基于自制宫格布局的MyCalculator[我的计算器][API V6].md · sunxiaoyu/HarmonyOS应用开发项目集合

<h1>基于自制宫格布局的MyCalculator[我的计算器][API V6]</h1>

# 1. 名称
- 将本次项目app命名为：我的计算器、MyCalculator。
- 项目已经放在Gitee仓库中：[MyCalculator](https://gitee.com/tdtxyzhh/harmonyos-applicationset/tree/master/MyCalculator)

# 2. app图标

![在这里插入图片描述](https://img-blog.csdnimg.cn/2702c4ac11874191aad2760d069d5ac6.png#pic_center)

# 3. app实现关键技巧
- **app划分为上、下两部分，其中上部是一个Text组件，下部是一个自制宫格组件**。
- 实现**n×m宫格布局**（表格式）：首先，将宫格按照行数，设置**n个竖直放置的DirectionalLayout**，然后在**其中的每个设置m个水平放置的DirectionalLayout**，即可实现自己想要的表格样式。
- 实现表达式的数学求解：**首先**，将获取到的字符串进行预处理执行preDo()函数，使得一个完整的字符串提取出操作数和运算符，按照原有顺序放置在ArrayList中。**其次**，根据该list执行其中的乘法和除法操作。**之后**，根据该list执行其中的减法和加法操作。最后，就会得到该表达式的值。【**全部运算采用BigDecimal类中的加减乘除函数**】
- 被除数是0问题：将异常逐渐抛出，直到抛至“=”的单击事件中，进行异常处理，详情见代码。

# 4. 源代码
# &nbsp;&nbsp;4.0 项目工程文件结构
![在这里插入图片描述](https://img-blog.csdnimg.cn/c075809722694f0d86d9d710d6a7b1f9.png?x-oss-process=image/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAVERUWA==,size_18,color_FFFFFF,t_70,g_se,x_16)

# &nbsp;&nbsp;4.1 java源代码
## &nbsp;&nbsp;&nbsp;4.1.1 MyArgumentException.java

```java
package com.tdtxdcxm.mycalculator.slice.myexception;

public class MyArgumentException extends Exception{
    public MyArgumentException(String s) {
        super(s);
    }
}
```

## &nbsp;&nbsp;&nbsp;4.1.2 CalCulatorGo.java

```java
package com.tdtxdcxm.mycalculator.slice.util;

import com.tdtxdcxm.mycalculator.slice.myexception.MyArgumentException;
import ohos.agp.components.Text;

import java.math.BigDecimal;
import java.math.RoundingMode;
import java.util.ArrayList;

class StructArrayListType{
    int type = -1;
    String value = "";
    public static Text displaytext;
    public StructArrayListType(String value){
        this.value = value;
        generateType();
    }

public void setValue(String value) {
        this.value = value;
    }

public void generateType(){
        if(value.equals("")){
            return;
        }
        if(value.length() == 1){
            switch (value) {
                case "÷":
                    type = 1;
                    break;
                case "×":
                    type = 2;
                    break;
                case "-":
                    type = 3;
                    break;
                case "+":
                    type = 4;
                    break;
                default:
                    type = 0;
                    break;
            }
            return;
        }

if(value.indexOf("/") != -1){
            int i = value.indexOf("/");

String a = value.substring(0,i);

BigDecimal bigDecimal_a = new BigDecimal(a);
            BigDecimal bigDecimal_b = new BigDecimal("100");

double t = bigDecimal_a.divide(bigDecimal_b,15, RoundingMode.HALF_UP).doubleValue();
            value = String.valueOf(t);
        }
        type = 0;
    }

public String toString(){
        return "type is "+type+","+"value is "+value;
    }
}

public class CalCulatorGo{
    public static Text displaytext;
    private static final String[] type = {"number","÷","×","-","+",".","%"};
    private String express = "";
    private final ArrayList<StructArrayListType> expersslist = new ArrayList<>();

public CalCulatorGo(String express) throws MyArgumentException {
        if(express.equals("")){
            throw new MyArgumentException("计算的表达式为空！");
        }
        this.express = express;
        StructArrayListType.displaytext = displaytext;
    }

public void preDo(){
        //将表达式字符串按照数字和运算符每个单独提取出来按照原顺序放入expersslist
        StringBuilder stringBuilder = new StringBuilder();
        int operationsigncount = 0;
        for(int i = 0;i < express.length();i++){
            char ch = express.charAt(i);
            if((ch >= '0' && ch <= '9') || ch == '.' || ch == '%'){
                if(ch == '%'){
                    stringBuilder.append("/100");
                }
                else {
                    stringBuilder.append(ch);
                }
                operationsigncount = 0;
                continue;
            }

if(operationsigncount != 2){
                operationsigncount++;

if(operationsigncount == 2){
                    stringBuilder.append(ch);
                    continue;
                }

expersslist.add(new StructArrayListType(stringBuilder.toString()));
                stringBuilder.delete(0,stringBuilder.length());
                stringBuilder.append(ch);

if(operationsigncount != 2){
                    expersslist.add(new StructArrayListType(stringBuilder.toString()));
                    stringBuilder.delete(0,stringBuilder.length());
                }
                continue;
            }
            stringBuilder.append(ch);
        }
        expersslist.add(new StructArrayListType(stringBuilder.toString()));

checklist();
    }

public void doMutAndDiv() throws ArithmeticException{
        if(expersslist.size() == 0){
            return;
        }
        for(int i = 0;i < expersslist.size();i++){
            if(expersslist.get(i).type == 1 || expersslist.get(i).type == 2){
                double result = dofinalwork(i);
                //System.out.println("result is "+result);

expersslist.get(i+1).setValue(String.valueOf(result));

StructArrayListType structArrayListType1 = expersslist.get(i - 1);
                StructArrayListType structArrayListType2 = expersslist.get(i);

expersslist.remove(structArrayListType1);
                expersslist.remove(structArrayListType2);
                i = 0;
            }
        }
        //checklist();
    }

public double doSubAndAdd(){
        for (int i = 0; i < expersslist.size(); i++) {
            if(expersslist.get(i).type == 3 || expersslist.get(i).type == 4){
                double result = dofinalwork(i);
                //System.out.println("result is "+result);

expersslist.get(i+1).setValue(String.valueOf(result));
                StructArrayListType structArrayListType1 = expersslist.get(i - 1);
                StructArrayListType structArrayListType2 = expersslist.get(i);

expersslist.remove(structArrayListType1);
                expersslist.remove(structArrayListType2);
                i = 0;
            }
        }
        //checklist();
        return Double.parseDouble(expersslist.get(0).value);
    }

public double doAllOperation() throws ArithmeticException{
        preDo();
        doMutAndDiv();
        return doSubAndAdd();
    }

public double dofinalwork(int i) throws ArithmeticException{

String a = expersslist.get(i - 1).value;
        String b = expersslist.get(i + 1).value;

BigDecimal bigDecimal_a = new BigDecimal(a);
        BigDecimal bigDecimal_b = new BigDecimal(b);

switch (expersslist.get(i).type) {
            case 1:
                return bigDecimal_a.divide(bigDecimal_b, 15,RoundingMode.HALF_UP).doubleValue();
            case 2:
                return bigDecimal_a.multiply(bigDecimal_b).doubleValue();
            case 3:
                return bigDecimal_a.subtract(bigDecimal_b).doubleValue();
            case 4:
                return bigDecimal_a.add(bigDecimal_b).doubleValue();
            default:
                break;
        }
        return -0.0000000;
    }

public void checklist(){
        System.out.println("<___________________________");
        for(int i = 0;i < expersslist.size();i++){
            System.out.println(expersslist.get(i).toString());
        }
        System.out.println("___________________________>");
    }

}
```

