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import 'package:device_info_plus/device_info_plus.dart';
import 'package:permission_handler/permission_handler.dart';Future<bool> storagePermission() async {final DeviceInfoPlugin info =DeviceInfoPlugin(); // import 'package:device_info_plus/device_info_plus.dart';final AndroidDeviceInfo androidInfo = await info.androidInfo;final int androidVersion = int.parse(androidInfo.version.release);bool havePermission = false;// Here you can use android api level// like android api level 33 = android 13// This way you can also find out how to request storage permissionif (androidVersion >= 13) {final request = await [// Permission.videos,// Permission.photos,Permission.audio,Permission.storage//..... as needed].request(); //import 'package:permission_handler/permission_handler.dart';havePermission =request.values.every((status) => status == PermissionStatus.granted);} else {final status = await Permission.storage.request();havePermission = status.isGranted;}if (!havePermission) {// if no permission then open app-settingawait openAppSettings();}return havePermission;
}

AndroidManifest.xml

    <!-- for below android 13--><uses-permission android:name="android.permission.MANAGE_EXTERNAL_STORAGE" tools:ignore="ScopedStorage" /><uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE" /><uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" /><!-- for above android 13--><uses-permission android:name="android.permission.READ_MEDIA_IMAGES" /><uses-permission android:name="android.permission.READ_MEDIA_VIDEO" /><uses-permission android:name="android.permission.READ_MEDIA_AUDIO" />