Flutter share image intent

Question

I am trying to share an image via classic Intent. I have added the following items:

file_paths.xml:

<?xml version="1.0" encoding="utf-8"?>
<paths>
    <files-path name="my_images" path="." />
</paths>

Manifest:

    <provider
        android:name="android.support.v4.content.FileProvider"
        android:authorities="com.example.android.fileprovider"
        android:exported="false"
        android:grantUriPermissions="true">
        <meta-data
            android:name="android.support.FILE_PROVIDER_PATHS"
            android:resource="@xml/file_paths" />
    </provider>

And finally MainActivity.java:

private void shareFile(String fileName) {
        Intent share = new Intent(Intent.ACTION_SEND);
        Uri uri = FileProvider.getUriForFile(this, "com.example.android.fileprovider", new File(this.getApplicationInfo().dataDir + "/app_flutter/userphotos", fileName));
        share.setData(uri);
        share.setType("image/png");
        share.putExtra(Intent.EXTRA_STREAM, uri);
        share.addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
        startActivity(Intent.createChooser(share, "Share"));
    }

The problem I am facing is that image I am trying to share has the following path:

/data/user/0/shoedrobe.innovativeproposals.com.shoedrobe/app_flutter/userphotos/receipt20181101094430.jpg

However the FileProvider is trying to access it from here:

java.lang.IllegalArgumentException: Failed to find configured root that contains /data/data/shoedrobe.innovativeproposals.com.shoedrobe/app_flutter/userphotos/receipt20181101094430.jpg

For saving images I am using package path_provider and I am saving items under getApplicationDocumentsDirectory(), which in Android is AppData directory.

I am not sure why FileProvider decided suddenly to go from /data/user/0/ to /data/data/ folder, therefore any help or tips regarding this matter would be highly appreciated.

Update:
I have updated the code as per recommendations and replaced the Uri under MainActivity.java with the following line:

Uri uri = FileProvider.getUriForFile(this, "com.example.android.fileprovider", new File(this.getDir("flutter", Context.MODE_PRIVATE).getPath() + "/app_flutter/userphotos", path));

Nonetheless, the problem still persists (same exception that file is supposed to be under /data/data/<package> instead of /data/user/0. I have also tried to add additional persmissions to my AndroidManifest:

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
<uses-permission android:name="android.permission.READ_EXTERNAL_STORAGE"/>

but it did not work as well. Could the problem lie with my file_paths.xml file?

Solution

In the end, none of the proposed solutions did not work; neither using extenal-path, nor the other solution.

The way how I managed in the end to share file was to actually copy it to a temporary (cache) directory first (in flutter path_provider it's getTemporaryDirectory()) and update file_paths.xml to following:

<cache-path name="image" path="."/>

and finally under MainActivity.java:

Uri uri = FileProvider.getUriForFile(this, "com.example.android.fileprovider", new File(this.getCacheDir(), path));