Fix: issues

dfc/src/main/java/com/lazygeniouz/dfc/file/DocumentFileCompat.kt

@@ -240,5 +240,13 @@ abstract class DocumentFileCompat constructor(
         fun isDocument(context: Context, uri: Uri): Boolean {
             return isDocumentUri(context, uri)
         }
+
+        /**
+         * Return whether the given [uri] is a tree uri.
+         */
+        internal fun isTreeUri(uri: Uri): Boolean {
+            val paths = uri.pathSegments
+            return paths.size >= 2 && "tree" == paths[0]
+        }
     }
 }

dfc/src/main/java/com/lazygeniouz/dfc/file/internals/SingleDocumentFileCompat.kt

@@ -2,6 +2,7 @@ package com.lazygeniouz.dfc.file.internals
 
 import android.content.Context
 import android.net.Uri
+import android.provider.DocumentsContract
 import com.lazygeniouz.dfc.file.DocumentFileCompat
 import com.lazygeniouz.dfc.resolver.ResolverCompat
 
@@ -96,6 +97,9 @@ internal class SingleDocumentFileCompat(
          * Build a [SingleDocumentFileCompat] from a given [uri].
          */
         internal fun make(context: Context, self: Uri): SingleDocumentFileCompat? {
+            if (isTreeUri(self)) return null
+            if (!DocumentsContract.isDocumentUri(context, self)) return null
+
             ResolverCompat.getCursor(context, self, ResolverCompat.fullProjection)
                 ?.use { cursor ->
                     if (cursor.moveToFirst()) {

dfc/src/main/java/com/lazygeniouz/dfc/file/internals/TreeDocumentFileCompat.kt

@@ -103,14 +103,6 @@ internal class TreeDocumentFileCompat constructor(
 
     internal companion object {
 
-        /**
-         * Return whether the given [uri] is a tree uri.
-         */
-        private fun isTreeUri(uri: Uri): Boolean {
-            val paths = uri.pathSegments
-            return paths.size >= 2 && "tree" == paths[0]
-        }
-
         /**
          * Build the initial [TreeDocumentFileCompat] from a given [uri].
          */
@@ -120,9 +112,12 @@ internal class TreeDocumentFileCompat constructor(
             }
 
             // build a new tree uri if this is a first tree doc creation...
-            val treeUri = if (isInitial) DocumentsContract.buildDocumentUriUsingTree(
-                uri, DocumentsContract.getTreeDocumentId(uri)
-            ) else uri
+            // but only if the uri is not already a document uri to preserve subdir info.
+            val treeUri = if (isInitial && !DocumentsContract.isDocumentUri(context, uri)) {
+                DocumentsContract.buildDocumentUriUsingTree(
+                    uri, DocumentsContract.getTreeDocumentId(uri)
+                )
+            } else uri
 
             ResolverCompat.getCursor(context, treeUri, ResolverCompat.fullProjection)
                 ?.use { cursor ->