鸿蒙计算器

background_ability_main<?xml version=“1.0” encoding=“utf-8”?>

xmlns:ohos=“http://schemas.huawei.com/res/ohos”

ohos:width=“match_parent”

ohos:height=“match_parent”

ohos:top_margin=“19vp”

ohos:orientation=“vertical”>

ohos:height=“30vp”

ohos:width=“140vp”

ohos:background_element=“$graphic:table_text_bg_element.xml”

ohos:top_margin=“18vp”

ohos:left_margin=“45vp”

ohos:text=“0”

ohos:id=“$+id:txt1”

ohos:text_alignment=“right”

ohos:text_size=“20fp”/>

xmlns:ohos=“http://schemas.huawei.com/res/ohos”

ohos:height=“match_content”

ohos:width=“match_content”

ohos:background_element=“#87CEEB”

ohos:layout_alignment=“vertical_center”

ohos:row_count=“5”

ohos:column_count=“4”

ohos:left_margin=“45vp”

ohos:padding=“2vp”>

ohos:height=“30vp”

ohos:width=“30vp”

ohos:background_element=“$graphic:table_text_bg_element.xml”

ohos:margin=“2vp”

ohos:text=“1”

ohos:text_alignment=“center”

ohos:id=“$+id:button1”

ohos:text_size=“20fp”/>

ohos:height=“30vp”

ohos:width=“30vp”

ohos:background_element=“$graphic:table_text_bg_element.xml”

ohos:margin=“2vp”

ohos:text=“2”

ohos:id=“$+id:button2”

ohos:text_alignment=“center”

ohos:text_size=“20fp”/>

ohos:height=“30vp”

ohos:width=“30vp”

ohos:background_element=“$graphic:table_text_bg_element.xml”

ohos:margin=“2vp”

ohos:text=“3”

ohos:id=“$+id:button3”

ohos:text_alignment=“center”

ohos:text_size=“20fp”/>

ohos:height=“30vp”

ohos:width=“30vp”

ohos:background_element=“$graphic:table_text_bg_element.xml”

ohos:margin=“2vp”

ohos:text=“+”

ohos:id=“$+id:buttonAdd”

ohos:text_alignment=“center”

ohos:text_size=“20fp”/>

ohos:height=“30vp”

ohos:width=“30vp”

ohos:background_element=“$graphic:table_text_bg_element.xml”

ohos:margin=“2vp”

ohos:text=“4”

ohos:id=“$+id:button4”

ohos:text_alignment=“center”

ohos:text_size=“20fp”/>

ohos:height=“30vp”

ohos:width=“30vp”

ohos:background_element=“$graphic:table_text_bg_element.xml”

ohos:margin=“2vp”

ohos:text=“5”

ohos:id=“$+id:button5”

ohos:text_alignment=“center”

ohos:text_size=“20fp”/>

ohos:height=“30vp”

ohos:width=“30vp”

ohos:background_element=“$graphic:table_text_bg_element.xml”

ohos:margin=“2vp”

ohos:text=“6”

ohos:id=“$+id:button6”

ohos:text_alignment=“center”

ohos:text_size=“20fp”/>

ohos:height=“30vp”

ohos:width=“30vp”

ohos:background_element=“$graphic:table_text_bg_element.xml”

ohos:margin=“2vp”

ohos:text=“-”

ohos:id=“$+id:buttonSub”

ohos:text_alignment=“center”

ohos:text_size=“20fp”/>

ohos:height=“30vp”

ohos:width=“30vp”

ohos:background_element=“$graphic:table_text_bg_element.xml”

ohos:margin=“2vp”

ohos:text=“7”

ohos:id=“$+id:button7”

ohos:text_alignment=“center”

ohos:text_size=“20fp”/>

ohos:height=“30vp”

ohos:width=“30vp”

ohos:background_element=“$graphic:table_text_bg_element.xml”

ohos:margin=“2vp”

ohos:text=“8”

ohos:id=“$+id:button8”

ohos:text_alignment=“center”

ohos:text_size=“20fp”/>

ohos:height=“30vp”

ohos:width=“30vp”

ohos:background_element=“$graphic:table_text_bg_element.xml”

ohos:margin=“2vp”

