在卡片页面中可以通过postCardAction接口触发message事件拉起FormExtensionAbility,然后由FormExtensionAbility刷新卡片内容,下面是这种刷新方式的简单示例。
在卡片页面通过注册Button的onClick点击事件回调,并在回调中调用
postCardAction
接口触发message事件拉起FormExtensionAbility。
let storage = new LocalStorage();
@Entry(storage)
@Component
struct WidgetCard {
@LocalStorageProp('title') title: string = 'init';
@LocalStorageProp('detail') detail: string = 'init';
build() {
Column() {
Button('刷新')
.onClick(() => {
postCardAction(this, {
'action': 'message',
'params': {
'msgTest': 'messageEvent'
}
});
})
Text(`${this.title}`)
Text(`${this.detail}`)
}
.width('100%')
.height('100%')
}
}
在FormExtensionAbility的onFormEvent生命周期中调用updateForm接口刷新卡片。
import formBindingData from '@ohos.app.form.formBindingData';
import FormExtensionAbility from '@ohos.app.form.FormExtensionAbility';
import formProvider from '@ohos.app.form.formProvider';
export default class EntryFormAbility extends FormExtensionAbility {
onFormEvent(formId, message) {
// Called when a specified message event defined by the form provider is triggered.
console.info(`FormAbility onEvent, formId = ${formId}, message: ${JSON.stringify(message)}`);
let formData = {
'title': 'Title Update Success.', // 和卡片布局中对应
'detail': 'Detail Update Success.', // 和卡片布局中对应
};
let formInfo = formBindingData.createFormBindingData(formData)
formProvider.updateForm(formId, formInfo).then((data) => {
console.info('FormAbility updateForm success.' + JSON.stringify(data));
}).catch((error) => {
console.error('FormAbility updateForm failed: ' + JSON.stringify(error));
})
}
...
}
运行效果如下图所示。
在卡片页面中可以通过postCardAction接口触发router或call事件拉起UIAbility,然后由UIAbility刷新卡片内容,下面是这种刷新方式的简单示例。
在卡片页面通过注册Button的onClick点击事件回调,并在回调中调用
postCardAction
接口触发router事件拉起UIAbility。
let storage = new LocalStorage();
@Entry(storage)
@Component
struct WidgetCard {
@LocalStorageProp('detail') detail: string = 'init';
build() {
Column() {
Button('跳转')
.margin('20%')
.onClick(() => {
console.info('postCardAction to EntryAbility');
postCardAction(this, {
'action': 'router',
'abilityName': 'EntryAbility', // 只能跳转到当前应用下的UIAbility
'params': {
'detail': 'RouterFromCard'
}
});
})
Text(`${this.detail}`).margin('20%')
}
.width('100%')
.height('100%')
}
}
在UIAbility的onCreate()或者onNewWant()生命周期中可以通过入参want获取卡片的formID和传递过来的参数信息,然后调用updateForm接口刷新卡片。
import UIAbility from '@ohos.app.ability.UIAbility';
import formBindingData from '@ohos.app.form.formBindingData';
import formProvider from '@ohos.app.form.formProvider';
import formInfo from '@ohos.app.form.formInfo';
export default class EntryAbility extends UIAbility {
// 如果UIAbility第一次启动,在收到Router事件后会触发onCreate生命周期回调
onCreate(want, launchParam) {
console.info('Want:' + JSON.stringify(want));
if (want.parameters[formInfo.FormParam.IDENTITY_KEY] !== undefined) {
let curFormId = want.parameters[formInfo.FormParam.IDENTITY_KEY];
let message = JSON.parse(want.parameters.params).detail;
console.info(`UpdateForm formId: ${curFormId}, message: ${message}`);
let formData = {
"detail": message + ': onCreate UIAbility.', // 和卡片布局中对应
};
let formMsg = formBindingData.createFormBindingData(formData)
formProvider.updateForm(curFormId, formMsg).then((data) => {
console.info('updateForm success.' + JSON.stringify(data));
}).catch((error) => {
console.error('updateForm failed:' + JSON.stringify(error));
})
}
}
// 如果UIAbility已在后台运行,在收到Router事件后会触发onNewWant生命周期回调
onNewWant(want, launchParam) {
console.info('onNewWant Want:' + JSON.stringify(want));
if (want.parameters[formInfo.FormParam.IDENTITY_KEY] !== undefined) {
let curFormId = want.parameters[formInfo.FormParam.IDENTITY_KEY];
let message = JSON.parse(want.parameters.params).detail;
console.info(`UpdateForm formId: ${curFormId}, message: ${message}`);
let formData = {
"detail": message + ': onNewWant UIAbility.', // 和卡片布局中对应
};
let formMsg = formBindingData.createFormBindingData(formData)
formProvider.updateForm(curFormId, formMsg).then((data) => {
console.info('updateForm success.' + JSON.stringify(data));
}).catch((error) => {
console.error('updateForm failed:' + JSON.stringify(error));
})
}
}
...
