CODEWITHSUNDEEP
androidfileuploaduri
Artūrs Eimanis
Artūrs Eimanis

Reputation: 596

Android working with URIs

I am writing an app that can upload files. The files are either received by using StartActivityForResult or received via share menu from other apps.

I have run into some problems with receiving files via share menu, specifically determining the file info. Before an upload i need to know the name and size of the file. When sharing from apps like gallery app or Google Photos, everything works fine - URI with content:// scheme is received and i can use ContentResolver to get the name and size. But from some apps i receive a URI with file:// scheme and the same method doesn't work anymore. Is there a way to get file info from URIs with both schemes? And is there a way that guarantees that it will work for all possible URIs?

Code for getting file info:

string folderName = "";
Android.Net.Uri tempUri = null;
switch (Intent.Action) {
case Intent.ActionSend:
    var result = Intent.GetParcelableExtra (Intent.ExtraStream);
    tempUri = Android.Net.Uri.Parse(result.ToString());
    break;
case Intent.ActionSendMultiple:
    var uris = Intent.GetParcelableArrayListExtra(Intent.ExtraStream);
    tempUri = Android.Net.Uri.Parse(uris[0].ToString());
    break;
}

if (tempUri != null) {
    var cursor = this.ContentResolver.Query (tempUri, null, null, null, null);
    if (cursor != null && cursor.MoveToFirst ())
        folderName = cursor.GetString (cursor.GetColumnIndex (Android.Provider.OpenableColumns.DisplayName));
}

Upvotes: 0

Views: 123

Answers (1)

CommonsWare
CommonsWare

Reputation: 1006924

Is there a way to get file info from URIs with both schemes?

Wrap the file: or content: Uri in a DocumentFile. Then, call getType() and length() on the DocumentFile. In the case of file: and getType(), I presume that DocumentFile is using MimeTypeMap under the covers to try to guess a MIME type.

And is there a way that guarantees that it will work for all possible URIs?

No.

Upvotes: 1

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