harmony 鸿蒙@ohos.app.ability.errorManager (ErrorManager)
@ohos.app.ability.errorManager (ErrorManager)
The ErrorManager module provides APIs for registering and deregistering error observers. For example, you can use the APIs to register an observer when your application wants to capture JS crashes.
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.
Modules to Import
import errorManager from '@ohos.app.ability.errorManager';
ErrorManager.on(type: ‘error’, observer: ErrorObserver)(deprecated)
on(type: ‘error’, observer: ErrorObserver): number;
Registers an error observer.
NOTE
This API is supported since API version 9 and deprecated since API version 10. You are advised to use ErrorManager.on(type: ‘errorEvent’, observer: ErrorObserver).
System capability: SystemCapability.Ability.AbilityRuntime.Core
Parameters
Name | Type | Mandatory | Description |
---|---|---|---|
type | string | Yes | Type of the API to call. It is fixed at “error”. |
observer | ErrorObserver | Yes | Digital code of the observer. |
Return value
Type | Description |
---|---|
number | Index of the observer. |
Error codes
ID | Error Message |
---|---|
16000003 | Id does not exist. |
For details about the error codes, see Ability Error Codes.
Example
import errorManager from '@ohos.app.ability.errorManager';
import { BusinessError } from '@ohos.base';
let observer: errorManager.ErrorObserver = {
onUnhandledException(errorMsg) {
console.log('onUnhandledException, errorMsg: ', errorMsg);
},
onException(errorObj) {
console.log('onException, name: ', errorObj.name);
console.log('onException, message: ', errorObj.message);
if (typeof(errorObj.stack) === 'string') {
console.log('onException, stack: ', errorObj.stack);
}
}
};
let observerId = -1;
try {
observerId = errorManager.on('error', observer);
} catch (paramError) {
let code = (paramError as BusinessError).code;
let message = (paramError as BusinessError).message;
console.error(`error: ${code}, ${message}`);
}
ErrorManager.off(type: ‘error’, observerId: number, callback: AsyncCallback<void>)(deprecated)
off(type: ‘error’, observerId: number, callback: AsyncCallback<void>): void;
Deregisters an error observer. This API uses an asynchronous callback to return the result.
NOTE
This API is supported since API version 9 and deprecated since API version 10. You are advised to use ErrorManager.off(type: ‘errorEvent’, observerId: number).
System capability: SystemCapability.Ability.AbilityRuntime.Core
Parameters
Name | Type | Mandatory | Description |
---|---|---|---|
type | string | Yes | Type of the API to call. It is fixed at “error”. |
observerId | number | Yes | Index of the observer returned by on(). |
callback | AsyncCallback<void> | Yes | Callback used to return the result. |
Error codes
ID | Error Message |
---|---|
16000003 | Id does not exist. |
For details about the error codes, see Ability Error Codes.
Example
import errorManager from '@ohos.app.ability.errorManager';
import { BusinessError } from '@ohos.base';
let observerId = 100;
function unregisterErrorObserverCallback(err: BusinessError) {
if (err) {
console.error('------------ unregisterErrorObserverCallback ------------', err);
}
}
try {
errorManager.off('error', observerId, unregisterErrorObserverCallback);
} catch (paramError) {
let code = (paramError as BusinessError).code;
let message = (paramError as BusinessError).message;
console.error(`error: ${code}, ${message}`);
}
ErrorManager.off(type: ‘error’, observerId: number)(deprecated)
off(type: ‘error’, observerId: number): Promise<void>;
Deregisters an error observer. This API uses a promise to return the result.
NOTE
This API is supported since API version 9 and deprecated since API version 10. You are advised to use ErrorManager.off(type: ‘errorEvent’, observerId: number).
System capability: SystemCapability.Ability.AbilityRuntime.Core
Parameters
Name | Type | Mandatory | Description |
---|---|---|---|
type | string | Yes | Type of the API to call. It is fixed at “error”. |
observerId | number | Yes | Index of the observer returned by on(). |
Return value
Type | Description |
---|---|
Promise<void> | Promise used to return the result. |
Error codes
ID | Error Message |
---|---|
16000003 | Id does not exist. |
For details about the error codes, see Ability Error Codes.
Example
import errorManager from '@ohos.app.ability.errorManager';
import { BusinessError } from '@ohos.base';
let observerId = 100;
try {
errorManager.off('error', observerId)
.then((data) => {
console.log('----------- unregisterErrorObserver success ----------', data);
})
.catch((err: BusinessError) => {
console.error('----------- unregisterErrorObserver fail ----------', err);
});
} catch (paramError) {
let code = (paramError as BusinessError).code;
let message = (paramError as BusinessError).message;
console.error(`error: ${code}, ${message}`);
}
ErrorManager.on(type: ‘errorEvent’, observer: ErrorObserver)10+
on(type: ‘errorEvent’, observer: ErrorObserver): number;
Registers an error observer.
System capability: SystemCapability.Ability.AbilityRuntime.Core
Parameters
Name | Type | Mandatory | Description |
---|---|---|---|
type | string | Yes | Type of the API to call. It is fixed at ‘errorEvent’. |
observer | ErrorObserver | Yes | Digital code of the observer. |
Return value
Type | Description |
---|---|
number | Index of the observer. |
Error codes
ID | Error Message |
---|---|
16000003 | Id does not exist. |
For details about the error codes, see Ability Error Codes.
Example
import errorManager from '@ohos.app.ability.errorManager';
import { BusinessError } from '@ohos.base';
let observer: errorManager.ErrorObserver = {
onUnhandledException(errorMsg) {
console.log('onUnhandledException, errorMsg: ', errorMsg);
},
onException(errorObj) {
console.log('onException, name: ', errorObj.name);
console.log('onException, message: ', errorObj.message);
if (typeof(errorObj.stack) === 'string') {
console.log('onException, stack: ', errorObj.stack);
}
}
};
let observerId = -1;
try {
observerId = errorManager.on('errorEvent', observer);
} catch (paramError) {
let code = (paramError as BusinessError).code;
let message = (paramError as BusinessError).message;
console.error(`error: ${code}, ${message}`);
}
ErrorManager.off(type: ‘errorEvent’, observerId: number)10+
off(type: ‘errorEvent’, observerId: number): void;
Deregisters an error observer.
System capability: SystemCapability.Ability.AbilityRuntime.Core
Parameters
Name | Type | Mandatory | Description |
---|---|---|---|
type | string | Yes | Type of the API to call. It is fixed at ‘errorEvent’. |
observerId | number | Yes | Index of the observer returned by on(). |
callback | AsyncCallback<void> | Yes | Callback used to return the result. |
Error codes
ID | Error Message |
---|---|
16000003 | Id does not exist. |
For details about the error codes, see Ability Error Codes.
Example
import errorManager from '@ohos.app.ability.errorManager';
import { BusinessError } from '@ohos.base';
let observerId = 100;
try {
errorManager.off('errorEvent', observerId);
} catch (paramError) {
let code = (paramError as BusinessError).code;
let message = (paramError as BusinessError).message;
console.error(`error: ${code}, ${message}`);
}
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