**YouTube** is an American [online video-sharing](https://en.wikipedia.org/wiki/Video_hosting_service "Video hosting service") [platform](https://en.wikipedia.org/wiki/Web_platform "Web platform") headquartered in [San Bruno, California](https://en.wikipedia.org/wiki/San_Bruno,_California "San Bruno, California")

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複数選択可能なファイル選択ダイアログ、ファイル一覧ファイルから配列化されたファイル情報、キャンセルするまで複数選択可能なファイル選択ダイアログの機能を提供する

拡張的な「ファイルを選択」アクティビティの提供

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かんたんファイル選択アクティビティ