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+# AbilityManager
+
+The **AbilityManager** module provides APIs for obtaining, adding, and modifying ability running information and state information.
+
+> **NOTE**
+>
+> The initial APIs of this module are supported since API version 8. Newly added APIs will be marked with a superscript to indicate their earliest API version. 
+> The APIs of this module are system APIs and cannot be called by third-party applications.
+
+# Modules to Import
+
+```js
+import AbilityManager from '@ohos.application.abilityManager'
+```
+
+## AbilityState
+
+Enumerates the ability states.
+
+**System capability**: SystemCapability.Ability.AbilityRuntime.Core
+
+| Name| Value| Description| 
+| -------- | -------- | -------- |
+| INITIAL | 0 | The ability is in the initial state.| 
+| FOREGROUND | 9 | The ability is in the foreground state. | 
+| BACKGROUND | 10 | The ability is in the background state. | 
+| FOREGROUNDING | 11 | The ability is in the foregrounding state. | 
+| BACKGROUNDING | 12 | The ability is in the backgrounding state. | 
+
+## updateConfiguration
+
+updateConfiguration(config: Configuration, callback: AsyncCallback\<void>): void
+
+Updates the configuration. This API uses an asynchronous callback to return the result.
+
+**Permission required**: ohos.permission.UPDATE_CONFIGURATION
+
+**System capability**: SystemCapability.Ability.AbilityRuntime.Core
+ 
+**Parameters**
+
+| Name       | Type                                      | Mandatory  | Description            |
+| --------- | ---------------------------------------- | ---- | -------------- |
+| config    | Configuration                            | Yes   | New configuration.|
+| callback  | AsyncCallback\<void>                   | Yes   | Callback used to return the result.     |
+
+**Example**
+
+```js
+import abilitymanager from '@ohos.application.abilityManager';
+
+var config = {
+  language: 'chinese' 
+}
+
+abilitymanager.updateConfiguration(config, () => {
+    console.log('------------ updateConfiguration -----------');
+})
+```
+
+## updateConfiguration
+
+updateConfiguration(config: Configuration): Promise\<void>
+
+Updates the configuration. This API uses a promise to return the result.
+
+**Permission required**: ohos.permission.UPDATE_CONFIGURATION
+
+**System capability**: SystemCapability.Ability.AbilityRuntime.Core
+
+**Parameters**
+
+| Name       | Type                                      | Mandatory  | Description            |
+| --------- | ---------------------------------------- | ---- | -------------- |
+| config    | Configuration                            | Yes   | New configuration.|
+
+**Return value**
+
+| Type                                      | Description     |
+| ---------------------------------------- | ------- |
+| Promise\<void> | Promise used to return the result.|
+
+**Example**
+
+```js
+import abilitymanager from '@ohos.application.abilityManager';
+
+var config = {
+  language: 'chinese' 
+}
+
+abilitymanager.updateConfiguration(config).then(() => {
+  console.log('updateConfiguration success');
+}).catch((err) => {
+  console.log('updateConfiguration fail');
+})
+```
+
+## getAbilityRunningInfos
+
+getAbilityRunningInfos(callback: AsyncCallback\<Array\<AbilityRunningInfo>>): void
+
+Obtains the ability running information. This API uses an asynchronous callback to return the result.
+
+**Required permissions**: ohos.permission.GET_RUNNING_INFO
+
+**System capability**: SystemCapability.Ability.AbilityRuntime.Core
+
+**Parameters**
+
+| Name       | Type                                      | Mandatory  | Description            |
+| --------- | ---------------------------------------- | ---- | -------------- |
+| callback  | AsyncCallback\<Array\<AbilityRunningInfo>>  | Yes   | Callback used to return the result.     |
+
+**Example**
+
+```js
+import abilitymanager from '@ohos.application.abilityManager';
+
+abilitymanager.getAbilityRunningInfos((err,data) => { 
+    console.log("getAbilityRunningInfos err: "  + err + " data: " + JSON.stringify(data));
+});
+```
+
+## getAbilityRunningInfos
+
+getAbilityRunningInfos(): Promise\<Array\<AbilityRunningInfo>>
+
+Obtains the ability running information. This API uses a promise to return the result.