}
在使用
postCardAction
接口的call事件时,需要在FormExtensionAbility中的onAddForm生命周期回调中更新formId。
import formBindingData from '@ohos.app.form.formBindingData';
import FormExtensionAbility from '@ohos.app.form.FormExtensionAbility';
export default class EntryFormAbility extends FormExtensionAbility {
onAddForm(want) {
let formId = want.parameters["ohos.extra.param.key.form_identity"];
let dataObj1 = {
"formId": formId
};
let obj1 = formBindingData.createFormBindingData(dataObj1);
return obj1;
}
...
};
在卡片页面通过注册Button的onClick点击事件回调,并在回调中调用
postCardAction
接口触发call事件拉起UIAbility。
let storage = new LocalStorage();
@Entry(storage)
@Component
struct WidgetCard {
@LocalStorageProp('detail') detail: string = 'init';
@LocalStorageProp('formId') formId: string = '0';
build() {
Column() {
Button('拉至后台')
.margin('20%')
.onClick(() => {
console.info('postCardAction to EntryAbility');
postCardAction(this, {
'action': 'call',
'abilityName': 'EntryAbility', // 只能跳转到当前应用下的UIAbility
'params': {
'method': 'funA',
'formId': this.formId,
'detail': 'CallFromCard'
}
});
})
Text(`${this.detail}`).margin('20%')
}
.width('100%')
.height('100%')
}
}
在UIAbility的onCreate生命周期中监听call事件所需的方法,然后调用updateForm接口刷新卡片。
import UIAbility from '@ohos.app.ability.UIAbility';
import formBindingData from '@ohos.app.form.formBindingData';
import formProvider from '@ohos.app.form.formProvider';
import formInfo from '@ohos.app.form.formInfo';
const MSG_SEND_METHOD: string = 'funA'
// 在收到call事件后会触发callee监听的方法
function FunACall(data) {
// 获取call事件中传递的所有参数
let params = JSON.parse(data.readString())
if (params.formId !== undefined) {
let curFormId = params.formId;
let message = params.detail;
console.info(`UpdateForm formId: ${curFormId}, message: ${message}`);
let formData = {
"detail": message
};
let formMsg = formBindingData.createFormBindingData(formData)
formProvider.updateForm(curFormId, formMsg).then((data) => {
console.info('updateForm success.' + JSON.stringify(data));
}).catch((error) => {
console.error('updateForm failed:' + JSON.stringify(error));
})
}
return null;
}
export default class EntryAbility extends UIAbility {
// 如果UIAbility第一次启动,call事件后会触发onCreate生命周期回调
onCreate(want, launchParam) {
console.info('Want:' + JSON.stringify(want));
try {
// 监听call事件所需的方法
this.callee.on(MSG_SEND_METHOD, FunACall);
} catch (error) {
console.log(`${MSG_SEND_METHOD} register failed with error ${JSON.stringify(error)}`)
}
}
...
}