js-apis-missionManager.md

# missionManager

The **missionManager** module provides APIs to lock, unlock, and clear missions, and switch a mission to the foreground.

> **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.

## Modules to Import

```
import missionManager from '@ohos.application.missionManager'
```

## Required Permissions

ohos.permission.MANAGE_MISSIONS

## missionManager.registerMissionListener

registerMissionListener(listener: MissionListener): number;

Registers a listener to observe the mission status.

**Required permission**: ohos.permission.MANAGE_MISSIONS

**System capability**: SystemCapability.Ability.AbilityRuntime.Mission

**System API**: This is a system API and cannot be called by third-party applications.

**Parameters**

  | Name| Type| Mandatory| Description|
  | -------- | -------- | -------- | -------- |
  | listener | MissionListener | Yes| Listener to register.|

**Return value**

  | Type| Description|
  | -------- | -------- |
  | number | Returns the unique index of the mission status listener, which is created by the system and allocated when the listener is registered.|

**Example**

```js
  var listener = {
      onMissionCreated: function (mission) {console.log("--------onMissionCreated-------")},
      onMissionDestroyed: function (mission) {console.log("--------onMissionDestroyed-------")},
      onMissionSnapshotChanged: function (mission) {console.log("--------onMissionSnapshotChanged-------")},
      onMissionMovedToFront: function (mission) {console.log("--------onMissionMovedToFront-------")},
      onMissionIconUpdated: function (mission, icon) {console.log("--------onMissionIconUpdated-------")},
      onMissionClosed: function (mission) {console.log("--------onMissionClosed-------")}
  };
  console.log("registerMissionListener")
  var listenerid = missionManager.registerMissionListener(listener);
```


## missionManager.unregisterMissionListener

unregisterMissionListener(listenerId: number, callback: AsyncCallback<void>): void;

Deregisters a mission status listener. This API uses an asynchronous callback to return the result.

**Required permission**: ohos.permission.MANAGE_MISSIONS

**System capability**: SystemCapability.Ability.AbilityRuntime.Mission

**System API**: This is a system API and cannot be called by third-party applications.

**Parameters**

  | Name| Type| Mandatory| Description|
  | -------- | -------- | -------- | -------- |
  | listenerId | number | Yes| Unique index of the mission status listener to unregister. It is returned by **registerMissionListener**.|
  | callback | AsyncCallback<void> | Yes| Callback used to return the result.|

**Example**

```js
  var listener = {
      onMissionCreated: function (mission) {console.log("--------onMissionCreated-------")},
      onMissionDestroyed: function (mission) {console.log("--------onMissionDestroyed-------")},
      onMissionSnapshotChanged: function (mission) {console.log("--------onMissionSnapshotChanged-------")},
      onMissionMovedToFront: function (mission) {console.log("--------onMissionMovedToFront-------")},
      onMissionIconUpdated: function (mission, icon) {console.log("--------onMissionIconUpdated-------")},
      onMissionClosed: function (mission) {console.log("--------onMissionClosed-------")}
  };
  console.log("registerMissionListener")
  var listenerid = missionManager.registerMissionListener(listener);

  missionManager.unregisterMissionListener(listenerid, (error) => {
      console.log("unregisterMissionListener");
  })
```


## missionManager.unregisterMissionListener

unregisterMissionListener(listenerId: number): Promise<void>;

Deregisters a mission status listener. This API uses a promise to return the result.

