GES_PAC

using Android.Content;

using Android.Provider;

using System.Text;

public static class AndroidFileHelper

{

    public static void SaveJsonToDownloads(string fileName, string content)

    {

        var context = Android.App.Application.Context;

        ContentValues values = new ContentValues();

        values.Put(MediaStore.IMediaColumns.DisplayName, fileName);

        values.Put(MediaStore.IMediaColumns.MimeType, "text/json");

        values.Put(MediaStore.IMediaColumns.RelativePath, $"{Android.OS.Environment.DirectoryDownloads}/GES_PAC");

        var uri = context.ContentResolver.Insert(MediaStore.Downloads.ExternalContentUri, values);

        if (uri == null) throw new IOException("Impossible de créer le fichier.");

        using var stream = context.ContentResolver.OpenOutputStream(uri);

        using var writer = new StreamWriter(stream, Encoding.UTF8);

        writer.Write(content);

        writer.Flush();

    }

    public static void SaveCSVToDownloads(string folderName, string[] contents)

    {

        if (contents.Length != 3)

            throw new ArgumentException("Le tableau de contenu doit contenir exactement 3 éléments.");

        var context = Android.App.Application.Context;

        string[] fileNames = { "mesures.csv", "comportements.csv", "calibrations.csv" };

        string folderPath = $"{Android.OS.Environment.DirectoryDownloads}/GES_PAC/{folderName.Replace("/","_")}";

        for (int i = 0; i < fileNames.Length; i++)

        {

            ContentValues values = new ContentValues();

            values.Put(MediaStore.IMediaColumns.DisplayName, fileNames[i]);

            values.Put(MediaStore.IMediaColumns.MimeType, "text/csv");

            values.Put(MediaStore.IMediaColumns.RelativePath, folderPath);

            var uri = context.ContentResolver.Insert(MediaStore.Downloads.ExternalContentUri, values);

            if (uri == null) throw new IOException($"Impossible de créer le fichier {fileNames[i]}.");

            using var stream = context.ContentResolver.OpenOutputStream(uri);

            using var writer = new StreamWriter(stream, Encoding.UTF8);

            foreach (var line in contents[i])

            {

                writer.Write(line);

            }

            writer.Flush();

        }

    }

}