="9"
  95.             android:layout_rowWeight="1"
  96.             android:textSize="26sp" />
  97.         <Button
  98.             android:id="@+id/btn_mul"
  99.             android:text="×"
  100.             android:layout_rowWeight="1"
  101.             android:textSize="26sp" />
  102.         <Button
  103.             android:id="@+id/btn_0"
  104.             android:text="0"
  105.             android:layout_rowWeight="1"
  106.             android:textSize="26sp" />
  107.         <Button
  108.             android:id="@+id/btn_dot"
  109.             android:text="."
  110.             android:layout_rowWeight="1"
  111.             android:textSize="26sp" />
  112.         <Button
  113.             android:id="@+id/btn_equ"
  114.             android:text="="
  115.             android:layout_rowWeight="1"
  116.             android:layout_columnSpan="2"
  117.             android:layout_gravity="fill_horizontal"
  118.             android:textSize="26sp" />
  119.  
  120.     </GridLayout>
  121.  
  122. </LinearLayout>

MainActivity.java

  1. package com.example.a86189.szcounter;
  2.  
  3. import android.support.v7.app.AppCompatActivity;
  4. import android.os.Bundle;
  5. import android.view.View;
  6. import android.widget.Button;
  7. import android.widget.EditText;
  8.  
  9. public class MainActivity extends AppCompatActivity {
  10.  
  11.     Button btn1; // 数字1
  12.     Button btn2; // 数字2
  13.     Button btn3; // 数字3
  14.     Button btn4; // 数字4
  15.     Button btn5; // 数字5
  16.     Button btn6; // 数字6
  17.     Button btn7; // 数字7
  18.     Button btn8; // 数字8
  19.     Button btn9; // 数字9
  20.     Button btn0; // 数字0
  21.     Button add; // +号
  22.     Button sub; // -号
  23.     Button mul; // *号
  24.     Button div; // 除号
  25.     Button dot; // 小数点
  26.     Button equ; // =号
  27.     Button clear; //清除
  28.     EditText result; // 显示文本
  29.  
  30.     double num1 = 0, num2 = 0; //计算的数字
  31.     double Result = 0;//计算结果
  32.     int op = 0;//判断操作符
  33.     String opd = " ";//显示操作符
  34.  
  35.     @Override
  36.     protected void onCreate(Bundle savedInstanceState) {
  37.         super.onCreate(savedInstanceState);
  38.         setContentView(R.layout.activity_main);
  39.  
  40.         // 获取页面上的控件
  41.         btn1 = (Button) findViewById(R.id.btn_1);
  42.         btn2 = (Button)findViewById(R.id.btn_2);
  43.         btn3 = (Button)findViewById(R.id.btn_3);
  44.         btn4 = (Button)findViewById(R.id.btn_4);
  45.         btn5 = (Button)findViewById(R.id.btn_5);
  46.         btn6 = (Button)findViewById(R.id.btn_6);
  47.         btn7 = (Button)findViewById(R.id.btn_7);
  48.         btn8 = (Button)findViewById(R.id.btn_8);
  49.         btn9 = (Button)findViewById(R.id.btn_9);
  50.         btn0 = (Button)findViewById(R.id.btn_0);
  51.         add =  (Button)findViewById(R.id.btn_add);
  52.         sub =  (Button)findViewById(R.id.btn_sub);
  53.         mul =  (Button)findViewById(R.id.btn_mul);
  54.         div =  (Button)findViewById(R.id.btn_div);
  55.         equ =  (Button)findViewById(R.id.btn_equ);
  56.         dot =  (Button)findViewById(R.id.btn_dot);
  57.         clear =(Button) findViewById(R.id.btn_clear);
  58.         result =(EditText)  findViewById(R.id.et_result);
  59.  
  60.         // 按钮的单击事件
  61.         btn1.setOnClickListener(new Click());
  62.         btn2.setOnClickListener(new Click());
  63.         btn3.setOnClickListener(new Click());
  64.         btn4.setOnClickListener(new Click());
  65.         btn5.setOnClickListener(new Click());
  66.         btn6.setOnClickListener(new Click());
  67.         btn7.setOnClickListener(new Click());
  68.         btn8.setOnClickListener(new Click());
  69.         btn9.setOnClickListener(new Click());
  70.         btn0.setOnClickListener(new Click());
  71.         add.setOnClickListener(new Click());
  72.         sub.setOnClickListener(new Click());
  73.         mul.setOnClickListener(new Click());
  74.         div.setOnClickListener(new Click());
  75.         equ.setOnClickListener(new Click());
  76.         dot.setOnClickListener(new Click());
  77.         clear.setOnClickListener(new Click());
  78.         result.setOnClickListener(new Click());
  79.     }
  80.  
  81.     // 设置按钮点击后的监听
  82.     class Click implements View.OnClickListener {
  83.         public void onClick(View v) {
  84.             switch (v.getId()) {                //switch循环获取点击按钮后的值
  85.                 case R.id.btn_0:                //获取，0-9、小数点，并在编辑框显示
  86.                     String myString = result.getText().toString();
  87.                     myString += "0";
  88.                     result.setText(myString);
  89.                     break;
  90.                 case R.id.btn_1:
  91.                     String myString1 = result.getText().toString();
  92.                     myString1 += "1";
  93.                     result.setText(myString1);
  94.                     break;
  95.                 case R.id.btn_2:
  96.                     String myString2 = result.getText().toString();
  97.                     myString2 += "2";
  98.                     result.setText(myString2);
  99.                     break;
  100.                 case R.id.btn_3:
  101.                     String myString3 = result.getText().toString();
  102.                     myString3 += "3";
  103.                     result.setText(myString3);
  104.                     break;
  105.                 case R.id.btn_4:
  106.                     String myString4 = result.getText().toString();
  107.                     myString4 += "4";
