showSearch(context: context, delegate: DataSearch()); When you click item to other page, this is mean use listView & listTitle onTap: () { Navigator.push( context, new MaterialPageRoute( builder: (BuildContext context) => new PcPage(item), ) ); }, Then back to SearchDelegate Search bar can input ! Demo No problem because only change buildResults. So show on same page is OK. But usually show to other details page.

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flutter

https://www.youtube.com/watch?v=GLSG_Wh_YWc Stateless vs Stateful https://youtu.be/GLSG_Wh_YWc?t=8840 https://youtu.be/GpLb2XvKv20?t=946 https://medium.com/@matthew.smith_66715/why-we-chose-flutter-and-how-its-changed-our-company-for-the-better-271ddd25da60 State https://www.jianshu.com/p/ed9c3378e9cc https://tw.saowen.com/a/cff1432eff1eb306314bd241f231b4d693eaaa5aaa5310df9015fc7a0e53c134

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Sue boy

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Taiwan