class="hljs-ln-code"> class="hljs-ln-line">import FormExtensionAbility from '@ohos.app.form.FormExtensionAbility';
class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="2"> class="hljs-ln-code"> class="hljs-ln-line">import formBindingData from'@ohos.app.form.formBindingData'; class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="3"> class="hljs-ln-code"> class="hljs-ln-line"> class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="4"> class="hljs-ln-code"> class="hljs-ln-line">export default class MyFormExtensionAbility extends FormExtensionAbility { class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="5"> class="hljs-ln-code"> class="hljs-ln-line"> onAddForm(want) { class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="6"> class="hljs-ln-code"> class="hljs-ln-line"> console.log('FormExtensionAbility onAddForm, want:' + want.abilityName); class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="7"> class="hljs-ln-code"> class="hljs-ln-line"> let dataObj1 = { class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="8"> class="hljs-ln-code"> class="hljs-ln-line"> temperature:'11c', class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="9"> class="hljs-ln-code"> class="hljs-ln-line"> 'time':'11:00' class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="10"> class="hljs-ln-code"> class="hljs-ln-line"> }; class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="11"> class="hljs-ln-code"> class="hljs-ln-line"> let obj1 = formBindingData.createFormBindingData(dataObj1); class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="12"> class="hljs-ln-code"> class="hljs-ln-line"> return obj1; class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="13"> class="hljs-ln-code"> class="hljs-ln-line"> } class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="14"> class="hljs-ln-code"> class="hljs-ln-line">} class="hljs-button signin active" data-title="登录复制" data-report-click="{"spm":"1001.2101.3001.4334"}" onclick="hljs.signin(event)">

🦋2.3 onCastToNormalForm
onCastToNormalForm()是卡片提供方接收临时卡片转常态卡片的通知接口,onCastToNormalForm()方法用于将扩展表单转换为普通表单的回调方法。当用户选择将扩展表单转换为普通表单时,系统会调用此方法。
在该方法中,开发者可以执行以下操作:
- 停止扩展表单的任何后台任务或计时器。
- 释放扩展表单的资源。
- 将扩展表单转换为普通表单。
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="1"> class="hljs-ln-code"> class="hljs-ln-line">export default class MyFormExtensionAbility extends FormExtensionAbility {
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="2"> class="hljs-ln-code"> class="hljs-ln-line"> onCastToNormalForm(formId) {
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="3"> class="hljs-ln-code"> class="hljs-ln-line"> console.log('FormExtensionAbility onCastToNormalForm, formId:' + formId);
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="4"> class="hljs-ln-code"> class="hljs-ln-line"> }
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="5"> class="hljs-ln-code"> class="hljs-ln-line">}
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🦋2.4 onUpdateForm
onUpdateForm()是卡片提供方接收更新卡片的通知接口。获取最新数据后调用formProvider的updateForm接口刷新卡片数据,
onUpdateForm方法具有以下特点:
- onUpdateForm方法是在表单数据发生改变时触发的回调方法。
- onUpdateForm方法有两个参数:参数一为表单的全局唯一标识符formId,参数二为表单的数据。
- onUpdateForm可以通过formId来判断是哪个表单发生了改变,从而进行相应的处理。
- onUpdateForm方法中可以对表单数据进行处理,例如更新UI界面或者进行其他相关操作。
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="1"> class="hljs-ln-code"> class="hljs-ln-line">import FormExtensionAbility from '@ohos.app.form.FormExtensionAbility';
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="2"> class="hljs-ln-code"> class="hljs-ln-line">import formBindingData from '@ohos.app.form.formBindingData';
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="3"> class="hljs-ln-code"> class="hljs-ln-line">import formProvider from '@ohos.app.form.formProvider';
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="4"> class="hljs-ln-code"> class="hljs-ln-line">
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="5"> class="hljs-ln-code"> class="hljs-ln-line">export default class MyFormExtensionAbility extends FormExtensionAbility {
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="6"> class="hljs-ln-code"> class="hljs-ln-line"> onUpdateForm(formId) {
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="7"> class="hljs-ln-code"> class="hljs-ln-line"> console.log('FormExtensionAbility onUpdateForm, formId: ${formId}');
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="8"> class="hljs-ln-code"> class="hljs-ln-line"> let obj2 = formBindingData.createFormBindingData({
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="9"> class="hljs-ln-code"> class="hljs-ln-line"> temperature: '22c',
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="10"> class="hljs-ln-code"> class="hljs-ln-line"> time: '22:00'
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="11"> class="hljs-ln-code"> class="hljs-ln-line"> });
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="12"> class="hljs-ln-code"> class="hljs-ln-line"> formProvider.updateForm(formId, obj2).then((data) => {
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="13"> class="hljs-ln-code"> class="hljs-ln-line"> console.log('FormExtensionAbility context updateForm, data: ${data}');
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="14"> class="hljs-ln-code"> class="hljs-ln-line"> }).catch((error) => {