**Required permission**: ohos.permission.MANAGE_MISSIONS

**System capability**: SystemCapability.Ability.AbilityRuntime.Mission

**System API**: This is a system API and cannot be called by third-party applications.

**Parameters**

  | Name| Type| Mandatory| Description|
  | -------- | -------- | -------- | -------- |
  | listenerId | number | Yes| Unique index of the mission status listener to unregister. It is returned by **registerMissionListener**.|

**Return value**

  | Type| Description| 
  | -------- | -------- |
  | Promise<void> | Promise used to return the result.| 

**Example**

```js
  var listener = {
      onMissionCreated: function (mission) {console.log("--------onMissionCreated-------")},
      onMissionDestroyed: function (mission) {console.log("--------onMissionDestroyed-------")},
      onMissionSnapshotChanged: function (mission) {console.log("--------onMissionSnapshotChanged-------")},
      onMissionMovedToFront: function (mission) {console.log("--------onMissionMovedToFront-------")},
      onMissionIconUpdated: function (mission, icon) {console.log("--------onMissionIconUpdated-------")},
      onMissionClosed: function (mission) {console.log("--------onMissionClosed-------")}
  };
  console.log("registerMissionListener")
  var listenerid = missionManager.registerMissionListener(listener);

  missionManager.unregisterMissionListener(listenerid).catch(function (err) {
      console.log(err);
  });
```


## missionManager.getMissionInfo

getMissionInfo(deviceId: string, missionId: number, callback: AsyncCallback<MissionInfo>): void;

Obtains the information about a given mission. This API uses an asynchronous callback to return the result.

**Required permission**: ohos.permission.MANAGE_MISSIONS

**System capability**: SystemCapability.Ability.AbilityRuntime.Mission

**System API**: This is a system API and cannot be called by third-party applications.

**Parameters**

  | Name| Type| Mandatory| Description|
  | -------- | -------- | -------- | -------- |
  | deviceId | string | Yes| Device ID. It is a null string by default for the local device.|
  | missionId | number | Yes| Mission ID.|
  | callback | AsyncCallback<[MissionInfo](#missioninfo)> | Yes| Callback used to return the mission information obtained.|

**Example**

  ```js
  import missionManager from '@ohos.application.missionManager'

  var allMissions=missionManager.getMissionInfos("",10).catch(function(err){console.log(err);});
      missionManager.getMissionInfo("", allMissions[0].missionId, (error, mission) => {
        console.log("getMissionInfo is called, error.code = " + error.code)
        console.log("mission.missionId = " + mission.missionId);
        console.log("mission.runningState = " + mission.runningState);
        console.log("mission.lockedState = " + mission.lockedState);
        console.log("mission.timestamp = " + mission.timestamp);
        console.log("mission.label = " + mission.label);
        console.log("mission.iconPath = " + mission.iconPath);
      });
  ```


## missionManager.getMissionInfo

getMissionInfo(deviceId: string, missionId: number): Promise<MissionInfo>;

Obtains the information about a given mission. This API uses a promise to return the result.

**Required permission**: ohos.permission.MANAGE_MISSIONS

**System capability**: SystemCapability.Ability.AbilityRuntime.Mission

**System API**: This is a system API and cannot be called by third-party applications.

**Parameters**

  | Name| Type| Mandatory| Description|
  | -------- | -------- | -------- | -------- |
  | deviceId | string | Yes| Device ID. It is a null string by default for the local device.|
  | missionId | number | Yes| Mission ID.|

**Return value**

  | Type| Description|
  | -------- | -------- |
  | Promise<[MissionInfo](#missioninfo)> | Promise used to return the mission information obtained.|

**Example**

  ```js
  import missionManager from '@ohos.application.missionManager'

  var mission = missionManager.getMissionInfo("", 10).catch(function (err){
      console.log(err);
  });
  ```


## missionManager.getMissionInfos

getMissionInfos(deviceId: string, numMax: number, callback: AsyncCallback<Array<MissionInfo>>): void;

Obtains information about all missions. This API uses an asynchronous callback to return the result.

