鸿蒙操作系统 HarmonyOS NEXT 中级开发环境搭建与政务服务类 APP 开发

public class MainAbilitySlice extends AbilitySlice {    @Override    public void onStart(Intent intent) {        super.onStart(intent);        // 设置布局        setUIContent(ResourceTable.Layout_ability_main);
        // 获取按钮并设置点击事件        Button applyButton = (Button) findComponentById(ResourceTable.Id_apply_button);        applyButton.setClickedListener(new Component.ClickedListener() {            @Override            public void onClick(Component component) {                // 处理办证申请逻辑                applyForCertificate();            }        });    }
    private void applyForCertificate() {        // 模拟办证申请逻辑        ToastDialog toastDialog = new ToastDialog(getContext());        toastDialog.setText("办证申请已提交，请等待审核。");        toastDialog.show();    }}

<?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:orientation="vertical"    ohos:padding="32">
    <Text        ohos:id="$+id/title_text"        ohos:width="match_parent"        ohos:height="wrap_content"        ohos:text="政务服务办证申请"        ohos:text_size="32fp"        ohos:text_alignment="center"        ohos:margin_bottom="32vp"/>
    <Button        ohos:id="$+id/apply_button"        ohos:width="match_parent"        ohos:height="wrap_content"        ohos:text="申请办证"        ohos:text_size="24fp"        ohos:margin_top="32vp"/></DirectionalLayout>