# application_context.h


## 概述

声明应用级别的上下文能力。

**库**：libability_runtime.so

**系统能力**：SystemCapability.Ability.AbilityRuntime.Core

**起始版本**：13

**相关模块**：[AbilityRuntime](_ability_runtime.md)


## 汇总

### 文件

| 名称                                                | 描述                                                         |
| --------------------------------------------------- | ------------------------------------------------------------ |
| [application_context.h](application__context_8h.md) | 声明应用级别的上下文能力。<br/>**引用文件**：<AbilityKit/ability_runtime/application_context.h><br/>**库**：libability_runtime.so |

### 函数

| 名称                                                         | 描述                         |
| ------------------------------------------------------------ | ---------------------------- |
| [AbilityRuntime_ErrorCode](_ability_runtime.md#abilityruntime_errorcode) [OH_AbilityRuntime_ApplicationContextGetCacheDir](_ability_runtime.md#oh_abilityruntime_applicationcontextgetcachedir)(char* buffer, int32_t bufferSize, int32_t* writeLength) | 获取应用级别的缓存目录。     |
| [AbilityRuntime_ErrorCode](_ability_runtime.md#abilityruntime_errorcode) [OH_AbilityRuntime_ApplicationContextGetAreaMode](_ability_runtime.md#oh_abilityruntime_applicationcontextgetareamode)([AbilityRuntime_AreaMode](_ability_runtime.md#abilityruntime_areamode)* areaMode) | 获取应用级别的数据加密等级。 |
| [AbilityRuntime_ErrorCode](_ability_runtime.md#abilityruntime_errorcode) [OH_AbilityRuntime_ApplicationContextGetBundleName](_ability_runtime.md#oh_abilityruntime_applicationcontextgetbundlename)(char* buffer, int32_t bufferSize, int32_t* writeLength) | 获取应用包名。               |
| [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) | 获取应用级别的临时文件目录。   |
| [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) | 获取应用级别的通用文件目录。   |
| [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) | 获取应用级别的数据库文件目录。 |
| [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) | 获取应用级别的首选项文件目录。 |
| [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) | 获取应用级别的安装文件目录。   |
| [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) | 获取应用级别的分布式文件目录。 |
| [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) | 获取应用级别的云文件目录。     |
| [AbilityRuntime_ErrorCode](_ability_runtime.md#abilityruntime_errorcode) [OH_AbilityRuntime_StartSelfUIAbility](_ability_runtime.md#oh_abilityruntime_startselfuiability)([AbilityBase_Want](_ability_base.md#abilitybase_want) *want) | 启动当前应用的UIAbility。     |
| [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) | 启动当前应用的UIAbility。     |