【鸿蒙】HarMonyOS的UI组件学习二之拨号界面-技术-极客网

打开DevEco studio，选择java语言新建项目

打开Layout布局文件夹，编辑布局文件

该练习使用DirectionalLayout布局嵌套使用，完成手机拨号界面，该界面包含Text和Button组件组成，其效果图如下:

【鸿蒙】HarMonyOS的UI组件学习二之拨号界面

在graphic文件夹中创建Button使用的圆形背景样式background_button_phone.xml，其代码如下:

<?xml version=“1.0“ encoding=“utf-8“?><shape xmlns:ohos=“http://schemas.huawei.com/res/ohos“ ohos:shape=“oval“> <solid ohos:color=“#ffC6C4C2“/></shape>

布局代码如下:

<?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=“horizontal_center“ ohos:orientation=“vertical“>  <Text ohos:id=“$+id:tv_phone“ ohos:height=“match_content“ ohos:width=“match_parent“ ohos:weight=“1“ ohos:left_margin=“30fp“ ohos:right_margin=“30fp“ ohos:auto_font_size=“true“ ohos:text_alignment=“center“ ohos:text_size=“70px“ ohos:max_text_lines=“1“ ohos:hint=“输入手机号,例如:181********“/>  <DirectionalLayout ohos:height=“match_content“ ohos:width=“match_parent“ ohos:weight=“3“ ohos:margin=“10vp“ ohos:alignment=“horizontal_center“ ohos:orientation=“vertical“>  <DirectionalLayout ohos:height=“match_content“ ohos:orientation=“horizontal“ ohos:width=“match_parent“> <DirectionalLayout ohos:height=“match_content“ ohos:width=“match_content“ ohos:alignment=“center“ ohos:weight=“1“> <Button ohos:id=“$+id:b1“ ohos:height=“240px“ ohos:width=“240px“ ohos:background_element=“$graphic:background_button_phone“ ohos:text_size=“30vp“ ohos:text=“1“/> </DirectionalLayout> <DirectionalLayout ohos:height=“match_content“ ohos:width=“match_content“ ohos:alignment=“center“ ohos:weight=“1“> <Button ohos:id=“$+id:b2“ ohos:height=“240px“ ohos:width=“240px“ ohos:text_size=“30vp“ ohos:background_element=“$graphic:background_button_phone“ ohos:text=“2“/> </DirectionalLayout> <DirectionalLayout ohos:height=“match_content“ ohos:width=“match_content“ ohos:alignment=“center“ ohos:weight=“1“> <Button ohos:id=“$+id:b3“ ohos:height=“240px“ ohos:width=“240px“ ohos:text_size=“30vp“ ohos:background_element=“$graphic:background_button_phone“ ohos:text=“3“/> </DirectionalLayout> </DirectionalLayout>  <DirectionalLayout ohos:height=“match_content“ ohos:orientation=“horizontal“ ohos:top_margin=“10vp“ ohos:width=“match_parent“> <DirectionalLayout ohos:height=“match_content“ ohos:width=“match_content“ ohos:alignment=“center“ ohos:weight=“1“> <Button ohos:id=“$+id:b4“ ohos:height=“240px“ ohos:width=“240px“ ohos:background_element=“$graphic:background_button_phone“ ohos:text_size=“30vp“ ohos:text=“4“/> </DirectionalLayout> <DirectionalLayout ohos:height=“match_content“ ohos:width=“match_content“ ohos:alignment=“center“ ohos:weight=“1“> <Button ohos:id=“$+id:b5“ ohos:height=“240px“ ohos:width=“240px“ ohos:text_size=“30vp“ ohos:background_element=“$graphic:background_button_phone“ ohos:text=“5“/> </DirectionalLayout> <DirectionalLayout ohos:height=“match_content“ ohos:width=“match_content“ ohos:alignment=“center“ ohos:weight=“1“> <Button ohos:id=“$+id:b6“ ohos:height=“240px“ ohos:width=“240px“ ohos:text_size=“30vp“ ohos:background_element=“$graphic:background_button_phone“ ohos:text=“6“/> </DirectionalLayout> </DirectionalLayout>  <DirectionalLayout ohos:height=“match_content“ ohos:orientation=“horizontal“ ohos:top_margin=“10vp“ ohos:width=“match_parent“> <DirectionalLayout ohos:height=“match_content“ ohos:width=“match_content“ ohos:alignment=“center“ ohos:weight=“1“> <Button ohos:id=“$+id:b7“ ohos:height=“240px“ ohos:width=“240px“ ohos:background_element=“$graphic:background_button_phone“ ohos:text_size=“30vp“ ohos:text=“7“/> </DirectionalLayout> <DirectionalLayout ohos:height=“match_content“ ohos:width=“match_content“ ohos:alignment=“center“ ohos:weight=“1“> <Button ohos:id=“$+id:b8“ ohos:height=“240px“ ohos:width=“240px“ ohos:text_size=“30vp“ ohos:background_element=“$graphic:background_button_phone“ ohos:text=“8“/> </DirectionalLayout> <DirectionalLayout ohos:height=“match_content“ ohos:width=“match_content“ ohos:alignment=“center“ ohos:weight=“1“> <Button ohos:id=“$+id:b9“ ohos:height=“240px“ ohos:width=“240px“ ohos:text_size=“30vp“ ohos:background_element=“$graphic:background_button_phone“ ohos:text=“9“/> </DirectionalLayout> </DirectionalLayout>  <DirectionalLayout ohos:height=“match_content“ ohos:orientation=“horizontal“ ohos:top_margin=“10vp“ ohos:width=“match_parent“> <DirectionalLayout ohos:height=“match_content“ ohos:width=“match_content“ ohos:alignment=“center“ ohos:weight=“1“> <Button ohos:id=“$+id:b10“ ohos:height=“240px“ ohos:width=“240px“ ohos:background_element=“$graphic:background_button_phone“ ohos:text_size=“30vp“ ohos:text=“*“/> </DirectionalLayout> <DirectionalLayout ohos:height=“match_content“ ohos:width=“match_content“ ohos:alignment=“center“ ohos:weight=“1“> <Button ohos:id=“$+id:b11“ ohos:height=“240px“ ohos:width=“240px“ ohos:text_size=“30vp“ ohos:background_element=“$graphic:background_button_phone“ ohos:text=“0“/> </DirectionalLayout> <DirectionalLayout ohos:height=“match_content“ ohos:width=“match_content“ ohos:alignment=“center“ ohos:weight=“1“> <Button ohos:id=“$+id:b12“ ohos:height=“240px“ ohos:width=“240px“ ohos:text_size=“30vp“ ohos:background_element=“$graphic:background_button_phone“ ohos:text=“#“/> </DirectionalLayout> </DirectionalLayout> </DirectionalLayout>  <Button ohos:height=“match_content“ ohos:width=“match_parent“ ohos:left_margin=“30fp“ ohos:right_margin=“30fp“ ohos:bottom_margin=“30fp“ ohos:padding=“10fp“ ohos:text_size=“30vp“ ohos:text_color=“#ffffff“ ohos:text_weight=“1000“ ohos:text_alignment=“center“ ohos:background_element=“$graphic:background_button8“ ohos:text=“Call“/></DirectionalLayout>

