This is documentation for the next SDK version. For up-to-date documentation, see the latest version (SDK 55).

Expo 应用程序

一个通用库，在运行时提供有关原生应用程序的 ID、应用名称和构建版本的信息。

Android

iOS

tvOS

Web

Included in Expo Go

GitHub

npm

更新日志

expo-application 在运行时提供有关原生应用的 ID、应用名称和构建版本的有用信息。

安装

Terminal

- npx expo install expo-application

If you are installing this in an existing React Native app, make sure to install expo in your project.

API

import * as Application from 'expo-application';

Constants

`Application.applicationId`

Android

iOS

tvOS

Web

Type: string | null

The ID of the application. On Android, this is the application ID. On iOS, this is the bundle ID. On web, this is null.

Example

"com.cocoacasts.scribbles", "com.apple.Pages"

`Application.applicationName`

Android

iOS

tvOS

Web

Type: string | null

The human-readable name of the application that is displayed with the app's icon on the device's home screen or desktop. On Android and iOS, this value is a string unless the name could not be retrieved, in which case this value will be null. On web this value is null.

Example

"Expo", "Yelp", "Instagram"

`Application.nativeApplicationVersion`

Android

iOS

tvOS

Web

Type: string | null

The human-readable version of the native application that may be displayed in the app store. At time when native app is built, on Android, this is the version name set by version in app config, and on iOS, the Info.plist value for CFBundleShortVersionString. On web, this value is null.

Example

"2.11.0"

`Application.nativeBuildVersion`

Android

iOS

tvOS

Web

Type: string | null

The internal build version of the native application that the app stores may use to distinguish between different binaries. At the time when native app is built, On Android, this is the version code set by android.versionCode in app config, and on iOS, the Info.plist value for CFBundleVersion (set with ios.buildNumber value in app config in a standalone app). On web, this value is null. The return type on Android and iOS is string.

Example

"114"

Methods

`Application.getAndroidId()`

Android

Gets the value of Settings.Secure.ANDROID_ID. This is a hexadecimal string unique to each combination of app-signing key, user, and device. The value may change if a factory reset is performed on the device or if an APK signing key changes. For more information about how the platform handles ANDROID_ID in Android 8.0 (API level 26) and higher, see Android 8.0 Behavior Changes. On iOS and web, this function is unavailable.

In versions of the platform lower than Android 8.0 (API level 26), this value remains constant for the lifetime of the user's device. See the ANDROID_ID official docs for more information.

Returns:

string

Example

Application.getAndroidId();
// "dd96dec43fb81c97"

`Application.getInstallationTimeAsync()`

Android

iOS

tvOS

Web

Gets the time the app was installed onto the device, not counting subsequent updates. If the app is uninstalled and reinstalled, this method returns the time the app was reinstalled.

On Android, this method uses PackageInfo.firstInstallTime.
On iOS, this method uses the NSFileCreationDate of the app's document root directory.
On web, this method returns null.

Returns:

Promise<Date>

A Promise that fulfills with a Date object that specifies the time the app was installed on the device.

Example

await Application.getInstallationTimeAsync();
// 2019-07-18T18:08:26.121Z

`Application.getInstallReferrerAsync()`

Android

Gets the referrer URL of the installed app with the Install Referrer API from the Google Play Store. In practice, the referrer URL may not be a complete, absolute URL.

Returns:

Promise<string>

A Promise that fulfills with a string of the referrer URL of the installed app.

Example

await Application.getInstallReferrerAsync();
// "utm_source=google-play&utm_medium=organic"

`Application.getIosApplicationReleaseTypeAsync()`

iOS

Gets the iOS application release type.

Returns:

Promise<ApplicationReleaseType>

A Promise which fulfills with an ApplicationReleaseType.

`Application.getIosIdForVendorAsync()`

iOS

Gets the iOS "identifier for vendor" (IDFV) value, a string ID that uniquely identifies a device to the app’s vendor. This method may sometimes return nil, in which case wait and call the method again later. This might happen when the device has been restarted before the user has unlocked the device.

The OS will change the vendor identifier if all apps from the current app's vendor have been uninstalled.

Returns:

Promise<string | null>

A Promise that fulfills with a string specifying the app's vendor ID. Apps from the same vendor will return the same ID. See Apple's documentation for more information about the vendor ID's semantics.

Example

await Application.getIosIdForVendorAsync();
// "68753A44-4D6F-1226-9C60-0050E4C00067"

`Application.getIosPushNotificationServiceEnvironmentAsync()`

iOS

Gets the current Apple Push Notification (APN) service environment.

Returns:

Promise<PushNotificationServiceEnvironment>

A Promise that fulfills with the string, either 'development' or 'production', based on the current APN environment, or null on the simulator as it does not support registering with APNs.

`Application.getLastUpdateTimeAsync()`

Android

Gets the last time the app was updated from the Google Play Store.

Returns:

Promise<Date>

A Promise that fulfills with a Date object that specifies the last time the app was updated via the Google Play Store.

Example

await Application.getLastUpdateTimeAsync();
// 2019-07-18T21:20:16.887Z

Types

`PushNotificationServiceEnvironment`

iOS

Literal Type: union

Maps to the aps-environment key in the native target's registered entitlements.

Acceptable values are: 'development' | 'production' | null

Enums

`ApplicationReleaseType`

iOS

`UNKNOWN`

ApplicationReleaseType.UNKNOWN ＝ 0

`SIMULATOR`

ApplicationReleaseType.SIMULATOR ＝ 1

`ENTERPRISE`

ApplicationReleaseType.ENTERPRISE ＝ 2

`DEVELOPMENT`

ApplicationReleaseType.DEVELOPMENT ＝ 3

`AD_HOC`

ApplicationReleaseType.AD_HOC ＝ 4

`APP_STORE`

ApplicationReleaseType.APP_STORE ＝ 5

错误代码

Code	Description
`ERR_APPLICATION_PACKAGE_NAME_NOT_FOUND`	`getInstallationTimeAsync` 和 `getLastUpdateTimeAsync` 抛出的错误代码。如果无法检索包信息或包名，则可能会抛出此错误。
`ERR_APPLICATION_INSTALL_REFERRER_UNAVAILABLE`	当前的 Play 商店应用不提供 installation referrer API，或者可能未安装 Play 商店。在某些未预装 Play 商店的 AVD 上测试时可能会出现此错误，例如 Google Pixel 3 和 Nexus 6。
`ERR_APPLICATION_INSTALL_REFERRER_CONNECTION`	无法与 Google Play 商店建立连接。
`ERR_APPLICATION_INSTALL_REFERRER_REMOTE_EXCEPTION`	在与 Play 商店建立连接后抛出了 `RemoteException`。如果承载远程对象的进程已不可用，就可能发生这种情况，通常意味着该进程已崩溃。有关更多信息，请参阅 this StackOverflow answer on `RemoteException`。
`ERR_APPLICATION_INSTALL_REFERRER`	`getInstallReferrerAsync` 方法的通用默认错误代码。如果在获取 install referrer 时发生异常，但该异常不属于其他更精确的错误类型，则会抛出此错误代码。错误信息会附带 `responseCode`。
`ERR_APPLICATION_INSTALL_REFERRER_SERVICE_DISCONNECTED`	与 install referrer 服务的连接已丢失。当尝试连接并设置 install referrer 服务，但连接中断时会抛出此错误。更多信息请参阅 Android 文档。