## &nbsp;&nbsp;&nbsp;4.1.3 MainAbilitySlice.java

```java
package com.tdtxdcxm.mycalculator.slice;

import com.tdtxdcxm.mycalculator.ResourceTable;
import com.tdtxdcxm.mycalculator.slice.myexception.MyArgumentException;
import com.tdtxdcxm.mycalculator.slice.util.CalCulatorGo;
import ohos.aafwk.ability.AbilitySlice;
import ohos.aafwk.content.Intent;
import ohos.agp.colors.RgbColor;
import ohos.agp.components.Component;
import ohos.agp.components.Text;
import ohos.agp.components.element.ShapeElement;
import ohos.multimodalinput.event.TouchEvent;

public class MainAbilitySlice extends AbilitySlice {
    private Text displaytext;
    private Text clear,percentage,backspace,division;
    private Text one,two,three,multiplication;
    private Text four,five,six,subtraction;
    private Text seven,eight,nine,addition;
    private Text zero,doublezero,point,equalsign;

public void initMASComponents(){
        displaytext = (Text) findComponentById(ResourceTable.Id_displaytext);

clear = (Text) findComponentById(ResourceTable.Id_clear);
        percentage = (Text) findComponentById(ResourceTable.Id_percentage);
        backspace = (Text) findComponentById(ResourceTable.Id_backspace);
        division = (Text) findComponentById(ResourceTable.Id_division);

one = (Text) findComponentById(ResourceTable.Id_one);
        two = (Text) findComponentById(ResourceTable.Id_two);
        three = (Text) findComponentById(ResourceTable.Id_three);
        multiplication = (Text) findComponentById(ResourceTable.Id_multiplication);

four = (Text) findComponentById(ResourceTable.Id_four);
        five = (Text) findComponentById(ResourceTable.Id_five);
        six = (Text) findComponentById(ResourceTable.Id_six);
        subtraction = (Text) findComponentById(ResourceTable.Id_subtraction);

seven = (Text) findComponentById(ResourceTable.Id_seven);
        eight = (Text) findComponentById(ResourceTable.Id_eight);
        nine = (Text) findComponentById(ResourceTable.Id_nine);
        addition = (Text) findComponentById(ResourceTable.Id_addition);

zero = (Text) findComponentById(ResourceTable.Id_zero);
        doublezero = (Text) findComponentById(ResourceTable.Id_doublezero);
        point = (Text) findComponentById(ResourceTable.Id_point);
        equalsign = (Text) findComponentById(ResourceTable.Id_equalsign);

/************************************first-row*********************************/
        clear.setClickedListener(new Component.ClickedListener() {
            @Override
            public void onClick(Component component) {
                displaytext.setText("");
            }
        });
        clear.setTouchEventListener(new Component.TouchEventListener() {
            @Override
            public boolean onTouchEvent(Component component, TouchEvent touchEvent) {
                int i = touchEvent.getAction();
                if(i ==  TouchEvent.PRIMARY_POINT_DOWN){
                    ShapeElement shapeElement = new ShapeElement();
                    shapeElement.setShape(1);
                    shapeElement.setRgbColor(new RgbColor(187, 255, 255));

clear.setBackground(shapeElement);
                }
                if(i == TouchEvent.PRIMARY_POINT_UP){
                    ShapeElement shapeElement = new ShapeElement();
                    shapeElement.setRgbColor(new RgbColor(214, 253, 227));

clear.setBackground(shapeElement);
                    }
                return true;
            }
        });

percentage.setClickedListener(new Component.ClickedListener() {
            @Override
            public void onClick(Component component) {
                String s = displaytext.getText();
                if(s.equals("")){
                    return;
                }
                if(     s.charAt(s.length() - 1) == '÷'
                        || s.charAt(s.length() - 1) == '×'
                        || s.charAt(s.length() - 1) == '+'
                        || s.charAt(s.length() - 1) == '-'
                        || s.charAt(s.length() - 1) == '%'
                        || s.charAt(s.length() - 1) == '.'){
                    return;
                }

displaytext.append("%");
            }
        });
        percentage.setTouchEventListener(new Component.TouchEventListener() {
            @Override
            public boolean onTouchEvent(Component component, TouchEvent touchEvent) {
                int i = touchEvent.getAction();
                if(i ==  TouchEvent.PRIMARY_POINT_DOWN){
                    ShapeElement shapeElement = new ShapeElement();
                    shapeElement.setShape(1);
                    shapeElement.setRgbColor(new RgbColor(187, 255, 255));

percentage.setBackground(shapeElement);
                }
                if(i == TouchEvent.PRIMARY_POINT_UP){
                    ShapeElement shapeElement = new ShapeElement();
                    shapeElement.setRgbColor(new RgbColor(214, 253, 227));

percentage.setBackground(shapeElement);
                }
                return true;
            }
        });

backspace.setClickedListener(new Component.ClickedListener() {
            @Override
            public void onClick(Component component) {
                //displaytext.delete(1);//API 7编译，运行在API 7的机器里才有效果

String s = displaytext.getText();

if(s.equals("")){
                    return;
                }
                displaytext.setText(s.substring(0,s.length() - 1));

}
        });
        backspace.setTouchEventListener(new Component.TouchEventListener() {
            @Override
            public boolean onTouchEvent(Component component, TouchEvent touchEvent) {
                int i = touchEvent.getAction();
                if(i ==  TouchEvent.PRIMARY_POINT_DOWN){
                    ShapeElement shapeElement = new ShapeElement();
                    shapeElement.setShape(1);
                    shapeElement.setRgbColor(new RgbColor(187, 255, 255));

backspace.setBackground(shapeElement);
