HarmonyOS 应用开发之UIAbility组件间交互（设备内）(2)

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正文

2. 调用方使用 startAbilityForResult() 方法启动支付应用的UIAbility，在调用方want参数中的entities和action需要被包含在待匹配UIAbility的skills标签配置的entities和actions中。异步回调中的data用于后续接收支付UIAbility停止自身后返回给调用方的信息。系统匹配到符合entities和actions参数条件的UIAbility后，会弹出选择框展示匹配到的UIAbility实例列表供用户选择使用。

import common from ‘@ohos.app.ability.common’;
import hilog from ‘@ohos.hilog’;
import Want from ‘@ohos.app.ability.Want’;
import { BusinessError } from ‘@ohos.base’;

const TAG: string = ‘[Page_UIAbilityComponentsInteractive]’;
const DOMAIN_NUMBER: number = 0xFF00;

@Entry
@Component
struct Page_UIAbilityComponentsInteractive {
build() {
Button()
.onClick(() => {
let context: common.UIAbilityContext = getContext(this) as common.UIAbilityContext; // UIAbilityContext

let want: Want = {
deviceId: ‘’, // deviceId为空表示本设备
bundleName: ‘com.samples.stagemodelabilitydevelop’,
moduleName: ‘entry’, // moduleName非必选
abilityName: ‘FuncAbilityA’,
parameters: { // 自定义信息
info: ‘来自EntryAbility UIAbilityComponentsInteractive页面’
}
};
context.startAbilityForResult(want).then((data) => {
// …
}).catch((err: BusinessError) => {
hilog.error(DOMAIN_NUMBER, TAG, Failed to start ability for result. Code is ${err.code}, message is ${err.message});
});
})
}
}

3. 在支付UIAbility完成支付之后，需要调用 terminateSelfWithResult() 方法实现停止自身，并将abilityResult参数信息返回给调用方。

import common from ‘@ohos.app.ability.common’;
import hilog from ‘@ohos.hilog’;

const TAG: string = ‘[Page_FuncAbilityA]’;
const DOMAIN_NUMBER: number = 0xFF00;

@Entry
@Component
struct Page_FuncAbilityA {
build() {
Button()
.onClick(() => {
let context: common.UIAbilityContext = getContext(this) as common.UIAbilityContext; // UIAbilityContext
const RESULT_CODE: number = 1001;
let abilityResult: common.AbilityResult = {
resultCode: RESULT_CODE,
want: {
bundleName: ‘com.samples.stagemodelabilitydevelop’,
moduleName: ‘entry’, // moduleName非必选
abilityName: ‘FuncAbilityB’,
parameters: {
info: ‘来自FuncAbility Index页面’
},
},
};
context.terminateSelfWithResult(abilityResult, (err) => {
if (err.code) {
hilog.error(DOMAIN_NUMBER, TAG, Failed to terminate self with result. Code is ${err.code}, message is ${err.message});
return;
}
});
})
}
}

4. 在调用方 startAbilityForResult() 方法回调中接收支付应用返回的信息，RESULT_CODE需要与前面 terminateSelfWithResult() 返回的数值保持一致。

import common from ‘@ohos.app.ability.common’;
import hilog from ‘@ohos.hilog’;
import Want from ‘@ohos.app.ability.Want’;
import { BusinessError } from ‘@ohos.base’;
import promptAction from ‘@ohos.promptAction’;

const TAG: string = ‘[EntryAbility]’;
const DOMAIN_NUMBER: number = 0xFF00;

@Entry
@Component
struct Page_UIAbilityComponentsInteractive {
build() {
Button()
.onClick(() => {
let context: common.UIAbilityContext = getContext(this) as common.UIAbilityContext; // UIAbilityContext
const RESULT_CODE: number = 1001;

let want: Want = {
deviceId: ‘’, // deviceId为空表示本设备
bundleName: ‘com.samples.stagemodelabilitydevelop’,
moduleName: ‘entry’, // moduleName非必选
abilityName: ‘FuncAbilityA’,
parameters: { // 自定义信息
info: ‘来自EntryAbility UIAbilityComponentsInteractive页面’
}
};
context.startAbilityForResult(want).then((data) => {
if (data?.resultCode === RESULT_CODE) {
// 解析被调用方UIAbility返回的信息
let info = data.want?.parameters?.info;
hilog.info(DOMAIN_NUMBER, TAG, JSON.stringify(info) ?? ‘’);
if (info !== null) {
promptAction.showToast({
message: JSON.stringify(info)
});
}
}
hilog.info(DOMAIN_NUMBER, TAG, JSON.stringify(data.resultCode) ?? ‘’