facebookarchive/Keyframes

Documentation: Explain about decoding JSON in the background

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#103 建立於 2017年1月12日

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 (1 留言) (0 反應) (0 負責人)JavaScript (5,337 star) (304 fork)batch import
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描述

Hey guys,

Using the Android library here. When loading large json files, I'm getting around a 2-3 second UI hang. This was obviously undesired and I narrowed down the issue to being in the deserialization of the asset from the InputStream. The way I got around the issue was by using an Rx chain and pushing the deserialization off of the UI thread while providing a Looper from a HandlerThread to the Scheduler. I'm sure this can be achieved in a similar fashion with AsyncTask if needed.

In general, the file still takes around 2 seconds to load while on a background thread. Our animation files are around 30k - 50k lines long.

貢獻者指南

技術棧
androidjava
領域
mobile
議題類型
documentation
難度面向新貢獻者的預計實作難度，1 表示很小改動，5 表示專家級工作。
3
預計時間有經驗貢獻者完成調查、實作、測試並準備 pull request 的粗略時間範圍。
half day
活動狀態議題目前的可參與程度：新鮮、活躍、陳舊、阻塞或等待維護者輸入。
stale
清晰度議題是否清楚說明預期改動、驗收標準和下一步。
clear
前置要求
basic Android developmentknowledge of JSON parsingunderstanding of UI threading
新手友善度1-100 的估計分數，表示該議題對首次貢獻者的友善程度。
60
研究方向
The issue asks for documentation on performing JSON decoding in a background thread to avoid UI hangs. The library loads JSON files, and the user experienced a 2-3 second freeze. To address this, examine the library's asset loading code, likely in the Android module (e.g., Keyframes/Android/...). Document how to use RxJava or AsyncTask to offload deserialization, referencing the existing InputStream handling. Note that the repository is archived, so any new documentation may need to be in a fork or separate guide.