                }
                if(i == TouchEvent.PRIMARY_POINT_UP){
                    ShapeElement shapeElement = new ShapeElement();
                    shapeElement.setRgbColor(new RgbColor(214, 253, 227));

backspace.setBackground(shapeElement);
                }
                return true;
            }
        });

division.setClickedListener(new Component.ClickedListener() {
            @Override
            public void onClick(Component component) {
                String s = displaytext.getText();
                if(s.equals("")){
                    return;
                }
                if(     s.charAt(s.length() - 1) == '÷'
                        || s.charAt(s.length() - 1) == '×'
                        || s.charAt(s.length() - 1) == '+'
                        || s.charAt(s.length() - 1) == '-'
                        || s.charAt(s.length() - 1) == '.'){
                    return;
                }

displaytext.append("÷");
            }
        });
        division.setTouchEventListener(new Component.TouchEventListener() {
            @Override
            public boolean onTouchEvent(Component component, TouchEvent touchEvent) {
                int i = touchEvent.getAction();
                if(i ==  TouchEvent.PRIMARY_POINT_DOWN){
                    ShapeElement shapeElement = new ShapeElement();
                    shapeElement.setShape(1);
                    shapeElement.setRgbColor(new RgbColor(187, 255, 255));

division.setBackground(shapeElement);
                }
                if(i == TouchEvent.PRIMARY_POINT_UP){
                    ShapeElement shapeElement = new ShapeElement();
                    shapeElement.setRgbColor(new RgbColor(214, 253, 227));

division.setBackground(shapeElement);
                }
                return true;
            }
        });
        /************************************first-row*********************************/

/************************************second-row*********************************/
        one.setClickedListener(new Component.ClickedListener() {
            @Override
            public void onClick(Component component) {
                displaytext.append("1");
            }
        });
        one.setTouchEventListener(new Component.TouchEventListener() {
            @Override
            public boolean onTouchEvent(Component component, TouchEvent touchEvent) {
                int i = touchEvent.getAction();
                if(i ==  TouchEvent.PRIMARY_POINT_DOWN){
                    ShapeElement shapeElement = new ShapeElement();
                    shapeElement.setShape(1);
                    shapeElement.setRgbColor(new RgbColor(187, 255, 255));

one.setBackground(shapeElement);
                }
                if(i == TouchEvent.PRIMARY_POINT_UP){
                    ShapeElement shapeElement = new ShapeElement();
                    shapeElement.setRgbColor(new RgbColor(207, 241, 243));

one.setBackground(shapeElement);
                }
                return true;
            }
        });

two.setClickedListener(new Component.ClickedListener() {
            @Override
            public void onClick(Component component) {
                displaytext.append("2");
            }
        });
        two.setTouchEventListener(new Component.TouchEventListener() {
            @Override
            public boolean onTouchEvent(Component component, TouchEvent touchEvent) {
                int i = touchEvent.getAction();
                if(i ==  TouchEvent.PRIMARY_POINT_DOWN){
                    ShapeElement shapeElement = new ShapeElement();
                    shapeElement.setShape(1);
                    shapeElement.setRgbColor(new RgbColor(187, 255, 255));

two.setBackground(shapeElement);
                }
                if(i == TouchEvent.PRIMARY_POINT_UP){
                    ShapeElement shapeElement = new ShapeElement();
                    shapeElement.setRgbColor(new RgbColor(207, 241, 243));

two.setBackground(shapeElement);
                }
                return true;
            }
        });

three.setClickedListener(new Component.ClickedListener() {
            @Override
            public void onClick(Component component) {
                displaytext.append("3");
            }
        });
        three.setTouchEventListener(new Component.TouchEventListener() {
            @Override
            public boolean onTouchEvent(Component component, TouchEvent touchEvent) {
                int i = touchEvent.getAction();
                if(i ==  TouchEvent.PRIMARY_POINT_DOWN){
                    ShapeElement shapeElement = new ShapeElement();
                    shapeElement.setShape(1);
                    shapeElement.setRgbColor(new RgbColor(187, 255, 255));

three.setBackground(shapeElement);
                }
                if(i == TouchEvent.PRIMARY_POINT_UP){
                    ShapeElement shapeElement = new ShapeElement();
                    shapeElement.setRgbColor(new RgbColor(207, 241, 243));

three.setBackground(shapeElement);
                }
                return true;
            }
        });

multiplication.setClickedListener(new Component.ClickedListener() {
            @Override
            public void onClick(Component component) {
                String s = displaytext.getText();
                if(s.equals("")){
                    return;
                }
                if(     s.charAt(s.length() - 1) == '÷'
                        || s.charAt(s.length() - 1) == '×'
                        || s.charAt(s.length() - 1) == '+'
                        || s.charAt(s.length() - 1) == '-'
                        || s.charAt(s.length() - 1) == '.'){
                    return;
                }
                displaytext.append("×");
            }
        });
        multiplication.setTouchEventListener(new Component.TouchEventListener() {
            @Override
