Lower android version storage permission issue. Flutter - flutter

Question

I am using a package permission handler in my app. I am using an android 9 mobile.
This is my AndroidManifest.xml
<manifest xmlns:android="http://schemas.android.com/apk/res/android"
package="com.example.light_chat">
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"
android:maxSdkVersion="28"/>
<uses-permission android:name="android.permission.MANAGE_EXTERNAL_STORAGE"
android:maxSdkVersion="28"/>
<uses-permission android:name="android.permission.ACTION_MANAGE_ALL_FILES_ACCESS_PERMISSION"/>
<application
android:requestLegacyExternalStorage="true">
android:label="light_chat"
android:name="${applicationName}"
android:icon="#mipmap/ic_launcher">
<activity
android:name=".MainActivity"
android:exported="true"
android:launchMode="singleTop"
android:theme="#style/LaunchTheme"
android:configChanges=
"orientation|keyboardHidden|keyboard|screenSize|
smallestScreenSize|locale|layoutDirection|fontScale|screenLayout|density|uiMode"
android:hardwareAccelerated="true"
android:windowSoftInputMode="adjustResize">
<!-- Specifies an Android theme to apply to this Activity as soon as
the Android process has started. This theme is visible to the user
while the Flutter UI initializes. After that, this theme continues
to determine the Window background behind the Flutter UI. -->
<meta-data
android:name="io.flutter.embedding.android.NormalTheme"
android:resource="#style/NormalTheme"
/>
<intent-filter>
<action android:name="android.intent.action.MAIN"/>
<category android:name="android.intent.category.LAUNCHER"/>
</intent-filter>
</activity>
<!-- Don't delete the meta-data below.
This is used by the Flutter tool to generate GeneratedPluginRegistrant.java -->
<meta-data
android:name="flutterEmbedding"
android:value="2" />
android:usesCleartextTraffic="true"
</application>
</manifest>
And This is my homePage where I am making the permission function
and calling in initState();
import 'package:cloud_firestore/cloud_firestore.dart';
import 'package:firebase_auth/firebase_auth.dart';
import 'package:flutter/material.dart';
import 'package:light_chat/layout/const_size.dart';
import 'package:light_chat/layout/repeateCode.dart';
import 'package:permission_handler/permission_handler.dart';
import 'sign_in.dart';
import 'functions.dart';
import 'chat_room.dart';
import 'package:permission_handler/permission_handler.dart';
class MyHomePage extends StatefulWidget {
const MyHomePage({Key? key}) : super(key: key);
#override
State<MyHomePage> createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> with WidgetsBindingObserver {
late final size = MediaQuery
.of(context)
.size;
bool isLoading = false;
Map<String, dynamic>? userMap;
TextEditingController _serachBarController = TextEditingController();
FirebaseAuth _auth = FirebaseAuth.instance;
String chatRoomId(String user1, String user2){
if(user1[0].toLowerCase().codeUnits[0] >
user2[0].toLowerCase().codeUnits[0]){
return '$user1 $user2';
}
else
{
return '$user2 $user1';
}
}
#override
void onSearch() async {
FirebaseFirestore _firestore = FirebaseFirestore.instance;
setState(() {
isLoading = true;
});
await _firestore.collection('users').where(
'email', isEqualTo: _serachBarController.text)
.get().then((value) {
setState(() {
if (value.docs.length > 0) {
userMap = value.docs[0].data();
print(userMap);
isLoading = false;
}
});
});
}
FirebaseFirestore _firestore = FirebaseFirestore.instance;
#override
void initState() {
permission();
WidgetsBinding.instance.addObserver(this);
statusChange('Online');
// TODO: implement initState
super.initState();
}
Here is the permission function i want to allow my mobile second permission
var status1
but my stack thorwing exception that is no permission in menifest file.
i am using android 9 so this is the problem
those permissions i am adding in menifest, for android 11.
i want to know which permission i add in menifest for android 9 or under 9.
void permission ()async{
// var status0= await Permission.storage.status;
// if (!status0.isGranted){
// await Permission.storage.request();
// }
var status1= await Permission.manageExternalStorage.status;
if (!status1.isGranted){
await Permission.manageExternalStorage.request();
}
}
void statusChange(String status)async{
await _firestore.collection('users').doc(_auth.currentUser!.uid).update(
{
'status' : status
});
}
#override
void didChangeAppLifecycleState(AppLifecycleState state) {
if(state == AppLifecycleState.resumed){
statusChange('Online');
}
else
{
statusChange('Offline');
}
// TODO: implement didChangeAppLifecycleState
super.didChangeAppLifecycleState(state);
}
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(title: Text('Home',),
actions: [
IconButton(onPressed: () => logOut(context), icon: Icon(Icons.logout))
],
backgroundColor: Colors.blue,),
body: isLoading ?
Center(child:
Container(
height: size.height / 20,
width: size.width / 20,
child: CircularProgressIndicator(),
),)
: Column(
children: [
SizedBox(height: 10.0,),
RepeateTextFieldCode(controller: _serachBarController,
keyboardType: TextInputType.emailAddress,
lableText: 'Search'),
ElevatedButton(onPressed: () => onSearch(),
child: Text('Search', style: buttonText,),
style: ButtonStyle(
backgroundColor: MaterialStateProperty.all(Colors.blue),
),
),
userMap != null ?
ListTile(
onTap: () {
String roomId = chatRoomId(_auth.currentUser!.displayName!,
userMap?['name']);
Navigator.push(context,MaterialPageRoute(builder: (_)=> ChatRoom(
chatRoomId: roomId,
userMap: userMap,
)));
},
title: Text(userMap?['name'], style: titleText,),
subtitle: Text(userMap?['email'], style: subtitleText,),
leading: Icon(Icons.account_box, color: Colors.black,),
trailing: Icon(Icons.chat, color: Colors.black,),
) :
Container(),
],
),
);
}
}