Android 및 iOS에서 주기적인 백그라운드 실행을 가능하게 하는 플러터 플러그인으로, 앱이 닫혀 있을 때도 데이터 동기화 또는 업데이트 가져오기와 같은 작업을 수행할 수 있게 해줍니다. Android의 헤드리스 JS 모드를 지원하여 신뢰할 수 있는 백그라운드 처리를 제공하며, 플랫폼 간 일관된 콜백을 제공합니다. 플랫폼별 특수한 대응책에 의존하지 않고 신뢰성 높은 백그라운드 활동이 필요한 개발자를 위한 것입니다.
Background Fetch is a very simple plugin which attempts to awaken an app in the background about every 15 minutes, providing a short period of background running-time. This plugin will execute your provided callbackFn whenever a background-fetch event occurs.
There is no way to increase the rate which a fetch-event occurs and this plugin sets the rate to the most frequent possible — you will never receive an event faster than 15 minutes. The operating-system will automatically throttle the rate the background-fetch events occur based upon usage patterns. Eg: if user hasn't turned on their phone for a long period of time, fetch events will occur less frequently or if an iOS user disables background refresh they may not happen at all.
:new: Background Fetch now provides a scheduleTask method for scheduling arbitrary "one-shot" or periodic tasks.
iOS
There is no way to increase the rate which a fetch-event occurs and this plugin sets the rate to the most frequent possible — you will never receive an event faster than 15 minutes. The operating-system will automatically throttle the rate the background-fetch events occur based upon usage patterns. Eg: if user hasn't turned on their phone for a long period of time, fetch events will occur less frequently.
scheduleTask seems only to fire when the device is plugged into power.
:warning: When your app is terminated, iOS no longer fires events — There is no such thing as stopOnTerminate: false for iOS.
iOS can take days before Apple's machine-learning algorithm settles in and begins regularly firing events. Do not sit staring at your logs waiting for an event to fire. If your simulated events work, that's all you need to know that everything is correctly configured.
If the user doesn't open your iOS app for long periods of time, iOS will stop firing events.
Android
The Android plugin provides a Headless implementation allowing you to continue handling events even after app-termination.
Copyright (c) 2018 Chris Scott, Transistor Software <chris@transistorsoft.com>
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