HarmonyOS应用开发基础——双击事件_setdoubleclickedlistener

HarmonyOS应用开发基础

双击事件

首先在ability_main.xml中添加一个Button和Text。`

 <Button
        ohos:id="$+id:but1"
        ohos:height="match_content"
        ohos:width="match_content"
        ohos:text="点我"
        ohos:text_size="200"
        ohos:background_element="red"
        />    
        <Text
        ohos:height="match_content"
        ohos:width="match_content"
        ohos:id="$+id:text1"
        ohos:text="text"
        ohos:text_size="100"
        />
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实现步骤

1.通过id找到组件

        Button but1=(Button)findComponentById(ResourceTable.Id_but1);
        text1=(Text)findComponentById(ResourceTable.Id_text1);
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2.给按钮组件添加双击事件

but1.setDoubleClickedListener(this);
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3.本类实现DoubleClickedListener接口重写

public class MainAbilitySlice extends AbilitySlice implements  Component.DoubleClickedListener{...}
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4.重写onDoubleClick方法体

    @Override
    public void onDoubleClick(Component component) {
    //  component 表示点击组件的对象
        text1.setText("被双击了");
    }
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