**Required permission**: ohos.permission.MANAGE_MISSIONS

**System capability**: SystemCapability.Ability.AbilityRuntime.Mission

**System API**: This is a system API and cannot be called by third-party applications.

**Parameters**

  | Name| Type| Mandatory| Description|
  | -------- | -------- | -------- | -------- |
  | deviceId | string | Yes| Device ID. It is a null string by default for the local device.|
  | numMax | number | Yes| Maximum number of missions whose information can be obtained.|
  | callback | AsyncCallback<Array<[MissionInfo](#missioninfo)>> | Yes| Callback used to return the array of mission information obtained.|

**Example**

  ```js
  import missionManager from '@ohos.application.missionManager'

  missionManager.getMissionInfos("", 10, (error, missions) => {
      console.log("getMissionInfos is called, error.code = " + error.code);
      console.log("size = " + missions.length);
      console.log("missions = " + JSON.stringify(missions));
  })
  ```


## missionManager.getMissionInfos

getMissionInfos(deviceId: string, numMax: number): Promise<Array<MissionInfo>>;

Obtains information about all missions. This API uses a promise to return the result.

**Required permission**: ohos.permission.MANAGE_MISSIONS

**System capability**: SystemCapability.Ability.AbilityRuntime.Mission

**System API**: This is a system API and cannot be called by third-party applications.

**Parameters**

  | Name| Type| Mandatory| Description|
  | -------- | -------- | -------- | -------- |
  | deviceId | string | Yes| Device ID. It is a null string by default for the local device.|
  | numMax | number | Yes| Maximum number of missions whose information can be obtained.|

**Return value**

  | Type| Description|
  | -------- | -------- |
  | Promise<Array<[MissionInfo](#missioninfo)>> | Promise used to return the array of mission information obtained.|

**Example**

  ```js
  import missionManager from '@ohos.application.missionManager'

  var allMissions = missionManager.getMissionInfos("", 10).catch(function (err){
      console.log(err);
  });
  ```


## missionManager.getMissionSnapShot

getMissionSnapShot(deviceId: string, missionId: number, callback: AsyncCallback<MissionSnapshot>): void;

Obtains the snapshot of a given mission. This API uses an asynchronous callback to return the result.

**Required permission**: ohos.permission.MANAGE_MISSIONS

**System capability**: SystemCapability.Ability.AbilityRuntime.Mission

**System API**: This is a system API and cannot be called by third-party applications.

**Parameters**

  | Name| Type| Mandatory| Description|
  | -------- | -------- | -------- | -------- |
  | deviceId | string | Yes| Device ID. It is a null string by default for the local device.|
  | missionId | number | Yes| Mission ID.|
  | callback | AsyncCallback<[MissionSnapshot](js-apis-application-MissionSnapshot.md)> | Yes| Callback used to return the snapshot information obtained.|

**Example**

  ```js
  import missionManager from '@ohos.application.missionManager'

  missionManager.getMissionInfos("", 10, (error, missions) => {
    console.log("getMissionInfos is called, error.code = " + error.code);
    console.log("size = " + missions.length);
    console.log("missions = " + JSON.stringify(missions));
    var id = missions[0].missionId;

    missionManager.getMissionSnapShot("", id, (error, snapshot) => {
  	console.log("getMissionSnapShot is called, error.code = " + error.code);
  	console.log("bundleName = " + snapshot.ability.bundleName);
  })
  })
  ```


## missionManager.getMissionSnapShot

getMissionSnapShot(deviceId: string, missionId: number): Promise<MissionSnapshot>;

Obtains the snapshot of a given mission. This API uses a promise to return the result.

**Required permission**: ohos.permission.MANAGE_MISSIONS

**System capability**: SystemCapability.Ability.AbilityRuntime.Mission

**System API**: This is a system API and cannot be called by third-party applications.

**Parameters**

  | Name| Type| Mandatory| Description|
  | -------- | -------- | -------- | -------- |
  | deviceId | string | Yes| Device ID. It is a null string by default for the local device.|
  | missionId | number | Yes| Mission ID.|

**Return value**

  | Type| Description|
  | -------- | -------- |
  | Promise<[MissionSnapshot](js-apis-application-MissionSnapshot.md)> | Promise used to return the snapshot information obtained.|

**Example**

  ```js
  import missionManager from '@ohos.application.missionManager'

  var allMissions;
  missionManager.getMissionInfos("",10).then(function(res){
    allMissions=res;
    }).catch(function(err){console.log(err);});
    console.log("size = " + allMissions.length);
    console.log("missions = " + JSON.stringify(allMissions));
    var id = allMissions[0].missionId;

    var snapshot = missionManager.getMissionSnapShot("", id).catch(function (err){
        console.log(err);
    });
  ```

## missionManager.getLowResolutionMissionSnapShot<sup>9+</sup>

getLowResolutionMissionSnapShot(deviceId: string, missionId: number, callback: AsyncCallback\<MissionSnapshot>): void;

Obtains the low-resolution snapshot of a given mission. This API uses an asynchronous callback to return the result.