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="15"> class="hljs-ln-code"> class="hljs-ln-line"> console.error('Operation updateForm failed. Cause: ${error}');
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="16"> class="hljs-ln-code"> class="hljs-ln-line"> });
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="17"> class="hljs-ln-code"> class="hljs-ln-line"> }
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="18"> class="hljs-ln-code"> class="hljs-ln-line">};
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🦋2.5 onChangeFormVisibility
onChangeFormVisibility()是卡片提供方接收修改可见性的通知接口,onChangeFormVisibility方法是在扩展页面的可见性发生变化时被调用的回调方法。当扩展页面从不可见状态变为可见状态,或者从可见状态变为不可见状态时,该方法会被自动调用。
该方法的原型是:
public void onChangeFormVisibility(boolean isVisible)
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在方法中,可以根据isVisible参数的值来执行相应的操作。当isVisible为true时,表示扩展页面变为可见状态,可以进行相关的UI更新和数据加载等操作。当isVisible为false时,表示扩展页面变为不可见状态,可以进行相关的资源释放和停止后台任务等操作。
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="1"> class="hljs-ln-code"> class="hljs-ln-line">import FormExtensionAbility from '@ohos.app.form.FormExtensionAbility';
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="2"> class="hljs-ln-code"> class="hljs-ln-line">import formBindingData from '@ohos.app.form.formBindingData';
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="3"> class="hljs-ln-code"> class="hljs-ln-line">import formProvider from '@ohos.app.form.formProvider';
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="4"> class="hljs-ln-code"> class="hljs-ln-line">
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="5"> class="hljs-ln-code"> class="hljs-ln-line">export default class MyFormExtensionAbility extends FormExtensionAbility {
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="6"> class="hljs-ln-code"> class="hljs-ln-line"> onChangeFormVisibility(newStatus) {
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="7"> class="hljs-ln-code"> class="hljs-ln-line"> console.log('FormExtensionAbility onChangeFormVisibility, newStatus: ${newStatus}');
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="8"> class="hljs-ln-code"> class="hljs-ln-line"> let obj2 = formBindingData.createFormBindingData({
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="9"> class="hljs-ln-code"> class="hljs-ln-line"> temperature: '22c',
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="10"> class="hljs-ln-code"> class="hljs-ln-line"> time: '22:00'
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="11"> class="hljs-ln-code"> class="hljs-ln-line"> });
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="12"> class="hljs-ln-code"> class="hljs-ln-line">
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="13"> class="hljs-ln-code"> class="hljs-ln-line"> for (let key in newStatus) {
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="14"> class="hljs-ln-code"> class="hljs-ln-line"> console.log('FormExtensionAbility onChangeFormVisibility, key: ${key}, value= ${newStatus[key]}');
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="15"> class="hljs-ln-code"> class="hljs-ln-line"> formProvider.updateForm(key, obj2).then((data) => {
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="16"> class="hljs-ln-code"> class="hljs-ln-line"> console.log('FormExtensionAbility context updateForm, data: ${data}');
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="17"> class="hljs-ln-code"> class="hljs-ln-line"> }).catch((error) => {
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="18"> class="hljs-ln-code"> class="hljs-ln-line"> console.error('Operation updateForm failed. Cause: ${error}');
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="19"> class="hljs-ln-code"> class="hljs-ln-line"> });
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="20"> class="hljs-ln-code"> class="hljs-ln-line"> }
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="21"> class="hljs-ln-code"> class="hljs-ln-line"> }
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="22"> class="hljs-ln-code"> class="hljs-ln-line">};
class="hide-preCode-box">
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🦋2.6 onFormEvent
onFormEvent()是卡片提供方接收处理卡片事件的通知接口,onFormEvent()方法是用来处理表单事件的回调方法。
表单事件包括表单创建、表单更新和表单销毁三种类型。当有这些事件发生时,系统会调用FormExtensionAbility的onFormEvent()方法,并将相应的事件类型和表单事件对象作为参数传递给该方法。
可以重写onFormEvent()方法,根据事件类型来处理相应的业务逻辑。比如,在表单创建事件中,可以通过表单事件对象获取表单实例,并进行初始化操作;在表单更新事件中,可以根据表单事件对象获取更新后的表单数据,并进行界面刷新等操作;在表单销毁事件中,可以进行资源释放等清理工作。
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="1"> class="hljs-ln-code"> class="hljs-ln-line">export default class MyFormExtension extends FormExtensionAbility {
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="2"> class="hljs-ln-code"> class="hljs-ln-line"> onFormEvent(formId, message) {
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="3"> class="hljs-ln-code"> class="hljs-ln-line"> console.log('FormExtensionAbility onFormEvent, formId:' + formId + ', message:' + message);
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="4"> class="hljs-ln-code"> class="hljs-ln-line"> }
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="5"> class="hljs-ln-code"> class="hljs-ln-line">}
