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1# @ohos.app.businessAbilityRouter (Business Ability Router)
2
3The **businessAbilityRouter** module provides APIs for you to query the business ability information of applications installed on the device. It provides a unified template for you to register standard services by type. Based on the information, a system application or third-party application can obtain services that meet certain criteria and select a proper service. The module also provides unified rules to manage redirection between applications and services. It prevents arbitrary switching between the foreground and background and avoids the distribution of third-party applications by means of redirection.
4
5> **NOTE**
6>
7> 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.
8
9The APIs provided by this module are system APIs.
10
11## Modules to Import
12
13``` ts
14import businessAbilityRouter from '@ohos.app.businessAbilityRouter';
15```
16
17## Required Permissions
18
19| Permission                                      | Permission Level    | Description                |
20| ------------------------------------------ | ------------ | -------------------- |
21| ohos.permission.GET_BUNDLE_INFO_PRIVILEGED | system_basic | Permission to query information about all bundles.|
22
23For details, see [Permission Levels](../../security/accesstoken-overview.md#permission-levels).
24
25## BusinessType
26
27Enumerates the types of business abilities.
28
29**System capability**: SystemCapability.Ability.AbilityRuntime.Core
30
31**System API**: This is a system API.
32
33| Name       | Value  | Description                                |
34| ----------- | ---- | ------------------------------------ |
35| SHARE       | 0    | Business ability of the share type.|
36| UNSPECIFIED | 255  | Business ability of an unspecified type.  |
37
38## BusinessAbilityFilter
39
40Describes the criteria for filtering business abilities.
41
42**System capability**: SystemCapability.Ability.AbilityRuntime.Core
43
44**System API**: This is a system API.
45
46| Name        | Type        | Readable| Writable| Description                                  |
47| ------------ | ------------ | ---- | ---- | -------------------------------------- |
48| businessType | BusinessType | Yes  | No  | Type of the business ability.          |
49| mimeType     | string       | Yes  | No  | MIME type supported by the business ability.|
50| uri          | string       | Yes  | No  | URI supported by the business ability.       |
51
52## businessAbilityRouter.queryBusinessAbilityInfo
53
54queryBusinessAbilityInfo(filter: BusinessAbilityFilter, callback: AsyncCallback\<Array\<BusinessAbilityInfo\>\>): void;
55
56Obtains the business ability information based on the specified filter criteria. This API uses an asynchronous callback to return the result. If the operation is successful, the business ability information is returned; otherwise, an error object is returned.
57
58**Required permissions**: ohos.permission.GET_BUNDLE_INFO_PRIVILEGED
59
60**System capability**: SystemCapability.Ability.AbilityRuntime.Core
61
62**System API**: This is a system API.
63
64**Parameters**
65
66| Name      | Type    | Mandatory  | Description                                   |
67| ----------- | ------ | ---- | --------------------------------------- |
68| filter | [BusinessAbilityFilter](#businessabilityfilter) | Yes   | Object used to filter the business abilities.|
69| callback | AsyncCallback\<Array\<[BusinessAbilityInfo](js-apis-bundleManager-businessAbilityInfo.md#businessabilityinfo)\>\> | Yes| Callback used to return the result. If the operation is successful, the business ability information that meets the filter criteria is returned; otherwise, an error object is returned.|
70
71**Example**
72
73```ts
74import businessAbilityRouter from '@ohos.app.businessAbilityRouter';
75import { BusinessError } from '@ohos.base';
76
77let filter: businessAbilityRouter.BusinessAbilityFilter = {businessType: businessAbilityRouter.BusinessType.SHARE};
78
79try {
80    businessAbilityRouter.queryBusinessAbilityInfo(filter)
81        .then(() => {
82            console.info('queryBusinessAbilityInfo success');
83        }).catch((error: BusinessError) => {
84            console.error('queryBusinessAbilityInfo failed ' + error.message);
85        });
86} catch (error) {
87    let message = (error as BusinessError).message;
88    console.error('queryBusinessAbilityInfo failed ' + message);
89}
90```
91
92## businessAbilityRouter.queryBusinessAbilityInfo
93
94queryBusinessAbilityInfo(filter: BusinessAbilityFilter): Promise\<Array\<BusinessAbilityInfo\>\>;
95
96Obtains the business ability information based on the specified filter criteria. This API uses a promise to return the result. If the operation is successful, the business ability information is returned; otherwise, an error object is returned.
97
98**Required permissions**: ohos.permission.GET_BUNDLE_INFO_PRIVILEGED
99
100**System capability**: SystemCapability.Ability.AbilityRuntime.Core
101
102**System API**: This is a system API.
103
104**Parameters**
105
106| Name      | Type                             | Mandatory  | Description                                   |
107| ----------- | ------------------------------- | ---- | --------------------------------------- |
108| filter | [BusinessAbilityFilter](#businessabilityfilter) | Yes   | Object used to filter the business abilities. |
109
110**Return value**
111
112| Type                                                        | Description                                       |
113| ------------------------------------------------------------ | ------------------------------------------- |
114| Promise\<Array\<[BusinessAbilityInfo](js-apis-bundleManager-businessAbilityInfo.md#businessabilityinfo)\>\> | Promise used to return the business ability information that meets the filter criteria.|
115
116**Example**
117
118```ts
119import businessAbilityRouter from '@ohos.app.businessAbilityRouter';
120import { BusinessError } from '@ohos.base';
121
122let filter: businessAbilityRouter.BusinessAbilityFilter = {businessType: businessAbilityRouter.BusinessType.SHARE};
123
124try {
125    businessAbilityRouter.queryBusinessAbilityInfo(filter, (error, data) => {
126        if (error) {
127            console.error('queryBusinessAbilityInfo failed ' + error.message);
128            return;
129        }
130        console.info('queryBusinessAbilityInfo success');
131    });
132} catch (error) {
133    let message = (error as BusinessError).message;
134    console.error('queryBusinessAbilityInfo failed ' + message);
135}
136```
137