FormExtensionContext

FormExtensionContext模块是FormExtensionAbility的上下文环境,继承自ExtensionContext

FormExtensionContext模块提供FormExtensionAbility具有的接口和能力。

说明:

本模块首批接口从API version 9开始支持。后续版本的新增接口,采用上角标单独标记接口的起始版本。 本模块接口仅可在Stage模型下使用。

导入模块

import common from '@ohos.app.ability.common';

FormExtensionContext.startAbility

startAbility(want: Want, callback: AsyncCallback<void>): void

拉起一个卡片所属应用的Ability。使用callback异步回调。

系统接口:此接口为系统接口。

系统能力:SystemCapability.Ability.Form

错误码:

错误码ID 错误信息
202 The application is not a system application.
401 If the input parameter is not valid parameter.
16500050 An IPC connection error happened.
16500100 Failed to obtain the configuration information.
16501000 An internal functional error occurred.

以上错误码的详细介绍请参见卡片错误码

参数:

参数名 类型 必填 说明
want Want 包含bundleName,abilityName以及用户自定参数用于拉起Ability。
callback AsyncCallback<void> 回调函数。当拉起一个卡片所属应用的Ability成功,err为undefined,否则为错误对象。

示例:

import FormExtensionAbility from '@ohos.app.form.FormExtensionAbility';
import Want from '@ohos.app.ability.Want';
import Base from '@ohos.base';

export default class MyFormExtensionAbility extends FormExtensionAbility {
  onFormEvent(formId: string, message: string) {
    // 当触发卡片message事件时,执行startAbility
    console.log(`FormExtensionAbility onFormEvent, formId: ${formId}, message:${message}`);
    let want: Want = {
      deviceId: '',
      bundleName: 'com.example.formstartability',
      abilityName: 'EntryAbility',
      parameters: {
        'message': message
      }
    };
    this.context.startAbility(want, (error: Base.BusinessError) => {
      if (error) {
        console.error(`FormExtensionContext startAbility, error:${JSON.stringify(error)}`);
      } else {
        console.log('FormExtensionContext startAbility success');
      }
    });
  }
};

FormExtensionContext.startAbility

startAbility(want: Want): Promise<void>

拉起一个卡片所属应用的Ability。使用Promise异步回调。

系统接口:此接口为系统接口。

系统能力:SystemCapability.Ability.Form

参数:

参数名 类型 必填 说明
want Want 包含bundleName,abilityName以及用户自定参数用于拉起Ability。

返回值:

类型 说明
Promise<void> 无返回结果的Promise对象。

错误码:

错误码ID 错误信息
202 The application is not a system application.
401 If the input parameter is not valid parameter.
16500050 An IPC connection error happened.
16500100 Failed to obtain the configuration information.
16501000 An internal functional error occurred.

以上错误码的详细介绍请参见卡片错误码

示例:

import FormExtensionAbility from '@ohos.app.form.FormExtensionAbility';
import Want from '@ohos.app.ability.Want';
import Base from '@ohos.base';

export default class MyFormExtensionAbility extends FormExtensionAbility {
  onFormEvent(formId: string, message: string) {
    // 当触发卡片message事件时,执行startAbility
    console.log(`FormExtensionAbility onFormEvent, formId:${formId}, message:${message}`);
    let want: Want = {
      deviceId: '',
      bundleName: 'com.example.formstartability',
      abilityName: 'EntryAbility',
      parameters: {
        'message': message
      }
    };
    this.context.startAbility(want).then(() => {
      console.info('StartAbility Success');
    }).catch((error: Base.BusinessError) => {
      console.error(`StartAbility failed, error.code: ${error.code}, error.message: ${error.message}`);
    });
  }
};

FormExtensionContext.connectServiceExtensionAbility10+

connectServiceExtensionAbility(want: Want, options: ConnectOptions): number

将一个Ability与服务类型的Ability绑定。

系统能力:SystemCapability.Ability.Form

系统API: 此接口为系统接口,三方应用不支持调用。

参数:

参数名 类型 必填 说明
want Want Want类型参数,传入需要启动的ability的信息,如Ability名称,Bundle名称等。
options ConnectOptions ConnectOptions类型的回调函数,返回服务连接成功、断开或连接失败后的信息。

返回值:

类型 说明
number 返回一个connectId,后续根据此connectId断开连接。

错误码:

错误码ID 错误信息
16000001 The specified ability does not exist.
16000002 Incorrect ability type.
16000004 Can not start invisible component.
16000005 The specified process does not have the permission.
16000006 Cross-user operations are not allowed.
16000008 The crowdtesting application expires.
16000053 The ability is not on the top of the UI.
16000055 Installation-free timed out.
16000011 The context does not exist.
16000050 Internal error.

