HarmonyOSAPP組件分享(二)

作者：鴻蒙時代 2021-03-18 09:36:02

系統(tǒng) OpenHarmony

文章由鴻蒙社區(qū)產出，想要了解更多內容請前往：51CTO和華為官方戰(zhàn)略合作共建的鴻蒙技術社區(qū)https://harmonyos.51cto.com

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想了解更多內容，請訪問：

51CTO和華為官方合作共建的鴻蒙技術社區(qū)

https://harmonyos.51cto.com

Button組件介紹和應用體驗分享

Button組件是常用的交互類組件之一，本節(jié)將來聊聊Button組件的使用以及按照按鈕的形狀，按鈕可以分為：普通按鈕，橢圓按鈕，膠囊按鈕，圓形按鈕等的各種的樣式圖

顯示效果：

代碼如下：

布局中的代碼：

<?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:orientation="vertical"> 
 
    <Button 
        ohos:id="$+id:jltfbtn" 
        ohos:height="match_content" 
        ohos:width="match_content" 
        ohos:background_element="#FF17D3EB" 
        ohos:layout_alignment="horizontal_center" 
        ohos:text="我是一個按鈕button" 
        ohos:padding="20vp" 
        ohos:top_margin="10px" 
        ohos:text_color="#FFFFFF" 
        ohos:text_size="50" 
        /> 
    <Text 
        ohos:height="100px" 
        ohos:width="300px" 
        ohos:text_size="20fp" 
        ohos:top_margin="40px" 
        ohos:left_margin="400px" 
        ohos:text="普通按鈕"/> 
    <Button 
        ohos:width="200vp" 
        ohos:height="70vp" 
        ohos:text_size="27fp" 
        ohos:text="button" 
        ohos:background_element="$graphic:jltfcolor_blue_element" 
        ohos:top_margin="15px" 
        ohos:left_margin="90vp" 
        ohos:bottom_margin="15vp" 
        ohos:right_padding="8vp" 
        ohos:left_padding="8vp" 
        /> 
    <Text 
        ohos:height="100px" 
        ohos:width="300px" 
        ohos:text_size="20fp" 
        ohos:left_margin="400px" 
        ohos:text="橢圓按鈕"/> 
    <Button 
        ohos:width="200vp" 
        ohos:height="70vp" 
        ohos:text_size="27fp" 
        ohos:text="button" 
        ohos:background_element="$graphic:jltfoval_button_element" 
        ohos:bottom_margin="15vp" 
        ohos:top_margin="15px" 
        ohos:left_margin="90vp" 
        ohos:right_padding="8vp" 
        ohos:left_padding="8vp" 
        /> 
    <Text 
        ohos:height="100px" 
        ohos:width="300px" 
        ohos:text_size="20fp" 
        ohos:left_margin="400px" 
        ohos:text="膠囊按鈕"/> 
    <Button 
        ohos:id="$+id:button" 
        ohos:width="200vp" 
        ohos:height="70vp" 
        ohos:text_size="27fp" 
        ohos:text="button" 
        ohos:background_element="$graphic:jltfcapsule_button_element" 
        ohos:left_margin="90vp" 
        ohos:top_margin="15px" 
        ohos:bottom_margin="15vp" 
        ohos:right_padding="15vp" 
        ohos:left_padding="15vp" 
        /> 
    <Text 
        ohos:height="100px" 
        ohos:width="300px" 
        ohos:text_size="20fp" 
        ohos:left_margin="400px" 
        ohos:text="圓形按鈕"/> 
    <Button 
        ohos:id="$+id:button2" 
        ohos:width="140vp" 
        ohos:height="140vp" 
        ohos:text_size="27fp" 
        ohos:background_element="$graphic:jltfcircle_button_element" 
        ohos:text="+" 
        ohos:left_margin="110vp" 
        ohos:bottom_margin="15vp" 
        ohos:right_padding="15vp" 
        ohos:left_padding="15vp" 
        /> 
</DirectionalLayout>

Slice中的代碼：

package com.example.jltftiyan.slice; 
 
import com.example.jltftiyan.ResourceTable; 
import ohos.aafwk.ability.AbilitySlice; 
import ohos.aafwk.content.Intent; 
import ohos.agp.components.Button; 
 
public class MainAbilitySlice extends AbilitySlice { 
    @Override 
    public void onStart(Intent intent) { 
        super.onStart(intent); 
        super.setUIContent(ResourceTable.Layout_ability_main); 
 
        Button button = (Button) findComponentById(ResourceTable.Id_jltfbtn); 
        button.setClickedListener(l -> { 
            //更改Button組件的內容 
            button.setText("我被點擊了~"); 
        }); 
    } 
 
    @Override 
    public void onActive() { 
        super.onActive(); 
    } 
 
    @Override 
    public void onForeground(Intent intent) { 
        super.onForeground(intent); 
    } 
}

graphic目錄下xml文件的代碼示例如下：

jltfcolor_blue_element.xml 
 
<?xml version="1.0" encoding="utf-8"?> 
<shape xmlns:ohos="http://schemas.huawei.com/res/ohos" 
       ohos:shape="rectangle"> 
    <solid 
        ohos:color="#007CFD"/> 
</shape> 
 
jltfoval_button_element.xml 
 
<?xml version="1.0" encoding="utf-8"?> 
<shape xmlns:ohos="http://schemas.huawei.com/res/ohos" 
       ohos:shape="oval"> 
    <solid 
        ohos:color="#007CFD"/> 
</shape> 
 
jltfcapsule_button_element.xml 
 
<?xml version="1.0" encoding="utf-8"?> 
<shape xmlns:ohos="http://schemas.huawei.com/res/ohos" 
       ohos:shape="rectangle"> 
    <corners 
        ohos:radius="100"/> 
    <solid 
        ohos:color="#007CFD"/> 
</shape> 
 
jltfcircle_button_element.xml 
 
<?xml version="1.0" encoding="utf-8"?> 
<shape xmlns:ohos="http://schemas.huawei.com/res/ohos" 
       ohos:shape="oval"> 
    <solid 
        ohos:color="#007CFD"/> 
</shape>

StackLayout布局練習與分享

StackLayout直接在屏幕上開辟出一塊空白的區(qū)域，添加到這個布局中的視圖都是以層疊的方式顯示，而它會把這些視圖默認放到這塊區(qū)域的左上角，第一個添加到布局中視圖顯示在最底層，最后一個被放在最頂層。上一層的視圖會覆蓋下一層的視圖。

自己可以通過修改寬高設置大小來控制位置的變換，后面會有更多新的內容呈現(xiàn)出來，這里就簡單的敲了個案例。