reactiveui · glennawatson · Sep 6, 2025 · Sep 6, 2025 · Sep 6, 2025
diff --git a/src/Akavache.Core/Core/AkavacheBuilder.cs b/src/Akavache.Core/Core/AkavacheBuilder.cs
@@ -41,8 +41,12 @@ public AkavacheBuilder()
 
             ApplicationRootPath = Path.Combine(Path.GetDirectoryName(fileLocation)!, "..");
 
-            var fileVersionInfo = FileVersionInfo.GetVersionInfo(fileLocation);
-            Version = new(fileVersionInfo.ProductMajorPart, fileVersionInfo.ProductMinorPart, fileVersionInfo.ProductBuildPart, fileVersionInfo.ProductPrivatePart);
+            // Additional validation before calling FileVersionInfo.GetVersionInfo to prevent Android crashes
+            if (!string.IsNullOrWhiteSpace(fileLocation) && File.Exists(fileLocation))
+            {
+                var fileVersionInfo = FileVersionInfo.GetVersionInfo(fileLocation);
+                Version = new(fileVersionInfo.ProductMajorPart, fileVersionInfo.ProductMinorPart, fileVersionInfo.ProductBuildPart, fileVersionInfo.ProductPrivatePart);
+            }
         }
         catch
         {

diff --git a/src/Akavache.Tests/AndroidInitializationTests.cs b/src/Akavache.Tests/AndroidInitializationTests.cs
@@ -0,0 +1,80 @@
+// Copyright (c) 2025 .NET Foundation and Contributors. All rights reserved.
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for full license information.
+
+using System;
+using System.IO;
+using System.Reflection;
+using Akavache.Core;
+using NUnit.Framework;
+
+namespace Akavache.Tests
+{
+    /// <summary>
+    /// Tests for Android FileNotFoundException issue fix.
+    /// </summary>
+    [TestFixture]
+    public class AndroidInitializationTests
+    {
+        /// <summary>
+        /// Test that AkavacheBuilder constructor handles invalid file paths gracefully
+        /// without throwing FileNotFoundException (fixes Android crash issue).
+        /// </summary>
+        [Test]
+        public void AkavacheBuilder_ShouldHandleInvalidFilePathsGracefully()
+        {
+            // Arrange & Act & Assert
+            // This should not throw an exception even if file paths are invalid
+            Assert.DoesNotThrow(
+                () =>
+                {
+                    var builder = new AkavacheBuilder();
+
+                    // The builder should be created successfully
+                    Assert.That(builder, Is.Not.Null);
+                    Assert.That(builder.ApplicationName, Is.EqualTo("Akavache"));
+                },
+                "AkavacheBuilder constructor should handle invalid file paths gracefully");
+        }
+
+        /// <summary>
+        /// Test that the FileVersionInfo issue is fixed by ensuring File.Exists check works properly.
+        /// </summary>
+        [Test]
+        public void FileExists_ShouldPreventFileVersionInfoCrash()
+        {
+            // Arrange
+            var invalidPath = "/Akavache"; // This is the path that causes Android crashes
+
+            // Act & Assert
+            // File.Exists should return false for invalid paths without throwing
+            Assert.DoesNotThrow(
+                () =>
+                {
+                    var exists = File.Exists(invalidPath);
+                    Assert.That(exists, Is.False, "Invalid path should not exist");
+                },
+                "File.Exists should handle invalid paths gracefully");
+        }
+
+        /// <summary>
+        /// Integration test that verifies the complete initialization path works.
+        /// </summary>
+        [Test]
+        public void AkavacheBuilder_InitializationPath_ShouldNotCrash()
+        {
+            Assert.DoesNotThrow(
+                () =>
+                {
+                    // This simulates the path used in CacheDatabase.CreateBuilder()
+                    var builder = new AkavacheBuilder();
+                    builder.WithApplicationName("TestApp");
+
+                    // Should be able to access properties without crashing
+                    Assert.That(builder.ApplicationName, Is.EqualTo("TestApp"));
+                },
+                "Complete AkavacheBuilder initialization should work without crashes");
+        }
+    }
+}