AbilitySlice 是什么 （HarmonyOS鸿蒙开发基础知识）
AbilitySlice 是什么
AbilitySlice主要用于承载Ability的具体逻辑实现和界面UI，是应用显示、运行和跳转的最小单元。AbilitySlice通过setUIContent()为界面设置布局
本文重点给大家介绍鸿蒙开发之Button按钮类型及如何通过代码设置(HarmonyOS鸿蒙开发基础知识)，具体内容如下所示：
Button类型分类
按照按钮的形状，按钮可以分为：
Button类型效果和代码
普通按钮
普通按钮和其他按钮的区别在于不需要设置任何形状，只设置文本和背景颜色即可，例如：
<Button ohos:width="150vp" ohos:height="50vp" ohos:text_size="27fp" ohos:text="button" ohos:background_element="$graphic:color_blue_element" ohos:left_margin="15vp" ohos:bottom_margin="15vp" ohos:right_padding="8vp" ohos:left_padding="8vp" />
椭圆按钮
椭圆按钮是通过设置background_element的来实现的，background_element的shape设置为椭圆（oval），例如：
<Button ohos:width="150vp" ohos:height="50vp" ohos:text_size="27fp" ohos:text="button" ohos:background_element="$graphic:oval_button_element" ohos:left_margin="15vp" ohos:bottom_margin="15vp" ohos:right_padding="8vp" ohos:left_padding="8vp" ohos:element_left="$graphic:ic_btn_reload" />
胶囊按钮
胶囊按钮是一种常见的按钮，设置按钮背景时将背景设置为矩形形状，并且设置ShapeElement的radius的半径，例如：
<Button ohos:id="$+id:button" ohos:width="match_content" ohos:height="match_content" ohos:text_size="27fp" ohos:text="button" ohos:background_element="$graphic:capsule_button_element" ohos:left_margin="15vp" ohos:bottom_margin="15vp" ohos:right_padding="15vp" ohos:left_padding="15vp" />
圆形按钮
圆形按钮和椭圆按钮的区别在于组件本身的宽度和高度需要相同，例如：
<Button ohos:id="$+id:button4" ohos:width="50vp" ohos:height="50vp" ohos:text_size="27fp" ohos:background_element="$graphic:circle_button_element" ohos:text="+" ohos:left_margin="15vp" ohos:bottom_margin="15vp" ohos:right_padding="15vp" ohos:left_padding="15vp" />
场景示例
利用圆形按钮，胶囊按钮，文本组件可以绘制出如下拨号盘的UI界面。
<?xml version="1.0" encoding="utf-8"?> <DirectionalLayout xmlns:ohos="http://schemas.huawei.com/res/ohos" ohos:width="match_parent" ohos:height="match_parent" ohos:background_element="$graphic:color_light_gray_element" ohos:orientation="vertical"> <Text ohos:width="match_content" ohos:height="match_content" ohos:text_size="20fp" ohos:text="0123456789" ohos:background_element="$graphic:green_text_element" ohos:text_alignment="center" ohos:layout_alignment="horizontal_center" /> <DirectionalLayout ohos:width="match_parent" ohos:height="match_content" ohos:alignment="horizontal_center" ohos:orientation="horizontal" ohos:top_margin="5vp" ohos:bottom_margin="5vp"> <Button ohos:width="40vp" ohos:height="40vp" ohos:text_size="15fp" ohos:background_element="$graphic:green_circle_button_element" ohos:text="1" ohos:text_alignment="center" /> <Button ohos:width="40vp" ohos:height="40vp" ohos:text_size="15fp" ohos:background_element="$graphic:green_circle_button_element" ohos:text="2" ohos:left_margin="5vp" ohos:right_margin="5vp" ohos:text_alignment="center" /> <Button ohos:width="40vp" ohos:height="40vp" ohos:text_size="15fp" ohos:background_element="$graphic:green_circle_button_element" ohos:text="3" ohos:text_alignment="center" /> </DirectionalLayout> <DirectionalLayout ohos:width="match_parent" ohos:height="match_content" ohos:alignment="horizontal_center" ohos:orientation="horizontal" ohos:bottom_margin="5vp"> <Button ohos:width="40vp" ohos:height="40vp" ohos:text_size="15fp" ohos:background_element="$graphic:green_circle_button_element" ohos:text="4" ohos:text_alignment="center" /> <Button ohos:width="40vp" ohos:height="40vp" ohos:text_size="15fp" ohos:left_margin="5vp" ohos:right_margin="5vp" ohos:background_element="$graphic:green_circle_button_element" ohos:text="5" ohos:text_alignment="center" /> <Button ohos:width="40vp" ohos:height="40vp" ohos:text_size="15fp" ohos:background_element="$graphic:green_circle_button_element" ohos:text="6" ohos:text_alignment="center" /> </DirectionalLayout> <DirectionalLayout ohos:width="match_parent" ohos:height="match_content" ohos:alignment="horizontal_center" ohos:orientation="horizontal" ohos:bottom_margin="5vp"> <Button ohos:width="40vp" ohos:height="40vp" ohos:text_size="15fp" ohos:background_element="$graphic:green_circle_button_element" ohos:text="7" ohos:text_alignment="center" /> <Button ohos:width="40vp" ohos:height="40vp" ohos:text_size="15fp" ohos:left_margin="5vp" ohos:right_margin="5vp" ohos:background_element="$graphic:green_circle_button_element" ohos:text="8" ohos:text_alignment="center" /> <Button ohos:width="40vp" ohos:height="40vp" ohos:text_size="15fp" ohos:background_element="$graphic:green_circle_button_element" ohos:text="9" ohos:text_alignment="center" /> </DirectionalLayout> <DirectionalLayout ohos:width="match_parent" ohos:height="match_content" ohos:alignment="horizontal_center" ohos:orientation="horizontal" ohos:bottom_margin="5vp"> <Button ohos:width="40vp" ohos:height="40vp" ohos:text_size="15fp" ohos:background_element="$graphic:green_circle_button_element" ohos:text="*" ohos:text_alignment="center" /> <Button ohos:width="40vp" ohos:height="40vp" ohos:text_size="15fp" ohos:left_margin="5vp" ohos:right_margin="5vp" ohos:background_element="$graphic:green_circle_button_element" ohos:text="0" ohos:text_alignment="center" /> <Button ohos:width="40vp" ohos:height="40vp" ohos:text_size="15fp" ohos:background_element="$graphic:green_circle_button_element" ohos:text="#" ohos:text_alignment="center" /> </DirectionalLayout> <Button ohos:width="match_content" ohos:height="match_content" ohos:text_size="15fp" ohos:text="CALL" ohos:background_element="$graphic:green_capsule_button_element" ohos:bottom_margin="5vp" ohos:text_alignment="center" ohos:layout_alignment="horizontal_center" ohos:left_padding="10vp" ohos:right_padding="10vp" ohos:top_padding="2vp" ohos:bottom_padding="2vp" /> </DirectionalLayout>
总结