            public boolean onTouchEvent(Component component, TouchEvent touchEvent) {
                int i = touchEvent.getAction();
                if(i ==  TouchEvent.PRIMARY_POINT_DOWN){
                    ShapeElement shapeElement = new ShapeElement();
                    shapeElement.setShape(1);
                    shapeElement.setRgbColor(new RgbColor(187, 255, 255));

multiplication.setBackground(shapeElement);
                }
                if(i == TouchEvent.PRIMARY_POINT_UP){
                    ShapeElement shapeElement = new ShapeElement();
                    shapeElement.setRgbColor(new RgbColor(207, 241, 243));

multiplication.setBackground(shapeElement);
                }
                return true;
            }
        });
        /************************************second-row*********************************/

/************************************three-row*********************************/
        four.setClickedListener(new Component.ClickedListener() {
            @Override
            public void onClick(Component component) {
                displaytext.append("4");
            }
        });
        four.setTouchEventListener(new Component.TouchEventListener() {
            @Override
            public boolean onTouchEvent(Component component, TouchEvent touchEvent) {
                int i = touchEvent.getAction();
                if(i ==  TouchEvent.PRIMARY_POINT_DOWN){
                    ShapeElement shapeElement = new ShapeElement();
                    shapeElement.setShape(1);
                    shapeElement.setRgbColor(new RgbColor(187, 255, 255));

four.setBackground(shapeElement);
                }
                if(i == TouchEvent.PRIMARY_POINT_UP){
                    ShapeElement shapeElement = new ShapeElement();
                    shapeElement.setRgbColor(new RgbColor(237, 253, 255));

four.setBackground(shapeElement);
                }
                return true;
            }
        });

five.setClickedListener(new Component.ClickedListener() {
            @Override
            public void onClick(Component component) {
                displaytext.append("5");
            }
        });
        five.setTouchEventListener(new Component.TouchEventListener() {
            @Override
            public boolean onTouchEvent(Component component, TouchEvent touchEvent) {
                int i = touchEvent.getAction();
                if(i ==  TouchEvent.PRIMARY_POINT_DOWN){
                    ShapeElement shapeElement = new ShapeElement();
                    shapeElement.setShape(1);
                    shapeElement.setRgbColor(new RgbColor(187, 255, 255));

five.setBackground(shapeElement);
                }
                if(i == TouchEvent.PRIMARY_POINT_UP){
                    ShapeElement shapeElement = new ShapeElement();
                    shapeElement.setRgbColor(new RgbColor(237, 253, 255));

five.setBackground(shapeElement);
                }
                return true;
            }
        });

six.setClickedListener(new Component.ClickedListener() {
            @Override
            public void onClick(Component component) {
                displaytext.append("6");
            }
        });
        six.setTouchEventListener(new Component.TouchEventListener() {
            @Override
            public boolean onTouchEvent(Component component, TouchEvent touchEvent) {
                int i = touchEvent.getAction();
                if(i ==  TouchEvent.PRIMARY_POINT_DOWN){
                    ShapeElement shapeElement = new ShapeElement();
                    shapeElement.setShape(1);
                    shapeElement.setRgbColor(new RgbColor(187, 255, 255));

six.setBackground(shapeElement);
                }
                if(i == TouchEvent.PRIMARY_POINT_UP){
                    ShapeElement shapeElement = new ShapeElement();
                    shapeElement.setRgbColor(new RgbColor(237, 253, 255));

six.setBackground(shapeElement);
                }
                return true;
            }
        });

subtraction.setClickedListener(new Component.ClickedListener() {
            @Override
            public void onClick(Component component) {
                String s = displaytext.getText();
                if(s.equals("")){
                    return;
                }
                if(s.charAt(s.length() - 1) == '.'){
                    return;
                }
                if(s.length() >= 3
                        && s.charAt(s.length() - 1) == '-'
                        && s.charAt(s.length() - 1 - 1) == '-'){
                    return;
                }
                displaytext.append("-");
            }
        });
        subtraction.setTouchEventListener(new Component.TouchEventListener() {
            @Override
            public boolean onTouchEvent(Component component, TouchEvent touchEvent) {
                int i = touchEvent.getAction();
                if(i ==  TouchEvent.PRIMARY_POINT_DOWN){
                    ShapeElement shapeElement = new ShapeElement();
                    shapeElement.setShape(1);
                    shapeElement.setRgbColor(new RgbColor(187, 255, 255));

subtraction.setBackground(shapeElement);
                }
                if(i == TouchEvent.PRIMARY_POINT_UP){
                    ShapeElement shapeElement = new ShapeElement();
                    shapeElement.setRgbColor(new RgbColor(237, 253, 255));

subtraction.setBackground(shapeElement);
                }
                return true;
            }
        });
        /************************************third-row*********************************/

/************************************fourth-row*********************************/
        seven.setClickedListener(new Component.ClickedListener() {
            @Override
            public void onClick(Component component) {
                displaytext.append("7");
            }
        });