**Required permission**: ohos.permission.MANAGE_MISSIONS

**System capability**: SystemCapability.Ability.AbilityRuntime.Mission

**System API**: This is a system API and cannot be called by third-party applications.

**Parameters**

  | Name| Type| Mandatory| Description|
  | -------- | -------- | -------- | -------- |
  | deviceId | string | Yes| Device ID. It is a null string by default for the local device.|
  | missionId | number | Yes| Mission ID.|
  | callback | AsyncCallback&lt;[MissionSnapshot](js-apis-application-MissionSnapshot.md)&gt; | Yes| Callback used to return the snapshot information obtained.|

**Example**

  ```js
  import missionManager from '@ohos.application.missionManager'

  missionManager.getMissionInfos("", 10, (error, missions) => {
    console.log("getMissionInfos is called, error.code = " + error.code);
    console.log("size = " + missions.length);
    console.log("missions = " + JSON.stringify(missions));
    var id = missions[0].missionId;

    missionManager.getLowResolutionMissionSnapShot("", id, (error, snapshot) => {
  	console.log("getLowResolutionMissionSnapShot is called, error.code = " + error.code);
  	console.log("bundleName = " + snapshot.ability.bundleName);
  })
  })
  ```


## missionManager.getLowResolutionMissionSnapShot<sup>9+</sup>

getLowResolutionMissionSnapShot(deviceId: string, missionId: number): Promise\<MissionSnapshot>;

Obtains the low-resolution snapshot of a given mission. This API uses a promise to return the result.

**Required permission**: ohos.permission.MANAGE_MISSIONS

**System capability**: SystemCapability.Ability.AbilityRuntime.Mission

**System API**: This is a system API and cannot be called by third-party applications.

**Parameters**

  | Name| Type| Mandatory| Description|
  | -------- | -------- | -------- | -------- |
  | deviceId | string | Yes| Device ID. It is a null string by default for the local device.|
  | missionId | number | Yes| Mission ID.|

**Return value**

  | Type| Description|
  | -------- | -------- |
  | Promise&lt;[MissionSnapshot](js-apis-application-MissionSnapshot.md)&gt; | Promise used to return the snapshot information obtained.|

**Example**

  ```js
  import missionManager from '@ohos.application.missionManager'

  var allMissions;
  missionManager.getMissionInfos("",10).then(function(res){
    allMissions=res;
    }).catch(function(err){console.log(err);});
    console.log("size = " + allMissions.length);
    console.log("missions = " + JSON.stringify(allMissions));
    var id = allMissions[0].missionId;

    var snapshot = missionManager.getLowResolutionMissionSnapShot("", id).catch(function (err){
        console.log(err);
    });
  ```


## missionManager.lockMission

lockMission(missionId: number, callback: AsyncCallback&lt;void&gt;): void;

Locks a given mission. This API uses an asynchronous callback to return the result.

**Required permission**: ohos.permission.MANAGE_MISSIONS

**System capability**: SystemCapability.Ability.AbilityRuntime.Mission

**System API**: This is a system API and cannot be called by third-party applications.

**Parameters**

  | Name| Type| Mandatory| Description|
  | -------- | -------- | -------- | -------- |
  | missionId | number | Yes| Mission ID.|
  | callback | AsyncCallback&lt;void&gt; | Yes| Callback used to return the result.|

**Example**

  ```js
  import missionManager from '@ohos.application.missionManager'

  missionManager.getMissionInfos("", 10, (error, missions) => {
    console.log("getMissionInfos is called, error.code = " + error.code);
    console.log("size = " + missions.length);
    console.log("missions = " + JSON.stringify(missions));
    var id = missions[0].missionId;

    missionManager.lockMission(id).then(() => {
  	console.log("lockMission is called ");
  });
  });
  ```


## missionManager.lockMission

lockMission(missionId: number): Promise&lt;void&gt;;

Locks a given mission. This API uses a promise to return the result.

