@ohos.application.appManager (appManager)

The appManager module implements application management. You can use the APIs of this module to query whether the application is undergoing a stability test, whether the application is running on a RAM constrained device, the memory size of the application, and information about the running process.

NOTE

The APIs of this module are supported since API version 8 and deprecated since API version 9. You are advised to use @ohos.app.ability.appManager instead. Newly added APIs will be marked with a superscript to indicate their earliest API version.

Modules to Import

import appManager from '@ohos.application.appManager';

appManager.isRunningInStabilityTest

isRunningInStabilityTest(callback: AsyncCallback<boolean>): void

Checks whether this application is undergoing a stability test. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Ability.AbilityRuntime.Core

Parameters

Example

  import appManager from '@ohos.application.appManager';

  appManager.isRunningInStabilityTest((error, flag) => {
    if (error && error.code !== 0) {
        console.error(`isRunningInStabilityTest fail, error: ${JSON.stringify(error)}`);
    } else {
        console.log(`isRunningInStabilityTest success, the result is: ${JSON.stringify(flag)}`);
    }
  });

appManager.isRunningInStabilityTest

isRunningInStabilityTest(): Promise<boolean>

Checks whether this application is undergoing a stability test. This API uses a promise to return the result.

System capability: SystemCapability.Ability.AbilityRuntime.Core

Return value

Example

  import appManager from '@ohos.application.appManager';
  import { BusinessError } from '@ohos.base';

  appManager.isRunningInStabilityTest().then((flag) => {
      console.log(`The result of isRunningInStabilityTest is: ${JSON.stringify(flag)}`);
  }).catch((error: BusinessError) => {
      console.error(`error: ${JSON.stringify(error)}`);
  });

appManager.isRamConstrainedDevice⁷⁺

isRamConstrainedDevice(): Promise<boolean>

Checks whether this application is running on a RAM constrained device. This API uses a promise to return the result.

System capability: SystemCapability.Ability.AbilityRuntime.Core

Return value

Example

  import appManager from '@ohos.application.appManager';
  import { BusinessError } from '@ohos.base';

  appManager.isRamConstrainedDevice().then((data) => {
      console.log(`The result of isRamConstrainedDevice is: ${JSON.stringify(data)}`);
  }).catch((error: BusinessError) => {
      console.error(`error: ${JSON.stringify(error)}`);
  });

appManager.isRamConstrainedDevice⁷⁺

isRamConstrainedDevice(callback: AsyncCallback<boolean>): void

Checks whether this application is running on a RAM constrained device. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Ability.AbilityRuntime.Core

Parameters

Example

  import appManager from '@ohos.application.appManager';

  appManager.isRamConstrainedDevice((error, data) => {
      if (error && error.code !== 0) {
          console.error(`isRamConstrainedDevice fail, error: ${JSON.stringify(error)}`);
      } else {
          console.log(`The result of isRamConstrainedDevice is: ${JSON.stringify(data)}`);
      }
  });

appManager.getAppMemorySize⁷⁺

getAppMemorySize(): Promise<number>

Obtains the memory size of this application. This API uses a promise to return the result.

System capability: SystemCapability.Ability.AbilityRuntime.Core

Return value

Example

  import appManager from '@ohos.application.appManager';
  import { BusinessError } from '@ohos.base';

  appManager.getAppMemorySize().then((data) => {
      console.log(`The size of app memory is: ${JSON.stringify(data)}`);
  }).catch((error: BusinessError) => {
      console.error(`error: ${JSON.stringify(error)}`);
  });

appManager.getAppMemorySize⁷⁺

getAppMemorySize(callback: AsyncCallback<number>): void

Obtains the memory size of this application. This API uses an asynchronous callback to return the result.

System capability: SystemCapability.Ability.AbilityRuntime.Core

Parameters

Example

  import appManager from '@ohos.application.appManager';

  appManager.getAppMemorySize((error, data) => {
      if (error && error.code !== 0) {
          console.error(`getAppMemorySize fail, error: ${JSON.stringify(error)}`);
      } else {
          console.log(`The size of app memory is: ${JSON.stringify(data)}`);
      }
  });

appManager.getProcessRunningInfos^(deprecated)

getProcessRunningInfos(): Promise<Array<ProcessRunningInfo>>

Obtains information about the running processes. This API uses a promise to return the result.

This API is deprecated since API version 9. You are advised to use appManager.getRunningProcessInformation instead.

Required permissions: ohos.permission.GET_RUNNING_INFO (available only for system applications)

System capability: SystemCapability.Ability.AbilityRuntime.Core

Return value

Example

  import appManager from '@ohos.application.appManager';
  import { BusinessError } from '@ohos.base';

  appManager.getProcessRunningInfos().then((data) => {
      console.log(`The process running infos is: ${JSON.stringify(data)}`);
  }).catch((error: BusinessError) => {
      console.error(`error: ${JSON.stringify(error)}`);
  });

appManager.getProcessRunningInfos^(deprecated)

getProcessRunningInfos(callback: AsyncCallback<Array<ProcessRunningInfo>>): void

Obtains information about the running processes. This API uses an asynchronous callback to return the result.

This API is deprecated since API version 9. You are advised to use appManager.getRunningProcessInformation instead.

Required permissions: ohos.permission.GET_RUNNING_INFO (available only for system applications)

System capability: SystemCapability.Ability.AbilityRuntime.Core

Parameters

Example

  import appManager from '@ohos.application.appManager';

  appManager.getProcessRunningInfos((error, data) => {
      if (error && error.code !== 0) {
          console.error(`getProcessRunningInfos fail, error: ${JSON.stringify(error)}`);
      } else {
          console.log(`getProcessRunningInfos success, data: ${JSON.stringify(data)}`);
      }
  });

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