C＃Xamarin.Android图像显示在文件管理器中，而不显示在图库中

Question

I made an application to save photos on the phone.

public void DownloadImage(string linkbitmap, string title)
    {           
        Bitmap bitmap = GetImageBitmapFromUrl(linkbitmap).Result;
        var path = Android.OS.Environment.GetExternalStoragePublicDirectory(Android.OS.Environment.DirectoryPictures + "/Tsundere");
        var complete = path.AbsolutePath;           
        var filepatch = System.IO.Path.Combine(complete, title + ".jpg");
        var filestream = new FileStream(filepatch, FileMode.Create);
        bitmap.Compress(Bitmap.CompressFormat.Png, 100, filestream);
        filestream.Close();
    }

The pictures are displayed in the file manager, but in the example the discord application does not have them. I have to restart the phone to be visible. How to make photos immediately visible in other applications, such as photos from the camera or photos downloaded from facebook?

Answer 1

Construct an Intent action ( Intent.ActionMediaScannerScanFile ) with a uri that includes the file path:

using (var file = new Java.IO.File(path))
using (var uri = Android.Net.Uri.FromFile(file))
{
    var scanFileIntent = new Intent(Intent.ActionMediaScannerScanFile, uri);
    SendBroadcast(scanFileIntent);
}

FYI: You can create/register a BroadcastReceiver that listens for Intent.ActionMediaScannerFinished to determine when the media scanner is done processing your request.

Answer 2

I solve this problem. Just add MediaScannerConnection.ScanFile(Android.App.Application.Context, new string[] {path}, null, null); in the code description this class https://developer.xamarin.com/api/type/Android.Media.MediaScannerConnection/