以上错误码详细介绍请参考元能力子系统错误码

示例:

import FormExtensionAbility from '@ohos.app.form.FormExtensionAbility';
import Want from '@ohos.app.ability.Want';
import rpc from '@ohos.rpc';
import Base from '@ohos.base';

let commRemote: rpc.IRemoteObject | null = null;
export default class MyFormExtensionAbility extends FormExtensionAbility {
  onFormEvent(formId: string, message: string) {
    // 当触发卡片message事件时,执行connectServiceExtensionAbility
    console.log(`FormExtensionAbility onFormEvent, formId:${formId}, message:${message}`);
    let want: Want = {
      deviceId: '',
      bundleName: 'com.example.formstartability',
      abilityName: 'EntryAbility',
      parameters: {
        'message': message
      }
    };
    let options: common.ConnectOptions = {
      onConnect(elementName, remote) { 
        commRemote = remote; // remote 用于与ServiceExtensionAbility进行通信
        console.log('----------- onConnect -----------'); 
      },
      onDisconnect(elementName) { console.log('----------- onDisconnect -----------') },
      onFailed(code) { console.error('----------- onFailed -----------') }
    };

    let connection: number | null = null;
    try {
      connection = this.context.connectServiceExtensionAbility(want, options);
    } catch (paramError) {
      // 处理入参错误异常
      console.error(`error.code: ${(paramError as Base.BusinessError).code}, error.message: ${(paramError as Base.BusinessError).message}`);
    }
  }
};

FormExtensionContext.disconnectServiceExtensionAbility10+

disconnectServiceExtensionAbility(connection: number, callback: AsyncCallback<void>): void

将一个Ability与绑定的服务类型的Ability解绑,断开连接之后需要将连接成功时返回的remote对象置空。

系统能力:SystemCapability.Ability.Form

系统API:此接口为系统接口,三方应用不支持调用。

参数:

参数名 类型 必填 说明
connection number connectServiceExtensionAbility中返回的number。
callback AsyncCallback<void> 回调函数。当Ability与绑定的服务类型的Ability解绑成功,err为undefined,否则为错误对象。

错误码:

错误码ID 错误信息
16000011 The context does not exist.
16000050 Internal error.

以上错误码详细介绍请参考元能力子系统错误码

示例:

import FormExtensionAbility from '@ohos.app.form.FormExtensionAbility';
import rpc from '@ohos.rpc';
import Base from '@ohos.base';

// commRemote为onConnect回调内返回的remote对象,此处定义为null无任何实际意义,仅作示例
let commRemote: rpc.IRemoteObject | null = null;
export default class MyFormExtensionAbility extends FormExtensionAbility {
  onFormEvent(formId: string, message: string) {
    // 实际使用时,connection为connectServiceExtensionAbility中的返回值,此处定义为1无任何实际意义,仅作示例
    let connection: number = 1;

    try {
      this.context.disconnectServiceExtensionAbility(connection, (error: Base.BusinessError) => {
        commRemote = null;
        if (error.code) {
          // 处理业务逻辑错误
          console.error(`disconnectServiceExtensionAbility failed, error.code: ${error.code}, error.message: ${error.message}`);
          return;
        }
        // 执行正常业务
        console.log('disconnectServiceExtensionAbility succeed');
      });
    } catch (paramError) {
      commRemote = null;
      // 处理入参错误异常
      console.error(`error.code: ${(paramError as Base.BusinessError).code}, error.message: ${(paramError as Base.BusinessError).message}`);
    }
  }
};

FormExtensionContext.disconnectServiceExtensionAbility10+

disconnectServiceExtensionAbility(connection: number): Promise<void>

将一个Ability与绑定的服务类型的Ability解绑,断开连接之后需要将连接成功时返回的remote对象置空(Promise形式返回结果)。

系统能力:SystemCapability.Ability.Form

系统API:此接口为系统接口,三方应用不支持调用。

参数:

参数名 类型 必填 说明
connection number connectServiceExtensionAbility中返回的number。

返回值:

类型 说明
Promise<void> Promise对象,无返回结果的Promise对象。

错误码:

错误码ID 错误信息
16000011 The context does not exist.
16000050 Internal error.

以上错误码详细介绍请参考元能力子系统错误码

示例:

import FormExtensionAbility from '@ohos.app.form.FormExtensionAbility';
import rpc from '@ohos.rpc';
import Base from '@ohos.base';

// commRemote为onConnect回调内返回的remote对象,此处定义为null无任何实际意义,仅作示例
let commRemote: rpc.IRemoteObject | null = null;
export default class MyFormExtensionAbility extends FormExtensionAbility {
  onFormEvent(formId: string, message: string) {
    // 实际使用时,connection为connectServiceExtensionAbility中的返回值,此处定义为1无任何实际意义,仅作示例
    let connection: number = 1;

    try {
      this.context.disconnectServiceExtensionAbility(connection)
        .then(() => {
          commRemote = null;
          // 执行正常业务
          console.log('disconnectServiceExtensionAbility succeed');
        })
        .catch((error: Base.BusinessError) => {
          commRemote = null;
          // 处理业务逻辑错误
          console.error(`disconnectServiceExtensionAbility failed, error.code: ${error.code}, error.message: ${error.message}`);
        });
    } catch (paramError) {
      commRemote = null;
      // 处理入参错误异常
      console.error(`error.code: ${(paramError as Base.BusinessError).code}, error.message: ${(paramError as Base.BusinessError).message}`);
    }
  }
};