在Android应用中使用WorkManager处理后台工作

WorkManager Codelab =================================== This repository contains the code for the [WorkManager Codelab](https://developer.android.com/codelabs/basic-android-kotlin-compose-workmanager). Introduction ------------ At I/O 2018, Google announced [Android Jetpack](https://developer.android.com/jetpack/), a collection of libraries, tools, and architectural guidance to accelerate and simplify the development of great Android apps. One of those libraries is the [WorkManager library](https://developer.android.com/topic/libraries/architecture/workmanager/). The WorkManager library provides a unified API for deferrable one-off or recurring background tasks that need guaranteed execution. You can learn more by reading the [WorkManager Guide](https://developer.android.com/topic/libraries/architecture/workmanager/), the [WorkManager Reference](https://developer.android.com/reference/androidx/work/package-summary) or doing the [WorkManager Codelab](https://developer.android.com/codelabs/basic-android-kotlin-compose-workmanager). Pre-requisites -------------- * Familiarity with how to open, build, and run apps with Android Studio. * Make sure Android Studio is updated, as well as your SDK and Gradle. Otherwise, you may have to wait for a while until all the updates are done. * A device or emulator that runs API level 21+ You need to be solidly familiar with the Kotlin programming language, object-oriented design concepts, and Android Development Fundamentals. In particular: * Basics of [Jetpack Compose](https://developer.android.com/courses/pathways/compose) * Some familiarity with URIs and File I/O * Familiarity with [Kotlin Flow](https://developer.android.com/kotlin/flow) and [ViewModel](https://developer.android.com/topic/libraries/architecture/viewmodel) Getting Started --------------- 1. [Install Android Studio](https://developer.android.com/studio/install.html), if you don't already have it. 2. Download the sample. 3. Import the sample into Android Studio. 4. Build and run the sample. Notes: - The application code contains a battery not low constraint. If the device/emulator has a low battery, the application will appear to hang until this constraint is met. - The app requires notifications to be enabled. To enable notifications, navigate to the Android Settings menu > Apps > Blur-O-Matic > Notifications > Enable "All Blur-O-Matic notifications".