1# application_context.h 2 3 4## Overview 5 6The file declares the context capability at the application level. 7 8**Library**: libability_runtime.so 9 10**System capability**: SystemCapability.Ability.AbilityRuntime.Core 11 12**Since**: 13 13 14**Related module**: [AbilityRuntime](_ability_runtime.md) 15 16 17## Summary 18 19### Files 20 21| Name | Description | 22| --------------------------------------------------- | ------------------------------------------------------------ | 23| [application_context.h](application__context_8h.md) | Declares the context capability at the application level.<br>**File to include**: <AbilityKit/ability_runtime/application_context.h><br>**Library**: libability_runtime.so| 24 25### Functions 26 27| Name | Description | 28| ------------------------------------------------------------ | ---------------------------- | 29| [AbilityRuntime_ErrorCode](_ability_runtime.md#abilityruntime_errorcode) [OH_AbilityRuntime_ApplicationContextGetCacheDir](_ability_runtime.md#oh_abilityruntime_applicationcontextgetcachedir)(char* buffer, int32_t bufferSize, int32_t* writeLength) | Obtains the application-level cache directory. | 30| [AbilityRuntime_ErrorCode](_ability_runtime.md#abilityruntime_errorcode) [OH_AbilityRuntime_ApplicationContextGetAreaMode](_ability_runtime.md#oh_abilityruntime_applicationcontextgetareamode)([AbilityRuntime_AreaMode](_ability_runtime.md#abilityruntime_areamode)* areaMode) | Obtains the application-level data encryption level.| 31| [AbilityRuntime_ErrorCode](_ability_runtime.md#abilityruntime_errorcode) [OH_AbilityRuntime_ApplicationContextGetBundleName](_ability_runtime.md#oh_abilityruntime_applicationcontextgetbundlename)(char* buffer, int32_t bufferSize, int32_t* writeLength) | Obtains the bundle name of the application. | 32| [AbilityRuntime_ErrorCode](_ability_runtime.md#abilityruntime_errorcode) [OH_AbilityRuntime_ApplicationContextGetTempDir](_ability_runtime.md#oh_abilityruntime_applicationcontextgettempdir)(char* buffer, const int32_t bufferSize, int32_t* writeLength) | Obtains the application-level temporary file directory. | 33| [AbilityRuntime_ErrorCode](_ability_runtime.md#abilityruntime_errorcode) [OH_AbilityRuntime_ApplicationContextGetFilesDir](_ability_runtime.md#oh_abilityruntime_applicationcontextgetfilesdir)(char* buffer, const int32_t bufferSize, int32_t* writeLength) | Obtains the application-level common file directory. | 34| [AbilityRuntime_ErrorCode](_ability_runtime.md#abilityruntime_errorcode) [OH_AbilityRuntime_ApplicationContextGetDatabaseDir](_ability_runtime.md#oh_abilityruntime_applicationcontextgetdatabasedir)(char* buffer, const int32_t bufferSize, int32_t* writeLength) | Obtains the application-level database file directory.| 35| [AbilityRuntime_ErrorCode](_ability_runtime.md#abilityruntime_errorcode) [OH_AbilityRuntime_ApplicationContextGetPreferencesDir](_ability_runtime.md#oh_abilityruntime_applicationcontextgetpreferencesdir)(char* buffer, const int32_t bufferSize, int32_t* writeLength) | Obtains the application-level preferences file directory.| 36| [AbilityRuntime_ErrorCode](_ability_runtime.md#abilityruntime_errorcode) [OH_AbilityRuntime_ApplicationContextGetBundleCodeDir](_ability_runtime.md#oh_abilityruntime_applicationcontextgetbundlecodedir)(char* buffer, const int32_t bufferSize, int32_t* writeLength) | Obtains the application-level installation file directory. | 37| [AbilityRuntime_ErrorCode](_ability_runtime.md#abilityruntime_errorcode) [OH_AbilityRuntime_ApplicationContextGetDistributedFilesDir](_ability_runtime.md#oh_abilityruntime_applicationcontextgetdistributedfilesdir)(char* buffer, const int32_t bufferSize, int32_t* writeLength) | Obtains the application-level distributed file directory.| 38| [AbilityRuntime_ErrorCode](_ability_runtime.md#abilityruntime_errorcode) [OH_AbilityRuntime_ApplicationContextGetCloudFileDir](_ability_runtime.md#oh_abilityruntime_applicationcontextgetcloudfiledir)(char* buffer, const int32_t bufferSize, int32_t* writeLength) | Obtains the application-level cloud file directory. | 39| [AbilityRuntime_ErrorCode](_ability_runtime.md#abilityruntime_errorcode) [OH_AbilityRuntime_ApplicationContextGetResourceDir](_ability_runtime.md#oh_abilityruntime_applicationcontextgetresourcedir)(const char* moduleName, char* buffer, const int32_t bufferSize, int32_t* writeLength) | Obtains the application-level resource directory. | 40| [AbilityRuntime_ErrorCode](_ability_runtime.md#abilityruntime_errorcode) [OH_AbilityRuntime_StartSelfUIAbility](_ability_runtime.md#oh_abilityruntime_startselfuiability)([AbilityBase_Want](_ability_base.md#abilitybase_want) *want) | Starts the UIAbility of the current application. | 41| [AbilityRuntime_ErrorCode](_ability_runtime.md#abilityruntime_errorcode) [OH_AbilityRuntime_StartSelfUIAbilityWithStartOptions](_ability_runtime.md#oh_abilityruntime_startselfuiabilitywithstartoptions)([AbilityBase_Want](_ability_base.md#abilitybase_want) *want, [AbilityRuntime_StartOptions](_ability_runtime.md#abilityruntime_startoptions) *options) | Starts the UIAbility of the current application. | 42