在showDialog方法中，安卓机型点击返回键，barrierDismissible不能阻止dialog pop，需要传异步方法进onWillPop，示例如下：
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Future<Null> showPermissionAlert(BuildContext context) async { return showDialog<Null>( context: context, barrierDismissible: false, builder: (BuildContext context) { return new WillPopScope( onWillPop: () async => false, child: AlertDialog( title: Text('Allow the app to always use your location'), content: SingleChildScrollView( child: ListBody( children: <Widget>[ Text('Something'), ], ), ), actions: <Widget>[ FlatButton( child: Text('doSomething'), onPressed: () { Navigator.of(context).pop(); }, ) ], ) ); }); } |