+
+**Required permissions**: ohos.permission.GET_RUNNING_INFO
+
+**System capability**: SystemCapability.Ability.AbilityRuntime.Core
+
+**Return value**
+
+| Type                                      | Description     |
+| ---------------------------------------- | ------- |
+| Promise\<Array\<AbilityRunningInfo>> | Promise used to return the result.|
+
+**Example**
+
+```js
+import abilitymanager from '@ohos.application.abilityManager';
+ 
+abilitymanager.getAbilityRunningInfos().then((data) => {
+    console.log("getAbilityRunningInfos  data: " + JSON.stringify(data))
+}).catch((err) => {
+  console.log("getAbilityRunningInfos err: "  + err)
+});
+```
+
+## getExtensionRunningInfos<sup>9+</sup>
+
+getExtensionRunningInfos(upperLimit: number, callback: AsyncCallback\<Array\<ExtensionRunningInfo>>): void
+
+Obtains the extension running information. This API uses an asynchronous callback to return the result.
+
+**Required permissions**: ohos.permission.GET_RUNNING_INFO
+
+**System capability**: SystemCapability.Ability.AbilityRuntime.Core
+
+**Parameters**
+
+| Name       | Type                                      | Mandatory  | Description            |
+| --------- | ---------------------------------------- | ---- | -------------- |
+| upperLimit | number                                   | Yes| Maximum number of messages that can be obtained.|
+| callback  | AsyncCallback\<Array\<AbilityRunningInfo>>  | Yes   | Callback used to return the result.     |
+
+**Example**
+
+```js
+import abilitymanager from '@ohos.application.abilityManager';
+
+var upperLimit = 0;
+
+abilitymanager.getExtensionRunningInfos(upperLimit, (err,data) => { 
+    console.log("getExtensionRunningInfos err: "  + err + " data: " + JSON.stringify(data));
+});
+```
+
+## getExtensionRunningInfos<sup>9+</sup>
+
+getExtensionRunningInfos(upperLimit: number): Promise\<Array\<ExtensionRunningInfo>>
+
+Obtains the extension running information. This API uses a promise to return the result.
+ 
+**Required permissions**: ohos.permission.GET_RUNNING_INFO
+
+**System capability**: SystemCapability.Ability.AbilityRuntime.Core
+
+**Parameters**
+
+| Name       | Type                                      | Mandatory  | Description            |
+| --------- | ---------------------------------------- | ---- | -------------- |
+| upperLimit | number                                   | Yes| Maximum number of messages that can be obtained.|
+
+**Return value**
+
+| Type                                      | Description     |
+| ---------------------------------------- | ------- |
+| Promise\<Array\<AbilityRunningInfo>> | Promise used to return the result.|
+
+**Example**
+
+```js
+import abilitymanager from '@ohos.application.abilityManager';
+
+var upperLimit = 0;
+
+abilitymanager.getExtensionRunningInfos(upperLimit).then((data) => {
+  console.log("getAbilityRunningInfos data: " + JSON.stringify(data));
+}).catch((err) => {
+  console.log("getAbilityRunningInfos err: "  + err);
+})
+```
+
+## getTopAbility<sup>9+</sup>
+
+getTopAbility(callback: AsyncCallback\<ElementName>): void;
+
+Obtains the top ability, which is the ability that has the window focus. This API uses an asynchronous callback to return the result.
+
+**System capability**: SystemCapability.Ability.AbilityRuntime.Core
+
+**Parameters**
+
+| Name       | Type                                      | Mandatory  | Description            |
+| --------- | ---------------------------------------- | ---- | -------------- |
+| callback  | AsyncCallback\<ElementName>  | Yes   | Callback used to return the result.     |
+
+**Example**
+
+```js
+import abilitymanager from '@ohos.application.abilityManager';
+
+abilitymanager.getTopAbility((err,data) => { 
+    console.log("getTopAbility err: "  + err + " data: " + JSON.stringify(data));
+});
+```
+
+## getTopAbility<sup>9+</sup>
+
+getTopAbility(): Promise\<ElementName>;
+
+Obtains the top ability, which is the ability that has the window focus. This API uses a promise to return the result.
+ 
+**System capability**: SystemCapability.Ability.AbilityRuntime.Core
+
+**Return value**
+
+| Type                                      | Description     |
+| ---------------------------------------- | ------- |
+| Promise\<ElementName>| Promise used to return the result.|
+
+**Example**
+
+```js
+import abilitymanager from '@ohos.application.abilityManager';
+
+abilitymanager.getTopAbility().then((data) => {
+  console.log("getTopAbility data: " + JSON.stringify(data));
+}).catch((err) => {
+  console.log("getTopAbility err: "  + err);
+})
+```