Major speed optimizations for exploring very large folders on Android 11+ (Storage Access Framework) (closes #67)

Author: yasirkula

.github/AAR Source (Android)/java/com/yasirkula/unity/FileBrowser.java

@@ -301,16 +301,9 @@ public static void CopyDirectory( Context context, String sourceRawUri, String d
 	public static String OpenSAFFolder( Context context, String rawUri )
 	{
 		FileBrowserSAFEntry directory = new FileBrowserSAFEntry( context, Uri.parse( rawUri ) );
-		ArrayList<FileBrowserSAFEntry> entries = directory.listFiles();
 
 		stringBuilder.setLength( 0 );
-		stringBuilder.append( entries.size() ).append( "<>" );
-
-		for( int i = 0; i < entries.size(); i++ )
-		{
-			FileBrowserSAFEntry entry = entries.get( i );
-			stringBuilder.append( entry.isDirectory() ? "d" : "f" ).append( entry.getName() ).append( "<>" ).append( entry.getUri().toString() ).append( "<>" );
-		}
+		directory.appendFilesToStringBuilder( stringBuilder );
 
 		return stringBuilder.toString();
 	}

.github/AAR Source (Android)/java/com/yasirkula/unity/FileBrowserSAFEntry.java

@@ -271,6 +271,49 @@ public ArrayList<FileBrowserSAFEntry> listFiles()
 		return results;
 	}
 
+	public void appendFilesToStringBuilder( StringBuilder stringBuilder )
+	{
+		final ContentResolver resolver = mContext.getContentResolver();
+		final Uri childrenUri = DocumentsContract.buildChildDocumentsUriUsingTree( mUri, DocumentsContract.getDocumentId( mUri ) );
+		Cursor c = null;
+		try
+		{
+			c = resolver.query( childrenUri, new String[] { DocumentsContract.Document.COLUMN_DOCUMENT_ID, DocumentsContract.Document.COLUMN_MIME_TYPE, DocumentsContract.Document.COLUMN_DISPLAY_NAME }, null, null, null );
+			stringBuilder.append( c.getCount() ).append( "<>" );
+			if( c.moveToNext() )
+			{
+				int documentIdIndex = c.getColumnIndex( DocumentsContract.Document.COLUMN_DOCUMENT_ID );
+				int mimeTypeIndex = c.getColumnIndex( DocumentsContract.Document.COLUMN_MIME_TYPE );
+				int nameIndex = c.getColumnIndex( DocumentsContract.Document.COLUMN_DISPLAY_NAME );
+
+				do
+				{
+					final boolean isDirectory = DocumentsContract.Document.MIME_TYPE_DIR.equals( c.getString( mimeTypeIndex ) );
+					final String name = c.getString( nameIndex );
+					final String uri = DocumentsContract.buildDocumentUriUsingTree( mUri, c.getString( documentIdIndex ) ).toString();
+
+					stringBuilder.append( isDirectory ? "d" : "f" ).append( name ).append( "<>" ).append( uri ).append( "<>" );
+				} while( c.moveToNext() );
+			}
+		}
+		catch( Exception e )
+		{
+			Log.w( "Unity", "Failed query: " + e );
+		}
+		finally
+		{
+			try
+			{
+				if( c != null )
+					c.close();
+			}
+			catch( Exception e )
+			{
+				Log.e( TAG, "Exception:", e );
+			}
+		}
+	}
+
 	public String renameTo( String displayName )
 	{
 		try

Plugins/SimpleFileBrowser/Android/SimpleFileBrowser.aar

@@ -1,7 +1,7 @@
 {
   "name": "com.yasirkula.simplefilebrowser",
   "displayName": "Simple File Browser",
-  "version": "1.5.5",
+  "version": "1.5.6",
   "documentationUrl": "https://github.com/yasirkula/UnitySimpleFileBrowser",
   "changelogUrl": "https://github.com/yasirkula/UnitySimpleFileBrowser/releases",
   "licensesUrl": "https://github.com/yasirkula/UnitySimpleFileBrowser/blob/master/LICENSE.txt",