Expo 应用

一个通用库，在运行时提供原生应用的 ID、应用名称和构建版本信息。

Android

iOS

tvOS

Web

expo-application 提供有关原生应用本身的有用信息，例如 ID、应用名称和构建版本。

¥expo-application provides useful information about the native application, itself, such as the ID, app name, and build version.

安装

¥Installation

Terminal

- npx expo install expo-application

If you are installing this in an existing React Native app (bare workflow), start by installing expo in your project. Then, follow the additional instructions as mentioned by library's README under "Installation in bare React Native projects" section.

API

import * as Application from 'expo-application';

Constants

`Application.applicationId`

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`

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`

Type: string | null

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

Example

"2.11.0"

`Application.nativeBuildVersion`

Type: string | null

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

Example

Android: "114", iOS: "2.11.0"

Methods

Only for:

Android

`Application.getAndroidId()`

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

"dd96dec43fb81c97"

Only for:

Android

`Application.getInstallReferrerAsync()`

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.getInstallationTimeAsync()`

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

Returns:

Promise<Date>

Returns 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

Only for:

iOS

`Application.getIosApplicationReleaseTypeAsync()`

Gets the iOS application release type.

Returns:

Promise<ApplicationReleaseType>

Returns a promise which fulfills with an ApplicationReleaseType.

Only for:

iOS

`Application.getIosIdForVendorAsync()`

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"

Only for:

iOS

`Application.getIosPushNotificationServiceEnvironmentAsync()`

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

Returns:

Promise<PushNotificationServiceEnvironment>

Returns a promise fulfilled 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.

Only for:

Android

`Application.getLastUpdateTimeAsync()`

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

Returns:

Promise<Date>

Returns 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`

Literal Type: multiple types

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

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

代码	描述
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称，则可能会抛出此错误。
ERR_APPLICATION_INSTALL_REFERRER_UNAVAILABLE	当前的 Play 商店应用不提供安装引用 API，或者 Play 商店可能无法安装。在未预装 Play 商店的 AVD（例如 Google Pixel 3 和 Nexus 6）上进行测试时，可能会出现此错误代码。
ERR_APPLICATION_INSTALL_REFERRER_CONNECTION	无法与 Google Play 商店建立连接。
ERR_APPLICATION_INSTALL_REFERRER_REMOTE_EXCEPTION	与 Play 商店建立连接后抛出 `RemoteException`。如果托管远程对象的进程不再可用，则可能会发生这种情况，这通常意味着进程崩溃。参见 https://stackoverflow.com/questions/3156389/android-remoteexceptions-and-services。
ERR_APPLICATION_INSTALL_REFERRER	`getInstallReferrerAsync` 方法的一般默认情况错误代码。如果获取安装引荐来源网址时发生异常，则会抛出此错误代码，但该异常不是更精确的错误。`responseCode` 与错误一起提供。
ERR_APPLICATION_INSTALL_REFERRER_SERVICE_DISCONNECTED	与安装引荐来源网址服务的连接丢失。当尝试连接并设置安装引荐来源网址服务但连接丢失时，会引发此错误。请参阅安卓文档了解更多信息。

Expo 应用

安装

API

Constants

`Application.applicationId`

`Application.applicationName`

`Application.nativeApplicationVersion`

`Application.nativeBuildVersion`

Methods

`Application.getAndroidId()`

`Application.getInstallReferrerAsync()`

`Application.getInstallationTimeAsync()`

`Application.getIosApplicationReleaseTypeAsync()`

`Application.getIosIdForVendorAsync()`

`Application.getIosPushNotificationServiceEnvironmentAsync()`

`Application.getLastUpdateTimeAsync()`

Types

`PushNotificationServiceEnvironment`

Enums

`ApplicationReleaseType`

`UNKNOWN`

`SIMULATOR`

`ENTERPRISE`

`DEVELOPMENT`

`AD_HOC`

`APP_STORE`

错误代码