[原创]鸿蒙不出，谁与争锋，是时候发布我的第一个鸿蒙APP了-HarmonyOS-看雪-安全社区|安全招聘|kanxue.com

[原创]鸿蒙不出，谁与争锋，是时候发布我的第一个鸿蒙APP了

2021-6-5 10:49 23039

[原创]鸿蒙不出，谁与争锋，是时候发布我的第一个鸿蒙APP了

中国小孩大人

2021-6-5 10:49

23039

鸿蒙发布了，我来尝尝先，写个hello，world过过瘾。尝试在手表上写一个计算器，结果大致如下，这布局有点不好弄啊，将就着吧。
图片描述
上面是先按下数字 56，再按下 * ，再按下 2，再按下 = 的结果。

布局代码如下：background_ability_main

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<?xml version="1.0" encoding="utf-8"?>
<DirectionalLayout
    xmlns:ohos="http://schemas.huawei.com/res/ohos"
    ohos:width="match_parent"
    ohos:height="match_parent"
    ohos:top_margin="19vp"
    ohos:orientation="vertical">
    <Text
        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"/>
<TableLayout
    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">
 
    <Button
        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"/>
 
    <Button
        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"/>
 
    <Button
        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"/>
    <Button
        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"/>
    <Button
        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"/>
    <Button
        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"/>
    <Button
        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"/>
    <Button
        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"/>
    <Button
        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"/>
    <Button
        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"/>
    <Button
        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"/>
    <Button
        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"/>
    <Button
        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"/>
    <Button
        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"/>
    <Button
        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"/>
    <Button
        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"/>
 
    <Button
        ohos:height="30vp"
        ohos:width="30vp"
        ohos:background_element="$graphic:table_text_bg_element.xml"
        ohos:margin="2vp"
        ohos:text=""
        ohos:text_alignment="center"
        ohos:text_size="20fp"/>
    <Button
        ohos:height="30vp"
        ohos:width="30vp"
        ohos:background_element="$graphic:table_text_bg_element.xml"
        ohos:margin="2vp"
        ohos:text="AC"
        ohos:id="$+id:buttonAC"
        ohos:text_alignment="center"
        ohos:text_size="20fp"/>
    <Button
        ohos:height="30vp"
        ohos:width="30vp"
        ohos:background_element="$graphic:bg_info.xml"
        ohos:margin="2vp"
        ohos:text=""
        ohos:id="$+id:buttonOP"
        ohos:text_alignment="center"
        ohos:text_size="20fp"/>
    <Button
        ohos:height="30vp"
        ohos:width="30vp"
        ohos:background_element="$graphic:table_text_bg_element.xml"
        ohos:margin="2vp"
        ohos:text=""
        ohos:text_alignment="center"
        ohos:text_size="20fp"/>
</TableLayout>
</DirectionalLayout>

bg_info.xml

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:ohos="http://schemas.huawei.com/res/ohos"
       ohos:shape="rectangle">
    <corners
        ohos:radius="5vp"/>
    <stroke
        ohos:width="1vp"
        ohos:color="gray"/>
    <solid
        ohos:color="gray"/>
</shape>

table_text_bg_element.xml

<?xml version="1.0" encoding="utf-8"?>
<shape xmlns:ohos="http://schemas.huawei.com/res/ohos"
       ohos:shape="rectangle">
    <corners
        ohos:radius="5vp"/>
    <stroke
        ohos:width="1vp"
        ohos:color="gray"/>
    <solid
        ohos:color="#00BFFF"/>
</shape>

接下来写java代码。这个比布局容易多啦

MainAbilitySlice.java

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package 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);
    }
}

