How to get the path to the internal memory of the smartphone and the DCIM folder?

问题

How to get the path to the internal memory of the smartphone and the DCIM folder, then to save the photo there?

string directory = System.IO.Path.Combine(Android.OS.Environment.ExternalStorageDirectory.AbsolutePath, Android.OS.Environment.DirectoryDownloads);
FileStream file = new FileStream(System.IO.Path.Combine(directory, "newProdict_" + product.Width + "x" + product.Height + ".png"), FileMode.OpenOrCreate);

回答1:

You can get the DCIM folder like that:

var dcimFolder = Android.OS.Environment.GetExternalStoragePublicDirectory(System.Environment.DirectoryDcim).Path;

For writing files you can use the nuget package PCLStorage so you already have everything in a cross platform manner:

var folder = await FileSystem.Current.GetFolderFromPathAsync(dcimFolder);
var file = await folder.CreateFileAsync("image.jpg", CreationCollisionOption.ReplaceExisting);
byte[] buffer = new byte[100];
using (System.IO.Stream stream = await file.OpenAsync(FileAccess.ReadAndWrite))
{
    stream.Write(buffer, 0, 100);
}

来源：https://stackoverflow.com/questions/44584067/how-to-get-the-path-to-the-internal-memory-of-the-smartphone-and-the-dcim-folder