Fixed bug with preare-file-usage in GDrive

added GetDisplayName in FileStorages

src/Kp2aBusinessLogic/Io/BuiltInFileStorage.cs

@@ -195,5 +195,10 @@ namespace keepass2android.Io
 		{
 			throw new NotImplementedException();
 		}
+
+		public string GetDisplayName(IOConnectionInfo ioc)
+		{
+			return ioc.GetDisplayName();
+		}
 	}
 }

src/Kp2aBusinessLogic/Io/CachingFileStorage.cs

@@ -476,6 +476,11 @@ namespace keepass2android.Io
 			_cachedStorage.OnActivityResult(activity, requestCode, resultCode, data);
 		}
 
+		public string GetDisplayName(IOConnectionInfo ioc)
+		{
+			return _cachedStorage.GetDisplayName(ioc);
+		}
+
 
 		public string GetBaseVersionHash(IOConnectionInfo ioc)
 		{

src/Kp2aBusinessLogic/Io/IFileStorage.cs

@@ -145,7 +145,11 @@ namespace keepass2android.Io
 		void OnResume(IFileStorageSetupActivity activity);
 		void OnStart(IFileStorageSetupActivity activity);
 		void OnActivityResult(IFileStorageSetupActivity activity, int requestCode, int resultCode, Intent data);
-		
+
+		/// <summary>
+		/// Converts the given path to a displayable string
+		/// </summary>
+		string GetDisplayName(IOConnectionInfo ioc);
 	}
 
 	public interface IWriteTransaction: IDisposable

src/Kp2aBusinessLogic/Io/JavaFileStorage.cs

@@ -275,6 +275,11 @@ namespace keepass2android.Io
 			_jfs.OnActivityResult(((IJavaFileStorageFileStorageSetupActivity) activity), requestCode, resultCode, data);
 		}
 
+		public string GetDisplayName(IOConnectionInfo ioc)
+		{
+			return _jfs.GetDisplayName(ioc.Path);
+		}
+
 		private DateTime JavaTimeToCSharp(long javatime)
 		{
 			return new DateTime(1970, 1, 1).AddMilliseconds(javatime);