在对应的AbilitySilce类的界面中，使用setUIContent方法加载布局文件，并通过组件的id获得所有组件的对象。给所有数字键添加触摸事件，并监听其按下和弹起状态，完成拨号键盘的功能并随机完成背景颜色按下时的颜色改变。

其java代码如下:

package com.example.hm_phone_java.slice;import com.example.hm_phone_java.ResourceTable;import ohos.aafwk.ability.AbilitySlice;import ohos.aafwk.content.Intent;import ohos.agp.colors.RgbColor;import ohos.agp.components.Button;import ohos.agp.components.Component;import ohos.agp.components.Text;import ohos.agp.components.element.ShapeElement;import ohos.multimodalinput.event.KeyEvent;import ohos.multimodalinput.event.TouchEvent;import java.util.Random;public class ButtonAbilitySlice extends AbilitySlice { private Button[] buttons=new Button[12]; private int[] ids={ResourceTable.Id_b1,ResourceTable.Id_b2, ResourceTable.Id_b3,ResourceTable.Id_b4, ResourceTable.Id_b5,ResourceTable.Id_b6, ResourceTable.Id_b7,ResourceTable.Id_b8, ResourceTable.Id_b9,ResourceTable.Id_b10, ResourceTable.Id_b11,ResourceTable.Id_b12}; @Override protected void onStart(Intent intent) { super.onStart(intent); super.setUIContent(ResourceTable.Layout_ability_callphone); Text text= (Text) this.findComponentById(ResourceTable.Id_tv_phone); //设置自动更改字体大小的范围 text.setAutoFontSizeRule(70,100,5); initButton(text); } //初始化所有键盘数字按钮 public void initButton(Text text){ for (int i = 0; i < buttons.length; i++) { buttons[i]= (Button) this.findComponentById(ids[i]); //给所有按键设置点击事件 /* buttons[i].setClickedListener(new Component.ClickedListener() { @Override public void onClick(Component component) { //Button btn= (Button) component; //text.setText(text.getText()+btn.getText()); } });*/ //给所有数字按键添加触摸事件 buttons[i].setTouchEventListener(new Component.TouchEventListener() { @Override public boolean onTouchEvent(Component component, TouchEvent touchEvent) { ShapeElement se=new ShapeElement(); se.setShape(ShapeElement.OVAL); Button btn= (Button) component; //将监听按下和弹起两种事件 switch (touchEvent.getAction()){ case TouchEvent.PRIMARY_POINT_DOWN: //当有按键被按下，获得该数字键上的数字追加在text文本上，并随机改变背景颜色 text.setText(text.getText()+btn.getText()); se.setRgbColor(new RgbColor(new Random().nextInt(255), new Random().nextInt(255), new Random().nextInt(255))); break; case TouchEvent.PRIMARY_POINT_UP: //当弹起时，恢复数字键默认颜色 se.setRgbColor(new RgbColor(198,196,194)); break; } btn.setBackground(se); return true; } }); } }}

运行效果如下:

（因不能上传录制的效果视频，先截图给大家看一下效果，抱歉不能展示更好的效果体验，请亲自尝试，看到效果）

【鸿蒙】HarMonyOS的UI组件学习二之拨号界面

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