**Required permission**: ohos.permission.MANAGE_MISSIONS

**System capability**: SystemCapability.Ability.AbilityRuntime.Mission

**System API**: This is a system API and cannot be called by third-party applications.

**Parameters**

  | Name| Type| Mandatory| Description|
  | -------- | -------- | -------- | -------- |
  | missionId | number | Yes| Mission ID.|

**Return value**

  | Type| Description| 
  | -------- | -------- |
  | Promise&lt;void&gt; | Promise used to return the result.| 

**Example**

  ```js
  import missionManager from '@ohos.application.missionManager'
  var allMissions;
  missionManager.getMissionInfos("",10).then(function(res){
    allMissions=res;
  }).catch(function(err){console.log(err);});
  console.log("size = " + allMissions.length);
  console.log("missions = " + JSON.stringify(allMissions));
  var id = allMissions[0].missionId;

  missionManager.lockMission(id).catch(function (err){
      console.log(err);
  });
  ```


## missionManager.unlockMission

unlockMission(missionId: number, callback: AsyncCallback&lt;void&gt;): void;

Unlocks a given mission. This API uses an asynchronous callback to return the result.

**Required permission**: ohos.permission.MANAGE_MISSIONS

**System capability**: SystemCapability.Ability.AbilityRuntime.Mission

**System API**: This is a system API and cannot be called by third-party applications.

**Parameters**

| Name| Type| Mandatory| Description|
| -------- | -------- | -------- | -------- |
| missionId | number | Yes| Mission ID.|
| callback | AsyncCallback&lt;void&gt; | Yes| Callback used to return the result.|

**Example**

  ```js
  import missionManager from '@ohos.application.missionManager'

  missionManager.getMissionInfos("", 10, (error, missions) => {
    console.log("getMissionInfos is called, error.code = " + error.code);
    console.log("size = " + missions.length);
    console.log("missions = " + JSON.stringify(missions));
    var id = missions[0].missionId;

    missionManager.unlockMission(id).then(() => {
  	console.log("unlockMission is called ");
  });
  });
  ```


## missionManager.unlockMission

unlockMission(missionId: number): Promise&lt;void&gt;;

Unlocks a given mission. This API uses a promise to return the result.

**Required permission**: ohos.permission.MANAGE_MISSIONS

**System capability**: SystemCapability.Ability.AbilityRuntime.Mission

**System API**: This is a system API and cannot be called by third-party applications.

**Parameters**

  | Name| Type| Mandatory| Description|
  | -------- | -------- | -------- | -------- |
  | missionId | number | Yes| Mission ID.|

**Return value**

  | Type| Description| 
  | -------- | -------- |
  | Promise&lt;void&gt; | Promise used to return the result.| 

**Example**

  ```js
  import missionManager from '@ohos.application.missionManager'

  var allMissions;
  missionManager.getMissionInfos("",10).then(function(res){
    allMissions=res;
  }).catch(function(err){console.log(err);});
  console.log("size = " + allMissions.length);
  console.log("missions = " + JSON.stringify(allMissions));
  var id = allMissions[0].missionId;

  missionManager.lockMission(id).catch(function (err){
      console.log(err);
  });
  missionManager.unlockMission(id).catch(function (err){
      console.log(err);
  });
  ```


## missionManager.clearMission

clearMission(missionId: number, callback: AsyncCallback&lt;void&gt;): void;

Clears a given mission, regardless of whether it is locked. This API uses an asynchronous callback to return the result.

