samples/Support4Demos/res/xml/my_paths.xml

<!-- BEGIN_INCLUDE(file_provider_paths_declaration) -->
<paths xmlns:android="http://schemas.android.com/apk/res/android">
    <!-- Offer access to files under Context.getFilesDir() + "thumbs/"
         through alias "my_thumbs" -->
    <files-path name="my_thumbs" path="thumbs/" />

    <!-- Offer access to files under Environment.getExternalStorageDirectory()
         through alias "my_external" -->
    <external-path name="my_external" />

    <!-- Offer access to files under Context.getCacheDir() -->
    <cache-path name="my_cache" />
</paths>
<!-- END_INCLUDE(file_provider_paths_declaration) -->