Flutter:非事件InputConnection上的getTextBeforeCursor

Question

我正在尝试检索TextField标题内的用户输入，以便可以将其传递给名为 void _filterList(value)的函数。
但是，每次我输入一些文本时，都会出现以下错误:

W/IInputConnectionWrapper( 7715): getTextBeforeCursor on inactive InputConnection
W/IInputConnectionWrapper( 7715): getSelectedText on inactive InputConnection
W/IInputConnectionWrapper( 7715): getTextAfterCursor on inactive InputConnection
W/IInputConnectionWrapper( 7715): beginBatchEdit on inactive InputConnection
W/IInputConnectionWrapper( 7715): getTextBeforeCursor on inactive InputConnection
W/IInputConnectionWrapper( 7715): endBatchEdit on inactive InputConnection

这是我的代码:

List filteredlist = [];
List entries = [];
bool isSearching = false;

getCountries() async {
  var response =
    await Dio().get('https://restcountries.eu/rest/v2/regionalbloc/eu');
return response.data;
}

@override
void initState() {
getCountries().then((data) {
  setState(() {
    entries = filteredlist = data;
  });
});
super.initState();
}

@override
Widget build(BuildContext context) {
return Scaffold(
    appBar: AppBar(
      backgroundColor: Colors.blue,
      title: !isSearching
          ? Text('All EU Countries')
          : TextField(
              onChanged: (value) {
                _filterList(value);
              },
              style: TextStyle(color: Colors.white),
              decoration: InputDecoration(
                icon: Icon(Icons.search, color: Colors.white),
                hintText: "Search Here",
                hintStyle: TextStyle(color: Colors.white),
              )),
      actions: <Widget>[
        isSearching
            ? IconButton(
                icon: Icon(Icons.cancel),
                onPressed: () {
                  setState(() {
                    this.isSearching = false;
                    filteredlist = entries;
                  });
                },
              )
            : IconButton(
                icon: Icon(Icons.search),
                onPressed: () {
                  setState(() {
                    this.isSearching = true;
                  });
                })
      ],
    ),
    body: _buildList());
}

这是我的功能:

void _filterList(value) {
setState(() {
  filteredlist = entries.where(
      (entry) => entry['name'].toLoweCase().contains(value.toLowerCase()));
});

}
据我所知，键盘似乎有问题，但是我还没有弄清楚如何防止键盘损坏

Answer 1

已知问题，已跟踪here。即使这个sample code在android中也会发出警告。造成问题的原因尚未达成共识。

I did a little bit of digging. It looks like Android is generating these warnings because we are holding the InputConnection incorrectly in the Engine's TextInputPlugin. I haven't really figured out what we're doing wrong, though.

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