**Required permission**: ohos.permission.MANAGE_MISSIONS

**System capability**: SystemCapability.Ability.AbilityRuntime.Mission

**System API**: This is a system API and cannot be called by third-party applications.

**Parameters**

  | Name| Type| Mandatory| Description|
  | -------- | -------- | -------- | -------- |
  | missionId | number | Yes| Mission ID.|
  | callback | AsyncCallback&lt;void&gt; | Yes| Callback used to return the result.|

**Example**

  ```js
  import missionManager from '@ohos.application.missionManager'

  missionManager.getMissionInfos("", 10, (error, missions) => {
    console.log("getMissionInfos is called, error.code = " + error.code);
    console.log("size = " + missions.length);
    console.log("missions = " + JSON.stringify(missions));
    var id = missions[0].missionId;

    missionManager.clearMission(id).then(() => {
  	console.log("clearMission is called ");
  });
  });
  ```


## missionManager.clearMission

clearMission(missionId: number): Promise&lt;void&gt;;

Clears a given mission, regardless of whether it is locked. This API uses a promise to return the result.

**Required permission**: ohos.permission.MANAGE_MISSIONS

**System capability**: SystemCapability.Ability.AbilityRuntime.Mission

**System API**: This is a system API and cannot be called by third-party applications.

**Parameters**

  | Name| Type| Mandatory| Description|
  | -------- | -------- | -------- | -------- |
  | missionId | number | Yes| Mission ID.|

**Return value**

  | Type| Description| 
  | -------- | -------- |
  | Promise&lt;void&gt; | Promise used to return the result.| 

**Example**

  ```js
  import missionManager from '@ohos.application.missionManager'

  var allMissions;
  missionManager.getMissionInfos("",10).then(function(res){
    allMissions=res;
  }).catch(function(err){console.log(err);});
  console.log("size = " + allMissions.length);
  console.log("missions = " + JSON.stringify(allMissions));
  var id = allMissions[0].missionId;

  missionManager.clearMission(id).catch(function (err){
    console.log(err);
  });
  ```


## missionManager.clearAllMissions

clearAllMissions(callback: AsyncCallback&lt;void&gt;): void;

Clears all unlocked missions. This API uses an asynchronous callback to return the result.

**Required permission**: ohos.permission.MANAGE_MISSIONS

**System capability**: SystemCapability.Ability.AbilityRuntime.Mission

**System API**: This is a system API and cannot be called by third-party applications.

**Example**

  ```js
  import missionManager from '@ohos.application.missionManager'

  missionManager.clearAllMissions().then(() => {
    console.log("clearAllMissions is called ");
  });
  ```


## missionManager.clearAllMissions

clearAllMissions(): Promise&lt;void&gt;;

Clears all unlocked missions. This API uses a promise to return the result.

**Required permission**: ohos.permission.MANAGE_MISSIONS

**System capability**: SystemCapability.Ability.AbilityRuntime.Mission

**System API**: This is a system API and cannot be called by third-party applications.

**Return value**

  | Type| Description| 
  | -------- | -------- |
  | Promise&lt;void&gt; | Promise used to return the result.| 

**Example**

  ```js
  import missionManager from '@ohos.application.missionManager'
  missionManager.clearAllMissions().catch(function (err){
    console.log(err);
  });
  ```


## missionManager.moveMissionToFront

moveMissionToFront(missionId: number, callback: AsyncCallback&lt;void&gt;): void;

Switches a given mission to the foreground. This API uses an asynchronous callback to return the result.