ohos:text=“9”

ohos:id=“$+id:button9”

ohos:text_alignment=“center”

ohos:text_size=“20fp”/>

ohos:height=“30vp”

ohos:width=“30vp”

ohos:background_element=“$graphic:table_text_bg_element.xml”

ohos:margin=“2vp”

ohos:text=“*”

ohos:id=“$+id:buttonMul”

ohos:text_alignment=“center”

ohos:text_size=“20fp”/>

ohos:height=“30vp”

ohos:width=“30vp”

ohos:background_element=“$graphic:table_text_bg_element.xml”

ohos:margin=“2vp”

ohos:text=“0”

ohos:id=“$+id:button0”

ohos:text_alignment=“center”

ohos:text_size=“20fp”/>

ohos:height=“30vp”

ohos:width=“30vp”

ohos:background_element=“$graphic:table_text_bg_element.xml”

ohos:margin=“2vp”

ohos:text=“.”

ohos:id=“$+id:buttonPoint”

ohos:text_alignment=“center”

ohos:text_size=“20fp”/>

ohos:height=“30vp”

ohos:width=“30vp”

ohos:background_element=“$graphic:table_text_bg_element.xml”

ohos:margin=“2vp”

ohos:text=“=”

ohos:id=“$+id:buttonEq”

ohos:text_alignment=“center”

ohos:text_size=“20fp”/>

ohos:height=“30vp”

ohos:width=“30vp”

ohos:background_element=“$graphic:table_text_bg_element.xml”

ohos:margin=“2vp”

ohos:text=“/”

ohos:id=“$+id:buttonDiv”

ohos:text_alignment=“center”

ohos:text_size=“20fp”/>

ohos:height=“30vp”

ohos:width=“30vp”

ohos:background_element=“$graphic:table_text_bg_element.xml”

ohos:margin=“2vp”

ohos:text=“”

ohos:text_alignment=“center”

ohos:text_size=“20fp”/>

ohos:height=“30vp”

ohos:width=“30vp”

ohos:background_element=“$graphic:table_text_bg_element.xml”

ohos:margin=“2vp”

ohos:text=“AC”

ohos:id=“$+id:buttonAC”

ohos:text_alignment=“center”

ohos:text_size=“20fp”/>

ohos:height=“30vp”

ohos:width=“30vp”

ohos:background_element=“$graphic:bg_info.xml”

ohos:margin=“2vp”

ohos:text=“”

ohos:id=“$+id:buttonOP”

ohos:text_alignment=“center”

ohos:text_size=“20fp”/>

ohos:height=“30vp”

ohos:width=“30vp”

ohos:background_element=“$graphic:table_text_bg_element.xml”

ohos:margin=“2vp”

ohos:text=“”

ohos:text_alignment=“center”

ohos:text_size=“20fp”/>

bg_info.xml<?xml version=“1.0” encoding=“utf-8”?>

ohos:shape=“rectangle”>

ohos:radius=“5vp”/>

ohos:width=“1vp”

ohos:color=“gray”/>

ohos:color=“gray”/>

table_text_bg_element.xml<?xml version=“1.0” encoding=“utf-8”?>

ohos:shape=“rectangle”>

ohos:radius=“5vp”/>

ohos:width=“1vp”

ohos:color=“gray”/>

ohos:color=“#00BFFF”/>

接下来写java代码。这个比布局容易多啦

MainAbilitySlice.javapackage com.example.myapplication1.slice;

import com.example.myapplication1.ResourceTable;

import ohos.aafwk.ability.AbilitySlice;

import ohos.aafwk.content.Intent;

import ohos.agp.components.Button;

import ohos.agp.components.Component;

import ohos.agp.components.Text;

import java.math.BigDecimal;

import java.math.BigInteger;

public class MainAbilitySlice extends AbilitySlice {

Text txt1;

String num;

Boolean isNew = false;

@Override

public void onStart(Intent intent) {

super.onStart(intent);

super.setUIContent(ResourceTable.Layout_ability_main);

txt1 = (Text) findComponentById(ResourceTable.Id_txt1);

Button button1 = (Button) findComponentById(ResourceTable.Id_button1);

Button button2 = (Button) findComponentById(ResourceTable.Id_button2);

