@ohos.bundle.overlay (overlay)

The overlay module provides APIs for installing a module with the overlay feature, querying the module information, and disabling and enabling the module.

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.

Modules to Import

import overlay from '@ohos.bundle.overlay';

overlay.setOverlayEnabled

setOverlayEnabled(moduleName:string, isEnabled: boolean): Promise<void>

Enables or disables a module with the overlay feature in the current application. This API uses a promise to return the result. If the operation is successful, null is returned; otherwise, an error message is returned.

System capability: SystemCapability.BundleManager.BundleFramework.Overlay

Parameters

Return value

Error codes

For details about the error codes, see Bundle Error Codes.

Example

import overlay from '@ohos.bundle.overlay';
import { BusinessError } from '@ohos.base';
let moduleName = "feature";
let isEnabled = false;

try {
    overlay.setOverlayEnabled(moduleName, isEnabled)
        .then(() => {
            console.info('setOverlayEnabled success');
        }).catch((err: BusinessError) => {
            console.info('setOverlayEnabled failed due to err code: ' + err.code + ' ' + 'message:' + err.message);
        });
} catch (err) {
    let code = (err as BusinessError).code;
    let message = (err as BusinessError).message;
    console.info('setOverlayEnabled failed due to err code: ' + code + ' ' + 'message:' + message);
}

overlay.setOverlayEnabled

setOverlayEnabled(moduleName:string, isEnabled: boolean, callback: AsyncCallback<void>): void

Enables or disables a module with the overlay feature in the current application. This API uses an asynchronous callback to return the result. If the operation is successful, null is returned; otherwise, an error message is returned.

System capability: SystemCapability.BundleManager.BundleFramework.Overlay

Parameters

Error codes

For details about the error codes, see Bundle Error Codes.

Example

import overlay from '@ohos.bundle.overlay';
import { BusinessError } from '@ohos.base';
let moduleName = "feature";
let isEnabled = false;

try {
    overlay.setOverlayEnabled(moduleName, isEnabled, (err, data) => {
        if (err) {
            console.info('setOverlayEnabled failed due to err code: ' + err.code + ' ' + 'message:' + err.message);
            return;
        }
        console.info('setOverlayEnabled success');
    });
} catch (err) {
    let code = (err as BusinessError).code;
    let message = (err as BusinessError).message;
    console.info('setOverlayEnabled failed due to err code: ' + code + ' ' + 'message:' + message);
}

overlay.getOverlayModuleInfo

getOverlayModuleInfo(moduleName: string): Promise<OverlayModuleInfo>

Obtains the information about a module with the overlay feature in the current application. This API uses a promise to return the result. If the operation is successful, null is returned; otherwise, an error message is returned.

System capability: SystemCapability.BundleManager.BundleFramework.Overlay

Parameters

Return value

Error codes

For details about the error codes, see Bundle Error Codes.

Example

import overlay from '@ohos.bundle.overlay';
import { BusinessError } from '@ohos.base';
let moduleName = "feature";

(async() => {
    try {
        let overlayModuleInfo = await overlay.getOverlayModuleInfo(moduleName);
        console.log('overlayModuleInfo is ' + JSON.stringify(overlayModuleInfo));
    } catch(err) {
        let code = (err as BusinessError).code;
        let message = (err as BusinessError).message;
        console.log('getOverlayModuleInfo failed due to err code : ' + code + ' ' + 'message :' + message);
    }
})();

overlay.getOverlayModuleInfo

getOverlayModuleInfo(moduleName: string, callback: AsyncCallback<OverlayModuleInfo>): void

Obtains the information about a module with the overlay feature in the current application. This API uses an asynchronous callback to return the result. If the operation is successful, null is returned; otherwise, an error message is returned.

System capability: SystemCapability.BundleManager.BundleFramework.Overlay

Parameters

Error codes

For details about the error codes, see Bundle Error Codes.

Example

import overlay from '@ohos.bundle.overlay';
import { BusinessError } from '@ohos.base';
let moduleName = "feature";
try {
    overlay.getOverlayModuleInfo(moduleName, (err, data) => {
        if (err) {
            console.log('getOverlayModuleInfo failed due to err code : ' + err.code + ' ' + 'message :' + err.message);
            return;
        }
        console.log('overlayModuleInfo is ' + JSON.stringify(data));
    });
} catch (err) {
    let code = (err as BusinessError).code;
    let message = (err as BusinessError).message;
    console.log('getOverlayModuleInfo failed due to err code : ' + code + ' ' + 'message :' + message);
}

overlay.getTargetOverlayModuleInfos

getTargetOverlayModuleInfos(targetModuleName: string): Promise<Array<OverlayModuleInfo>>

Obtains the information about modules with the overlay feature in the current application based on the target module name. This API uses a promise to return the result. If the operation is successful, null is returned; otherwise, an error message is returned.

System capability: SystemCapability.BundleManager.BundleFramework.Overlay

Parameters

Return value

Error codes

For details about the error codes, see Bundle Error Codes.

Example

import overlay from '@ohos.bundle.overlay';
import { BusinessError } from '@ohos.base';
let targetModuleName = "feature";

(async() => {
    try {
        let overlayModuleInfos = await overlay.getTargetOverlayModuleInfos(targetModuleName);
        console.log('overlayModuleInfos are ' + JSON.stringify(overlayModuleInfos));
    } catch(err) {
        let code = (err as BusinessError).code;
        let message = (err as BusinessError).message;
        console.log('getTargetOverlayModuleInfos failed due to err code : ' + code + ' ' + 'message :' + message);
    }
})();

overlay.getTargetOverlayModuleInfos

getTargetOverlayModuleInfos(targetModuleName: string, callback: AsyncCallback<Array<OverlayModuleInfo>>): void

Obtains the information about modules with the overlay feature in the current application based on the target module name. This API uses an asynchronous callback to return the result. If the operation is successful, null is returned; otherwise, an error message is returned.

System capability: SystemCapability.BundleManager.BundleFramework.Overlay

Parameters

Error codes

For details about the error codes, see Bundle Error Codes.

Example

import overlay from '@ohos.bundle.overlay';
import { BusinessError } from '@ohos.base';
let targetModuleName = "feature";
try {
    overlay.getTargetOverlayModuleInfos(targetModuleName, (err, data) => {
        if (err) {
            console.log('getTargetOverlayModuleInfos failed due to err code : ' + err.code + ' ' + 'message :' + err.message);
            return;
        }
        console.log('overlayModuleInfo is ' + JSON.stringify(data));
    });
} catch (err) {
    let code = (err as BusinessError).code;
    let message = (err as BusinessError).message;
    console.log('getTargetOverlayModuleInfos failed due to err code : ' + code + ' ' + 'message :' + message);
}

Module with the Overlay Feature

Concept

A module with the overlay feature generally provides additional resource files for modules without the overlay feature on the device, so that the target modules can use these resource files at runtime to display different colors, labels, themes, and the like. The overlay feature applies only to the stage model.

How do I identify a module with the overlay feature?

If the module.json5 file of a module contains the targetModuleName and targetPriority fields during project creation on DevEco Studio, the module is identified as a module with the overlay feature in the installation phase.