**Required permission**: ohos.permission.MANAGE_MISSIONS

**System capability**: SystemCapability.Ability.AbilityRuntime.Mission

**System API**: This is a system API and cannot be called by third-party applications.

**Parameters**

  | Name| Type| Mandatory| Description|
  | -------- | -------- | -------- | -------- |
  | missionId | number | Yes| Mission ID.|
  | callback | AsyncCallback&lt;void&gt; | Yes| Callback used to return the result.|

**Example**

  ```js
  import missionManager from '@ohos.application.missionManager'

  missionManager.getMissionInfos("", 10, (error, missions) => {
    console.log("getMissionInfos is called, error.code = " + error.code);
    console.log("size = " + missions.length);
    console.log("missions = " + JSON.stringify(missions));
    var id = missions[0].missionId;

    missionManager.moveMissionToFront(id).then(() => {
  	console.log("moveMissionToFront is called ");
  });
  });
  ```


## missionManager.moveMissionToFront

moveMissionToFront(missionId: number, options: StartOptions, callback: AsyncCallback&lt;void&gt;): void;

Switches a given mission to the foreground, with the startup parameters for the switching specified. This API uses an asynchronous callback to return the result.

**Required permission**: ohos.permission.MANAGE_MISSIONS

**System capability**: SystemCapability.Ability.AbilityRuntime.Mission

**System API**: This is a system API and cannot be called by third-party applications.

**Parameters**

  | Name| Type| Mandatory| Description|
  | -------- | -------- | -------- | -------- |
  | missionId | number | Yes| Mission ID.|
  | options | [StartOptions](js-apis-application-StartOptions.md) | Yes| Startup parameters, which are used to specify the window mode and device ID for switching the mission to the foreground.|
  | callback | AsyncCallback&lt;void&gt; | Yes| Callback used to return the result.|

**Example**

  ```js
  import missionManager from '@ohos.application.missionManager'

  missionManager.getMissionInfos("", 10, (error, missions) => {
    console.log("getMissionInfos is called, error.code = " + error.code);
    console.log("size = " + missions.length);
    console.log("missions = " + JSON.stringify(missions));
    var id = missions[0].missionId;

    missionManager.moveMissionToFront(id,{windowMode : 101}).then(() => {
  	console.log("moveMissionToFront is called ");
    });
  });
  ```


## missionManager.moveMissionToFront

moveMissionToFront(missionId: number, options?: StartOptions): Promise&lt;void&gt;;

Switches a given mission to the foreground, with the startup parameters for the switching specified. This API uses a promise to return the result.

**Required permission**: ohos.permission.MANAGE_MISSIONS

**System capability**: SystemCapability.Ability.AbilityRuntime.Mission

**System API**: This is a system API and cannot be called by third-party applications.

**Parameters**

  | Name| Type| Mandatory| Description|
  | -------- | -------- | -------- | -------- |
  | missionId | number | Yes| Mission ID.|
  | options | [StartOptions](js-apis-application-StartOptions.md) | No| Startup parameters, which are used to specify the window mode and device ID for switching the mission to the foreground.|

**Return value**

  | Type| Description| 
  | -------- | -------- |
  | Promise&lt;void&gt; | Promise used to return the result.| 

**Example**

  ```js
  import missionManager from '@ohos.application.missionManager'

  var allMissions;
  missionManager.getMissionInfos("",10).then(function(res){
    allMissions=res;
  }).catch(function(err){console.log(err);});
  console.log("size = " + allMissions.length);
  console.log("missions = " + JSON.stringify(allMissions));
  var id = allMissions[0].missionId;

  missionManager.moveMissionToFront(id).catch(function (err){
    console.log(err);
  });
  ```

## MissionInfo

Describes the mission information.

**System capability**: SystemCapability.Ability.AbilityRuntime.Mission

**System API**: This is a system API and cannot be called by third-party applications.

| Name| Type| Readable| Writable| Description| 
| -------- | -------- | -------- | -------- | -------- |
| missionId | number | Yes| Yes| Mission ID.| 
| runningState | number | Yes| Yes| Running state of the mission.| 
| lockedState | boolean | Yes| Yes| Locked state of the mission.| 
| timestamp | string | Yes| Yes| Latest time when the mission was created or updated.| 
| want | [Want](js-apis-application-Want.md) | Yes| Yes| **Want** information of the mission.| 
| label | string | Yes| Yes| Label of the mission.| 
| iconPath | string | Yes| Yes| Path of the mission icon.| 
| continuable | boolean | Yes| Yes| Whether the mission can be continued on another device.|