        seven.setTouchEventListener(new Component.TouchEventListener() {
            @Override
            public boolean onTouchEvent(Component component, TouchEvent touchEvent) {
                int i = touchEvent.getAction();
                if(i ==  TouchEvent.PRIMARY_POINT_DOWN){
                    ShapeElement shapeElement = new ShapeElement();
                    shapeElement.setShape(1);
                    shapeElement.setRgbColor(new RgbColor(187, 255, 255));

seven.setBackground(shapeElement);
                }
                if(i == TouchEvent.PRIMARY_POINT_UP){
                    ShapeElement shapeElement = new ShapeElement();
                    shapeElement.setRgbColor(new RgbColor(237, 248, 250));

seven.setBackground(shapeElement);
                }
                return true;
            }
        });

eight.setClickedListener(new Component.ClickedListener() {
            @Override
            public void onClick(Component component) {
                displaytext.append("8");
            }
        });
        eight.setTouchEventListener(new Component.TouchEventListener() {
            @Override
            public boolean onTouchEvent(Component component, TouchEvent touchEvent) {
                int i = touchEvent.getAction();
                if(i ==  TouchEvent.PRIMARY_POINT_DOWN){
                    ShapeElement shapeElement = new ShapeElement();
                    shapeElement.setShape(1);
                    shapeElement.setRgbColor(new RgbColor(187, 255, 255));

eight.setBackground(shapeElement);
                }
                if(i == TouchEvent.PRIMARY_POINT_UP){
                    ShapeElement shapeElement = new ShapeElement();
                    shapeElement.setRgbColor(new RgbColor(237, 248, 250));

eight.setBackground(shapeElement);
                }
                return true;
            }
        });

nine.setClickedListener(new Component.ClickedListener() {
            @Override
            public void onClick(Component component) {
                displaytext.append("9");
            }
        });
        nine.setTouchEventListener(new Component.TouchEventListener() {
            @Override
            public boolean onTouchEvent(Component component, TouchEvent touchEvent) {
                int i = touchEvent.getAction();
                if(i ==  TouchEvent.PRIMARY_POINT_DOWN){
                    ShapeElement shapeElement = new ShapeElement();
                    shapeElement.setShape(1);
                    shapeElement.setRgbColor(new RgbColor(187, 255, 255));

nine.setBackground(shapeElement);
                }
                if(i == TouchEvent.PRIMARY_POINT_UP){
                    ShapeElement shapeElement = new ShapeElement();
                    shapeElement.setRgbColor(new RgbColor(237, 248, 250));

nine.setBackground(shapeElement);
                }
                return true;
            }
        });

addition.setClickedListener(new Component.ClickedListener() {
            @Override
            public void onClick(Component component) {
                String s = displaytext.getText();
                if(s.equals("")){
                    return;
                }
                if(     s.charAt(s.length() - 1) == '÷'
                        || s.charAt(s.length() - 1) == '×'
                        || s.charAt(s.length() - 1) == '+'
                        || s.charAt(s.length() - 1) == '-'
                        || s.charAt(s.length() - 1) == '.'){
                    return;
                }

displaytext.append("+");
            }
        });
        addition.setTouchEventListener(new Component.TouchEventListener() {
            @Override
            public boolean onTouchEvent(Component component, TouchEvent touchEvent) {
                int i = touchEvent.getAction();
                if(i ==  TouchEvent.PRIMARY_POINT_DOWN){
                    ShapeElement shapeElement = new ShapeElement();
                    shapeElement.setShape(1);
                    shapeElement.setRgbColor(new RgbColor(187, 255, 255));

addition.setBackground(shapeElement);
                }
                if(i == TouchEvent.PRIMARY_POINT_UP){
                    ShapeElement shapeElement = new ShapeElement();
                    shapeElement.setRgbColor(new RgbColor(237, 248, 250));

addition.setBackground(shapeElement);
                }
                return true;
            }
        });
        /************************************fourth-row*********************************/

/************************************fifth-row*********************************/
        zero.setClickedListener(new Component.ClickedListener() {
            @Override
            public void onClick(Component component) {
                displaytext.append("0");
            }
        });
        zero.setTouchEventListener(new Component.TouchEventListener() {
            @Override
            public boolean onTouchEvent(Component component, TouchEvent touchEvent) {
                int i = touchEvent.getAction();
                if(i ==  TouchEvent.PRIMARY_POINT_DOWN){
                    ShapeElement shapeElement = new ShapeElement();
                    shapeElement.setShape(1);
                    shapeElement.setRgbColor(new RgbColor(187, 255, 255));

zero.setBackground(shapeElement);
                }
                if(i == TouchEvent.PRIMARY_POINT_UP){
                    ShapeElement shapeElement = new ShapeElement();
                    shapeElement.setRgbColor(new RgbColor(247, 249, 250));

zero.setBackground(shapeElement);
                }
                return true;
            }
        });

doublezero.setClickedListener(new Component.ClickedListener() {
            @Override
            public void onClick(Component component) {
                displaytext.append("00");
            }
        });
        doublezero.setTouchEventListener(new Component.TouchEventListener() {
            @Override
