how to take photo and.save into DCIM folder in android

[flagshang]

how to take photo and save into DCIM folder in android? thanks

[Onizuka893]

public static class ImageSaveHelper
{
public static async Task SaveImage(Stream imageStream)
{
using var stream = imageStream;
using var memoryStream = new MemoryStream();
stream.CopyTo(memoryStream);

        stream.Position = 0;
        memoryStream.Position = 0;

#if WINDOWS
await System.IO.File.WriteAllBytesAsync(
@"C:\Users\Onizuka\Pictures\Test.png", memoryStream.ToArray());
#elif ANDROID
var context = Platform.CurrentActivity;

    if (OperatingSystem.IsAndroidVersionAtLeast(29))
    {
        Android.Content.ContentResolver resolver = context.ContentResolver;
        Android.Content.ContentValues contentValues = new();
        contentValues.Put(Android.Provider.MediaStore.IMediaColumns.DisplayName, "image.png");
        contentValues.Put(Android.Provider.MediaStore.IMediaColumns.MimeType, "image/png");
        contentValues.Put(Android.Provider.MediaStore.IMediaColumns.RelativePath, "DCIM/" + "image");
        Android.Net.Uri imageUri = resolver.Insert(Android.Provider.MediaStore.Images.Media.ExternalContentUri, contentValues);
        var os = resolver.OpenOutputStream(imageUri);
        Android.Graphics.BitmapFactory.Options options = new();
        options.InJustDecodeBounds = true;
        var bitmap = Android.Graphics.BitmapFactory.DecodeStream(stream);
        bitmap.Compress(Android.Graphics.Bitmap.CompressFormat.Png, 100, os);
        os.Flush();
        os.Close();
    }
    else
    {
        Java.IO.File storagePath = Android.OS.Environment.GetExternalStoragePublicDirectory(Android.OS.Environment.DirectoryPictures);
        string path = System.IO.Path.Combine(storagePath.ToString(), "image.png");
        System.IO.File.WriteAllBytes(path, memoryStream.ToArray());
        var mediaScanIntent = new Android.Content.Intent(Android.Content.Intent.ActionMediaScannerScanFile);
        mediaScanIntent.SetData(Android.Net.Uri.FromFile(new Java.IO.File(path)));
        context.SendBroadcast(mediaScanIntent);
    }

#elif IOS || MACCATALYST
var image = new UIKit.UIImage(Foundation.NSData.FromArray(memoryStream.ToArray()));
image.SaveToPhotosAlbum((image, error) =>
{
});
#endif
}
}

this is a image helper class. On Android it should save it to the DCIM folder.