ExtensionContext

The ExtensionContext module, inherited from Context, implements the context for Extension abilities.

This module provides APIs for accessing resources of a specific Extension ability. An Extension ability can use the context directly provided by ExtensionContext or that extended from ExtensionContext.

NOTE

  • The initial APIs of this module are supported since API version 9. Newly added APIs will be marked with a superscript to indicate their earliest API version.
  • The APIs of this module can be used only in the stage model.

Modules to Import

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

Attributes

Atomic service API: This API can be used in atomic services since API version 11.

System capability: SystemCapability.Ability.AbilityRuntime.Core

Name Type Readable Writable Description
currentHapModuleInfo HapModuleInfo Yes No Information about the HAP file.
(See api\bundle\hapModuleInfo.d.ts in the SDK directory.)
config Configuration Yes No Module configuration information.
(See api@ohos.app.ability.Configuration.d.ts in the SDK directory.)
extensionAbilityInfo ExtensionAbilityInfo Yes No Extension ability information.
(See api\bundle\extensionAbilityInfo.d.ts in the SDK directory.)

When to Use

ExtensionContext provides information about an Extension ability, module, and HAP file. You can use the information based on service requirements.

Example

// Singleton object GlobalContext.ts
export class GlobalContext {
  private static instance: GlobalContext;
  private _objects = new Map<string, Object>();

  private constructor() {
  }

  public static getContext(): GlobalContext {
    if (!GlobalContext.instance) {
      GlobalContext.instance = new GlobalContext();
    }
    return GlobalContext.instance;
  }

  getObject(value: string): Object | undefined {
    return this._objects.get(value);
  }

  setObject(key: string, objectClass: Object): void {
    this._objects.set(key, objectClass);
  }
}

import FormExtensionAbility from '@ohos.app.form.FormExtensionAbility';
import Want from '@ohos.app.ability.Want';
import formBindingData from '@ohos.app.form.formBindingData';
import { GlobalContext } from '../GlobalContext';

export default class MyFormExtensionAbility extends FormExtensionAbility {
  onAddForm(want: Want) {
    console.log(`FormExtensionAbility onAddForm, want: ${want.abilityName}`);
    let dataObj1: Record<string, string> = {
      'temperature': '11c',
      'time': '11:00'
    };
    GlobalContext.getContext().setObject("ExtensionContext", this.context);
    let obj1: formBindingData.FormBindingData = formBindingData.createFormBindingData(dataObj1);
    return obj1;
  }
};