Get.defaultdialog causes application crashes-CodePudding

I have been working on this issue for hours. The problem is that if i create a new flutter project add this line of code.

  return Container(child: ElevatedButton(child: Text("ccc"),onPressed: (){
  Get.defaultDialog(
    title: "GeeksforGeeks",
    middleText: "Hello world!",
    backgroundColor: Colors.green,
    titleStyle: TextStyle(color: Colors.white),
    middleTextStyle: TextStyle(color: Colors.white),

     );
    },),);

I am getting this error.

  Null check operator used on a null value

I have tried reinstal package and other things(flutter doctor,pub get,flutter clean).But the problem persists.

CodePudding user response：

I tried it and I noticed the user has to use "GetMaterialApp" instead of "MaterialApp". After you replace you could get what you expect to have.

Fig1. Before

  Widget build(BuildContext context) {
    return MaterialApp(

After

Widget build(BuildContext context) {
    return GetMaterialApp(

Fig2. The error I got before replacing "MaterialApp" with "GetMaterialApp"

Fig3. the picture I got after changed. It works.