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中国小孩大人雪币： 1025 活跃值： (2830) 能力值： ( LV2，RANK：15 ) 在线值：发帖 4 回帖 38 粉丝 1 关注私信	中国小孩大人 2021-6-5 10:51 2 楼 0 看到看雪多了一个鸿蒙板块，过来凑凑热闹，哈哈
supperlitt 雪币： 1366 活跃值： (5584) 能力值： ( LV3，RANK：25 ) 在线值：发帖 19 回帖 389 粉丝 28 关注私信	supperlitt 2021-6-5 11:07 3 楼 0 不错不错。
luskyc 雪币： 248 活跃值： (3779) 能力值： ( LV2，RANK：10 ) 在线值：发帖 25 回帖 955 粉丝 10 关注私信	luskyc 2021-6-5 11:45 4 楼 0 好，鸿蒙板块第一个hello，world
Editor 雪币： 17792 活跃值： (60003) 能力值： (RANK：125 ) 在线值：发帖 1205 回帖 2882 粉丝 1485 关注私信	Editor 2021-6-5 11:55 5 楼 1 hello bro
看雪vip用户雪币： 4481 活跃值： (1784) 能力值： ( LV2，RANK：10 ) 在线值：发帖 0 回帖 20 粉丝 1 关注私信	看雪vip用户 2021-6-5 15:28 6 楼 0 hello，鸿蒙
0x99er 雪币： 3072 活跃值： (20) 能力值： ( LV1，RANK：40 ) 在线值：发帖 -4 回帖 54 粉丝 0 关注私信	0x99er 2021-6-5 16:19 7 楼 2 hello，HarmonyOS 楼主放一个编译的程序上来？看看用啥工具可以反编译
fdark 雪币： 1992 活跃值： (493) 能力值： ( LV2，RANK：10 ) 在线值：发帖 1 回帖 7 粉丝 0 关注私信	fdark 2021-6-5 18:32 8 楼 0 这要捧场一下！
SmallDolphin 雪币： 311 活跃值： (336) 能力值： ( LV2，RANK：10 ) 在线值：发帖 0 回帖 13 粉丝 0 关注私信	SmallDolphin 2021-6-5 20:40 9 楼 0 hh，看雪这个Harmony的版块就加的很及时！
柒雪天尚雪币： 182 活跃值： (576) 能力值： ( LV2，RANK：10 ) 在线值：发帖 12 回帖 332 粉丝 4 关注私信	柒雪天尚 2021-6-6 09:30 10 楼 0 中国华为鸿蒙，牛皮，666，我勒宝贝儿
lhxdiao 雪币： 2063 活跃值： (3823) 能力值： ( LV2，RANK：10 ) 在线值：发帖 16 回帖 173 粉丝 110 关注私信	lhxdiao 2021-6-6 15:16 11 楼 0 不错哦
kxzpy 雪币： 3496 活跃值： (749) 能力值： ( LV2，RANK：10 ) 在线值：发帖 0 回帖 267 粉丝 2 关注私信	kxzpy 2021-6-6 20:39 12 楼 0 这个用啥编译？android studio?
lhxdiao 雪币： 2063 活跃值： (3823) 能力值： ( LV2，RANK：10 ) 在线值：发帖 16 回帖 173 粉丝 110 关注私信	lhxdiao 2021-6-6 20:54 13 楼 0 kxzpy 这个用啥编译？android studio? DevEco Studio
AperOdry 雪币： 775 活跃值： (2292) 能力值： ( LV5，RANK：60 ) 在线值：发帖 7 回帖 244 粉丝 14 关注私信	AperOdry 2021-6-6 23:20 14 楼 0 支持支持
只是来打酱油雪币： 239 活跃值： (650) 能力值： ( LV2，RANK：10 ) 在线值：发帖 4 回帖 326 粉丝 2 关注私信	只是来打酱油 2021-6-7 10:22 15 楼 0 支持鸿蒙
wzmooo 雪币： 10089 活跃值： (1729) 能力值： ( LV2，RANK：10 ) 在线值：发帖 8 回帖 489 粉丝 1 关注私信	wzmooo 2021-6-7 11:16 16 楼 0 计算器界面可以做成原型做大使用面积，异型按键
Aspark-zm 雪币： 182 活跃值： (503) 能力值： ( LV2，RANK：10 ) 在线值：发帖 0 回帖 4 粉丝 1 关注私信	Aspark-zm 2021-6-8 08:41 17 楼 0 支持大佬
suuuuu 雪币： 839 活跃值： (5004) 能力值： ( LV2，RANK：10 ) 在线值：发帖 22 回帖 295 粉丝 7 关注私信	suuuuu 2021-6-8 09:13 18 楼 0 楼主牛逼
系统正在维护雪币： 228 活跃值： (19) 能力值： ( LV2，RANK：10 ) 在线值：发帖 0 回帖 5 粉丝 0 关注私信	系统正在维护 2021-6-8 12:53 19 楼 0 hello，HarmonyOS
韩子雪币： 79 活跃值： (40) 能力值： ( LV2，RANK：10 ) 在线值：发帖 0 回帖 5 粉丝 1 关注私信	韩子 2021-6-11 11:46 20 楼 0 鸿蒙6666
草mao 雪币： 112 活跃值： (595) 能力值： ( LV2，RANK：10 ) 在线值：发帖 0 回帖 2 粉丝 0 关注私信	草mao 2021-6-11 21:45 21 楼 0 6666666
小希希雪币： 1501 活跃值： (3260) 能力值： ( LV2，RANK：10 ) 在线值：发帖 15 回帖 321 粉丝 17 关注私信	小希希 2021-6-11 23:11 22 楼 0 好,代码清晰优美
mb_yleoyosl 雪币：能力值： ( LV1，RANK：0 ) 在线值：发帖 0 回帖 3 粉丝 0 关注私信	mb_yleoyosl 2021-6-14 08:37 23 楼 0 会写代码的就是牛
mr靓仔雪币： 218 活跃值： (240) 能力值： ( LV2，RANK：10 ) 在线值：发帖 0 回帖 6 粉丝 0 关注私信	mr靓仔 2021-6-18 16:47 24 楼 0 66666666666666
进击的狐狸雪币： 88 活跃值： (109) 能力值： ( LV2，RANK：10 ) 在线值：发帖 0 回帖 2 粉丝 0 关注私信	进击的狐狸 2021-6-18 16:59 25 楼 0 请问鸿蒙支持C#吗？.net core能不能在鸿蒙系统上跑？
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