Button button3 = (Button) findComponentById(ResourceTable.Id_button3);

Button button4 = (Button) findComponentById(ResourceTable.Id_button4);

Button button5 = (Button) findComponentById(ResourceTable.Id_button5);

Button button6 = (Button) findComponentById(ResourceTable.Id_button6);

Button button7 = (Button) findComponentById(ResourceTable.Id_button7);

Button button8 = (Button) findComponentById(ResourceTable.Id_button8);

Button button9 = (Button) findComponentById(ResourceTable.Id_button9);

Button button0 = (Button) findComponentById(ResourceTable.Id_button0);

Button btnPoint = (Button) findComponentById(ResourceTable.Id_buttonPoint);

button1.setClickedListener(new ClickedListenerNumber());

button2.setClickedListener(new ClickedListenerNumber());

button3.setClickedListener(new ClickedListenerNumber());

button4.setClickedListener(new ClickedListenerNumber());

button5.setClickedListener(new ClickedListenerNumber());

button6.setClickedListener(new ClickedListenerNumber());

button7.setClickedListener(new ClickedListenerNumber());

button8.setClickedListener(new ClickedListenerNumber());

button9.setClickedListener(new ClickedListenerNumber());

button0.setClickedListener(new ClickedListenerNumber());

btnPoint.setClickedListener(new ClickedListenerPoint());

Button btnAdd = (Button)findComponentById(ResourceTable.Id_buttonAdd);

Button btnSub = (Button)findComponentById(ResourceTable.Id_buttonSub);

Button btnMul = (Button)findComponentById(ResourceTable.Id_buttonMul);

Button btnDiv = (Button)findComponentById(ResourceTable.Id_buttonDiv);

btnAdd.setClickedListener(new ClickedListenerOP());

btnSub.setClickedListener(new ClickedListenerOP());

btnMul.setClickedListener(new ClickedListenerOP());

btnDiv.setClickedListener(new ClickedListenerOP());

Button btnAC = (Button)findComponentById(ResourceTable.Id_buttonAC);

btnAC.setClickedListener(new Component.ClickedListener() {

@Override

public void onClick(Component component) {

num = “”;

isNew = false;

txt1.setText(“0”);

Button btnOP = (Button)findComponentById(ResourceTable.Id_buttonOP);

btnOP.setText(“”);

}

});

Button btnEQ = (Button)findComponentById(ResourceTable.Id_buttonEq);

btnEQ.setClickedListener(new Component.ClickedListener() {

@Override

public void onClick(Component component) {

BigDecimal d1 = new BigDecimal(num);

BigDecimal d2 = new BigDecimal(txt1.getText());

BigDecimal res;

Button btnOP = (Button)findComponentById(ResourceTable.Id_buttonOP);

switch (btnOP.getText()) {

case “+”: res = d1.add(d2);break;

case “-”: res = d1.subtract(d2);break;

case “*”: res = d1.multiply(d2);break;

case “/”: {

try { res = d1.divide(d2); } catch (Exception e) {res = BigDecimal.valueOf(0); }

break;

}

default: res = BigDecimal.valueOf(0);

};

txt1.setText(res.stripTrailingZeros().toPlainString());

}

});

}

class ClickedListenerNumber implements Component.ClickedListener {

@Override

public void onClick(Component component) {

Button btn = (Button)component;

if (txt1.getText().equals(“0”) || isNew == true) {

txt1.setText( btn.getText() );

} else {

txt1.setText( txt1.getText() + btn.getText() );

}

isNew = false;

}

}

class ClickedListenerPoint implements Component.ClickedListener {

@Override

public void onClick(Component component) {

if( txt1.getText().indexOf(‘.’) == -1 )

txt1.setText( txt1.getText() + ‘.’ );

}

}

class ClickedListenerOP implements Component.ClickedListener {

@Override

public void onClick(Component component) {

Button btn = (Button)component;

Button btnOP = (Button)findComponentById(ResourceTable.Id_buttonOP);

btnOP.setText(btn.getText());

num = txt1.getText();

isNew = true;

}

}

@Override

public void onActive() {

super.onActive();

}

@Override

public void onForeground(Intent intent) {

super.onForeground(intent);

}

}