harmony 鸿蒙DriverExtensionContext

2023-10-30
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DriverExtensionContext

The DriverExtensionContext module provides the context of DriverExtensionAbility. It inherits from ExtensionContext.

The DriverExtensionContext module provides the operations that need to be actively initiated in the DriverExtensionAbility implementation.

NOTE

The initial APIs of this module are supported since API version 10. 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';

How to Use

Before using DriverExtensionContext, you need to obtain it through a DriverExtensionAbility child class instance.

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

  let context : DriverExtensionContext;
  class EntryAbility extends DriverExtensionAbility {
    onInit() {
      context = this.context; // Obtain DriverExtensionContext.
    }
  }

DriverExtensionContext.updateDriverState

updateDriverState(): void;

Updates the driver state. This interface is reserved and does not provide specific functionality currently.

System capability: SystemCapability.Driver.ExternalDevice

Example

  this.context.updateDriverState() ;

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