2024年Android最新鸿蒙HarmonyOS APP开发入门3——组件（九 按钮组件 ）—，2024年最新面试阿里巴巴
重要知识点
下面是有几位Android行业大佬对应上方技术点整理的一些进阶资料。
高级进阶篇——高级UI，自定义View（部分展示）
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ohos:right_padding=“8vp”
ohos:left_padding=“8vp”/>
graphic目录下的color\_blue\_element.xml文件示例如下：
#### 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=“
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graphic:oval\_button\_element" ohos:left\_margin="15vp" ohos:bottom\_margin="15vp" ohos:right\_padding="8vp" ohos:left\_padding="8vp" ohos:element\_left="
graphic:oval_button_element"ohos:left_margin="15vp"ohos:bottom_margin="15vp"ohos:right_padding="8vp"ohos:left_padding="8vp"ohos:element_left="media:ic_btn_reload”/>
graphic目录下的oval\_button\_element.xml文件示例如下:
#### 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=“
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+id:button" ohos:width="match\_content" ohos:height="match\_content" ohos:text\_size="27fp" ohos:text="button" ohos:background\_element="
+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”/>
graphic目录下的capsule\_button\_element.xml文件示例如下:
#### 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=“
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+id:button" ohos:width="50vp" ohos:height="50vp" ohos:text\_size="27fp" ohos:background\_element="
+id:button"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”/>
graphic目录下的circle\_button\_element.xml文件示例如下:
#### 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。
\*\*图4 界面效果
##### 源码示例：
<DirectionalLayout
xmlns:ohos=“http://schemas.huawei.com/res/ohos”
ohos:width=“match_parent”
ohos:height=“match_parent”
ohos:background_element=“
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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:color_light_gray_element"ohos:orientation="vertical"><Textohos: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=“
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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="1"ohos:text_alignment="center"/><Buttonohos: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=“
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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="3"ohos:text_alignment="center"/></DirectionalLayout><DirectionalLayoutohos:width="match_parent"ohos:height="match_content"ohos:alignment="horizontal_center"ohos:orientation="horizontal"ohos:bottom_margin="5vp"><Buttonohos: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=“
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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="5"ohos:text_alignment="center"/><Buttonohos: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
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=“
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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="7"ohos:text_alignment="center"/><Buttonohos: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=“
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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="9"ohos:text_alignment="center"/></DirectionalLayout><DirectionalLayoutohos:width="match_parent"ohos:height="match_content"ohos:alignment="horizontal_center"ohos:orientation="horizontal"ohos:bottom_margin="5vp"><Buttonohos: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=“
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graphic:green_circle_button_element"ohos:text="0"ohos:text_alignment="center"/><Buttonohos:width="40vp"ohos:height="40vp"ohos:text_size="15fp"ohos:background_element="graphic:green_circle_button_element”
ohos:text=“#”
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<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”
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35岁中年危机大多是因为被短期的利益牵着走，过早压榨掉了价值，如果能一开始就树立一个正确的长远的职业规划。35岁后的你只会比周围的人更值钱。
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中…(img-VBuMjfoG-1714980321586)]
35岁中年危机大多是因为被短期的利益牵着走，过早压榨掉了价值，如果能一开始就树立一个正确的长远的职业规划。35岁后的你只会比周围的人更值钱。
网上学习资料一大堆，但如果学到的知识不成体系，遇到问题时只是浅尝辄止，不再深入研究，那么很难做到真正的技术提升。
一个人可以走的很快，但一群人才能走的更远！不论你是正从事IT行业的老鸟或是对IT行业感兴趣的新人，都欢迎加入我们的的圈子（技术交流、学习资源、职场吐槽、大厂内推、面试辅导），让我们一起学习成长！
讨论HarmonyOS开发技术，专注于API与组件、DevEco Studio、测试、元服务和应用上架分发等。
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