No MaterialLocalizations found. AppBar widgets require MaterialLocalizations to be provided by a Loc

No MaterialLocalizations found. AppBar widgets require MaterialLocalizations to be provided by a Localizations widget ancestor. 錯誤很明顯，抓住重點（紅色的位置）。意思是什麼呢？是說系統的本地化多語言找不到對應的多語言縮寫。 如果你的應用剛好也是有多語言適配，那麼問題就出

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