颤音：隐藏后键盘会自动显示

Question

当Textfield中有内容时，如果点击TextField，则会显示键盘，这还可以。但是，当按下键盘按钮或在键盘中解开按钮时，键盘将被隐藏，然后再次自动显示。

Flutter版本：1.22.5
飞镖版本：2.10.4
手机：小米8（android 10）

class _MyHomePageState extends State<MyHomePage> {
  int _counter = 0;

  void _incrementCounter() {
    setState(() {
      _counter++;
    });
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            Text(
              'You have pushed the button this many times:',
            ),
            Text(
              '$_counter',
              style: Theme.of(context).textTheme.headline4,
            ),
            SizedBox(height: 80),
            TextField(
              onChanged: (value){
                print('$value');
              },
            )
          ],
        ),
      ),
      floatingActionButton: FloatingActionButton(
        onPressed: _incrementCounter,
        tooltip: 'Increment',
        child: Icon(Icons.add),
      ), // This trailing comma makes auto-formatting nicer for build methods.
    );
  }
}