            public boolean onTouchEvent(Component component, TouchEvent touchEvent) {
                int i = touchEvent.getAction();
                if(i ==  TouchEvent.PRIMARY_POINT_DOWN){
                    ShapeElement shapeElement = new ShapeElement();
                    shapeElement.setShape(1);
                    shapeElement.setRgbColor(new RgbColor(187, 255, 255));

doublezero.setBackground(shapeElement);
                }
                if(i == TouchEvent.PRIMARY_POINT_UP){
                    ShapeElement shapeElement = new ShapeElement();
                    shapeElement.setRgbColor(new RgbColor(247, 249, 250));

doublezero.setBackground(shapeElement);
                }
                return true;
            }
        });

point.setClickedListener(new Component.ClickedListener() {
            @Override
            public void onClick(Component component) {
                String s = displaytext.getText();
                if(s.equals("")){
                    return;
                }
                if(     s.charAt(s.length() - 1) == '÷'
                        || s.charAt(s.length() - 1) == '×'
                        || s.charAt(s.length() - 1) == '+'
                        || s.charAt(s.length() - 1) == '-'
                        || s.charAt(s.length() - 1) == '%'
                        || s.charAt(s.length() - 1) == '.'){
                    return;
                }
                displaytext.append(".");
            }
        });
        point.setTouchEventListener(new Component.TouchEventListener() {
            @Override
            public boolean onTouchEvent(Component component, TouchEvent touchEvent) {
                int i = touchEvent.getAction();
                if(i ==  TouchEvent.PRIMARY_POINT_DOWN){
                    ShapeElement shapeElement = new ShapeElement();
                    shapeElement.setShape(1);
                    shapeElement.setRgbColor(new RgbColor(187, 255, 255));

point.setBackground(shapeElement);
                }
                if(i == TouchEvent.PRIMARY_POINT_UP){
                    ShapeElement shapeElement = new ShapeElement();
                    shapeElement.setRgbColor(new RgbColor(247, 249, 250));

point.setBackground(shapeElement);
                }
                return true;
            }
        });

equalsign.setClickedListener(new Component.ClickedListener() {
            @Override
            public void onClick(Component component) {
                String s = displaytext.getText();
                if(s.equals("")){
                    return;
                }
                char lastchar = s.charAt(s.length() - 1);
                char firstchar = s.charAt(0);
                boolean haveoperate = false;
                if(     lastchar == '÷'
                        || lastchar == '×'
                        || lastchar == '+'
                        || lastchar == '-'
                        || lastchar == '.'
                        || firstchar == '-'){
                    displaytext.setText("表达式错误！");
                    return;
                }

for(int i = 0;i < s.length();i++){
                    char ch = s.charAt(i);
                    if(     ch == '÷'
                            || ch == '×'
                            || ch == '+'
                            || ch == '-'
                            || ch == '%'){
                        haveoperate = true;
                        break;
                    }
                }
                if(!haveoperate){
                    return;
                }
                else{
                    //System.out.println("这里了！");
                    CalCulatorGo calCulatorGo = null;
                    try {
                        calCulatorGo = new CalCulatorGo(s);
                    } catch (MyArgumentException e) {
                        e.printStackTrace();
                    }

try{
                        assert calCulatorGo != null;
                        double finalresult = calCulatorGo.doAllOperation();
                        displaytext.setText(""+finalresult);
                    }
                    catch (ArithmeticException e){
                        displaytext.setText("算术异常！");
                        e.printStackTrace();
                    }

//calCulatorGo.checklist();
                }

}
        });
        equalsign.setTouchEventListener(new Component.TouchEventListener() {
            @Override
            public boolean onTouchEvent(Component component, TouchEvent touchEvent) {
                int i = touchEvent.getAction();
                if(i ==  TouchEvent.PRIMARY_POINT_DOWN){
                    ShapeElement shapeElement = new ShapeElement();
                    shapeElement.setShape(1);
                    shapeElement.setRgbColor(new RgbColor(187, 255, 255));

equalsign.setBackground(shapeElement);
                }
                if(i == TouchEvent.PRIMARY_POINT_UP){
                    ShapeElement shapeElement = new ShapeElement();
                    shapeElement.setRgbColor(new RgbColor(247, 249, 250));

equalsign.setBackground(shapeElement);
                }
                return true;
            }
        });
        /************************************fourth-row*********************************/
    }

@Override
    public void onStart(Intent intent) {
        super.onStart(intent);
        super.setUIContent(ResourceTable.Layout_ability_main);
        initMASComponents();
        CalCulatorGo.displaytext = displaytext;
    }

@Override
    protected void onInactive() {
        super.onInactive();
    }

@Override
    public void onActive() {
        super.onActive();
    }

@Override
    protected void onBackground() {
        super.onBackground();
    }

@Override
    public void onForeground(Intent intent) {
        super.onForeground(intent);
    }

@Override
    protected void onStop() {
        super.onStop();
    }
}
```

