Flutter uygulamamda yorum yapamıyorum

class ImagesYorumlar extends StatefulWidget {
 bool click = false;
 String name;
 ImagesYorumlar({required this.name});
 _ImagesYorumlarState createState() => _ImagesYorumlarState();
}

class _ImagesYorumlarState extends State<ImagesYorumlar> {
 bool click = false;
 Color _favIconColor = Colors.grey;
 Color _comIconColor = Colors.grey;
 Color _bookColor = Colors.grey;
 @override
 Widget build(BuildContext context) {
 return MaterialApp(
 debugShowCheckedModeBanner: false,
 home: Scaffold(
 body: Yorumlar(),
 ),
 );
 }
}

class Yorumlar extends StatefulWidget {
 const Yorumlar({Key? key}) : super(key: key);
 _YorumlarState createState() => _YorumlarState();
}

class _YorumlarState extends State<Yorumlar> {
 TextEditingController t1 = TextEditingController();

 List mesajListesi = [];

 listeyeMesajEkle(String metin) {
 setState(() {
 mesajListesi.insert(0, metin);
 t1.clear();
 });
 }

 @override
 Widget build(BuildContext context) {
 return MaterialApp(
 debugShowCheckedModeBanner: false,
 home: Scaffold(
 body: Container(
 child: Column(children: [
 SizedBox(height: 5),
 Row(children: [
 SizedBox(
 width: 300,
 child: TextField(
 onSubmitted: listeyeMesajEkle,
 controller: t1,
 decoration: new InputDecoration(
 labelText: "Yorum Ekle...",
 fillColor: Colors.black,
 border: new OutlineInputBorder(
 borderRadius: new BorderRadius.circular(25.0),
 borderSide: new BorderSide(),
 ),
 ),
 ),
 ),
 IconButton(
 icon: Icon(Icons.send),
 onPressed: () {
 listeyeMesajEkle(t1.text);
 }),
 ]),
 Flexible(
 child: ListView.builder(
 reverse: true,
 itemCount: mesajListesi.length,
 itemBuilder: (context, int indeksNumarasi) => Container(
 child: Column(
 children: [
 Padding(
 padding: EdgeInsets.all(16),
 child: Row(
 children: [
 //Profile Photo.
 Container(
 width: 40,
 height: 40,
 decoration: BoxDecoration(
 color: Colors.grey[300],
 shape: BoxShape.circle,
 ),
 child: Stack(
 children: [
 Container(
 width: 40,
 height: 40,
 decoration: BoxDecoration(
 border: Border.all(width: 4, color: Theme.of(context).scaffoldBackgroundColor),
 boxShadow: [
 BoxShadow(
 spreadRadius: 2,
 blurRadius: 10,
 color: Colors.black.withOpacity(0.1),
 ),
 ],
 shape: BoxShape.circle,
 ),
 child: GestureDetector(onTap: () {}),
 ),
 ],
 ),
 ),
 SizedBox(width: 10),
 InkWell(
 child: FlatButton(child: Text("asdasd"), onPressed: () {}),
 )
 ],
 )),
 //Yazı alanı.
 Text(t1.toString(), style: TextStyle(color: Colors.black)),
 //İkonlar
 Container(
 padding: EdgeInsets.only(left: 15, bottom: 0, right: 0, top: 2),
 child: Row(children: [
 IconButton(
 icon: Icon(Icons.favorite),
 color: Colors.grey,
 tooltip: 'Add to favorite',
 onPressed: () {
 setState(() {});
 },
 ),
 SizedBox(width: 5),
 IconButton(
 icon: Icon(Icons.question_answer),
 color: Colors.grey,
 tooltip: 'Add to BookShelf',
 onPressed: () {},
 ),
 ]))
 ],
 ),
 ),
 ),
 ),
 ])),
 ));
 }
}