  108.                     result.setText(myString4);
  109.                     break;
  110.                 case R.id.btn_5:
  111.                     String myString5 = result.getText().toString();
  112.                     myString5 += "5";
  113.                     result.setText(myString5);
  114.                     break;
  115.                 case R.id.btn_6:
  116.                     String myString6 = result.getText().toString();
  117.                     myString6 += "6";
  118.                     result.setText(myString6);
  119.                     break;
  120.                 case R.id.btn_7:
  121.                     String myString7 = result.getText().toString();
  122.                     myString7 += "7";
  123.                     result.setText(myString7);
  124.                     break;
  125.                 case R.id.btn_8:
  126.                     String myString8 = result.getText().toString();
  127.                     myString8 += "8";
  128.                     result.setText(myString8);
  129.                     break;
  130.                 case R.id.btn_9:
  131.                     String myString9 = result.getText().toString();
  132.                     myString9 += "9";
  133.                     result.setText(myString9);
  134.                     break;
  135.                 case R.id.btn_dot:
  136.                     String myStringDot = result.getText().toString();
  137.                     myStringDot += ".";
  138.                     result.setText(myStringDot);
  139.                     break;
  140.                 case R.id.btn_add:             //判断，使用加减乘除的操作符
  141.                     String myStringAdd = result.getText().toString();
  142.                     if (myStringAdd.equals(null)) {
  143.                         return;
  144.                     }
  145.                     num1 = Double.valueOf(myStringAdd);
  146.                     result.setText(null);
  147.                     op = 1;
  148.                     opd = "+";
  149.                     break;
  150.                 case R.id.btn_sub:
  151.                     String myStringSub = result.getText().toString();
  152.                     if (myStringSub.equals(null)) {
  153.                         return;
  154.                     }
  155.                     num1 = Double.valueOf(myStringSub);
  156.                     result.setText(null);
  157.                     op = 2;
  158.                     opd = "-";
  159.                     break;
  160.                 case R.id.btn_mul:
  161.                     String myStringMul = result.getText().toString();
  162.                     if (myStringMul.equals(null)) {
  163.                         return;
  164.                     }
  165.                     num1 = Double.valueOf(myStringMul);
  166.                     result.setText(null);
  167.                     op = 3;
  168.                     opd = "×";
  169.                     break;
  170.                 case R.id.btn_div:
  171.                     String myStringDiv = result.getText().toString();
  172.                     if (myStringDiv.equals(null)) {
  173.                         return;
  174.                     }
  175.                     num1 = Double.valueOf(myStringDiv);
  176.                     result.setText(null);
  177.                     op = 4;
  178.                     opd = "÷";
  179.                     break;
  180.                 case R.id.btn_clear:                 //清除，将编辑框文本显示为空
  181.                     result.setText(null);
  182.                     break;
  183.                 case R.id.btn_equ:                   //计算，以操作符为判断，选择所需的运算，并将结果输出
  184.                     String myStringEqu = result.getText().toString();
  185.                     if (myStringEqu.equals(null)) {
  186.                         return;
  187.                     }
  188.                     num2 = Double.valueOf(myStringEqu);
  189.                     result.setText(null);
  190.                     switch (op) {
  191.                         case 0:
  192.                             Result = num2;
  193.                             break;
  194.                         case 1:
  195.                             Result = num1 + num2;
  196.                             break;
  197.                         case 2:
  198.                             Result = num1 - num2;
  199.                             break;
  200.                         case 3:
  201.                             Result = num1 * num2;
  202.                             break;
  203.                         case 4:
  204.                             if (num2 == 0)                //除法中分子与分母之分
  205.                                 Result = 0;
  206.                             else
  207.                                 Result = num1 / num2;
  208.                             break;
  209.                         default:
  210.                             Result = 0;
  211.                             break;
  212.                     }
  213.                     result.setText(Double.toString(num1) + opd + Double.toString(num2) + "=" + Double.toString(Result));    //将结果完整输出
  214.                     break;
  215.                 default:
  216.                     break;
  217.             }
  218.         }
  219.     }
  220. }

⭐⭐⭐持续更新.....

⭐⭐⭐每天提醒自己，自己就是个菜鸡！

⭐⭐⭐如果对您有帮助留下的每一个点赞、收藏、关注是对菜鸡创作的最大鼓励❀

⭐⭐⭐有相关问题可以写在评论区，一起学习，一起进步。

声明：本文内容由网友自发贡献，不代表【wpsshop博客】立场，版权归原作者所有，本站不承担相应法律责任。如您发现有侵权的内容，请联系我们。转载请注明出处：https://www.wpsshop.cn/w/weixin_40725706/article/detail/325289
推荐阅读
相关标签

Copyright © 2003-2013 www.wpsshop.cn 版权所有，并保留所有权利。