## &nbsp;&nbsp;&nbsp;4.1.4 MainAbility.java

```java
package com.tdtxdcxm.mycalculator;

import com.tdtxdcxm.mycalculator.slice.MainAbilitySlice;
import ohos.aafwk.ability.Ability;
import ohos.aafwk.content.Intent;

public class MainAbility extends Ability {
    @Override
    public void onStart(Intent intent) {
        super.onStart(intent);
        super.setMainRoute(MainAbilitySlice.class.getName());
    }
}
```

## &nbsp;&nbsp;&nbsp;4.1.5 MyApplication.java

```java
package com.tdtxdcxm.mycalculator;

import ohos.aafwk.ability.AbilityPackage;

public class MyApplication extends AbilityPackage {
    @Override
    public void onInitialize() {
        super.onInitialize();
    }
}
```

# &nbsp;&nbsp;4.2 XML源代码
## &nbsp;&nbsp;&nbsp;4.2.1 background_ability_main.xml

```xml
<?xml version="1.0" encoding="UTF-8" ?>
<shape xmlns:ohos="http://schemas.huawei.com/res/ohos"
       ohos:shape="rectangle">
    <solid
        ohos:color="#FFFFFF"/>
</shape>
```

## &nbsp;&nbsp;&nbsp;4.2.2 ability_main.xml

```xml
<?xml version="1.0" encoding="utf-8"?>
<DirectionalLayout
    xmlns:ohos="http://schemas.huawei.com/res/ohos"
    ohos:height="match_parent"
    ohos:width="match_parent"
    ohos:alignment="center"
    ohos:orientation="vertical">
    <Text
        ohos:id="$+id:displaytext"
        ohos:height="0"
        ohos:weight="3.5"
        ohos:width="match_parent"

ohos:auto_font_size="true"
        ohos:hint="计算..."
        ohos:text_alignment="center"
        ohos:text_color="#FFC354C3"
        ohos:multiple_lines="true">
    </Text>
    <DirectionalLayout
        ohos:id="$+id:operationarea"
        ohos:height="0"
        ohos:weight="6.5"
        ohos:width="match_parent"

ohos:alignment="center"
        ohos:orientation="vertical"

ohos:background_element="#FFFFFFFF">
        <DirectionalLayout
            ohos:id="$+id:firstrow"
            ohos:height="0"
            ohos:weight="1"
            ohos:width="match_parent"

ohos:alignment="center"
            ohos:orientation="horizontal"

ohos:background_element="#FFD6FDE3">
            <Text
                ohos:id="$+id:clear"
                ohos:height="match_parent"
                ohos:width="0"
                ohos:weight="1"

ohos:text="C"
                ohos:text_size="50vp"
                ohos:text_alignment="center">
            </Text>
            <Text
                ohos:id="$+id:percentage"
                ohos:height="match_parent"
                ohos:width="0"
                ohos:weight="1"

ohos:text="%"
                ohos:text_size="50vp"
                ohos:text_alignment="center">
            </Text>
            <Text
                ohos:id="$+id:backspace"
                ohos:height="match_parent"
                ohos:width="0"
                ohos:weight="1"

ohos:text="B"
                ohos:text_size="50vp"
                ohos:text_alignment="center">
            </Text>
            <Text
                ohos:id="$+id:division"
                ohos:height="match_parent"
                ohos:width="0"
                ohos:weight="1"

ohos:text="÷"
                ohos:text_size="50vp"
                ohos:text_alignment="center">
            </Text>
        </DirectionalLayout>
        <DirectionalLayout
            ohos:id="$+id:secondrow"
            ohos:height="0"
            ohos:weight="1"
            ohos:width="match_parent"

ohos:alignment="center"
            ohos:orientation="horizontal"

ohos:background_element="#FFCFF1F3">
            <Text
                ohos:id="$+id:one"
                ohos:height="match_parent"
                ohos:width="0"
                ohos:weight="1"

ohos:text="1"
                ohos:text_size="50vp"
                ohos:text_alignment="center">
            </Text>
            <Text
                ohos:id="$+id:two"
                ohos:height="match_parent"
                ohos:width="0"
                ohos:weight="1"

ohos:text="2"
                ohos:text_size="50vp"
                ohos:text_alignment="center">
            </Text>
            <Text
                ohos:id="$+id:three"
                ohos:height="match_parent"
                ohos:width="0"
                ohos:weight="1"

ohos:text="3"
                ohos:text_size="50vp"
                ohos:text_alignment="center">
            </Text>
            <Text
                ohos:id="$+id:multiplication"
                ohos:height="match_parent"
                ohos:width="0"
                ohos:weight="1"

ohos:text="×"
                ohos:text_size="50vp"
                ohos:text_alignment="center">
            </Text>
        </DirectionalLayout>
        <DirectionalLayout
            ohos:id="$+id:thirdrow"
            ohos:height="0"
            ohos:weight="1"
