1# AbilityConstant 2 3>  **NOTE** 4> 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. 5 6 7Provides parameters related to ability launch. 8 9 10## Modules to Import 11 12 13```js 14import AbilityConstant from '@ohos.application.AbilityConstant'; 15``` 16 17 18## Attributes 19 20**System capability**: SystemCapability.Ability.AbilityRuntime.Core 21 22| Name| Type| Readable| Writable| Description| 23| -------- | -------- | -------- | -------- | -------- | 24| launchReason | LaunchReason| Yes| Yes| Ability launch reason.| 25| lastExitReason | LastExitReason | Yes| Yes| Reason for the last exit.| 26 27## AbilityConstant.LaunchReason 28 29Enumerates ability launch reasons. 30 31**System capability**: SystemCapability.Ability.AbilityRuntime.Core 32 33| Name | Value | Description | 34| ----------------------------- | ---- | ------------------------------------------------------------ | 35| UNKNOWN | 0 | Unknown reason.| 36| START_ABILITY | 1 | Ability startup.| 37| CALL | 2 | Call.| 38| CONTINUATION | 3 | Ability continuation.| 39 40 41## AbilityConstant.LastExitReason 42 43Enumerates reasons for the last exit. 44 45**System capability**: SystemCapability.Ability.AbilityRuntime.Core 46 47| Name | Value | Description | 48| ----------------------------- | ---- | ------------------------------------------------------------ | 49| UNKNOWN | 0 | Unknown reason.| 50| ABILITY_NOT_RESPONDING | 1 | The ability does not respond.| 51| NORMAL | 2 | Normal status.| 52 53 54## AbilityConstant.OnContinueResult 55 56Enumerates ability continuation results. 57 58**System capability**: SystemCapability.Ability.AbilityRuntime.Core 59 60| Name | Value | Description | 61| ----------------------------- | ---- | ------------------------------------------------------------ | 62| AGREE | 0 | Continuation agreed.| 63| REJECT | 1 | Continuation denied.| 64| MISMATCH | 2 | Mismatch.| 65