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🦋2.7 onRemoveForm
onRemoveForm()是卡片提供方接收销毁卡片的通知接口,onRemoveForm方法用于在扩展中移除表单时进行处理。当主应用或者其他应用移除了扩展中的一个表单时,该方法会被调用。
具体来说,onRemoveForm方法的作用是在表单被移除时执行一些清理工作,例如释放资源、取消注册监听器等等。开发者可以重写此方法,根据实际需求来进行处理。
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="1"> class="hljs-ln-code"> class="hljs-ln-line">export default class MyFormExtensionAbility extends FormExtensionAbility {
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="2"> class="hljs-ln-code"> class="hljs-ln-line"> onRemoveForm(formId) {
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="3"> class="hljs-ln-code"> class="hljs-ln-line"> console.log('FormExtensionAbility onRemoveForm, formId:' + formId);
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="4"> class="hljs-ln-code"> class="hljs-ln-line"> }
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="5"> class="hljs-ln-code"> class="hljs-ln-line">}
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🦋2.8 onConfigurationUpdate
onConfigurationUpdate()是当系统配置更新时调用,onConfigurationUpdate方法用于处理配置更新的逻辑。当系统配置(例如屏幕方向、语言等)发生变化时,系统会调用该方法。
onConfigurationUpdate方法有一个参数,即新的Configuration对象。开发者可以通过该对象获取最新的配置信息,并根据需要进行相应的处理,例如重新加载界面、更新数据等。
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="1"> class="hljs-ln-code"> class="hljs-ln-line">class MyFormExtensionAbility extends FormExtensionAbility {
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="2"> class="hljs-ln-code"> class="hljs-ln-line"> onConfigurationUpdate(config) {
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="3"> class="hljs-ln-code"> class="hljs-ln-line"> console.log('onConfigurationUpdate, config:' + JSON.stringify(config));
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="4"> class="hljs-ln-code"> class="hljs-ln-line"> }
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="5"> class="hljs-ln-code"> class="hljs-ln-line">}
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🦋2.9 onAcquireFormState
onAcquireFormState()是卡片提供方接收查询卡片状态通知接口,默认返回卡片初始状态,FormExtensionAbility的onAcquireFormState()方法用于获取表单的状态。
具体来说,当扩展表单Ability首次启动时,onAcquireFormState()会被调用。开发者可以在此方法中获取表单的初始状态,并返回给系统。
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="1"> class="hljs-ln-code"> class="hljs-ln-line">import formInfo from '@ohos.app.form.formInfo';
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="2"> class="hljs-ln-code"> class="hljs-ln-line">class MyFormExtensionAbility extends FormExtensionAbility {
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="3"> class="hljs-ln-code"> class="hljs-ln-line"> onAcquireFormState(want) {
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="4"> class="hljs-ln-code"> class="hljs-ln-line"> console.log('FormExtensionAbility onAcquireFormState, want:' + want);
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="5"> class="hljs-ln-code"> class="hljs-ln-line"> return formInfo.FormState.UNKNOWN;
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="6"> class="hljs-ln-code"> class="hljs-ln-line"> }
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="7"> class="hljs-ln-code"> class="hljs-ln-line">}
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3.WorkSchedulerExtensionAbility
WorkSchedulerExtensionAbility主要是延迟任务调度回调
🦋3.1 导入模块
import WorkSchedulerExtensionAbility from '@ohos.WorkSchedulerExtensionAbility'
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🦋3.2 onWorkStart
onWorkStart()是延迟任务调度开始回调,onWorkStart方法是当一个定时任务开始时被调用的。当定时任务启动时,系统会调用该方法来执行相关的逻辑操作。
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="1"> class="hljs-ln-code"> class="hljs-ln-line">export default class MyWorkSchedulerExtensionAbility extends WorkSchedulerExtensionAbility {
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="2"> class="hljs-ln-code"> class="hljs-ln-line"> onWorkStart(workInfo) {
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="3"> class="hljs-ln-code"> class="hljs-ln-line"> console.log('MyWorkSchedulerExtensionAbility onWorkStart' + JSON.stringify(workInfo));
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="4"> class="hljs-ln-code"> class="hljs-ln-line"> }
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="5"> class="hljs-ln-code"> class="hljs-ln-line">}
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🦋3.3 onWorkStop
onWorkStart()是延迟任务调度开始回调,onWorkStop方法是在工作调度停止时被调用的。在该方法中,开发者可以处理一些在工作停止时需要执行的逻辑。
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="1"> class="hljs-ln-code"> class="hljs-ln-line">export default class MyWorkSchedulerExtensionAbility extends WorkSchedulerExtensionAbility {
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="2"> class="hljs-ln-code"> class="hljs-ln-line"> onWorkStop(workInfo) {
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="3"> class="hljs-ln-code"> class="hljs-ln-line"> console.log('MyWorkSchedulerExtensionAbility onWorkStop' + JSON.stringify(workInfo));
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="4"> class="hljs-ln-code"> class="hljs-ln-line"> }
- class="hljs-ln-numbers"> class="hljs-ln-line hljs-ln-n" data-line-number="5"> class="hljs-ln-code"> class="hljs-ln-line">}
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🚀写在最后
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- 点赞,转发,有你们的 『点赞和评论』,才是我创造的动力。
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