基於自制宮格佈局的MyCalculator[我的計算器][API V6]
阿新 • • 發佈：2022-03-20
目錄
1. 名稱
- 將本次專案app命名為：我的計算器、MyCalculator。
- 專案已經放在Gitee倉庫中：MyCalculator
2. app圖示
3. app實現關鍵技巧
- app劃分為上、下兩部分，其中上部是一個Text元件，下部是一個自制宮格元件。
- 實現n×m宮格佈局（表格式）：首先，將宮格按照行數，設定n個豎直放置的DirectionalLayout，然後在其中的每個設定m個水平放置的DirectionalLayout，即可實現自己想要的表格樣式。
- 實現表示式的數學求解：首先，將獲取到的字串進行預處理執行preDo()函式，使得一個完整的字串提取出運算元和運算子，按照原有順序放置在ArrayList中。其次，根據該list執行其中的乘法和除法操作。之後，根據該list執行其中的減法和加法操作。最後，就會得到該表示式的值。【全部運算採用BigDecimal類中的加減乘除函式】
- 被除數是0問題：將異常逐漸丟擲，直到拋至“=”的單擊事件中，進行異常處理，詳情見程式碼。
4. 原始碼
4.0 專案工程檔案結構
4.1 java原始碼
4.1.1 MyArgumentException.java
package com.tdtxdcxm.mycalculator.slice.myexception; public class MyArgumentException extends Exception{ public MyArgumentException(String s) { super(s); } }
4.1.2 CalCulatorGo.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("計算的表示式為空！");
}
this.express = express;
StructArrayListType.displaytext = displaytext;
}
public void preDo(){
//將表示式字串按照數字和運算子每個單獨提取出來按照原順序放入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("___________________________>");
}
}
4.1.3 MainAbilitySlice.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編譯，執行在API 7的機器裡才有效果
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("表示式錯誤！");
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("這裡了！");
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("算術異常！");
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();
}
}
4.1.4 MainAbility.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());
}
}
4.1.5 MyApplication.java
package com.tdtxdcxm.mycalculator;
import ohos.aafwk.ability.AbilityPackage;
public class MyApplication extends AbilityPackage {
@Override
public void onInitialize() {
super.onInitialize();
}
}
4.2 XML原始碼
4.2.1 background_ability_main.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>
4.2.2 ability_main.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="$+id:displaytext"
ohos:height="0"
ohos:weight="3.5"
ohos:width="match_parent"
ohos:auto_font_size="true"
ohos:hint="計算..."
ohos:text_alignment="center"
ohos:text_color="#FFC354C3"
ohos:multiple_lines="true">
</Text>
<DirectionalLayout
ohos:id="$+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>