            ohos:width="match_parent"

ohos:alignment="center"
            ohos:orientation="horizontal"

ohos:background_element="#FFEDFDFF">
            <Text
                ohos:id="$+id:four"
                ohos:height="match_parent"
                ohos:width="0"
                ohos:weight="1"

ohos:text="4"
                ohos:text_size="50vp"
                ohos:text_alignment="center">
            </Text>
            <Text
                ohos:id="$+id:five"
                ohos:height="match_parent"
                ohos:width="0"
                ohos:weight="1"

ohos:text="5"
                ohos:text_size="50vp"
                ohos:text_alignment="center">
            </Text>
            <Text
                ohos:id="$+id:six"
                ohos:height="match_parent"
                ohos:width="0"
                ohos:weight="1"

ohos:text="6"
                ohos:text_size="50vp"
                ohos:text_alignment="center">
            </Text>
            <Text
                ohos:id="$+id:subtraction"
                ohos:height="match_parent"
                ohos:width="0"
                ohos:weight="1"

ohos:text="-"
                ohos:text_size="50vp"
                ohos:text_alignment="center">
            </Text>
        </DirectionalLayout>
        <DirectionalLayout
            ohos:id="$+id:fourthrow"
            ohos:height="0"
            ohos:weight="1"
            ohos:width="match_parent"

ohos:alignment="center"
            ohos:orientation="horizontal"

ohos:background_element="#FFEDF8FA">
            <Text
                ohos:id="$+id:seven"
                ohos:height="match_parent"
                ohos:width="0"
                ohos:weight="1"

ohos:text="7"
                ohos:text_size="50vp"
                ohos:text_alignment="center">
            </Text>
            <Text
                ohos:id="$+id:eight"
                ohos:height="match_parent"
                ohos:width="0"
                ohos:weight="1"

ohos:text="8"
                ohos:text_size="50vp"
                ohos:text_alignment="center">
            </Text>
            <Text
                ohos:id="$+id:nine"
                ohos:height="match_parent"
                ohos:width="0"
                ohos:weight="1"

ohos:text="9"
                ohos:text_size="50vp"
                ohos:text_alignment="center">
            </Text>
            <Text
                ohos:id="$+id:addition"
                ohos:height="match_parent"
                ohos:width="0"
                ohos:weight="1"

ohos:text="+"
                ohos:text_size="50vp"
                ohos:text_alignment="center">
            </Text>
        </DirectionalLayout>
        <DirectionalLayout
            ohos:id="$+id:fifthrow"
            ohos:height="0"
            ohos:weight="1"
            ohos:width="match_parent"

ohos:alignment="center"
            ohos:orientation="horizontal"

ohos:background_element="#FFF7F9FA">
            <Text
                ohos:id="$+id:zero"
                ohos:height="match_parent"
                ohos:width="0"
                ohos:weight="1"

ohos:text="0"
                ohos:text_size="50vp"
                ohos:text_alignment="center">
            </Text>
            <Text
                ohos:id="$+id:doublezero"
                ohos:height="match_parent"
                ohos:width="0"
                ohos:weight="1"

ohos:text="00"
                ohos:text_size="50vp"
                ohos:text_alignment="center">
            </Text>
            <Text
                ohos:id="$+id:point"
                ohos:height="match_parent"
                ohos:width="0"
                ohos:weight="1"

ohos:text="."
                ohos:text_size="50vp"
                ohos:text_alignment="center">
            </Text>
            <Text
                ohos:id="$+id:equalsign"
                ohos:height="match_parent"
                ohos:width="0"
                ohos:weight="1"

ohos:text="="
                ohos:text_size="50vp"
                ohos:text_alignment="center">
            </Text>
        </DirectionalLayout>
    </DirectionalLayout>
</DirectionalLayout>
```

# 5. app截图

![在这里插入图片描述](https://img-blog.csdnimg.cn/d04cb232cac84aef8be0cff898f10e39.png?x-oss-process=image/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAVERUWA==,size_20,color_FFFFFF,t_70,g_se,x_16#pic_center)

![在这里插入图片描述](https://img-blog.csdnimg.cn/4283d507b3e34b04b79f5dbb4eab117d.png?x-oss-process=image/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBAVERUWA==,size_20,color_FFFFFF,t_70,g_se,x_16#pic_center)

# 6.app运行视频(远程真机调试运行)

[app运行视频](https://live.csdn.net/v/187229)

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