harmony(鸿蒙)FormExtensionContext

2022-08-09
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FormExtensionContext

The FormExtensionContext module, inherited from ExtensionContext, provides context for Form Extension abilities.

You can use the APIs of this module to start Form Extension abilities.

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.

Usage

Before using the ServiceExtensionContext module, you must first obtain a FormExtension instance.

import FormExtension from '@ohos.application.FormExtension';
import formBindingData from '@ohos.application.formBindingData'
export default class MyFormExtension extends FormExtension {
    onCreate() {
        let dataObj1 = {
            temperature:"11c",
            "time":"11:00"
        };
        let obj1 = formBindingData.createFormBindingData(dataObj1);
        return obj1;
    }
}

FormExtensionContext.startAbility

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

Starts an ability. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Ability.Form

System API: This is a system API and cannot be called by third-party applications.

Parameters

Name	Type	Mandatory	Description
want	Want	Yes	Information about the ability to start, such as the ability name and bundle name.
callback	AsyncCallback<void>	Yes	Callback used to return the result.

Example

var want = {
    deviceId: "",
    bundleName: "com.example.formstartability",
    abilityName: "MainAbility",
    action: "action1",
    entities: ["entity1"],
    type: "MIMETYPE",
    uri: "key={true,true,false}",
    parameters: {}
}
this.context.startAbility(want, function(err) {
    console.info(err.code);
})

FormExtensionContext.startAbility

startAbility(want: Want): Promise<void>

Starts an ability. This API uses a promise to return the result.

System capability: SystemCapability.Ability.Form

System API: This is a system API and cannot be called by third-party applications.

Parameters

Name	Type	Mandatory	Description
want	Want	Yes	Information about the ability to start, such as the ability name and bundle name.

Return value

Type	Description
Promise<void<	Promise used to return the result.

Example

var want = {
    deviceId: "",
    bundleName: "com.example.formstartability",
    abilityName: "MainAbility",
    action: "action1",
    entities: ["entity1"],
    type: "MIMETYPE",
    uri: "key={true,true,false}",
    parameters: {}
}
this.context.startAbility(want).then(() => {
    console.info("StartAbility Success");
}).catch((error) => {
    console.info("StartAbility failed");
});